Merged in lindenlab/viewer-lynx

68 files changed, 5244 insertions, 1284 deletions

diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index 2fc722d4c3..ce8b662231 100644
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -151,6 +151,7 @@ set(viewer_SOURCE_FILES
     llcommunicationchannel.cpp
     llcompilequeue.cpp
     llconfirmationmanager.cpp
+    llcontrolavatar.cpp
     llconversationlog.cpp
     llconversationloglist.cpp
     llconversationloglistitem.cpp
@@ -604,6 +605,7 @@ set(viewer_SOURCE_FILES
     lltransientfloatermgr.cpp
     lltranslate.cpp
     lltwitterconnect.cpp
+    lluiavatar.cpp
     lluilistener.cpp
     lluploaddialog.cpp
     llurl.cpp
@@ -773,6 +775,7 @@ set(viewer_HEADER_FILES
     llcommunicationchannel.h
     llcompilequeue.h
     llconfirmationmanager.h
+    llcontrolavatar.h
     llconversationlog.h
     llconversationloglist.h
     llconversationloglistitem.h
@@ -1220,6 +1223,7 @@ set(viewer_HEADER_FILES
     lltranslate.h
     lltwitterconnect.h
     lluiconstants.h
+    lluiavatar.h
     lluilistener.h
     lluploaddialog.h
     lluploadfloaterobservers.h
diff --git a/indra/newview/VIEWER_VERSION.txt b/indra/newview/VIEWER_VERSION.txt
index 48ea19be07..5fe6072304 100644
--- a/indra/newview/VIEWER_VERSION.txt
+++ b/indra/newview/VIEWER_VERSION.txt
@@ -1 +1 @@
-5.1.10
+6.0.1
diff --git a/indra/newview/app_settings/logcontrol.xml b/indra/newview/app_settings/logcontrol.xml
index 8ced81fdb3..482012cdd6 100644
--- a/indra/newview/app_settings/logcontrol.xml
+++ b/indra/newview/app_settings/logcontrol.xml
@@ -2,6 +2,22 @@
 	<map>
 		<!-- default-level can be ALL, DEBUG, INFO, WARN, ERROR, or NONE -->
 		<key>default-level</key>    <string>INFO</string>
+		<key>print-location</key>   <boolean>false</boolean>
+		<key>log-always-flush</key>   <boolean>true</boolean>
+		<!-- All log types are enabled by default. Can be toggled individually;
+             bitwise-or all the ones you want to enable.
+             Log types and their masks are:
+
+             1  - RecordToSyslog (not used by viewer)
+             2  - RecordToFile (SecondLife.log)
+             4  - RecordToStderr (this will appear in the console window, if there is one)
+             8  - RecordToFixedBuffer (viewer debug console)
+             16 - RecordToWinDebug (on windows, output to VS IDE window)
+
+             For example, value of 10 = 2|8 would enable logging only to SecondLife.log and the viewer debug console.
+             Note: RecordToFile is always enabled in release builds.
+        -->
+		<key>enabled-log-types-mask</key>   <integer>255</integer>
 		<key>settings</key>
 			<array>
 				<!-- Suppress anything but ERROR for some very verbose components -->
@@ -50,6 +66,7 @@
 					<key>tags</key>
 						<array>
 						<!-- sample entry for debugging specific items	
+                             <string>AnimatedObjects</string>
 						     <string>Avatar</string>
 						     <string>Inventory</string>
 						     <string>SceneLoadTiming</string>
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 8e8cce5787..3ad8b6cded 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -2182,6 +2182,94 @@
       <key>Value</key>
       <string />
     </map>
+  <key>DebugAnimatedObjects</key>
+  <map>
+    <key>Comment</key>
+    <string>Show info related to animated objects</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>DebugObjectLODs</key>
+  <map>
+    <key>Comment</key>
+    <string>Show info related to lod calculations for attached or animated objects</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>AnimatedObjectsIgnoreLimits</key>
+  <map>
+    <key>Comment</key>
+    <string>Ignore server-enforced limits on animated objects. This is only useful for server testing.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>AnimatedObjectsAllowLeftClick</key>
+  <map>
+    <key>Comment</key>
+    <string>Allow left-click interaction with animated objects. Uncertain how much performance impact this will have.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>AnimatedObjectsGlobalScale</key>
+  <map>
+    <key>Comment</key>
+    <string>Temporary testing: allow an extra scale factor to be forced on animated objects.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>1.00</real>
+  </map>
+  <key>AnimatedObjectsMaxLegalOffset</key>
+  <map>
+    <key>Comment</key>
+    <string>Max visual offset between object position and rendered position</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>3.0</real>
+  </map>
+  <key>AnimatedObjectsMaxLegalSize</key>
+  <map>
+    <key>Comment</key>
+    <string>Max bounding box size for animated object's rendered position</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>64.0</real>
+  </map>
+  <key>AvatarBoundingBoxComplexity</key>
+  <map>
+    <key>Comment</key>
+    <string>How many aspects to consider for avatar bounding box</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>S32</string>
+    <key>Value</key>
+    <integer>3</integer>
+  </map>
   <key>DebugAvatarAppearanceMessage</key>
   <map>
     <key>Comment</key>
diff --git a/indra/newview/llagent.cpp b/indra/newview/llagent.cpp
index 9b8cc62aa8..ba250fa471 100644
--- a/indra/newview/llagent.cpp
+++ b/indra/newview/llagent.cpp
@@ -881,6 +881,16 @@ void LLAgent::setRegion(LLViewerRegion *regionp)
 			{
 				gSky.mVOGroundp->setRegion(regionp);
 			}
+
+            if (regionp->capabilitiesReceived())
+            {
+                regionp->requestSimulatorFeatures();
+            }
+            else
+            {
+                regionp->setCapabilitiesReceivedCallback(boost::bind(&LLViewerRegion::requestSimulatorFeatures, regionp));
+            }
+
 		}
 		else
 		{
diff --git a/indra/newview/llappearancemgr.cpp b/indra/newview/llappearancemgr.cpp
index c0f88ef704..08daeb0f59 100644
--- a/indra/newview/llappearancemgr.cpp
+++ b/indra/newview/llappearancemgr.cpp
@@ -880,7 +880,10 @@ void LLWearableHoldingPattern::onAllComplete()
 			 ++it)
 		{
 			LLViewerObject *objectp = *it;
-			gAgentAvatarp->addAttachmentOverridesForObject(objectp);
+            if (!objectp->isAnimatedObject())
+            {
+                gAgentAvatarp->addAttachmentOverridesForObject(objectp);
+            }
 		}
 		
 		// Add new attachments to match those requested.
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 189f7c1426..4374caacdf 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -1086,7 +1086,7 @@ bool LLAppViewer::init()
 // don't nag developers who need to run the executable directly
 #if LL_RELEASE_FOR_DOWNLOAD
 	// MAINT-8305: If we're processing a SLURL, skip the launcher check.
-	if (gSavedSettings.getString("CmdLineLoginLocation").empty())
+	if (gSavedSettings.getString("CmdLineLoginLocation").empty() && !beingDebugged())
 	{
 		const char* PARENT = getenv("PARENT");
 		if (! (PARENT && std::string(PARENT) == "SL_Launcher"))
@@ -3918,12 +3918,6 @@ void LLAppViewer::requestQuit()
 		gAgentAvatarp->updateAvatarRezMetrics(true); // force a last packet to be sent.
 	}
 
-	// Try to send last batch of avatar rez metrics.
-	if (!gDisconnected && isAgentAvatarValid())
-	{
-		gAgentAvatarp->updateAvatarRezMetrics(true); // force a last packet to be sent.
-	}
-
 	LLHUDEffectSpiral *effectp = (LLHUDEffectSpiral*)LLHUDManager::getInstance()->createViewerEffect(LLHUDObject::LL_HUD_EFFECT_POINT, TRUE);
 	effectp->setPositionGlobal(gAgent.getPositionGlobal());
 	effectp->setColor(LLColor4U(gAgent.getEffectColor()));
diff --git a/indra/newview/llappviewerwin32.cpp b/indra/newview/llappviewerwin32.cpp
index f0a4a54fbf..3942613ee0 100644
--- a/indra/newview/llappviewerwin32.cpp
+++ b/indra/newview/llappviewerwin32.cpp
@@ -646,6 +646,11 @@ bool LLAppViewerWin32::initParseCommandLine(LLCommandLineParser& clp)
 	return true;
 }
 
+bool LLAppViewerWin32::beingDebugged()
+{
+    return IsDebuggerPresent();
+}
+
 bool LLAppViewerWin32::restoreErrorTrap()
 {	
 	return true;
diff --git a/indra/newview/llappviewerwin32.h b/indra/newview/llappviewerwin32.h
index 59d1ddaa3d..c5fae6a3a3 100644
--- a/indra/newview/llappviewerwin32.h
+++ b/indra/newview/llappviewerwin32.h
@@ -49,6 +49,7 @@ protected:
 	virtual bool initHardwareTest(); // Win32 uses DX9 to test hardware.
 	virtual bool initParseCommandLine(LLCommandLineParser& clp);
 
+	virtual bool beingDebugged();
 	virtual bool restoreErrorTrap();
 	virtual void initCrashReporting(bool reportFreeze); 
 
diff --git a/indra/newview/llavatarrenderinfoaccountant.cpp b/indra/newview/llavatarrenderinfoaccountant.cpp
index 7c7f55f68c..ca83afb5ab 100644
--- a/indra/newview/llavatarrenderinfoaccountant.cpp
+++ b/indra/newview/llavatarrenderinfoaccountant.cpp
@@ -112,8 +112,13 @@ void LLAvatarRenderInfoAccountant::avatarRenderInfoGetCoro(std::string url, U64
                  )
             {
                 LLUUID target_agent_id = LLUUID(agent_iter->first);
-                LLViewerObject* avatarp = gObjectList.findObject(target_agent_id);
-                if (avatarp && avatarp->isAvatar())
+                LLViewerObject* vobjp = gObjectList.findObject(target_agent_id);
+                LLVOAvatar *avatarp = NULL;
+                if (vobjp)
+                {
+                    avatarp = vobjp->asAvatar();
+                }
+                if (avatarp && !avatarp->isControlAvatar())
                 {
                     const LLSD & agent_info_map = agent_iter->second;
                     if (agent_info_map.isMap())
@@ -123,7 +128,7 @@ void LLAvatarRenderInfoAccountant::avatarRenderInfoGetCoro(std::string url, U64
 
                         if (agent_info_map.has(KEY_WEIGHT))
                         {
-                            ((LLVOAvatar *) avatarp)->setReportedVisualComplexity(agent_info_map[KEY_WEIGHT].asInteger());
+                            avatarp->setReportedVisualComplexity(agent_info_map[KEY_WEIGHT].asInteger());
                         }
                     }
                     else
@@ -201,6 +206,7 @@ void LLAvatarRenderInfoAccountant::avatarRenderInfoReportCoro(std::string url, U
         if (avatar &&
             avatar->getRezzedStatus() >= 2 &&					// Mostly rezzed (maybe without baked textures downloaded)
             !avatar->isDead() &&								// Not dead yet
+            !avatar->isControlAvatar() &&						// Not part of an animated object
             avatar->getObjectHost() == regionp->getHost())		// Ensure it's on the same region
         {
             avatar->calculateUpdateRenderComplexity();			// Make sure the numbers are up-to-date
diff --git a/indra/newview/llcontrolavatar.cpp b/indra/newview/llcontrolavatar.cpp
new file mode 100644
index 0000000000..d3fd5813a0
--- /dev/null
+++ b/indra/newview/llcontrolavatar.cpp
@@ -0,0 +1,642 @@
+/**
+ * @file llcontrolavatar.cpp
+ * @brief Implementation for special dummy avatar used to drive rigged meshes.
+ *
+ * $LicenseInfo:firstyear=2017&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2017, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+#include "llcontrolavatar.h"
+#include "llagent.h" //  Get state values from here
+#include "llviewerobjectlist.h"
+#include "pipeline.h"
+#include "llanimationstates.h"
+#include "llviewercontrol.h"
+#include "llmeshrepository.h"
+#include "llviewerregion.h"
+#include "llskinningutil.h"
+
+//#pragma optimize("", off)
+
+const F32 LLControlAvatar::MAX_LEGAL_OFFSET = 3.0f;
+const F32 LLControlAvatar::MAX_LEGAL_SIZE = 64.0f;
+
+//static
+boost::signals2::connection LLControlAvatar::sRegionChangedSlot;
+
+LLControlAvatar::LLControlAvatar(const LLUUID& id, const LLPCode pcode, LLViewerRegion* regionp) :
+    LLVOAvatar(id, pcode, regionp),
+    mPlaying(false),
+    mGlobalScale(1.0f),
+    mMarkedForDeath(false),
+    mRootVolp(NULL),
+    mScaleConstraintFixup(1.0),
+	mRegionChanged(false)
+{
+    mIsDummy = TRUE;
+    mIsControlAvatar = true;
+    mEnableDefaultMotions = false;
+}
+
+// virtual
+LLControlAvatar::~LLControlAvatar()
+{
+}
+
+// virtual
+void LLControlAvatar::initInstance()
+{
+	// Potential optimizations here: avoid creating system
+	// avatar mesh content since it's not used. For now we just clean some
+	// things up after the fact in releaseMeshData().
+    LLVOAvatar::initInstance();
+
+	createDrawable(&gPipeline);
+	updateJointLODs();
+	updateGeometry(mDrawable);
+	hideSkirt();
+
+    mInitFlags |= 1<<4;
+}
+
+void LLControlAvatar::getNewConstraintFixups(LLVector3& new_pos_fixup, F32& new_scale_fixup) const
+{
+
+    F32 max_legal_offset = MAX_LEGAL_OFFSET;
+    if (gSavedSettings.getControl("AnimatedObjectsMaxLegalOffset"))
+    {
+        max_legal_offset = gSavedSettings.getF32("AnimatedObjectsMaxLegalOffset");
+    }
+	max_legal_offset = llmax(max_legal_offset,0.f);
+
+    F32 max_legal_size = MAX_LEGAL_SIZE;
+    if (gSavedSettings.getControl("AnimatedObjectsMaxLegalSize"))
+    {
+        max_legal_size = gSavedSettings.getF32("AnimatedObjectsMaxLegalSize");
+    }
+	max_legal_size = llmax(max_legal_size, 1.f);
+    
+    new_pos_fixup = LLVector3();
+    new_scale_fixup = 1.0f;
+	LLVector3 vol_pos = mRootVolp->getRenderPosition();
+
+    // Fix up position if needed to prevent visual encroachment
+    if (box_valid_and_non_zero(getLastAnimExtents())) // wait for state to settle down
+    {
+        // The goal here is to ensure that the extent of the avatar's 
+        // bounding box does not wander too far from the
+        // official position of the corresponding volume. We
+        // do this by tracking the distance and applying a
+        // correction to the control avatar position if
+        // needed.
+        const LLVector3 *extents = getLastAnimExtents();
+		LLVector3 unshift_extents[2];
+		unshift_extents[0] = extents[0] - mPositionConstraintFixup;
+		unshift_extents[1] = extents[1] - mPositionConstraintFixup;
+        LLVector3 box_dims = extents[1]-extents[0];
+        F32 box_size = llmax(box_dims[0],box_dims[1],box_dims[2]);
+
+		if (!mRootVolp->isAttachment())
+		{
+			LLVector3 pos_box_offset = point_to_box_offset(vol_pos, unshift_extents);
+			F32 offset_dist = pos_box_offset.length();
+			if (offset_dist > max_legal_offset && offset_dist > 0.f)
+			{
+				F32 target_dist = (offset_dist - max_legal_offset);
+				new_pos_fixup = (target_dist/offset_dist)*pos_box_offset;
+			}
+			if (new_pos_fixup != mPositionConstraintFixup)
+			{
+				LL_DEBUGS("ConstraintFix") << getFullname() << " pos fix, offset_dist " << offset_dist << " pos fixup " 
+										   << new_pos_fixup << " was " << mPositionConstraintFixup << LL_ENDL;
+				LL_DEBUGS("ConstraintFix") << "vol_pos " << vol_pos << LL_ENDL;
+				LL_DEBUGS("ConstraintFix") << "extents " << extents[0] << " " << extents[1] << LL_ENDL;
+				LL_DEBUGS("ConstraintFix") << "unshift_extents " << unshift_extents[0] << " " << unshift_extents[1] << LL_ENDL;
+				
+			}
+		}
+        if (box_size/mScaleConstraintFixup > max_legal_size)
+        {
+            new_scale_fixup = mScaleConstraintFixup*max_legal_size/box_size;
+            LL_DEBUGS("ConstraintFix") << getFullname() << " scale fix, box_size " << box_size << " fixup " 
+									   << mScaleConstraintFixup << " max legal " << max_legal_size 
+									   << " -> new scale " << new_scale_fixup << LL_ENDL;
+        }
+    }
+}
+
+void LLControlAvatar::matchVolumeTransform()
+{
+    if (mRootVolp)
+    {
+		LLVector3 new_pos_fixup;
+		F32 new_scale_fixup;
+		if (mRegionChanged)
+		{
+			new_scale_fixup = mScaleConstraintFixup;
+			new_pos_fixup = mPositionConstraintFixup;
+			mRegionChanged = false;
+		}
+		else
+		{
+			getNewConstraintFixups(new_pos_fixup, new_scale_fixup);
+		}
+		mPositionConstraintFixup = new_pos_fixup;
+		mScaleConstraintFixup = new_scale_fixup;
+
+        if (mRootVolp->isAttachment())
+        {
+            LLVOAvatar *attached_av = mRootVolp->getAvatarAncestor();
+            if (attached_av)
+            {
+                LLViewerJointAttachment *attach = attached_av->getTargetAttachmentPoint(mRootVolp);
+                setPositionAgent(mRootVolp->getRenderPosition());
+				attach->updateWorldPRSParent();
+                LLVector3 joint_pos = attach->getWorldPosition();
+                LLQuaternion joint_rot = attach->getWorldRotation();
+                LLVector3 obj_pos = mRootVolp->mDrawable->getPosition();
+                LLQuaternion obj_rot = mRootVolp->mDrawable->getRotation();
+                obj_pos.rotVec(joint_rot);
+                mRoot->setWorldPosition(obj_pos + joint_pos);
+                mRoot->setWorldRotation(obj_rot * joint_rot);
+                setRotation(mRoot->getRotation());
+
+				F32 global_scale = gSavedSettings.getF32("AnimatedObjectsGlobalScale");
+				setGlobalScale(global_scale * mScaleConstraintFixup);
+            }
+            else
+            {
+                LL_WARNS_ONCE() << "can't find attached av!" << LL_ENDL;
+            }
+        }
+        else
+        {
+            LLVector3 vol_pos = mRootVolp->getRenderPosition();
+
+            // FIXME: Currently if you're doing something like playing an
+            // animation that moves the pelvis (on an avatar or
+            // animated object), the name tag and debug text will be
+            // left behind. Ideally setPosition() would follow the
+            // skeleton around in a smarter way, so name tags,
+            // complexity info and such line up better. Should defer
+            // this until avatars also get fixed.
+
+            LLQuaternion obj_rot;
+            if (mRootVolp->mDrawable)
+            {
+                obj_rot = mRootVolp->mDrawable->getRotation();
+            }
+            else
+            {
+                obj_rot = mRootVolp->getRotation();
+            }
+            
+			LLMatrix3 bind_mat;
+
+            LLQuaternion bind_rot;
+#define MATCH_BIND_SHAPE
+#ifdef MATCH_BIND_SHAPE
+            // MAINT-8671 - based on a patch from Beq Janus
+	        const LLMeshSkinInfo* skin_info = mRootVolp->getSkinInfo();
+			if (skin_info)
+			{
+                LL_DEBUGS("BindShape") << getFullname() << " bind shape " << skin_info->mBindShapeMatrix << LL_ENDL;
+                bind_rot = LLSkinningUtil::getUnscaledQuaternion(skin_info->mBindShapeMatrix);
+			}
+#endif
+			setRotation(bind_rot*obj_rot);
+            mRoot->setWorldRotation(bind_rot*obj_rot);
+			setPositionAgent(vol_pos);
+			mRoot->setPosition(vol_pos + mPositionConstraintFixup);
+
+            F32 global_scale = gSavedSettings.getF32("AnimatedObjectsGlobalScale");
+            setGlobalScale(global_scale * mScaleConstraintFixup);
+        }
+    }
+}
+
+void LLControlAvatar::setGlobalScale(F32 scale)
+{
+    if (scale <= 0.0)
+    {
+        LL_WARNS() << "invalid global scale " << scale << LL_ENDL;
+        return;
+    }
+    if (scale != mGlobalScale)
+    {
+        F32 adjust_scale = scale/mGlobalScale;
+        LL_INFOS() << "scale " << scale << " adjustment " << adjust_scale << LL_ENDL;
+        // should we be scaling from the pelvis or the root?
+        recursiveScaleJoint(mPelvisp,adjust_scale);
+        mGlobalScale = scale;
+    }
+}
+
+void LLControlAvatar::recursiveScaleJoint(LLJoint* joint, F32 factor)
+{
+    joint->setScale(factor * joint->getScale());
+    
+	for (LLJoint::child_list_t::iterator iter = joint->mChildren.begin();
+		 iter != joint->mChildren.end(); ++iter)
+	{
+		LLJoint* child = *iter;
+		recursiveScaleJoint(child, factor);
+	}
+}
+
+// Based on LLViewerJointAttachment::setupDrawable(), without the attaching part.
+void LLControlAvatar::updateVolumeGeom()
+{
+	if (!mRootVolp->mDrawable)
+		return;
+	if (mRootVolp->mDrawable->isActive())
+	{
+		mRootVolp->mDrawable->makeStatic(FALSE);
+	}
+	mRootVolp->mDrawable->makeActive();
+	gPipeline.markMoved(mRootVolp->mDrawable);
+	gPipeline.markTextured(mRootVolp->mDrawable); // face may need to change draw pool to/from POOL_HUD
+	mRootVolp->mDrawable->setState(LLDrawable::USE_BACKLIGHT);
+
+	LLViewerObject::const_child_list_t& child_list = mRootVolp->getChildren();
+	for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
+		 iter != child_list.end(); ++iter)
+	{
+		LLViewerObject* childp = *iter;
+		if (childp && childp->mDrawable.notNull())
+		{
+			childp->mDrawable->setState(LLDrawable::USE_BACKLIGHT);
+			gPipeline.markTextured(childp->mDrawable); // face may need to change draw pool to/from POOL_HUD
+			gPipeline.markMoved(childp->mDrawable);
+        }
+    }
+
+    gPipeline.markRebuild(mRootVolp->mDrawable, LLDrawable::REBUILD_ALL, TRUE);
+    mRootVolp->markForUpdate(TRUE);
+
+    // Note that attachment overrides aren't needed here, have already
+    // been applied at the time the mControlAvatar was created, in
+    // llvovolume.cpp.
+
+    matchVolumeTransform();
+
+    // Initial exploration of allowing scaling skeleton to match root
+    // prim bounding box. If enabled, would probably be controlled by
+    // an additional checkbox and default to off. Not enabled for
+    // initial release.
+
+    // What should the scale be? What we really want is the ratio
+    // between the scale at which the object was originally designed
+    // and rigged, and the scale to which it has been subsequently
+    // modified - for example, if the object has been scaled down by a
+    // factor of 2 then we should use 0.5 as the global scale. But we
+    // don't have the original scale stored anywhere, just the current
+    // scale. Possibilities - 1) remember the original scale
+    // somewhere, 2) add another field to let the user specify the
+    // global scale, 3) approximate the original scale by looking at
+    // the proportions of the skeleton after joint positions have
+    // been applied
+    
+    //LLVector3 obj_scale = obj->getScale();
+    //F32 obj_scale_z = llmax(obj_scale[2],0.1f);
+    //setGlobalScale(obj_scale_z/2.0f); // roughly fit avatar height range (2m) into object height
+}
+
+LLControlAvatar *LLControlAvatar::createControlAvatar(LLVOVolume *obj)
+{
+	LLControlAvatar *cav = (LLControlAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion(), CO_FLAG_CONTROL_AVATAR);
+
+    cav->mRootVolp = obj;
+
+    // Sync up position/rotation with object
+    cav->matchVolumeTransform();
+
+    return cav;
+}
+
+void LLControlAvatar::markForDeath()
+{
+    mMarkedForDeath = true;
+}
+
+void LLControlAvatar::idleUpdate(LLAgent &agent, const F64 &time)
+{
+    if (mMarkedForDeath)
+    {
+        markDead();
+        mMarkedForDeath = false;
+    }
+    else
+    {
+        LLVOAvatar::idleUpdate(agent,time);
+    }
+}
+
+BOOL LLControlAvatar::updateCharacter(LLAgent &agent)
+{
+    return LLVOAvatar::updateCharacter(agent);
+}
+
+//virtual
+void LLControlAvatar::updateDebugText()
+{
+	if (gSavedSettings.getBOOL("DebugAnimatedObjects"))
+    {
+        S32 total_linkset_count = 0;
+        if (mRootVolp)
+        {
+            total_linkset_count = 1 + mRootVolp->getChildren().size();
+        }
+        std::vector<LLVOVolume*> volumes;
+        getAnimatedVolumes(volumes);
+        S32 animated_volume_count = volumes.size();
+        std::string active_string;
+        std::string type_string;
+        std::string lod_string;
+        std::string animated_object_flag_string;
+        S32 total_tris = 0;
+        S32 total_verts = 0;
+        F32 est_tris = 0.f;
+        F32 est_streaming_tris = 0.f;
+        F32 streaming_cost = 0.f;
+        std::string cam_dist_string = "";
+        S32 cam_dist_count = 0;
+        F32 lod_radius = mRootVolp->mLODRadius;
+
+        for (std::vector<LLVOVolume*>::iterator it = volumes.begin();
+             it != volumes.end(); ++it)
+        {
+            LLVOVolume *volp = *it;
+            S32 verts = 0;
+            total_tris += volp->getTriangleCount(&verts);
+            total_verts += verts;
+            est_tris += volp->getEstTrianglesMax();
+            est_streaming_tris += volp->getEstTrianglesStreamingCost();
+            streaming_cost += volp->getStreamingCost();
+            lod_string += llformat("%d",volp->getLOD());
+            if (volp && volp->mDrawable)
+            {
+                bool is_animated_flag = volp->getExtendedMeshFlags() & LLExtendedMeshParams::ANIMATED_MESH_ENABLED_FLAG;
+                if (is_animated_flag)
+                {
+                    animated_object_flag_string += "1";
+                }
+                else
+                {
+                    animated_object_flag_string += "0";
+                }
+                if (volp->mDrawable->isActive())
+                {
+                    active_string += "A";
+                }
+                else
+                {
+                    active_string += "S";
+                }
+                if (volp->isRiggedMesh())
+                {
+                    // Rigged/animatable mesh
+                    type_string += "R";
+                    lod_radius = volp->mLODRadius;
+                }
+                else if (volp->isMesh())
+                {
+                    // Static mesh
+                    type_string += "M";
+                }
+                else
+                {
+                    // Any other prim
+                    type_string += "P";
+                }
+                if (cam_dist_count < 4)
+                {
+                    cam_dist_string += LLStringOps::getReadableNumber(volp->mLODDistance) + "/" +
+                        LLStringOps::getReadableNumber(volp->mLODAdjustedDistance) + " ";
+                    cam_dist_count++;
+                }
+            }
+            else
+            {
+                active_string += "-";
+                type_string += "-";
+            }
+        }
+        addDebugText(llformat("CAV obj %d anim %d active %s impost %d upprd %d strcst %f",
+                              total_linkset_count, animated_volume_count, 
+                              active_string.c_str(), (S32) isImpostor(), getUpdatePeriod(), streaming_cost));
+        addDebugText(llformat("types %s lods %s", type_string.c_str(), lod_string.c_str()));
+        addDebugText(llformat("flags %s", animated_object_flag_string.c_str()));
+        addDebugText(llformat("tris %d (est %.1f, streaming %.1f), verts %d", total_tris, est_tris, est_streaming_tris, total_verts));
+        addDebugText(llformat("pxarea %s rank %d", LLStringOps::getReadableNumber(getPixelArea()).c_str(), getVisibilityRank()));
+        addDebugText(llformat("lod_radius %s dists %s", LLStringOps::getReadableNumber(lod_radius).c_str(),cam_dist_string.c_str()));
+        if (mPositionConstraintFixup.length() > 0.0f || mScaleConstraintFixup != 1.0f)
+        {
+            addDebugText(llformat("pos fix (%.1f %.1f %.1f) scale %f", 
+                                  mPositionConstraintFixup[0], 
+                                  mPositionConstraintFixup[1],
+                                  mPositionConstraintFixup[2],
+                                  mScaleConstraintFixup));
+        }
+        
+#if 0
+        std::string region_name = "no region";
+        if (mRootVolp->getRegion())
+        {
+            region_name = mRootVolp->getRegion()->getName();
+        }
+        std::string skel_region_name = "skel no region";
+        if (getRegion())
+        {
+            skel_region_name = getRegion()->getName();
+        }
+        addDebugText(llformat("region %x %s skel %x %s",
+                              mRootVolp->getRegion(), region_name.c_str(),
+                              getRegion(), skel_region_name.c_str()));
+#endif
+        
+    }
+    LLVOAvatar::updateDebugText();
+}
+
+void LLControlAvatar::getAnimatedVolumes(std::vector<LLVOVolume*>& volumes)
+{
+    if (!mRootVolp)
+    {
+        return;
+    }
+
+    volumes.push_back(mRootVolp);
+    
+	LLViewerObject::const_child_list_t& child_list = mRootVolp->getChildren();
+	for (LLViewerObject::const_child_list_t::const_iterator iter = child_list.begin();
+		 iter != child_list.end(); ++iter)
+	{
+		LLViewerObject* childp = *iter;
+        LLVOVolume *child_volp = dynamic_cast<LLVOVolume*>(childp);
+        if (child_volp && child_volp->isAnimatedObject())
+        {
+            volumes.push_back(child_volp);
+        }
+    }
+}
+
+// This is called after an associated object receives an animation
+// message. Combine the signaled animations for all associated objects
+// and process any resulting state changes.
+void LLControlAvatar::updateAnimations()
+{
+    if (!mRootVolp)
+    {
+        LL_WARNS_ONCE("AnimatedObjectsNotify") << "No root vol" << LL_ENDL;
+        return;
+    }
+
+    std::vector<LLVOVolume*> volumes;
+    getAnimatedVolumes(volumes);
+    
+    // Rebuild mSignaledAnimations from the associated volumes.
+	std::map<LLUUID, S32> anims;
+    for (std::vector<LLVOVolume*>::iterator vol_it = volumes.begin(); vol_it != volumes.end(); ++vol_it)
+    {
+        LLVOVolume *volp = *vol_it;
+        //LL_INFOS("AnimatedObjects") << "updating anim for vol " << volp->getID() << " root " << mRootVolp->getID() << LL_ENDL;
+        signaled_animation_map_t& signaled_animations = LLObjectSignaledAnimationMap::instance().getMap()[volp->getID()];
+        for (std::map<LLUUID,S32>::iterator anim_it = signaled_animations.begin();
+             anim_it != signaled_animations.end();
+             ++anim_it)
+        {
+            std::map<LLUUID,S32>::iterator found_anim_it = anims.find(anim_it->first);
+            if (found_anim_it != anims.end())
+            {
+                // Animation already present, use the larger sequence id
+                anims[anim_it->first] = llmax(found_anim_it->second, anim_it->second);
+            }
+            else
+            {
+                // Animation not already present, use this sequence id.
+                anims[anim_it->first] = anim_it->second;
+            }
+            LL_DEBUGS("AnimatedObjectsNotify") << "found anim for vol " << volp->getID() << " anim " << anim_it->first << " root " << mRootVolp->getID() << LL_ENDL;
+        }
+    }
+    if (!mPlaying)
+    {
+        mPlaying = true;
+        //if (!mRootVolp->isAnySelected())
+        {
+            updateVolumeGeom();
+            mRootVolp->recursiveMarkForUpdate(TRUE);
+        }
+    }
+
+    mSignaledAnimations = anims;
+    processAnimationStateChanges();
+}
+
+// virtual
+LLViewerObject* LLControlAvatar::lineSegmentIntersectRiggedAttachments(const LLVector4a& start, const LLVector4a& end,
+									  S32 face,
+									  BOOL pick_transparent,
+									  BOOL pick_rigged,
+									  S32* face_hit,
+									  LLVector4a* intersection,
+									  LLVector2* tex_coord,
+									  LLVector4a* normal,
+									  LLVector4a* tangent)
+{
+	LLViewerObject* hit = NULL;
+
+	if (lineSegmentBoundingBox(start, end))
+	{
+		LLVector4a local_end = end;
+		LLVector4a local_intersection;
+
+        if (mRootVolp &&
+            mRootVolp->lineSegmentIntersect(start, local_end, face, pick_transparent, pick_rigged, face_hit, &local_intersection, tex_coord, normal, tangent))
+        {
+            local_end = local_intersection;
+            if (intersection)
+            {
+                *intersection = local_intersection;
+            }
+			
+            hit = mRootVolp;
+        }
+	}
+		
+	return hit;
+}
+
+// virtual
+std::string LLControlAvatar::getFullname() const
+{
+    if (mRootVolp)
+    {
+        return "AO_" + mRootVolp->getID().getString();
+    }
+    else
+    {
+        return "AO_no_root_vol";
+    }
+}
+
+// virtual
+bool LLControlAvatar::shouldRenderRigged() const
+{
+    if (mRootVolp && mRootVolp->isAttachment())
+    {
+        LLVOAvatar *attached_av = mRootVolp->getAvatarAncestor();
+        if (attached_av)
+        {
+            return attached_av->shouldRenderRigged();
+        }
+    }
+    return true;
+}
+
+// virtual
+BOOL LLControlAvatar::isImpostor()
+{
+    if (mRootVolp && mRootVolp->isAttachment())
+    {
+		// Attached animated objects should match state of their attached av.
+        LLVOAvatar *attached_av = mRootVolp->getAvatarAncestor();
+		if (attached_av)
+		{
+			return attached_av->isImpostor();
+		}
+    }
+	return LLVOAvatar::isImpostor();
+}
+
+//static
+void LLControlAvatar::onRegionChanged()
+{
+	std::vector<LLCharacter*>::iterator it = LLCharacter::sInstances.begin();
+	for ( ; it != LLCharacter::sInstances.end(); ++it)
+	{
+		LLControlAvatar* cav = dynamic_cast<LLControlAvatar*>(*it);
+		if (!cav) continue;
+		cav->mRegionChanged = true;
+	}
+}
diff --git a/indra/newview/llcontrolavatar.h b/indra/newview/llcontrolavatar.h
new file mode 100644
index 0000000000..288d07cd48
--- /dev/null
+++ b/indra/newview/llcontrolavatar.h
@@ -0,0 +1,113 @@
+/**
+ * @file llcontrolavatar.h
+ * @brief Special dummy avatar used to drive rigged meshes.
+ *
+ * $LicenseInfo:firstyear=2017&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2017, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_CONTROLAVATAR_H
+#define LL_CONTROLAVATAR_H
+
+#include "llvoavatar.h"
+#include "llvovolume.h"
+
+class LLControlAvatar:
+    public LLVOAvatar
+{
+    LOG_CLASS(LLControlAvatar);
+
+public:
+    LLControlAvatar(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
+	virtual void 			initInstance(); // Called after construction to initialize the class.
+	virtual	~LLControlAvatar();
+
+    void getNewConstraintFixups(LLVector3& new_pos_constraint, F32& new_scale_constraint) const;
+    void matchVolumeTransform();
+    void updateVolumeGeom();
+
+    void setGlobalScale(F32 scale);
+    void recursiveScaleJoint(LLJoint *joint, F32 factor);
+    static LLControlAvatar *createControlAvatar(LLVOVolume *obj);
+
+    // Delayed kill so we don't make graphics pipeline unhappy calling
+    // markDead() inside other graphics pipeline operations.
+    void markForDeath();
+
+    virtual void idleUpdate(LLAgent &agent, const F64 &time);
+	virtual BOOL updateCharacter(LLAgent &agent);
+
+    void getAnimatedVolumes(std::vector<LLVOVolume*>& volumes);
+    void updateAnimations();  
+    
+	virtual LLViewerObject*	lineSegmentIntersectRiggedAttachments(
+        const LLVector4a& start, const LLVector4a& end,
+        S32 face = -1,                    // which face to check, -1 = ALL_SIDES
+        BOOL pick_transparent = FALSE,
+        BOOL pick_rigged = FALSE,
+        S32* face_hit = NULL,             // which face was hit
+        LLVector4a* intersection = NULL,   // return the intersection point
+        LLVector2* tex_coord = NULL,      // return the texture coordinates of the intersection point
+        LLVector4a* normal = NULL,         // return the surface normal at the intersection point
+        LLVector4a* tangent = NULL);     // return the surface tangent at the intersection point
+
+	virtual void	updateDebugText();
+
+    virtual std::string getFullname() const;
+
+    virtual bool shouldRenderRigged() const;
+
+	virtual BOOL isImpostor(); 
+    
+    bool mPlaying;
+
+    F32 mGlobalScale;
+
+    LLVOVolume *mRootVolp;
+
+    bool mMarkedForDeath;
+
+    LLVector3 mPositionConstraintFixup;
+    F32 mScaleConstraintFixup;
+
+    static const F32 MAX_LEGAL_OFFSET;
+    static const F32 MAX_LEGAL_SIZE;
+
+	static void onRegionChanged();
+	bool mRegionChanged;
+	static boost::signals2::connection sRegionChangedSlot;
+};
+
+typedef std::map<LLUUID, S32> signaled_animation_map_t;
+typedef std::map<LLUUID, signaled_animation_map_t> object_signaled_animation_map_t;
+
+// Stores information about previously requested animations, by object id.
+class LLObjectSignaledAnimationMap: public LLSingleton<LLObjectSignaledAnimationMap>
+{
+    LLSINGLETON_EMPTY_CTOR(LLObjectSignaledAnimationMap); 
+
+public:
+    object_signaled_animation_map_t mMap;
+
+    object_signaled_animation_map_t& getMap() { return mMap; }
+};
+
+#endif //LL_CONTROLAVATAR_H
diff --git a/indra/newview/lldrawable.cpp b/indra/newview/lldrawable.cpp
index 6ca8f1ae9c..8c6cbc020b 100644
--- a/indra/newview/lldrawable.cpp
+++ b/indra/newview/lldrawable.cpp
@@ -32,6 +32,7 @@
 #include "material_codes.h"
 
 // viewer includes
+#include "llagent.h"
 #include "llcriticaldamp.h"
 #include "llface.h"
 #include "lllightconstants.h"
@@ -50,6 +51,7 @@
 #include "llviewerobjectlist.h"
 #include "llviewerwindow.h"
 #include "llvocache.h"
+#include "llcontrolavatar.h"
 #include "lldrawpoolavatar.h"
 
 const F32 MIN_INTERPOLATE_DISTANCE_SQUARED = 0.001f * 0.001f;
@@ -573,7 +575,8 @@ void LLDrawable::makeStatic(BOOL warning_enabled)
 	if (isState(ACTIVE) && 
 		!isState(ACTIVE_CHILD) && 
 		!mVObjp->isAttachment() && 
-		!mVObjp->isFlexible())
+		!mVObjp->isFlexible() &&
+        !mVObjp->isAnimatedObject())
 	{
 		clearState(ACTIVE | ANIMATED_CHILD);
 
@@ -726,6 +729,10 @@ F32 LLDrawable::updateXform(BOOL undamped)
 	mXform.setRotation(target_rot);
 	mXform.setScale(LLVector3(1,1,1)); //no scale in drawable transforms (IT'S A RULE!)
 	mXform.updateMatrix();
+    if (isRoot() && mVObjp->isAnimatedObject() && mVObjp->getControlAvatar())
+    {
+        mVObjp->getControlAvatar()->matchVolumeTransform();
+    }
 
 	if (mSpatialBridge)
 	{
@@ -897,6 +904,30 @@ void LLDrawable::updateDistance(LLCamera& camera, bool force_update)
 					}
 				}
 			}	
+
+
+            // MAINT-7926 Handle volumes in an animated object as a special case
+            // SL-937: add dynamic box handling for rigged mesh on regular avatars.
+            //if (volume->getAvatar() && volume->getAvatar()->isControlAvatar())
+            if (volume->getAvatar())
+            {
+                const LLVector3* av_box = volume->getAvatar()->getLastAnimExtents();
+                LLVector3d cam_pos = gAgent.getPosGlobalFromAgent(LLViewerCamera::getInstance()->getOrigin());
+                LLVector3 cam_region_pos = LLVector3(cam_pos - volume->getRegion()->getOriginGlobal());
+                
+                LLVector3 cam_to_box_offset = point_to_box_offset(cam_region_pos, av_box);
+                mDistanceWRTCamera = llmax(0.01f, ll_round(cam_to_box_offset.magVec(), 0.01f));
+                LL_DEBUGS("DynamicBox") << volume->getAvatar()->getFullname() 
+                                        << " pos (ignored) " << pos
+                                        << " cam pos " << cam_pos
+                                        << " cam region pos " << cam_region_pos
+                                        << " box " << av_box[0] << "," << av_box[1] 
+                                        << " -> dist " << mDistanceWRTCamera
+                                        << LL_ENDL;
+                mVObjp->updateLOD();
+                return;
+            }
+            
 		}
 		else
 		{
@@ -1113,7 +1144,8 @@ void LLDrawable::setGroup(LLViewerOctreeGroup *groupp)
 	llassert(!groupp || (LLSpatialGroup*)groupp->hasElement(this));
 
 	if (cur_groupp != groupp && getVOVolume())
-	{ //NULL out vertex buffer references for volumes on spatial group change to maintain
+	{
+		//NULL out vertex buffer references for volumes on spatial group change to maintain
 		//requirement that every face vertex buffer is either NULL or points to a vertex buffer
 		//contained by its drawable's spatial group
 		for (S32 i = 0; i < getNumFaces(); ++i)
diff --git a/indra/newview/lldrawpool.cpp b/indra/newview/lldrawpool.cpp
index 075375082d..82888b2df6 100644
--- a/indra/newview/lldrawpool.cpp
+++ b/indra/newview/lldrawpool.cpp
@@ -141,7 +141,7 @@ LLViewerTexture *LLDrawPool::getDebugTexture()
 	return NULL;
 }
 
-//virtual
+//virtuals
 void LLDrawPool::beginRenderPass( S32 pass )
 {
 }
diff --git a/indra/newview/lldrawpoolavatar.cpp b/indra/newview/lldrawpoolavatar.cpp
index ef69990170..d5e86143f1 100644
--- a/indra/newview/lldrawpoolavatar.cpp
+++ b/indra/newview/lldrawpoolavatar.cpp
@@ -109,6 +109,32 @@ LLDrawPoolAvatar::LLDrawPoolAvatar() :
 {
 }
 
+LLDrawPoolAvatar::~LLDrawPoolAvatar()
+{
+    if (!isDead())
+    {
+        LL_WARNS() << "Destroying avatar drawpool that still contains faces" << LL_ENDL;
+    }
+}
+
+// virtual
+BOOL LLDrawPoolAvatar::isDead()
+{
+    if (!LLFacePool::isDead())
+    {
+        return FALSE;
+    }
+    
+	for (U32 i = 0; i < NUM_RIGGED_PASSES; ++i)
+    {
+        if (mRiggedFace[i].size() > 0)
+        {
+            return FALSE;
+        }
+    }
+    return TRUE;
+}
+ 
 //-----------------------------------------------------------------------------
 // instancePool()
 //-----------------------------------------------------------------------------
@@ -467,7 +493,7 @@ void LLDrawPoolAvatar::renderShadow(S32 pass)
 	}
 	LLVOAvatar *avatarp = (LLVOAvatar *)facep->getDrawable()->getVObj().get();
 
-	if (avatarp->isDead() || avatarp->mIsDummy || avatarp->mDrawable.isNull())
+	if (avatarp->isDead() || avatarp->isUIAvatar() || avatarp->mDrawable.isNull())
 	{
 		return;
 	}
@@ -1683,7 +1709,7 @@ void LLDrawPoolAvatar::updateRiggedFaceVertexBuffer(
 
 void LLDrawPoolAvatar::renderRigged(LLVOAvatar* avatar, U32 type, bool glow)
 {
-	if (avatar->isSelf() && !gAgent.needsRenderAvatar())
+	if (!avatar->shouldRenderRigged())
 	{
 		return;
 	}
@@ -1714,13 +1740,7 @@ void LLDrawPoolAvatar::renderRigged(LLVOAvatar* avatar, U32 type, bool glow)
 			continue;
 		}
 
-		LLUUID mesh_id = volume->getParams().getSculptID();
-		if (mesh_id.isNull())
-		{
-			continue;
-		}
-
-		const LLMeshSkinInfo* skin = gMeshRepo.getSkinInfo(mesh_id, vobj);
+		const LLMeshSkinInfo* skin = vobj->getSkinInfo();
 		if (!skin)
 		{
 			continue;
@@ -1934,13 +1954,7 @@ void LLDrawPoolAvatar::updateRiggedVertexBuffers(LLVOAvatar* avatar)
 				continue;
 			}
 
-			LLUUID mesh_id = volume->getParams().getSculptID();
-			if (mesh_id.isNull())
-			{
-				continue;
-			}
-
-			const LLMeshSkinInfo* skin = gMeshRepo.getSkinInfo(mesh_id, vobj);
+			const LLMeshSkinInfo* skin = vobj->getSkinInfo();
 			if (!skin)
 			{
 				continue;
@@ -2061,11 +2075,16 @@ LLColor3 LLDrawPoolAvatar::getDebugColor() const
 
 void LLDrawPoolAvatar::addRiggedFace(LLFace* facep, U32 type)
 {
+    llassert (facep->isState(LLFace::RIGGED));
+    llassert(getType() == LLDrawPool::POOL_AVATAR);
+    if (facep->getPool() && facep->getPool() != this)
+    {
+        LL_ERRS() << "adding rigged face that's already in another pool" << LL_ENDL;
+    }
 	if (type >= NUM_RIGGED_PASSES)
 	{
 		LL_ERRS() << "Invalid rigged face type." << LL_ENDL;
 	}
-
 	if (facep->getRiggedIndex(type) != -1)
 	{
 		LL_ERRS() << "Tried to add a rigged face that's referenced elsewhere." << LL_ENDL;
@@ -2078,6 +2097,12 @@ void LLDrawPoolAvatar::addRiggedFace(LLFace* facep, U32 type)
 
 void LLDrawPoolAvatar::removeRiggedFace(LLFace* facep)
 {
+    llassert (facep->isState(LLFace::RIGGED));
+    llassert(getType() == LLDrawPool::POOL_AVATAR);
+    if (facep->getPool() != this)
+    {
+        LL_ERRS() << "Tried to remove a rigged face from the wrong pool" << LL_ENDL;
+    }
 	facep->setPool(NULL);
 
 	for (U32 i = 0; i < NUM_RIGGED_PASSES; ++i)
diff --git a/indra/newview/lldrawpoolavatar.h b/indra/newview/lldrawpoolavatar.h
index b9d2204052..45b6d71110 100644
--- a/indra/newview/lldrawpoolavatar.h
+++ b/indra/newview/lldrawpoolavatar.h
@@ -60,6 +60,8 @@ public:
 	virtual S32 getVertexShaderLevel() const;
 
 	LLDrawPoolAvatar();
+    ~LLDrawPoolAvatar();
+    /*virtual*/ BOOL isDead();
 
 	static LLMatrix4& getModelView();
 
diff --git a/indra/newview/llface.cpp b/indra/newview/llface.cpp
index 06f64b7597..4f18cda92f 100644
--- a/indra/newview/llface.cpp
+++ b/indra/newview/llface.cpp
@@ -331,11 +331,7 @@ void LLFace::dirtyTexture()
 				{
 					vobj->mLODChanged = TRUE;
 
-					LLVOAvatar* avatar = vobj->getAvatar();
-					if (avatar)
-					{ //avatar render cost may have changed
-						avatar->updateVisualComplexity();
-					}
+                    vobj->updateVisualComplexity();
 				}
 				gPipeline.markRebuild(drawablep, LLDrawable::REBUILD_VOLUME, FALSE);
 			}
@@ -815,17 +811,11 @@ bool less_than_max_mag(const LLVector4a& vec)
 }
 
 BOOL LLFace::genVolumeBBoxes(const LLVolume &volume, S32 f,
-								const LLMatrix4& mat_vert_in, BOOL global_volume)
+                             const LLMatrix4& mat_vert_in, BOOL global_volume)
 {
 	//get bounding box
 	if (mDrawablep->isState(LLDrawable::REBUILD_VOLUME | LLDrawable::REBUILD_POSITION | LLDrawable::REBUILD_RIGGED))
 	{
-		//VECTORIZE THIS
-		LLMatrix4a mat_vert;
-		mat_vert.loadu(mat_vert_in);
-
-		LLVector4a min,max;
-	
 		if (f >= volume.getNumVolumeFaces())
 		{
 			LL_WARNS() << "Generating bounding box for invalid face index!" << LL_ENDL;
@@ -833,77 +823,52 @@ BOOL LLFace::genVolumeBBoxes(const LLVolume &volume, S32 f,
 		}
 
 		const LLVolumeFace &face = volume.getVolumeFace(f);
-		min = face.mExtents[0];
-		max = face.mExtents[1];
 		
-		llassert(less_than_max_mag(min));
-		llassert(less_than_max_mag(max));
-
-		//min, max are in volume space, convert to drawable render space
-
-		//get 8 corners of bounding box
-		LLVector4Logical mask[6];
-
-		for (U32 i = 0; i < 6; ++i)
-		{
-			mask[i].clear();
-		}
-
-		mask[0].setElement<2>(); //001
-		mask[1].setElement<1>(); //010
-		mask[2].setElement<1>(); //011
-		mask[2].setElement<2>();
-		mask[3].setElement<0>(); //100
-		mask[4].setElement<0>(); //101
-		mask[4].setElement<2>();
-		mask[5].setElement<0>(); //110
-		mask[5].setElement<1>();
-
-		LLVector4a v[8];
-
-		v[6] = min;
-		v[7] = max;
-
-		for (U32 i = 0; i < 6; ++i)
-		{
-			v[i].setSelectWithMask(mask[i], min, max);
-		}
-
-		LLVector4a tv[8];
+        LL_DEBUGS("RiggedBox") << "updating extents for face " << f 
+                               << " starting extents " << mExtents[0] << ", " << mExtents[1] 
+                               << " starting vf extents " << face.mExtents[0] << ", " << face.mExtents[1] 
+                               << " num verts " << face.mNumVertices << LL_ENDL;
+
+        // MAINT-8264 - stray vertices, especially in low LODs, cause bounding box errors.
+		if (face.mNumVertices < 3) 
+        {
+            LL_DEBUGS("RiggedBox") << "skipping face " << f << ", bad num vertices " 
+                                   << face.mNumVertices << " " << face.mNumIndices << " " << face.mWeights << LL_ENDL;
+            return FALSE;
+        }
+        
+		//VECTORIZE THIS
+		LLMatrix4a mat_vert;
+		mat_vert.loadu(mat_vert_in);
+        LLVector4a new_extents[2];
 
-		//transform bounding box into drawable space
-		for (U32 i = 0; i < 8; ++i)
-		{
-			mat_vert.affineTransform(v[i], tv[i]);
-		}
-	
-		//find bounding box
-		LLVector4a& newMin = mExtents[0];
-		LLVector4a& newMax = mExtents[1];
+		llassert(less_than_max_mag(face.mExtents[0]));
+		llassert(less_than_max_mag(face.mExtents[1]));
 
-		newMin = newMax = tv[0];
+		matMulBoundBox(mat_vert, face.mExtents, mExtents);
 
-		for (U32 i = 1; i < 8; ++i)
-		{
-			newMin.setMin(newMin, tv[i]);
-			newMax.setMax(newMax, tv[i]);
-		}
+        LL_DEBUGS("RiggedBox") << "updated extents for face " << f 
+                               << " bbox gave extents " << mExtents[0] << ", " << mExtents[1] << LL_ENDL;
 
 		if (!mDrawablep->isActive())
 		{	// Shift position for region
 			LLVector4a offset;
 			offset.load3(mDrawablep->getRegion()->getOriginAgent().mV);
-			newMin.add(offset);
-			newMax.add(offset);
+			mExtents[0].add(offset);
+			mExtents[1].add(offset);
+            LL_DEBUGS("RiggedBox") << "updating extents for face " << f 
+                                   << " not active, added offset " << offset << LL_ENDL;
 		}
 
+        LL_DEBUGS("RiggedBox") << "updated extents for face " << f 
+                               << " to " << mExtents[0] << ", " << mExtents[1] << LL_ENDL;
 		LLVector4a t;
-		t.setAdd(newMin,newMax);
+		t.setAdd(mExtents[0],mExtents[1]);
 		t.mul(0.5f);
 
 		mCenterLocal.set(t.getF32ptr());
 
-		t.setSub(newMax,newMin);
+		t.setSub(mExtents[1],mExtents[0]);
 		mBoundingSphereRadius = t.getLength3().getF32()*0.5f;
 
 		updateCenterAgent();
diff --git a/indra/newview/llfloaterbvhpreview.cpp b/indra/newview/llfloaterbvhpreview.cpp
index ae7620f2c7..080d0ed8ea 100644
--- a/indra/newview/llfloaterbvhpreview.cpp
+++ b/indra/newview/llfloaterbvhpreview.cpp
@@ -1042,14 +1042,8 @@ LLPreviewAnimation::LLPreviewAnimation(S32 width, S32 height) : LLViewerDynamicT
 	mCameraPitch = 0.f;
 	mCameraZoom = 1.f;
 
-	mDummyAvatar = (LLVOAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion());
-	mDummyAvatar->createDrawable(&gPipeline);
-	mDummyAvatar->mIsDummy = TRUE;
+	mDummyAvatar = (LLVOAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion(), LLViewerObject::CO_FLAG_UI_AVATAR);
 	mDummyAvatar->mSpecialRenderMode = 1;
-	mDummyAvatar->setPositionAgent(LLVector3::zero);
-	mDummyAvatar->slamPosition();
-	mDummyAvatar->updateJointLODs();
-	mDummyAvatar->updateGeometry(mDummyAvatar->mDrawable);
 	mDummyAvatar->startMotion(ANIM_AGENT_STAND, BASE_ANIM_TIME_OFFSET);
 	mDummyAvatar->hideSkirt();
 
diff --git a/indra/newview/llfloaterimagepreview.cpp b/indra/newview/llfloaterimagepreview.cpp
index 0c2bb25e07..3c428a70f3 100644
--- a/indra/newview/llfloaterimagepreview.cpp
+++ b/indra/newview/llfloaterimagepreview.cpp
@@ -566,15 +566,8 @@ LLImagePreviewAvatar::LLImagePreviewAvatar(S32 width, S32 height) : LLViewerDyna
 	mCameraPitch = 0.f;
 	mCameraZoom = 1.f;
 
-	mDummyAvatar = (LLVOAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion());
-	mDummyAvatar->createDrawable(&gPipeline);
-	mDummyAvatar->mIsDummy = TRUE;
+	mDummyAvatar = (LLVOAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion(), LLViewerObject::CO_FLAG_UI_AVATAR);
 	mDummyAvatar->mSpecialRenderMode = 2;
-	mDummyAvatar->setPositionAgent(LLVector3::zero);
-	mDummyAvatar->slamPosition();
-	mDummyAvatar->updateJointLODs();
-	mDummyAvatar->updateGeometry(mDummyAvatar->mDrawable);
-	// gPipeline.markVisible(mDummyAvatar->mDrawable, *LLViewerCamera::getInstance());
 
 	mTextureName = 0;
 }
diff --git a/indra/newview/llfloatermodelpreview.cpp b/indra/newview/llfloatermodelpreview.cpp
index 7a2ab37a0d..268c646719 100644
--- a/indra/newview/llfloatermodelpreview.cpp
+++ b/indra/newview/llfloatermodelpreview.cpp
@@ -685,6 +685,11 @@ void LLFloaterModelPreview::draw()
 			childSetTextArg("status", "[STATUS]", getString("status_parse_error"));
 			toggleCalculateButton(false);
 		}
+        else
+        if (mModelPreview->getLoadState() == LLModelLoader::WARNING_BIND_SHAPE_ORIENTATION)
+        {
+			childSetTextArg("status", "[STATUS]", getString("status_bind_shape_orientation"));
+        }
 		else
 		{
 			childSetTextArg("status", "[STATUS]", getString("status_idle"));
@@ -1368,7 +1373,11 @@ U32 LLModelPreview::calcResourceCost()
 
 			F32 radius = scale.length()*0.5f*debug_scale;
 
-			streaming_cost += LLMeshRepository::getStreamingCost(ret, radius);
+            LLMeshCostData costs;
+            if (gMeshRepo.getCostData(ret, costs))
+            {
+                streaming_cost += costs.getRadiusBasedStreamingCost(radius);
+            }
 		}
 	}
 
@@ -1618,6 +1627,19 @@ void LLModelPreview::rebuildUploadData()
 						mFMP->childDisable( "calculate_btn" );
 					}
 				}
+                LLFloaterModelPreview* fmp = (LLFloaterModelPreview*) mFMP;
+                bool upload_skinweights = fmp && fmp->childGetValue("upload_skin").asBoolean();
+                if (upload_skinweights && high_lod_model->mSkinInfo.mJointNames.size() > 0)
+                {
+                    LLQuaternion bind_rot = LLSkinningUtil::getUnscaledQuaternion(high_lod_model->mSkinInfo.mBindShapeMatrix);
+                    LLQuaternion identity;
+                    if (!bind_rot.isEqualEps(identity,0.01))
+                    {
+                        LL_WARNS() << "non-identity bind shape rot. mat is " << high_lod_model->mSkinInfo.mBindShapeMatrix 
+                                   << " bind_rot " << bind_rot << LL_ENDL;
+                        setLoadState( LLModelLoader::WARNING_BIND_SHAPE_ORIENTATION );
+                    }
+                }
 			}
 			instance.mTransform = mat;
 			mUploadData.push_back(instance);
@@ -1763,9 +1785,17 @@ void LLModelPreview::getJointAliases( JointMap& joint_map)
     //Joint names and aliases come from avatar_skeleton.xml
     
     joint_map = av->getJointAliases();
-    for (S32 i = 0; i < av->mNumCollisionVolumes; i++)
+
+    std::vector<std::string> cv_names, attach_names;
+    av->getSortedJointNames(1, cv_names);
+    av->getSortedJointNames(2, attach_names);
+    for (std::vector<std::string>::iterator it = cv_names.begin(); it != cv_names.end(); ++it)
+    {
+        joint_map[*it] = *it;
+    }
+    for (std::vector<std::string>::iterator it = attach_names.begin(); it != attach_names.end(); ++it)
     {
-        joint_map[av->mCollisionVolumes[i].getName()] = av->mCollisionVolumes[i].getName();
+        joint_map[*it] = *it;
     }
 }
 
@@ -3451,16 +3481,11 @@ void LLModelPreview::update()
 //-----------------------------------------------------------------------------
 void LLModelPreview::createPreviewAvatar( void )
 {
-	mPreviewAvatar = (LLVOAvatar*)gObjectList.createObjectViewer( LL_PCODE_LEGACY_AVATAR, gAgent.getRegion() );
+	mPreviewAvatar = (LLVOAvatar*)gObjectList.createObjectViewer( LL_PCODE_LEGACY_AVATAR, gAgent.getRegion(), LLViewerObject::CO_FLAG_UI_AVATAR );
 	if ( mPreviewAvatar )
 	{
 		mPreviewAvatar->createDrawable( &gPipeline );
-		mPreviewAvatar->mIsDummy = TRUE;
 		mPreviewAvatar->mSpecialRenderMode = 1;
-		mPreviewAvatar->setPositionAgent( LLVector3::zero );
-		mPreviewAvatar->slamPosition();
-		mPreviewAvatar->updateJointLODs();
-		mPreviewAvatar->updateGeometry( mPreviewAvatar->mDrawable );
 		mPreviewAvatar->startMotion( ANIM_AGENT_STAND );
 		mPreviewAvatar->hideSkirt();
 	}
diff --git a/indra/newview/llfloatermodelpreview.h b/indra/newview/llfloatermodelpreview.h
index 53b03c6069..7ec6a58ac7 100644
--- a/indra/newview/llfloatermodelpreview.h
+++ b/indra/newview/llfloatermodelpreview.h
@@ -169,7 +169,10 @@ protected:
 	void			draw();
 	
 	void initDecompControls();
-	
+
+    // FIXME - this function and mStatusMessage have no visible effect, and the
+    // actual status messages are managed by directly manipulation of
+    // the UI element.
 	void setStatusMessage(const std::string& msg);
 
 	LLModelPreview*	mModelPreview;
diff --git a/indra/newview/llmeshrepository.cpp b/indra/newview/llmeshrepository.cpp
index 2c1980922a..e38bd8846d 100644
--- a/indra/newview/llmeshrepository.cpp
+++ b/indra/newview/llmeshrepository.cpp
@@ -4214,22 +4214,80 @@ void LLMeshRepository::uploadError(LLSD& args)
 	mUploadErrorQ.push(args);
 }
 
-F32 LLMeshRepository::getStreamingCost(LLUUID mesh_id, F32 radius, S32* bytes, S32* bytes_visible, S32 lod, F32 *unscaled_value)
+F32 LLMeshRepository::getEstTrianglesMax(LLUUID mesh_id)
 {
+    LLMeshCostData costs;
+    if (getCostData(mesh_id, costs))
+    {
+        return costs.getEstTrisMax();
+    }
+    else
+    {
+        return 0.f;
+    }
+}
+
+F32 LLMeshRepository::getEstTrianglesStreamingCost(LLUUID mesh_id)
+{
+    LLMeshCostData costs;
+    if (getCostData(mesh_id, costs))
+    {
+        return costs.getEstTrisForStreamingCost();
+    }
+    else
+    {
+        return 0.f;
+    }
+}
+
+// FIXME replace with calc based on LLMeshCostData
+F32 LLMeshRepository::getStreamingCostLegacy(LLUUID mesh_id, F32 radius, S32* bytes, S32* bytes_visible, S32 lod, F32 *unscaled_value)
+{
+	F32 result = 0.f;
     if (mThread && mesh_id.notNull())
     {
         LLMutexLock lock(mThread->mHeaderMutex);
         LLMeshRepoThread::mesh_header_map::iterator iter = mThread->mMeshHeader.find(mesh_id);
         if (iter != mThread->mMeshHeader.end() && mThread->mMeshHeaderSize[mesh_id] > 0)
         {
-            return getStreamingCost(iter->second, radius, bytes, bytes_visible, lod, unscaled_value);
+            result  = getStreamingCostLegacy(iter->second, radius, bytes, bytes_visible, lod, unscaled_value);
+        }
+    }
+    if (result > 0.f)
+    {
+        LLMeshCostData data;
+        if (getCostData(mesh_id, data))
+        {
+            F32 ref_streaming_cost = data.getRadiusBasedStreamingCost(radius);
+            F32 ref_weighted_tris = data.getRadiusWeightedTris(radius);
+            if (!is_approx_equal(ref_streaming_cost,result))
+            {
+                LL_WARNS() << mesh_id << "streaming mismatch " << result << " " << ref_streaming_cost << LL_ENDL;
+            }
+            if (unscaled_value && !is_approx_equal(ref_weighted_tris,*unscaled_value))
+            {
+                LL_WARNS() << mesh_id << "weighted_tris mismatch " << *unscaled_value << " " << ref_weighted_tris << LL_ENDL;
+            }
+            if (bytes && (*bytes != data.getSizeTotal()))
+            {
+                LL_WARNS() << mesh_id << "bytes mismatch " << *bytes << " " << data.getSizeTotal() << LL_ENDL;
+            }
+            if (bytes_visible && (lod >=0) && (lod < 4) && (*bytes_visible != data.getSizeByLOD(lod)))
+            {
+                LL_WARNS() << mesh_id << "bytes_visible mismatch " << *bytes_visible << " " << data.getSizeByLOD(lod) << LL_ENDL;
+            }
+        }
+        else
+        {
+            LL_WARNS() << "getCostData failed!!!" << LL_ENDL;
         }
     }
-    return 0.f;
+    return result;
 }
 
+// FIXME replace with calc based on LLMeshCostData
 //static
-F32 LLMeshRepository::getStreamingCost(LLSD& header, F32 radius, S32* bytes, S32* bytes_visible, S32 lod, F32 *unscaled_value)
+F32 LLMeshRepository::getStreamingCostLegacy(LLSD& header, F32 radius, S32* bytes, S32* bytes_visible, S32 lod, F32 *unscaled_value)
 {
 	if (header.has("404")
 		|| !header.has("lowest_lod")
@@ -4323,7 +4381,7 @@ F32 LLMeshRepository::getStreamingCost(LLSD& header, F32 radius, S32* bytes, S32
 	F32 weighted_avg = triangles_high*high_area +
 					   triangles_mid*mid_area +
 					   triangles_low*low_area +
-					  triangles_lowest*lowest_area;
+					   triangles_lowest*lowest_area;
 
 	if (unscaled_value)
 	{
@@ -4333,6 +4391,204 @@ F32 LLMeshRepository::getStreamingCost(LLSD& header, F32 radius, S32* bytes, S32
 	return weighted_avg/gSavedSettings.getU32("MeshTriangleBudget")*15000.f;
 }
 
+LLMeshCostData::LLMeshCostData()
+{
+    mSizeByLOD.resize(4);
+    mEstTrisByLOD.resize(4);
+
+    std::fill(mSizeByLOD.begin(), mSizeByLOD.end(), 0);
+    std::fill(mEstTrisByLOD.begin(), mEstTrisByLOD.end(), 0.f);
+}
+
+bool LLMeshCostData::init(const LLSD& header)
+{
+    mSizeByLOD.resize(4);
+    mEstTrisByLOD.resize(4);
+
+    std::fill(mSizeByLOD.begin(), mSizeByLOD.end(), 0);
+    std::fill(mEstTrisByLOD.begin(), mEstTrisByLOD.end(), 0.f);
+    
+    S32 bytes_high = header["high_lod"]["size"].asInteger();
+    S32 bytes_med = header["medium_lod"]["size"].asInteger();
+    if (bytes_med == 0)
+    {
+        bytes_med = bytes_high;
+    }
+    S32 bytes_low = header["low_lod"]["size"].asInteger();
+    if (bytes_low == 0)
+    {
+        bytes_low = bytes_med;
+    }
+    S32 bytes_lowest = header["lowest_lod"]["size"].asInteger();
+    if (bytes_lowest == 0)
+    {
+        bytes_lowest = bytes_low;
+    }
+    mSizeByLOD[0] = bytes_lowest;
+    mSizeByLOD[1] = bytes_low;
+    mSizeByLOD[2] = bytes_med;
+    mSizeByLOD[3] = bytes_high;
+
+    F32 METADATA_DISCOUNT = (F32) gSavedSettings.getU32("MeshMetaDataDiscount");  //discount 128 bytes to cover the cost of LLSD tags and compression domain overhead
+    F32 MINIMUM_SIZE = (F32) gSavedSettings.getU32("MeshMinimumByteSize"); //make sure nothing is "free"
+    F32 bytes_per_triangle = (F32) gSavedSettings.getU32("MeshBytesPerTriangle");
+
+    for (S32 i=0; i<4; i++)
+    {
+        mEstTrisByLOD[i] = llmax((F32) mSizeByLOD[i]-METADATA_DISCOUNT, MINIMUM_SIZE)/bytes_per_triangle; 
+    }
+
+    return true;
+}
+
+
+S32 LLMeshCostData::getSizeByLOD(S32 lod)
+{
+    if (llclamp(lod,0,3) != lod)
+    {
+        return 0;
+    }
+    return mSizeByLOD[lod];
+}
+
+S32 LLMeshCostData::getSizeTotal()
+{
+    return mSizeByLOD[0] + mSizeByLOD[1] + mSizeByLOD[2] + mSizeByLOD[3];
+}
+
+F32 LLMeshCostData::getEstTrisByLOD(S32 lod)
+{
+    if (llclamp(lod,0,3) != lod)
+    {
+        return 0.f;
+    }
+    return mEstTrisByLOD[lod];
+}
+
+F32 LLMeshCostData::getEstTrisMax()
+{
+    return llmax(mEstTrisByLOD[0], mEstTrisByLOD[1], mEstTrisByLOD[2], mEstTrisByLOD[3]);
+}
+
+F32 LLMeshCostData::getRadiusWeightedTris(F32 radius)
+{
+	F32 max_distance = 512.f;
+
+	F32 dlowest = llmin(radius/0.03f, max_distance);
+	F32 dlow = llmin(radius/0.06f, max_distance);
+	F32 dmid = llmin(radius/0.24f, max_distance);
+	
+	F32 triangles_lowest = mEstTrisByLOD[0];
+	F32 triangles_low = mEstTrisByLOD[1];
+	F32 triangles_mid = mEstTrisByLOD[2];
+	F32 triangles_high = mEstTrisByLOD[3];
+
+	F32 max_area = 102944.f; //area of circle that encompasses region (see MAINT-6559)
+	F32 min_area = 1.f;
+
+	F32 high_area = llmin(F_PI*dmid*dmid, max_area);
+	F32 mid_area = llmin(F_PI*dlow*dlow, max_area);
+	F32 low_area = llmin(F_PI*dlowest*dlowest, max_area);
+	F32 lowest_area = max_area;
+
+	lowest_area -= low_area;
+	low_area -= mid_area;
+	mid_area -= high_area;
+
+	high_area = llclamp(high_area, min_area, max_area);
+	mid_area = llclamp(mid_area, min_area, max_area);
+	low_area = llclamp(low_area, min_area, max_area);
+	lowest_area = llclamp(lowest_area, min_area, max_area);
+
+	F32 total_area = high_area + mid_area + low_area + lowest_area;
+	high_area /= total_area;
+	mid_area /= total_area;
+	low_area /= total_area;
+	lowest_area /= total_area;
+
+	F32 weighted_avg = triangles_high*high_area +
+					   triangles_mid*mid_area +
+					   triangles_low*low_area +
+					   triangles_lowest*lowest_area;
+
+    return weighted_avg;
+}
+
+F32 LLMeshCostData::getEstTrisForStreamingCost()
+{
+    LL_DEBUGS("StreamingCost") << "tris_by_lod: "
+                               << mEstTrisByLOD[0] << ", "
+                               << mEstTrisByLOD[1] << ", "
+                               << mEstTrisByLOD[2] << ", "
+                               << mEstTrisByLOD[3] << LL_ENDL;
+
+    F32 charged_tris = mEstTrisByLOD[3];
+    F32 allowed_tris = mEstTrisByLOD[3];
+    const F32 ENFORCE_FLOOR = 64.0f;
+    for (S32 i=2; i>=0; i--)
+    {
+        // How many tris can we have in this LOD without affecting land impact?
+        // - normally an LOD should be at most half the size of the previous one.
+        // - once we reach a floor of ENFORCE_FLOOR, don't require LODs to get any smaller.
+        allowed_tris = llclamp(allowed_tris/2.0f,ENFORCE_FLOOR,mEstTrisByLOD[i]);
+        F32 excess_tris = mEstTrisByLOD[i]-allowed_tris;
+        if (excess_tris>0.f)
+        {
+            LL_DEBUGS("StreamingCost") << "excess tris in lod[" << i << "] " << excess_tris << " allowed " << allowed_tris <<  LL_ENDL;
+            charged_tris += excess_tris;
+        }
+    }
+    return charged_tris;
+}
+
+F32 LLMeshCostData::getRadiusBasedStreamingCost(F32 radius)
+{
+	return getRadiusWeightedTris(radius)/gSavedSettings.getU32("MeshTriangleBudget")*15000.f;
+}
+
+F32 LLMeshCostData::getTriangleBasedStreamingCost()
+{
+    F32 result = ANIMATED_OBJECT_COST_PER_KTRI * 0.001 * getEstTrisForStreamingCost();
+    return result;
+}
+
+bool LLMeshRepository::getCostData(LLUUID mesh_id, LLMeshCostData& data)
+{
+    data = LLMeshCostData();
+    
+    if (mThread && mesh_id.notNull())
+    {
+        LLMutexLock lock(mThread->mHeaderMutex);
+        LLMeshRepoThread::mesh_header_map::iterator iter = mThread->mMeshHeader.find(mesh_id);
+        if (iter != mThread->mMeshHeader.end() && mThread->mMeshHeaderSize[mesh_id] > 0)
+        {
+            LLSD& header = iter->second;
+
+            bool header_invalid = (header.has("404")
+                                   || !header.has("lowest_lod")
+                                   || (header.has("version") && header["version"].asInteger() > MAX_MESH_VERSION));
+            if (!header_invalid)
+            {
+                return getCostData(header, data);
+            }
+
+            return true;
+        }
+    }
+    return false;
+}
+
+bool LLMeshRepository::getCostData(LLSD& header, LLMeshCostData& data)
+{
+    data = LLMeshCostData();
+
+    if (!data.init(header))
+    {
+        return false;
+    }
+    
+    return true;
+}
 
 LLPhysicsDecomp::LLPhysicsDecomp()
 : LLThread("Physics Decomp")
diff --git a/indra/newview/llmeshrepository.h b/indra/newview/llmeshrepository.h
index 22215c784a..bba0c9f2cb 100644
--- a/indra/newview/llmeshrepository.h
+++ b/indra/newview/llmeshrepository.h
@@ -490,6 +490,53 @@ private:
 	LLCore::HttpRequest::priority_t		mHttpPriority;
 };
 
+// Params related to streaming cost, render cost, and scene complexity tracking.
+class LLMeshCostData
+{
+public:
+    LLMeshCostData();
+
+    bool init(const LLSD& header);
+    
+    // Size for given LOD
+    S32 getSizeByLOD(S32 lod);
+
+    // Sum of all LOD sizes.
+    S32 getSizeTotal();
+
+    // Estimated triangle counts for the given LOD.
+    F32 getEstTrisByLOD(S32 lod);
+    
+    // Estimated triangle counts for the largest LOD. Typically this
+    // is also the "high" LOD, but not necessarily.
+    F32 getEstTrisMax();
+
+    // Triangle count as computed by original streaming cost
+    // formula. Triangles in each LOD are weighted based on how
+    // frequently they will be seen.
+    // This was called "unscaled_value" in the original getStreamingCost() functions.
+    F32 getRadiusWeightedTris(F32 radius);
+
+    // Triangle count used by triangle-based cost formula. Based on
+    // triangles in highest LOD plus potentially partial charges for
+    // lower LODs depending on complexity.
+    F32 getEstTrisForStreamingCost();
+
+    // Streaming cost. This should match the server-side calculation
+    // for the corresponding volume.
+    F32 getRadiusBasedStreamingCost(F32 radius);
+
+    // New streaming cost formula, currently only used for animated objects.
+    F32 getTriangleBasedStreamingCost();
+
+private:
+    // From the "size" field of the mesh header. LOD 0=lowest, 3=highest.
+    std::vector<S32> mSizeByLOD;
+
+    // Estimated triangle counts derived from the LOD sizes. LOD 0=lowest, 3=highest.
+    std::vector<F32> mEstTrisByLOD;
+};
+
 class LLMeshRepository
 {
 public:
@@ -511,8 +558,13 @@ public:
 	
 	static LLDeadmanTimer sQuiescentTimer;		// Time-to-complete-mesh-downloads after significant events
 
-	F32 getStreamingCost(LLUUID mesh_id, F32 radius, S32* bytes = NULL, S32* visible_bytes = NULL, S32 detail = -1, F32 *unscaled_value = NULL);
-	static F32 getStreamingCost(LLSD& header, F32 radius, S32* bytes = NULL, S32* visible_bytes = NULL, S32 detail = -1, F32 *unscaled_value = NULL);
+    // Estimated triangle count of the largest LOD
+    F32 getEstTrianglesMax(LLUUID mesh_id);
+    F32 getEstTrianglesStreamingCost(LLUUID mesh_id);
+	F32 getStreamingCostLegacy(LLUUID mesh_id, F32 radius, S32* bytes = NULL, S32* visible_bytes = NULL, S32 detail = -1, F32 *unscaled_value = NULL);
+	static F32 getStreamingCostLegacy(LLSD& header, F32 radius, S32* bytes = NULL, S32* visible_bytes = NULL, S32 detail = -1, F32 *unscaled_value = NULL);
+    bool getCostData(LLUUID mesh_id, LLMeshCostData& data);
+    bool getCostData(LLSD& header, LLMeshCostData& data);
 
 	LLMeshRepository();
 
@@ -623,5 +675,8 @@ public:
 
 extern LLMeshRepository gMeshRepo;
 
+const F32 ANIMATED_OBJECT_BASE_COST = 15.0f;
+const F32 ANIMATED_OBJECT_COST_PER_KTRI = 1.5f;
+
 #endif
 
diff --git a/indra/newview/llpanelvolume.cpp b/indra/newview/llpanelvolume.cpp
index 1c4384ff08..96dd309fa4 100644
--- a/indra/newview/llpanelvolume.cpp
+++ b/indra/newview/llpanelvolume.cpp
@@ -78,6 +78,8 @@
 #include "llviewercontrol.h"
 #include "llmeshrepository.h"
 
+#include "llvoavatarself.h"
+
 #include <boost/bind.hpp>
 
 // "Features" Tab
@@ -86,6 +88,7 @@ BOOL	LLPanelVolume::postBuild()
 {
 	// Flexible Objects Parameters
 	{
+		childSetCommitCallback("Animated Mesh Checkbox Ctrl", boost::bind(&LLPanelVolume::onCommitAnimatedMeshCheckbox, this, _1, _2), NULL);
 		childSetCommitCallback("Flexible1D Checkbox Ctrl", boost::bind(&LLPanelVolume::onCommitIsFlexible, this, _1, _2), NULL);
 		childSetCommitCallback("FlexNumSections",onCommitFlexible,this);
 		getChild<LLUICtrl>("FlexNumSections")->setValidateBeforeCommit(precommitValidate);
@@ -237,6 +240,11 @@ void LLPanelVolume::getState( )
 	{
 		volobjp = (LLVOVolume *)objectp;
 	}
+	LLVOVolume *root_volobjp = NULL;
+    if (root_objectp && (root_objectp->getPCode() == LL_PCODE_VOLUME))
+    {
+        root_volobjp  = (LLVOVolume *)root_objectp;
+    }
 	
 	if( !objectp )
 	{
@@ -260,6 +268,8 @@ void LLPanelVolume::getState( )
 	BOOL editable = root_objectp->permModify() && !root_objectp->isPermanentEnforced();
 	BOOL single_volume = LLSelectMgr::getInstance()->selectionAllPCode( LL_PCODE_VOLUME )
 		&& LLSelectMgr::getInstance()->getSelection()->getObjectCount() == 1;
+    BOOL single_root_volume = LLSelectMgr::getInstance()->selectionAllPCode( LL_PCODE_VOLUME ) && 
+        LLSelectMgr::getInstance()->getSelection()->getRootObjectCount() == 1;
 
 	// Select Single Message
 	if (single_volume)
@@ -345,7 +355,35 @@ void LLPanelVolume::getState( )
 		getChildView("Light Focus")->setEnabled(false);
 		getChildView("Light Ambiance")->setEnabled(false);
 	}
-	
+
+    // Animated Mesh
+	BOOL is_animated_mesh = single_root_volume && root_volobjp && root_volobjp->isAnimatedObject();
+	getChild<LLUICtrl>("Animated Mesh Checkbox Ctrl")->setValue(is_animated_mesh);
+    BOOL enabled_animated_object_box = FALSE;
+    if (root_volobjp && root_volobjp == volobjp)
+    {
+        enabled_animated_object_box = single_root_volume && root_volobjp && root_volobjp->canBeAnimatedObject() && editable; 
+#if 0
+        if (!enabled_animated_object_box)
+        {
+            LL_INFOS() << "not enabled: srv " << single_root_volume << " root_volobjp " << (bool) root_volobjp << LL_ENDL;
+            if (root_volobjp)
+            {
+                LL_INFOS() << " cba " << root_volobjp->canBeAnimatedObject()
+                           << " editable " << editable << " permModify() " << root_volobjp->permModify()
+                           << " ispermenf " << root_volobjp->isPermanentEnforced() << LL_ENDL;
+            }
+        }
+#endif
+        if (enabled_animated_object_box && !is_animated_mesh && 
+            root_volobjp->isAttachment() && !gAgentAvatarp->canAttachMoreAnimatedObjects())
+        {
+            // Turning this attachment animated would cause us to exceed the limit.
+            enabled_animated_object_box = false;
+        }
+    }
+    getChildView("Animated Mesh Checkbox Ctrl")->setEnabled(enabled_animated_object_box);
+
 	// Flexible properties
 	BOOL is_flexible = volobjp && volobjp->isFlexible();
 	getChild<LLUICtrl>("Flexible1D Checkbox Ctrl")->setValue(is_flexible);
@@ -582,6 +620,7 @@ void LLPanelVolume::clearCtrls()
 	getChildView("Light Radius")->setEnabled(false);
 	getChildView("Light Falloff")->setEnabled(false);
 
+    getChildView("Animated Mesh Checkbox Ctrl")->setEnabled(false);
 	getChildView("Flexible1D Checkbox Ctrl")->setEnabled(false);
 	getChildView("FlexNumSections")->setEnabled(false);
 	getChildView("FlexGravity")->setEnabled(false);
@@ -891,6 +930,31 @@ void LLPanelVolume::onCommitFlexible( LLUICtrl* ctrl, void* userdata )
 	self->refresh();
 }
 
+void LLPanelVolume::onCommitAnimatedMeshCheckbox(LLUICtrl *, void*)
+{
+	LLViewerObject* objectp = mObject;
+	if (!objectp || (objectp->getPCode() != LL_PCODE_VOLUME))
+	{
+		return;
+    }
+	LLVOVolume *volobjp = (LLVOVolume *)objectp;
+	BOOL animated_mesh = getChild<LLUICtrl>("Animated Mesh Checkbox Ctrl")->getValue();
+    U32 flags = volobjp->getExtendedMeshFlags();
+    U32 new_flags = flags;
+    if (animated_mesh)
+    {
+        new_flags |= LLExtendedMeshParams::ANIMATED_MESH_ENABLED_FLAG;
+    }
+    else
+    {
+        new_flags &= ~LLExtendedMeshParams::ANIMATED_MESH_ENABLED_FLAG;
+    }
+    if (new_flags != flags)
+    {
+        volobjp->setExtendedMeshFlags(new_flags);
+    }
+}
+
 void LLPanelVolume::onCommitIsFlexible(LLUICtrl *, void*)
 {
 	if (mObject->flagObjectPermanent())
diff --git a/indra/newview/llpanelvolume.h b/indra/newview/llpanelvolume.h
index e3453ae99c..66117316cf 100644
--- a/indra/newview/llpanelvolume.h
+++ b/indra/newview/llpanelvolume.h
@@ -63,6 +63,7 @@ public:
 	static void 	onCommitLight(			LLUICtrl* ctrl, void* userdata);
 	void 			onCommitIsFlexible(		LLUICtrl* ctrl, void* userdata);
 	static void 	onCommitFlexible(		LLUICtrl* ctrl, void* userdata);
+    void            onCommitAnimatedMeshCheckbox(LLUICtrl* ctrl, void* userdata);
 	static void     onCommitPhysicsParam(       LLUICtrl* ctrl, void* userdata);
 	static void 	onCommitMaterial(		LLUICtrl* ctrl, void* userdata);
 
diff --git a/indra/newview/llpipelinelistener.cpp b/indra/newview/llpipelinelistener.cpp
index dfbe689f56..f11cdcf876 100644
--- a/indra/newview/llpipelinelistener.cpp
+++ b/indra/newview/llpipelinelistener.cpp
@@ -87,7 +87,7 @@ namespace {
 			U32 render_feature = feature_from_string( iter->asString() );
 			if ( render_feature != 0 )
 			{
-				LLPipeline::toggleRenderDebugControl( render_feature );
+				LLPipeline::toggleRenderDebugFeatureControl( render_feature );
 			}
 		}
 	}
@@ -123,7 +123,7 @@ namespace {
 			iter != request["displays"].endArray();
 			++iter)
 		{
-			U32 info_display = info_display_from_string( iter->asString() );
+			U64 info_display = info_display_from_string( iter->asString() );
 			if ( info_display != 0 )
 			{
 				LLPipeline::toggleRenderDebug( info_display );
@@ -134,7 +134,7 @@ namespace {
 	void has_info_display_wrapper(LLSD const& request)
 	{
 		LLEventAPI::Response response(LLSD(), request);
-		U32 info_display = info_display_from_string( request["display"].asString() );
+		U64 info_display = info_display_from_string( request["display"].asString() );
 		if ( info_display != 0 )
 		{
 			response["value"] = gPipeline.hasRenderDebugMask(info_display);
diff --git a/indra/newview/llsceneview.cpp b/indra/newview/llsceneview.cpp
index 112fa5b4e1..f7aa63e34d 100644
--- a/indra/newview/llsceneview.cpp
+++ b/indra/newview/llsceneview.cpp
@@ -33,6 +33,7 @@
 #include "llviewerregion.h"
 #include "llagent.h"
 #include "llvolumemgr.h"
+#include "llmeshrepository.h"
 
 LLSceneView* gSceneView = NULL;
 
@@ -129,17 +130,23 @@ void LLSceneView::draw()
 				visible_triangles[idx].push_back(visible);
 				triangles[idx].push_back(high_triangles);
 
-				S32 bytes = 0;
-				S32 visible_bytes = 0;
-
-				F32 streaming = object->getStreamingCost(&bytes, &visible_bytes);
-				total_streaming[idx] += streaming;
-				streaming_cost[idx].push_back(streaming);
+                F32 streaming = object->getStreamingCost();
+                total_streaming[idx] += streaming;
+                streaming_cost[idx].push_back(streaming);
 
 				F32 physics = object->getPhysicsCost();
 				total_physics[idx] += physics;
 				physics_cost[idx].push_back(physics);
 
+				S32 bytes = 0;
+				S32 visible_bytes = 0;
+                LLMeshCostData costs;
+                if (object->getCostData(costs))
+                {
+                    bytes = costs.getSizeTotal();
+                    visible_bytes = costs.getSizeByLOD(object->getLOD());
+                }
+
 				total_bytes[idx] += bytes;
 				total_visible_bytes[idx] += visible_bytes;
 			}
diff --git a/indra/newview/llselectmgr.cpp b/indra/newview/llselectmgr.cpp
index fce21fa30a..4a2d545b33 100644
--- a/indra/newview/llselectmgr.cpp
+++ b/indra/newview/llselectmgr.cpp
@@ -46,6 +46,7 @@
 #include "llundo.h"
 #include "lluuid.h"
 #include "llvolume.h"
+#include "llcontrolavatar.h"
 #include "message.h"
 #include "object_flags.h"
 #include "llquaternion.h"
@@ -645,6 +646,10 @@ void LLSelectMgr::confirmUnlinkObjects(const LLSD& notification, const LLSD& res
 // otherwise. this allows the handle_link method to more finely check
 // the selection and give an error message when the uer has a
 // reasonable expectation for the link to work, but it will fail.
+//
+// For animated objects, there's additional check that if the
+// selection includes at least one animated object, the total mesh
+// triangle count cannot exceed the designated limit.
 bool LLSelectMgr::enableLinkObjects()
 {
 	bool new_value = false;
@@ -669,6 +674,10 @@ bool LLSelectMgr::enableLinkObjects()
 			new_value = LLSelectMgr::getInstance()->getSelection()->applyToRootObjects(&func, firstonly);
 		}
 	}
+    if (!LLSelectMgr::getInstance()->getSelection()->checkAnimatedObjectLinkable())
+    {
+        new_value = false;
+    }
 	return new_value;
 }
 
@@ -6659,7 +6668,10 @@ S32 get_family_count(LLViewerObject *parent)
 
 //-----------------------------------------------------------------------------
 // updateSelectionCenter
-//-----------------------------------------------------------------------------
+//
+// FIXME this is a grab bag of functionality only some of which has to do
+// with the selection center
+// -----------------------------------------------------------------------------
 void LLSelectMgr::updateSelectionCenter()
 {
 	const F32 MOVE_SELECTION_THRESHOLD = 1.f;		//  Movement threshold in meters for updating selection
@@ -6677,23 +6689,12 @@ void LLSelectMgr::updateSelectionCenter()
 		mSelectionCenterGlobal.clearVec();
 		mShowSelection = FALSE;
 		mSelectionBBox = LLBBox(); 
-		mPauseRequest = NULL;
 		resetAgentHUDZoom();
-
 	}
 	else
 	{
 		mSelectedObjects->mSelectType = getSelectTypeForObject(object);
 
-		if (mSelectedObjects->mSelectType == SELECT_TYPE_ATTACHMENT && isAgentAvatarValid() && object->getParent() != NULL)
-		{
-			mPauseRequest = gAgentAvatarp->requestPause();
-		}
-		else
-		{
-			mPauseRequest = NULL;
-		}
-
 		if (mSelectedObjects->mSelectType != SELECT_TYPE_HUD && isAgentAvatarValid())
 		{
 			// reset hud ZOOM
@@ -6770,6 +6771,59 @@ void LLSelectMgr::updateSelectionCenter()
 	{
 		gEditMenuHandler = NULL;
 	}
+
+    pauseAssociatedAvatars();
+}
+
+//-----------------------------------------------------------------------------
+// pauseAssociatedAvatars
+//
+// If the selection includes an attachment or an animated object, the
+// associated avatars should pause their animations until they are no
+// longer selected.
+//-----------------------------------------------------------------------------
+void LLSelectMgr::pauseAssociatedAvatars()
+{
+    mPauseRequests.clear();
+
+    for (LLObjectSelection::iterator iter = mSelectedObjects->begin();
+         iter != mSelectedObjects->end(); iter++)
+    {
+        LLSelectNode* node = *iter;
+        LLViewerObject* object = node->getObject();
+        if (!object)
+            continue;
+			
+        mSelectedObjects->mSelectType = getSelectTypeForObject(object);
+
+        if (mSelectedObjects->mSelectType == SELECT_TYPE_ATTACHMENT && 
+            isAgentAvatarValid() && object->getParent() != NULL)
+        {
+            if (object->isAnimatedObject())
+            {
+                // Is an animated object attachment.
+                // Pause both the control avatar and the avatar it's attached to.
+                if (object->getControlAvatar())
+                {
+                    mPauseRequests.push_back(object->getControlAvatar()->requestPause());
+                }
+                mPauseRequests.push_back(gAgentAvatarp->requestPause());
+            }
+            else
+            {
+                // Is a regular attachment. Pause the avatar it's attached to.
+                mPauseRequests.push_back(gAgentAvatarp->requestPause());
+            }
+        }
+        else
+        {
+            if (object && object->isAnimatedObject() && object->getControlAvatar())
+            {
+                // Is a non-attached animated object. Pause the control avatar.
+                mPauseRequests.push_back(object->getControlAvatar()->requestPause());
+            }
+        }
+    }
 }
 
 void LLSelectMgr::updatePointAt()
@@ -7246,10 +7300,16 @@ F32 LLObjectSelection::getSelectedObjectStreamingCost(S32* total_bytes, S32* vis
 		
 		if (object)
 		{
-			S32 bytes = 0;
-			S32 visible = 0;
-			cost += object->getStreamingCost(&bytes, &visible);
+			cost += object->getStreamingCost();
 
+            S32 bytes = 0;
+            S32 visible = 0;
+            LLMeshCostData costs;
+            if (object->getCostData(costs))
+            {
+                bytes = costs.getSizeTotal();
+                visible = costs.getSizeByLOD(object->getLOD());
+            }
 			if (total_bytes)
 			{
 				*total_bytes += bytes;
@@ -7406,6 +7466,31 @@ bool LLObjectSelection::applyToObjects(LLSelectedObjectFunctor* func)
 	return result;
 }
 
+bool LLObjectSelection::checkAnimatedObjectEstTris()
+{
+    F32 est_tris = 0;
+    F32 max_tris = 0;
+    S32 anim_count = 0;
+	for (root_iterator iter = root_begin(); iter != root_end(); ++iter)
+	{
+		LLViewerObject* object = (*iter)->getObject();
+		if (!object)
+			continue;
+        if (object->isAnimatedObject())
+        {
+            anim_count++;
+        }
+        est_tris += object->recursiveGetEstTrianglesMax();
+        max_tris = llmax((F32)max_tris,(F32)object->getAnimatedObjectMaxTris());
+	}
+	return anim_count==0 || est_tris <= max_tris;
+}
+
+bool LLObjectSelection::checkAnimatedObjectLinkable()
+{
+    return checkAnimatedObjectEstTris();
+}
+
 bool LLObjectSelection::applyToRootObjects(LLSelectedObjectFunctor* func, bool firstonly)
 {
 	bool result = firstonly ? false : true;
diff --git a/indra/newview/llselectmgr.h b/indra/newview/llselectmgr.h
index 87ac899325..caf104178f 100644
--- a/indra/newview/llselectmgr.h
+++ b/indra/newview/llselectmgr.h
@@ -340,6 +340,9 @@ public:
 	// returns TRUE is any node is currenly worn as an attachment
 	BOOL isAttachment();
 
+    bool checkAnimatedObjectEstTris();
+    bool checkAnimatedObjectLinkable();
+    
 	// Apply functors to various subsets of the selected objects
 	// If firstonly is FALSE, returns the AND of all apply() calls.
 	// Else returns TRUE immediately if any apply() call succeeds (i.e. OR with early exit)
@@ -748,6 +751,8 @@ public:
 	LLVector3d		getSelectionCenterGlobal() const	{ return mSelectionCenterGlobal; }
 	void			updateSelectionCenter();
 
+    void pauseAssociatedAvatars();
+
 	void resetAgentHUDZoom();
 	void setAgentHUDZoom(F32 target_zoom, F32 current_zoom);
 	void getAgentHUDZoom(F32 &target_zoom, F32 &current_zoom) const;
@@ -849,7 +854,7 @@ private:
 	LLFrameTimer			mEffectsTimer;
 	BOOL					mForceSelection;
 
-	LLAnimPauseRequest		mPauseRequest;
+    std::vector<LLAnimPauseRequest>	mPauseRequests;
 };
 
 // *DEPRECATED: For callbacks or observers, use
diff --git a/indra/newview/llskinningutil.cpp b/indra/newview/llskinningutil.cpp
index dba690242a..0fa4c2b114 100644
--- a/indra/newview/llskinningutil.cpp
+++ b/indra/newview/llskinningutil.cpp
@@ -31,26 +31,73 @@
 #include "llvoavatar.h"
 #include "llviewercontrol.h"
 #include "llmeshrepository.h"
+#include "llvolume.h"
+#include "llrigginginfo.h"
+
+void dump_avatar_and_skin_state(const std::string& reason, LLVOAvatar *avatar, const LLMeshSkinInfo *skin)
+{
+    static S32 dump_count = 0;
+    const S32 max_dump = 10;
+
+    if (dump_count < max_dump)
+    {
+        LL_WARNS("Avatar") << avatar->getFullname() << " dumping, reason " << reason
+                           << " avatar build state: isBuilt() " << avatar->isBuilt() 
+                           << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
+        LL_WARNS("Avatar") << "Skin num joints " << skin->mJointNames.size() << " " << skin->mJointNums.size() << LL_ENDL;
+        LL_WARNS("Avatar") << "Skin scrubbed " << skin->mInvalidJointsScrubbed 
+                           << " nums init " << skin->mJointNumsInitialized << LL_ENDL;
+        for (S32 j=0; j<skin->mJointNames.size(); j++)
+        {
+            LL_WARNS("Avatar") << "skin joint idx " << j << " name [" << skin->mJointNames[j] 
+                               << "] num " << skin->mJointNums[j] << LL_ENDL;
+            const std::string& name = skin->mJointNames[j];
+            S32 joint_num = skin->mJointNums[j];
+
+            LLJoint *name_joint = avatar->getJoint(name);
+            LLJoint *num_joint = avatar->getJoint(joint_num);
+            if (!name_joint)
+            {
+                LL_WARNS("Avatar") << "failed to find joint by name" << LL_ENDL; 
+            }
+            if (!num_joint)
+            {
+                LL_WARNS("Avatar") << "failed to find joint by num" << LL_ENDL; 
+            }
+            if (num_joint != name_joint)
+            {
+                LL_WARNS("Avatar") << "joint pointers don't match" << LL_ENDL;
+            }
+            if (num_joint && num_joint->getJointNum() != joint_num)
+            {
+                LL_WARNS("Avatar") << "joint found by num has wrong num " << joint_num << "!=" << num_joint->getJointNum() << LL_ENDL;
+            }
+            if (name_joint && name_joint->getJointNum() != joint_num)
+            {
+                LL_WARNS("Avatar") << "joint found by name has wrong num " << joint_num << "!=" << name_joint->getJointNum() << LL_ENDL;
+            }
+        }
+        LL_WARNS("Avatar") << LL_ENDL;
+
+        dump_count++;
+    }
+}
 
-// static
 void LLSkinningUtil::initClass()
 {
 }
 
-// static
 U32 LLSkinningUtil::getMaxJointCount()
 {
     U32 result = LL_MAX_JOINTS_PER_MESH_OBJECT;
 	return result;
 }
 
-// static
 U32 LLSkinningUtil::getMeshJointCount(const LLMeshSkinInfo *skin)
 {
 	return llmin((U32)getMaxJointCount(), (U32)skin->mJointNames.size());
 }
 
-// static
 void LLSkinningUtil::scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin)
 {
     if (skin->mInvalidJointsScrubbed)
@@ -64,35 +111,25 @@ void LLSkinningUtil::scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin
         // needed for handling of any legacy bad data.
         if (!avatar->getJoint(skin->mJointNames[j]))
         {
-            LL_DEBUGS("Avatar") << "Mesh rigged to invalid joint" << skin->mJointNames[j] << LL_ENDL;
+            LL_DEBUGS("Avatar") << avatar->getFullname() << " mesh rigged to invalid joint " << skin->mJointNames[j] << LL_ENDL;
+            LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " mesh rigged to invalid joint" << skin->mJointNames[j] << LL_ENDL;
             skin->mJointNames[j] = "mPelvis";
+            skin->mJointNumsInitialized = false; // force update after names change.
         }
     }
     skin->mInvalidJointsScrubbed = true;
 }
 
-// static
 void LLSkinningUtil::initSkinningMatrixPalette(
     LLMatrix4* mat,
     S32 count, 
     const LLMeshSkinInfo* skin,
     LLVOAvatar *avatar)
 {
+    initJointNums(const_cast<LLMeshSkinInfo*>(skin), avatar);
     for (U32 j = 0; j < count; ++j)
     {
-        LLJoint *joint = NULL;
-        if (skin->mJointNums[j] == -1)
-        {
-            joint = avatar->getJoint(skin->mJointNames[j]);
-            if (joint)
-            {
-                skin->mJointNums[j] = joint->getJointNum();
-            }
-        }
-		else
-		{
-			joint = avatar->getJoint(skin->mJointNums[j]);
-		}
+        LLJoint *joint = avatar->getJoint(skin->mJointNums[j]);
         if (joint)
         {
 #define MAT_USE_SSE
@@ -114,12 +151,19 @@ void LLSkinningUtil::initSkinningMatrixPalette(
             // rendering  should  be disabled  unless  all joints  are
             // valid.  In other  cases of  skinned  rendering, invalid
             // joints should already have  been removed during scrubInvalidJoints().
-            LL_WARNS_ONCE("Avatar") << "Rigged to invalid joint name " << skin->mJointNames[j] << LL_ENDL;
+            LL_WARNS_ONCE("Avatar") << avatar->getFullname() 
+                                    << " rigged to invalid joint name " << skin->mJointNames[j] 
+                                    << " num " << skin->mJointNums[j] << LL_ENDL;
+            LL_WARNS_ONCE("Avatar") << avatar->getFullname() 
+                                    << " avatar build state: isBuilt() " << avatar->isBuilt() 
+                                    << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
+#if 0
+            dump_avatar_and_skin_state("initSkinningMatrixPalette joint not found", avatar, skin);
+#endif
         }
     }
 }
 
-// static
 void LLSkinningUtil::checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin)
 {
 #ifdef SHOW_ASSERT                  // same condition that controls llassert()
@@ -159,7 +203,6 @@ void LLSkinningUtil::scrubSkinWeights(LLVector4a* weights, U32 num_vertices, con
 	checkSkinWeights(weights, num_vertices, skin);
 }
 
-// static
 void LLSkinningUtil::getPerVertexSkinMatrix(
     F32* weights,
     LLMatrix4a* mat,
@@ -216,3 +259,150 @@ void LLSkinningUtil::getPerVertexSkinMatrix(
     llassert(valid_weights);
 }
 
+void LLSkinningUtil::initJointNums(LLMeshSkinInfo* skin, LLVOAvatar *avatar)
+{
+    if (!skin->mJointNumsInitialized)
+    {
+        for (U32 j = 0; j < skin->mJointNames.size(); ++j)
+        {
+            LLJoint *joint = NULL;
+            if (skin->mJointNums[j] == -1)
+            {
+                joint = avatar->getJoint(skin->mJointNames[j]);
+                if (joint)
+                {
+                    skin->mJointNums[j] = joint->getJointNum();
+                    if (skin->mJointNums[j] < 0)
+                    {
+                        LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " joint has unusual number " << skin->mJointNames[j] << ": " << skin->mJointNums[j] << LL_ENDL;
+                        LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " avatar build state: isBuilt() " << avatar->isBuilt() << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
+                    }
+                }
+                else
+                {
+                    LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " unable to find joint " << skin->mJointNames[j] << LL_ENDL;
+                    LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " avatar build state: isBuilt() " << avatar->isBuilt() << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
+#if 0
+                    dump_avatar_and_skin_state("initJointNums joint not found", avatar, skin);
+#endif
+                }
+            }
+        }
+        skin->mJointNumsInitialized = true;
+    }
+}
+
+static LLTrace::BlockTimerStatHandle FTM_FACE_RIGGING_INFO("Face Rigging Info");
+
+void LLSkinningUtil::updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *avatar, LLVolumeFace& vol_face)
+{
+    LL_RECORD_BLOCK_TIME(FTM_FACE_RIGGING_INFO);
+
+    if (vol_face.mJointRiggingInfoTab.needsUpdate())
+    {
+        S32 num_verts = vol_face.mNumVertices;
+        if (num_verts>0 && vol_face.mWeights && (skin->mJointNames.size()>0))
+        {
+            initJointNums(const_cast<LLMeshSkinInfo*>(skin), avatar);
+            if (vol_face.mJointRiggingInfoTab.size()==0)
+            {
+                //std::set<S32> active_joints;
+                //S32 active_verts = 0;
+                vol_face.mJointRiggingInfoTab.resize(LL_CHARACTER_MAX_ANIMATED_JOINTS);
+                LLJointRiggingInfoTab &rig_info_tab = vol_face.mJointRiggingInfoTab;
+                for (S32 i=0; i<vol_face.mNumVertices; i++)
+                {
+                    LLVector4a& pos = vol_face.mPositions[i];
+                    F32 *weights = vol_face.mWeights[i].getF32ptr();
+                    LLVector4 wght;
+                    S32 idx[4];
+                    F32 scale = 0.0f;
+                    // FIXME unpacking of weights should be pulled into a common function and optimized if possible.
+                    for (U32 k = 0; k < 4; k++)
+                    {
+                        F32 w = weights[k];
+                        idx[k] = llclamp((S32) floorf(w), (S32)0, (S32)LL_CHARACTER_MAX_ANIMATED_JOINTS-1);
+                        wght[k] = w - idx[k];
+                        scale += wght[k];
+                    }
+                    if (scale > 0.0f)
+                    {
+                        for (U32 k=0; k<4; ++k)
+                        {
+                            wght[k] /= scale;
+                        }
+                    }
+                    for (U32 k=0; k<4; ++k)
+                    {
+						S32 joint_index = idx[k];
+                        if (wght[k] > 0.0f)
+                        {
+                            S32 joint_num = skin->mJointNums[joint_index];
+                            if (joint_num >= 0 && joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS)
+                            {
+                                rig_info_tab[joint_num].setIsRiggedTo(true);
+
+                                // FIXME could precompute these matMuls.
+                                LLMatrix4a bind_shape;
+                                bind_shape.loadu(skin->mBindShapeMatrix);
+                                LLMatrix4a inv_bind;
+                                inv_bind.loadu(skin->mInvBindMatrix[joint_index]);
+                                LLMatrix4a mat;
+                                matMul(bind_shape, inv_bind, mat);
+                                LLVector4a pos_joint_space;
+                                mat.affineTransform(pos, pos_joint_space);
+                                pos_joint_space.mul(wght[k]);
+                                LLVector4a *extents = rig_info_tab[joint_num].getRiggedExtents();
+                                update_min_max(extents[0], extents[1], pos_joint_space);
+                            }
+                        }
+                    }
+                }
+                //LL_DEBUGS("RigSpammish") << "built rigging info for vf " << &vol_face 
+                //                         << " num_verts " << vol_face.mNumVertices
+                //                         << " active joints " << active_joints.size()
+                //                         << " active verts " << active_verts
+                //                         << LL_ENDL; 
+                vol_face.mJointRiggingInfoTab.setNeedsUpdate(false);
+            }
+        }
+        if (vol_face.mJointRiggingInfoTab.size()!=0)
+        {
+            LL_DEBUGS("RigSpammish") << "we have rigging info for vf " << &vol_face 
+                                     << " num_verts " << vol_face.mNumVertices << LL_ENDL; 
+        }
+        else
+        {
+            LL_DEBUGS("RigSpammish") << "no rigging info for vf " << &vol_face 
+                                     << " num_verts " << vol_face.mNumVertices << LL_ENDL; 
+        }
+
+    }
+}
+
+// This is used for extracting rotation from a bind shape matrix that
+// already has scales baked in
+LLQuaternion LLSkinningUtil::getUnscaledQuaternion(const LLMatrix4& mat4)
+{
+    LLMatrix3 bind_mat = mat4.getMat3();
+    for (auto i = 0; i < 3; i++)
+    {
+        F32 len = 0.0f;
+        for (auto j = 0; j < 3; j++)
+        {
+            len += bind_mat.mMatrix[i][j] * bind_mat.mMatrix[i][j];
+        }
+        if (len > 0.0f)
+        {
+            len = sqrt(len);
+            for (auto j = 0; j < 3; j++)
+            {
+                bind_mat.mMatrix[i][j] /= len;
+            }
+        }
+    }
+    bind_mat.invert();
+    LLQuaternion bind_rot = bind_mat.quaternion();
+    bind_rot.normalize();
+    return bind_rot;
+}
diff --git a/indra/newview/llskinningutil.h b/indra/newview/llskinningutil.h
index 135b25d4d2..ccc501adc0 100644
--- a/indra/newview/llskinningutil.h
+++ b/indra/newview/llskinningutil.h
@@ -30,18 +30,21 @@
 class LLVOAvatar;
 class LLMeshSkinInfo;
 class LLMatrix4a;
+class LLVolumeFace;
 
-class LLSkinningUtil
+namespace LLSkinningUtil
 {
-public:
-    static void initClass();
-    static U32 getMaxJointCount();
-    static U32 getMeshJointCount(const LLMeshSkinInfo *skin);
-    static void scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin);
-    static void initSkinningMatrixPalette(LLMatrix4* mat, S32 count, const LLMeshSkinInfo* skin, LLVOAvatar *avatar);
-    static void checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin);
-    static void scrubSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin);
-    static void getPerVertexSkinMatrix(F32* weights, LLMatrix4a* mat, bool handle_bad_scale, LLMatrix4a& final_mat, U32 max_joints);
+    void initClass();
+    U32 getMaxJointCount();
+    U32 getMeshJointCount(const LLMeshSkinInfo *skin);
+    void scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin);
+    void initSkinningMatrixPalette(LLMatrix4* mat, S32 count, const LLMeshSkinInfo* skin, LLVOAvatar *avatar);
+    void checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin);
+    void scrubSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin);
+    void getPerVertexSkinMatrix(F32* weights, LLMatrix4a* mat, bool handle_bad_scale, LLMatrix4a& final_mat, U32 max_joints);
+    void initJointNums(LLMeshSkinInfo* skin, LLVOAvatar *avatar);
+    void updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *avatar, LLVolumeFace& vol_face);
+	LLQuaternion getUnscaledQuaternion(const LLMatrix4& mat4);
 };
 
 #endif
diff --git a/indra/newview/llspatialpartition.cpp b/indra/newview/llspatialpartition.cpp
index 9791f4a921..1dc1e65fe5 100644
--- a/indra/newview/llspatialpartition.cpp
+++ b/indra/newview/llspatialpartition.cpp
@@ -29,6 +29,7 @@
 #include "llspatialpartition.h"
 
 #include "llappviewer.h"
+#include "llcallstack.h"
 #include "lltexturecache.h"
 #include "lltexturefetch.h"
 #include "llimageworker.h"
@@ -52,6 +53,9 @@
 #include "llvolumemgr.h"
 #include "lltextureatlas.h"
 #include "llviewershadermgr.h"
+#include "llcontrolavatar.h"
+
+//#pragma optimize("", off)
 
 static LLTrace::BlockTimerStatHandle FTM_FRUSTUM_CULL("Frustum Culling");
 static LLTrace::BlockTimerStatHandle FTM_CULL_REBOUND("Cull Rebound Partition");
@@ -777,6 +781,10 @@ F32 LLSpatialPartition::calcDistance(LLSpatialGroup* group, LLCamera& camera)
 		dist = eye.getLength3().getF32();
 	}
 
+    LL_DEBUGS("RiggedBox") << "calcDistance, group " << group << " camera " << origin << " obj bounds " 
+                           << group->mObjectBounds[0] << ", " << group->mObjectBounds[1] 
+                           << " dist " << dist << " radius " << group->mRadius << LL_ENDL;
+
 	if (dist < 16.f)
 	{
 		dist /= 16.f;
@@ -808,7 +816,8 @@ F32 LLSpatialGroup::getUpdateUrgency() const
 BOOL LLSpatialGroup::changeLOD()
 {
 	if (hasState(ALPHA_DIRTY | OBJECT_DIRTY))
-	{ ///a rebuild is going to happen, update distance and LoD
+	{
+		//a rebuild is going to happen, update distance and LoD
 		return TRUE;
 	}
 
@@ -816,8 +825,28 @@ BOOL LLSpatialGroup::changeLOD()
 	{
 		F32 ratio = (mDistance - mLastUpdateDistance)/(llmax(mLastUpdateDistance, mRadius));
 
+        // MAINT-8264 - this check is not robust if it needs to work
+        // for bounding boxes much larger than the actual enclosed
+        // objects, and using distance to box center is also
+        // problematic. Consider the case that you have a large box
+        // where the enclosed object is in one corner. As you zoom in
+        // on the corner, the object gets much closer to the camera,
+        // but the distance to the box center changes very little, and
+        // an LOD change will not trigger, so object LOD gets "stuck"
+        // at a too-low value. In the case of the above JIRA, the box
+        // was large only due to another error, so this logic did not
+        // need to be changed.
+
 		if (fabsf(ratio) >= getSpatialPartition()->mSlopRatio)
 		{
+            LL_DEBUGS("RiggedBox") << "changeLOD true because of ratio compare "
+                                   << fabsf(ratio) << " " << getSpatialPartition()->mSlopRatio << LL_ENDL;
+            LL_DEBUGS("RiggedBox") << "sg " << this << "\nmDistance " << mDistance
+                                   << " mLastUpdateDistance " << mLastUpdateDistance
+                                   << " mRadius " << mRadius
+                                   << " fab ratio " << fabsf(ratio) 
+                                   << " slop " << getSpatialPartition()->mSlopRatio << LL_ENDL;
+       
 			return TRUE;
 		}
 
@@ -869,16 +898,6 @@ void LLSpatialGroup::handleDestruction(const TreeNode* node)
 		}
 	}
 	
-	//clean up avatar attachment stats
-	LLSpatialBridge* bridge = getSpatialPartition()->asBridge();
-	if (bridge)
-	{
-		if (bridge->mAvatar.notNull())
-		{
-			bridge->mAvatar->subtractAttachmentArea(mSurfaceArea );
-		}
-	}
-
 	clearDrawMap();
 	mVertexBuffer = NULL;
 	mBufferMap.clear();
@@ -2119,17 +2138,17 @@ void renderBoundingBox(LLDrawable* drawable, BOOL set_color = TRUE)
 	{
 		if (drawable->isSpatialBridge())
 		{
-			gGL.diffuseColor4f(1,0.5f,0,1);
+			gGL.diffuseColor4f(1,0.5f,0,1); // orange
 		}
 		else if (drawable->getVOVolume())
-		{
-			if (drawable->isRoot())
+		{ 
+            if (drawable->isRoot())
 			{
-				gGL.diffuseColor4f(1,1,0,1);
+				gGL.diffuseColor4f(1,1,0,1); // yellow
 			}
 			else
 			{
-				gGL.diffuseColor4f(0,1,0,1);
+				gGL.diffuseColor4f(0,1,0,1); // green
 			}
 		}
 		else if (drawable->getVObj())
@@ -2137,24 +2156,41 @@ void renderBoundingBox(LLDrawable* drawable, BOOL set_color = TRUE)
 			switch (drawable->getVObj()->getPCode())
 			{
 				case LLViewerObject::LL_VO_SURFACE_PATCH:
-						gGL.diffuseColor4f(0,1,1,1);
+                    	gGL.diffuseColor4f(0,1,1,1); // cyan
 						break;
 				case LLViewerObject::LL_VO_CLOUDS:
 						// no longer used
 						break;
 				case LLViewerObject::LL_VO_PART_GROUP:
 				case LLViewerObject::LL_VO_HUD_PART_GROUP:
-						gGL.diffuseColor4f(0,0,1,1);
+                    	gGL.diffuseColor4f(0,0,1,1); // blue
 						break;
 				case LLViewerObject::LL_VO_VOID_WATER:
 				case LLViewerObject::LL_VO_WATER:
-						gGL.diffuseColor4f(0,0.5f,1,1);
+                    	gGL.diffuseColor4f(0,0.5f,1,1); // medium blue
 						break;
 				case LL_PCODE_LEGACY_TREE:
-						gGL.diffuseColor4f(0,0.5f,0,1);
+                    	gGL.diffuseColor4f(0,0.5f,0,1); // dark green
 						break;
 				default:
-						gGL.diffuseColor4f(1,0,1,1);
+						LLControlAvatar *cav = dynamic_cast<LLControlAvatar*>(drawable->getVObj()->asAvatar());
+						if (cav)
+						{
+							bool has_pos_constraint = (cav->mPositionConstraintFixup != LLVector3());
+							bool has_scale_constraint = (cav->mScaleConstraintFixup != 1.0f);
+							if (has_pos_constraint || has_scale_constraint)
+							{
+								gGL.diffuseColor4f(1,0,0,1); 
+							}
+							else
+							{
+								gGL.diffuseColor4f(0,1,0.5,1); 
+							}
+						}
+						else
+						{
+							gGL.diffuseColor4f(1,0,1,1); // magenta
+						}
 						break;
 			}
 		}
diff --git a/indra/newview/llspatialpartition.h b/indra/newview/llspatialpartition.h
index 6104b92d43..7e65da42f7 100644
--- a/indra/newview/llspatialpartition.h
+++ b/indra/newview/llspatialpartition.h
@@ -468,8 +468,6 @@ public:
 	virtual LLCamera transformCamera(LLCamera& camera);
 	
 	LLDrawable* mDrawable;
-	LLPointer<LLVOAvatar> mAvatar;
-
 };
 
 class LLCullResult 
diff --git a/indra/newview/llstartup.cpp b/indra/newview/llstartup.cpp
index cc02642203..37aaece5d6 100644
--- a/indra/newview/llstartup.cpp
+++ b/indra/newview/llstartup.cpp
@@ -2397,6 +2397,7 @@ void register_viewer_callbacks(LLMessageSystem* msg)
 	msg->setHandlerFuncFast(_PREHASH_NameValuePair,			process_name_value);
 	msg->setHandlerFuncFast(_PREHASH_RemoveNameValuePair,	process_remove_name_value);
 	msg->setHandlerFuncFast(_PREHASH_AvatarAnimation,		process_avatar_animation);
+	msg->setHandlerFuncFast(_PREHASH_ObjectAnimation,		process_object_animation);
 	msg->setHandlerFuncFast(_PREHASH_AvatarAppearance,		process_avatar_appearance);
 	msg->setHandlerFuncFast(_PREHASH_CameraConstraint,		process_camera_constraint);
 	msg->setHandlerFuncFast(_PREHASH_AvatarSitResponse,		process_avatar_sit_response);
diff --git a/indra/newview/lltooldraganddrop.cpp b/indra/newview/lltooldraganddrop.cpp
index 0f38cca56f..f66211ef34 100644
--- a/indra/newview/lltooldraganddrop.cpp
+++ b/indra/newview/lltooldraganddrop.cpp
@@ -785,7 +785,7 @@ void LLToolDragAndDrop::dragOrDrop3D( S32 x, S32 y, MASK mask, BOOL drop, EAccep
 	mDrop = drop;
 	if (mDrop)
 	{
-		// don't allow drag and drop onto transparent objects
+		// don't allow drag and drop onto rigged or transparent objects
 		pick(gViewerWindow->pickImmediate(x, y, FALSE, FALSE));
 	}
 	else
diff --git a/indra/newview/lltoolpie.cpp b/indra/newview/lltoolpie.cpp
index d8f63b9332..5cfb2026e0 100644
--- a/indra/newview/lltoolpie.cpp
+++ b/indra/newview/lltoolpie.cpp
@@ -111,9 +111,9 @@ BOOL LLToolPie::handleMouseDown(S32 x, S32 y, MASK mask)
     mMouseOutsideSlop = FALSE;
 	mMouseDownX = x;
 	mMouseDownY = y;
-
-
-	mPick = gViewerWindow->pickImmediate(x, y, FALSE, FALSE);
+	LLTimer pick_timer;.
+	BOOL pick_rigged = false; //gSavedSettings.getBOOL("AnimatedObjectsAllowLeftClick");
+	mPick = gViewerWindow->pickImmediate(x, y, FALSE, pick_rigged);
 	LLViewerObject *object = mPick.getObject();
 	LLViewerObject *parent = object ? object->getRootEdit() : NULL;
 	if (!object
@@ -125,8 +125,9 @@ BOOL LLToolPie::handleMouseDown(S32 x, S32 y, MASK mask)
 		// left mouse down always picks transparent (but see handleMouseUp).
 		// Also see LLToolPie::handleHover() - priorities are a bit different there.
 		// Todo: we need a more consistent set of rules to work with
-		mPick = gViewerWindow->pickImmediate(x, y, TRUE /*transparent*/, FALSE);
+		mPick = gViewerWindow->pickImmediate(x, y, TRUE /*transparent*/, pick_rigged);
 	}
+	LL_INFOS() << "pick_rigged is " << (S32) pick_rigged << " pick time elapsed " << pick_timer.getElapsedTimeF32() << LL_ENDL;
 
 	mPick.mKeyMask = mask;
 
@@ -142,7 +143,10 @@ BOOL LLToolPie::handleMouseDown(S32 x, S32 y, MASK mask)
 BOOL LLToolPie::handleRightMouseDown(S32 x, S32 y, MASK mask)
 {
 	// don't pick transparent so users can't "pay" transparent objects
-	mPick = gViewerWindow->pickImmediate(x, y, /*BOOL pick_transparent*/ FALSE, /*BOOL pick_rigged*/ TRUE, /*BOOL pick_particle*/ TRUE);
+	mPick = gViewerWindow->pickImmediate(x, y,
+                                         /*BOOL pick_transparent*/ FALSE,
+                                         /*BOOL pick_rigged*/ TRUE,
+                                         /*BOOL pick_particle*/ TRUE);
 	mPick.mKeyMask = mask;
 
 	// claim not handled so UI focus stays same
@@ -558,7 +562,8 @@ void LLToolPie::selectionPropertiesReceived()
 
 BOOL LLToolPie::handleHover(S32 x, S32 y, MASK mask)
 {
-	mHoverPick = gViewerWindow->pickImmediate(x, y, FALSE, FALSE);
+    BOOL pick_rigged = false; //gSavedSettings.getBOOL("AnimatedObjectsAllowLeftClick");
+	mHoverPick = gViewerWindow->pickImmediate(x, y, FALSE, pick_rigged);
 	LLViewerObject *parent = NULL;
 	LLViewerObject *object = mHoverPick.getObject();
 	LLSelectMgr::getInstance()->setHoverObject(object, mHoverPick.mObjectFace);
@@ -604,7 +609,7 @@ BOOL LLToolPie::handleHover(S32 x, S32 y, MASK mask)
 	else
 	{
 		// perform a separate pick that detects transparent objects since they respond to 1-click actions
-		LLPickInfo click_action_pick = gViewerWindow->pickImmediate(x, y, TRUE, FALSE);
+		LLPickInfo click_action_pick = gViewerWindow->pickImmediate(x, y, TRUE, pick_rigged);
 
 		LLViewerObject* click_action_object = click_action_pick.getObject();
 
@@ -690,6 +695,7 @@ BOOL LLToolPie::handleMouseUp(S32 x, S32 y, MASK mask)
         LLPickInfo savedPick = mPick;
         mPick = gViewerWindow->pickImmediate(savedPick.mMousePt.mX, savedPick.mMousePt.mY,
                                              FALSE /* ignore transparent */,
+                                             FALSE /* ignore rigged */,
                                              FALSE /* ignore particles */);
 
         if (!mPick.mPosGlobal.isExactlyZero()			// valid coordinates for pick
@@ -779,6 +785,7 @@ BOOL LLToolPie::handleDoubleClick(S32 x, S32 y, MASK mask)
         LLPickInfo savedPick = mPick;
         mPick = gViewerWindow->pickImmediate(savedPick.mMousePt.mX, savedPick.mMousePt.mY,
                                              FALSE /* ignore transparent */,
+                                             FALSE /* ignore rigged */,
                                              FALSE /* ignore particles */);
 
         if(mPick.mPickType == LLPickInfo::PICK_OBJECT)
@@ -1771,8 +1778,7 @@ BOOL LLToolPie::handleRightClickPick()
 		gMenuHolder->setObjectSelection(LLSelectMgr::getInstance()->getSelection());
 
 		bool is_other_attachment = (object->isAttachment() && !object->isHUDAttachment() && !object->permYouOwner());
-		if (object->isAvatar() 
-			|| is_other_attachment)
+		if (object->isAvatar() || is_other_attachment)
 		{
 			// Find the attachment's avatar
 			while( object && object->isAttachment())
diff --git a/indra/newview/lltoolselect.cpp b/indra/newview/lltoolselect.cpp
index c22eb48eef..e52bc0b015 100644
--- a/indra/newview/lltoolselect.cpp
+++ b/indra/newview/lltoolselect.cpp
@@ -64,7 +64,8 @@ LLToolSelect::LLToolSelect( LLToolComposite* composite )
 BOOL LLToolSelect::handleMouseDown(S32 x, S32 y, MASK mask)
 {
 	// do immediate pick query
-	mPick = gViewerWindow->pickImmediate(x, y, TRUE, FALSE);
+    BOOL pick_rigged = false; //gSavedSettings.getBOOL("AnimatedObjectsAllowLeftClick");
+	mPick = gViewerWindow->pickImmediate(x, y, TRUE, pick_rigged);
 
 	// Pass mousedown to agent
 	LLTool::handleMouseDown(x, y, mask);
diff --git a/indra/newview/lltoolselectrect.cpp b/indra/newview/lltoolselectrect.cpp
index 71dc8001d4..bae32f7bc0 100644
--- a/indra/newview/lltoolselectrect.cpp
+++ b/indra/newview/lltoolselectrect.cpp
@@ -71,7 +71,8 @@ void dialog_refresh_all(void);
 
 BOOL LLToolSelectRect::handleMouseDown(S32 x, S32 y, MASK mask)
 {
-	handlePick(gViewerWindow->pickImmediate(x, y, TRUE, FALSE));
+    BOOL pick_rigged = false; //gSavedSettings.getBOOL("AnimatedObjectsAllowLeftClick");
+	handlePick(gViewerWindow->pickImmediate(x, y, TRUE /* pick_transparent */, pick_rigged));
 
 	LLTool::handleMouseDown(x, y, mask);
 
diff --git a/indra/newview/lluiavatar.cpp b/indra/newview/lluiavatar.cpp
new file mode 100644
index 0000000000..e4e266c92a
--- /dev/null
+++ b/indra/newview/lluiavatar.cpp
@@ -0,0 +1,61 @@
+/**
+ * @file lluiavatar.cpp
+ * @brief Implementation for special dummy avatar used in some UI views
+ *
+ * $LicenseInfo:firstyear=2017&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2017, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+#include "lluiavatar.h"
+#include "llagent.h" //  Get state values from here
+#include "llviewerobjectlist.h"
+#include "pipeline.h"
+#include "llanimationstates.h"
+#include "llviewercontrol.h"
+#include "llmeshrepository.h"
+#include "llviewerregion.h"
+
+LLUIAvatar::LLUIAvatar(const LLUUID& id, const LLPCode pcode, LLViewerRegion* regionp) :
+    LLVOAvatar(id, pcode, regionp)
+{
+    mIsDummy = TRUE;
+    mIsUIAvatar = true;
+}
+
+// virtual
+LLUIAvatar::~LLUIAvatar()
+{
+}
+
+// virtual
+void LLUIAvatar::initInstance()
+{
+    LLVOAvatar::initInstance();
+
+    createDrawable( &gPipeline );
+	setPositionAgent(LLVector3::zero);
+	slamPosition();
+	updateJointLODs();
+	updateGeometry(mDrawable);
+
+    mInitFlags |= 1<<3;
+}
diff --git a/indra/newview/lluiavatar.h b/indra/newview/lluiavatar.h
new file mode 100644
index 0000000000..bcdffedef2
--- /dev/null
+++ b/indra/newview/lluiavatar.h
@@ -0,0 +1,44 @@
+/**
+ * @file lluiavatar.h
+ * @brief Special dummy avatar used in some UI views
+ *
+ * $LicenseInfo:firstyear=2017&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2017, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_UIAVATAR_H
+#define LL_UIAVATAR_H
+
+#include "llvoavatar.h"
+#include "llvovolume.h"
+
+class LLUIAvatar:
+    public LLVOAvatar
+{
+    LOG_CLASS(LLUIAvatar);
+
+public:
+    LLUIAvatar(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
+	virtual void 			initInstance(); // Called after construction to initialize the class.
+	virtual	~LLUIAvatar();
+};
+
+#endif //LL_CONTROLAVATAR_H
diff --git a/indra/newview/llviewerjointattachment.cpp b/indra/newview/llviewerjointattachment.cpp
index 66e392ac42..cf9243a871 100644
--- a/indra/newview/llviewerjointattachment.cpp
+++ b/indra/newview/llviewerjointattachment.cpp
@@ -357,6 +357,25 @@ void LLViewerJointAttachment::setOriginalPosition(LLVector3& position)
 }
 
 //-----------------------------------------------------------------------------
+// getNumAnimatedObjects()
+//-----------------------------------------------------------------------------
+S32 LLViewerJointAttachment::getNumAnimatedObjects() const
+{
+    S32 count = 0;
+	for (attachedobjs_vec_t::const_iterator iter = mAttachedObjects.begin();
+		 iter != mAttachedObjects.end();
+		 ++iter)
+	{
+        const LLViewerObject *attached_object = *iter;
+        if (attached_object->isAnimatedObject())
+        {
+            count++;
+        }
+    }
+    return count;
+}
+
+//-----------------------------------------------------------------------------
 // clampObjectPosition()
 //-----------------------------------------------------------------------------
 void LLViewerJointAttachment::clampObjectPosition()
diff --git a/indra/newview/llviewerjointattachment.h b/indra/newview/llviewerjointattachment.h
index 9addafaee1..9641ab4208 100644
--- a/indra/newview/llviewerjointattachment.h
+++ b/indra/newview/llviewerjointattachment.h
@@ -77,6 +77,7 @@ public:
 	S32 getGroup() const { return mGroup; }
 	S32 getPieSlice() const { return mPieSlice; }
 	S32	getNumObjects() const { return mAttachedObjects.size(); }
+	S32	getNumAnimatedObjects() const;
 
 	void clampObjectPosition();
 
diff --git a/indra/newview/llviewermenu.cpp b/indra/newview/llviewermenu.cpp
index ec851ddaf9..6c52f118ad 100644
--- a/indra/newview/llviewermenu.cpp
+++ b/indra/newview/llviewermenu.cpp
@@ -964,7 +964,7 @@ class LLAdvancedSetDisplayTextureDensity : public view_listener_t
 //////////////////
 // INFO DISPLAY //
 //////////////////
-U32 info_display_from_string(std::string info_display)
+U64 info_display_from_string(std::string info_display)
 {
 	if ("verify" == info_display)
 	{
@@ -1078,6 +1078,14 @@ U32 info_display_from_string(std::string info_display)
 	{
 		return LLPipeline::RENDER_DEBUG_TEXEL_DENSITY;
 	}
+	else if ("triangle count" == info_display)
+	{
+		return LLPipeline::RENDER_DEBUG_TRIANGLE_COUNT;
+	}
+	else if ("impostors" == info_display)
+	{
+		return LLPipeline::RENDER_DEBUG_IMPOSTORS;
+	}
 	else
 	{
 		LL_WARNS() << "unrecognized feature name '" << info_display << "'" << LL_ENDL;
@@ -1089,7 +1097,7 @@ class LLAdvancedToggleInfoDisplay : public view_listener_t
 {
 	bool handleEvent(const LLSD& userdata)
 	{
-		U32 info_display = info_display_from_string( userdata.asString() );
+		U64 info_display = info_display_from_string( userdata.asString() );
 
 		LL_INFOS("ViewerMenu") << "toggle " << userdata.asString() << LL_ENDL;
 		
@@ -1107,7 +1115,7 @@ class LLAdvancedCheckInfoDisplay : public view_listener_t
 {
 	bool handleEvent(const LLSD& userdata)
 	{
-		U32 info_display = info_display_from_string( userdata.asString() );
+		U64 info_display = info_display_from_string( userdata.asString() );
 		bool new_value = false;
 
 		if ( info_display != 0 )
@@ -1617,7 +1625,24 @@ class LLAdvancedEnableAppearanceToXML : public view_listener_t
 {
 	bool handleEvent(const LLSD& userdata)
 	{
-		return gSavedSettings.getBOOL("DebugAvatarAppearanceMessage");
+        LLViewerObject *obj = LLSelectMgr::getInstance()->getSelection()->getPrimaryObject();
+        if (obj && obj->isAnimatedObject() && obj->getControlAvatar())
+        {
+            return gSavedSettings.getBOOL("DebugAnimatedObjects");
+        }
+        else if (obj && obj->isAttachment() && obj->getAvatar())
+        {
+            return gSavedSettings.getBOOL("DebugAvatarAppearanceMessage");
+        }
+        else if (obj && obj->isAvatar())
+        {
+            // This has to be a non-control avatar, because control avs are invisible and unclickable.
+            return gSavedSettings.getBOOL("DebugAvatarAppearanceMessage");
+        }
+		else
+		{
+			return false;
+		}
 	}
 };
 
@@ -1626,13 +1651,34 @@ class LLAdvancedAppearanceToXML : public view_listener_t
 	bool handleEvent(const LLSD& userdata)
 	{
 		std::string emptyname;
-		LLVOAvatar* avatar =
-			find_avatar_from_object( LLSelectMgr::getInstance()->getSelection()->getPrimaryObject() );
-		if (!avatar)
-		{
+        LLViewerObject *obj = LLSelectMgr::getInstance()->getSelection()->getPrimaryObject();
+        LLVOAvatar *avatar = NULL;
+        if (obj)
+        {
+            if (obj->isAvatar())
+            {
+                avatar = obj->asAvatar();
+            }
+            else
+            {
+                // If there is a selection, find the associated
+                // avatar. Normally there's only one obvious choice. But
+                // what should be returned if the object is in an attached
+                // animated object? getAvatar() will give the skeleton of
+                // the animated object. getAvatarAncestor() will give the
+                // actual human-driven avatar.
+                avatar = obj->getAvatar();
+            }
+        }
+        else
+        {
+            // If no selection, use the self avatar.
 			avatar = gAgentAvatarp;
-		}
-		avatar->dumpArchetypeXML(emptyname);
+        }
+        if (avatar)
+        {
+            avatar->dumpArchetypeXML(emptyname);
+        }
 		return true;
 	}
 };
@@ -6058,7 +6104,12 @@ class LLAvatarResetSkeleton: public view_listener_t
 {
     bool handleEvent(const LLSD& userdata)
     {
-		LLVOAvatar* avatar = find_avatar_from_object( LLSelectMgr::getInstance()->getSelection()->getPrimaryObject() );
+		LLVOAvatar* avatar = NULL;
+        LLViewerObject *obj = LLSelectMgr::getInstance()->getSelection()->getPrimaryObject();
+        if (obj)
+        {
+            avatar = obj->getAvatar();
+        }
 		if(avatar)
         {
             avatar->resetSkeleton(false);
@@ -6067,6 +6118,20 @@ class LLAvatarResetSkeleton: public view_listener_t
     }
 };
 
+class LLAvatarEnableResetSkeleton: public view_listener_t
+{
+    bool handleEvent(const LLSD& userdata)
+    {
+        LLViewerObject *obj = LLSelectMgr::getInstance()->getSelection()->getPrimaryObject();
+        if (obj && obj->getAvatar())
+        {
+            return true;
+        }
+        return false;
+    }
+};
+
+
 class LLAvatarResetSkeletonAndAnimations : public view_listener_t
 {
 	bool handleEvent(const LLSD& userdata)
@@ -6900,7 +6965,7 @@ class LLAttachmentEnableDrop : public view_listener_t
 		// Do not enable drop if all faces of object are not enabled
 		if (object && LLSelectMgr::getInstance()->getSelection()->contains(object,SELECT_ALL_TES ))
 		{
-    		S32 attachmentID  = ATTACHMENT_ID_FROM_STATE(object->getState());
+    		S32 attachmentID  = ATTACHMENT_ID_FROM_STATE(object->getAttachmentState());
 			attachment = get_if_there(gAgentAvatarp->mAttachmentPoints, attachmentID, (LLViewerJointAttachment*)NULL);
 
 			if (attachment)
@@ -9109,6 +9174,7 @@ void initialize_menus()
 	view_listener_t::addMenu(new LLAvatarReportAbuse(), "Avatar.ReportAbuse");
 	view_listener_t::addMenu(new LLAvatarToggleMyProfile(), "Avatar.ToggleMyProfile");
 	view_listener_t::addMenu(new LLAvatarResetSkeleton(), "Avatar.ResetSkeleton");
+	view_listener_t::addMenu(new LLAvatarEnableResetSkeleton(), "Avatar.EnableResetSkeleton");
 	view_listener_t::addMenu(new LLAvatarResetSkeletonAndAnimations(), "Avatar.ResetSkeletonAndAnimations");
 	enable.add("Avatar.IsMyProfileOpen", boost::bind(&my_profile_visible));
 
diff --git a/indra/newview/llviewermenu.h b/indra/newview/llviewermenu.h
index 7abb0c8e74..6882405407 100644
--- a/indra/newview/llviewermenu.h
+++ b/indra/newview/llviewermenu.h
@@ -143,7 +143,7 @@ void handle_export_selected( void * );
 // Convert strings to internal types
 U32 render_type_from_string(std::string render_type);
 U32 feature_from_string(std::string feature);
-U32 info_display_from_string(std::string info_display);
+U64 info_display_from_string(std::string info_display);
 
 class LLViewerMenuHolderGL : public LLMenuHolderGL
 {
diff --git a/indra/newview/llviewermessage.cpp b/indra/newview/llviewermessage.cpp
index 0c5bd9ad1d..981d226824 100644
--- a/indra/newview/llviewermessage.cpp
+++ b/indra/newview/llviewermessage.cpp
@@ -54,6 +54,7 @@
 #include "llagentcamera.h"
 #include "llcallingcard.h"
 #include "llbuycurrencyhtml.h"
+#include "llcontrolavatar.h"
 #include "llfirstuse.h"
 #include "llfloaterbump.h"
 #include "llfloaterbuyland.h"
@@ -102,6 +103,7 @@
 #include "llviewerwindow.h"
 #include "llvlmanager.h"
 #include "llvoavatarself.h"
+#include "llvovolume.h"
 #include "llworld.h"
 #include "pipeline.h"
 #include "llfloaterworldmap.h"
@@ -4023,23 +4025,27 @@ void process_avatar_animation(LLMessageSystem *mesgsys, void **user_data)
 	LLUUID	animation_id;
 	LLUUID	uuid;
 	S32		anim_sequence_id;
-	LLVOAvatar *avatarp;
+	LLVOAvatar *avatarp = NULL;
 	
 	mesgsys->getUUIDFast(_PREHASH_Sender, _PREHASH_ID, uuid);
 
-	//clear animation flags
-	avatarp = (LLVOAvatar *)gObjectList.findObject(uuid);
+	LLViewerObject *objp = gObjectList.findObject(uuid);
+    if (objp)
+    {
+        avatarp =  objp->asAvatar();
+    }
 
 	if (!avatarp)
 	{
 		// no agent by this ID...error?
-		LL_WARNS("Messaging") << "Received animation state for unknown avatar" << uuid << LL_ENDL;
+		LL_WARNS("Messaging") << "Received animation state for unknown avatar " << uuid << LL_ENDL;
 		return;
 	}
 
 	S32 num_blocks = mesgsys->getNumberOfBlocksFast(_PREHASH_AnimationList);
 	S32 num_source_blocks = mesgsys->getNumberOfBlocksFast(_PREHASH_AnimationSourceList);
 
+	//clear animation flags
 	avatarp->mSignaledAnimations.clear();
 	
 	if (avatarp->isSelf())
@@ -4110,6 +4116,72 @@ void process_avatar_animation(LLMessageSystem *mesgsys, void **user_data)
 	}
 }
 
+
+void process_object_animation(LLMessageSystem *mesgsys, void **user_data)
+{
+	LLUUID	animation_id;
+	LLUUID	uuid;
+	S32		anim_sequence_id;
+	
+	mesgsys->getUUIDFast(_PREHASH_Sender, _PREHASH_ID, uuid);
+
+    LL_DEBUGS("AnimatedObjectsNotify") << "Received animation state for object " << uuid << LL_ENDL;
+
+    signaled_animation_map_t signaled_anims;
+	S32 num_blocks = mesgsys->getNumberOfBlocksFast(_PREHASH_AnimationList);
+	LL_DEBUGS("AnimatedObjectsNotify") << "processing object animation requests, num_blocks " << num_blocks << " uuid " << uuid << LL_ENDL;
+    for( S32 i = 0; i < num_blocks; i++ )
+    {
+        mesgsys->getUUIDFast(_PREHASH_AnimationList, _PREHASH_AnimID, animation_id, i);
+        mesgsys->getS32Fast(_PREHASH_AnimationList, _PREHASH_AnimSequenceID, anim_sequence_id, i);
+        signaled_anims[animation_id] = anim_sequence_id;
+        LL_DEBUGS("AnimatedObjectsNotify") << "added signaled_anims animation request for object " 
+                                    << uuid << " animation id " << animation_id << LL_ENDL;
+    }
+    LLObjectSignaledAnimationMap::instance().getMap()[uuid] = signaled_anims;
+    
+    LLViewerObject *objp = gObjectList.findObject(uuid);
+    if (!objp)
+    {
+		LL_DEBUGS("AnimatedObjectsNotify") << "Received animation state for unknown object " << uuid << LL_ENDL;
+        return;
+    }
+    
+	LLVOVolume *volp = dynamic_cast<LLVOVolume*>(objp);
+    if (!volp)
+    {
+		LL_DEBUGS("AnimatedObjectsNotify") << "Received animation state for non-volume object " << uuid << LL_ENDL;
+        return;
+    }
+
+    if (!volp->isAnimatedObject())
+    {
+		LL_DEBUGS("AnimatedObjectsNotify") << "Received animation state for non-animated object " << uuid << LL_ENDL;
+        return;
+    }
+
+    volp->updateControlAvatar();
+    LLControlAvatar *avatarp = volp->getControlAvatar();
+    if (!avatarp)
+    {
+        LL_DEBUGS("AnimatedObjectsNotify") << "Received animation request for object with no control avatar, ignoring " << uuid << LL_ENDL;
+        return;
+    }
+    
+    if (!avatarp->mPlaying)
+    {
+        avatarp->mPlaying = true;
+        //if (!avatarp->mRootVolp->isAnySelected())
+        {
+            avatarp->updateVolumeGeom();
+            avatarp->mRootVolp->recursiveMarkForUpdate(TRUE);
+        }
+    }
+        
+    avatarp->updateAnimations();
+}
+
+
 void process_avatar_appearance(LLMessageSystem *mesgsys, void **user_data)
 {
 	LLUUID uuid;
diff --git a/indra/newview/llviewermessage.h b/indra/newview/llviewermessage.h
index 913abef2be..2d6636f30d 100644
--- a/indra/newview/llviewermessage.h
+++ b/indra/newview/llviewermessage.h
@@ -100,6 +100,7 @@ void process_health_message(LLMessageSystem *mesgsys, void **user_data);
 void process_sim_stats(LLMessageSystem *mesgsys, void **user_data);
 void process_shooter_agent_hit(LLMessageSystem* msg, void** user_data);
 void process_avatar_animation(LLMessageSystem *mesgsys, void **user_data);
+void process_object_animation(LLMessageSystem *mesgsys, void **user_data);
 void process_avatar_appearance(LLMessageSystem *mesgsys, void **user_data);
 void process_camera_constraint(LLMessageSystem *mesgsys, void **user_data);
 void process_avatar_sit_response(LLMessageSystem *mesgsys, void **user_data);
diff --git a/indra/newview/llviewerobject.cpp b/indra/newview/llviewerobject.cpp
index 035087d52e..1e46a1cf9e 100644
--- a/indra/newview/llviewerobject.cpp
+++ b/indra/newview/llviewerobject.cpp
@@ -60,6 +60,7 @@
 #include "llbbox.h"
 #include "llbox.h"
 #include "llcylinder.h"
+#include "llcontrolavatar.h"
 #include "lldrawable.h"
 #include "llface.h"
 #include "llfloaterproperties.h"
@@ -69,6 +70,7 @@
 #include "llselectmgr.h"
 #include "llrendersphere.h"
 #include "lltooldraganddrop.h"
+#include "lluiavatar.h"
 #include "llviewercamera.h"
 #include "llviewertexturelist.h"
 #include "llviewerinventory.h"
@@ -103,6 +105,8 @@
 #include "llfloaterperms.h"
 #include "llvocache.h"
 #include "llcleanup.h"
+#include "llcallstack.h"
+#include "llmeshrepository.h"
 
 //#define DEBUG_UPDATE_TYPE
 
@@ -140,8 +144,11 @@ const S32 MAX_OBJECT_BINARY_DATA_SIZE = 60 + 16;
 static LLTrace::BlockTimerStatHandle FTM_CREATE_OBJECT("Create Object");
 
 // static
-LLViewerObject *LLViewerObject::createObject(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
+LLViewerObject *LLViewerObject::createObject(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp, S32 flags)
 {
+    LL_DEBUGS("ObjectUpdate") << "creating " << id << LL_ENDL;
+    dumpStack("ObjectUpdateStack");
+    
 	LLViewerObject *res = NULL;
 	LL_RECORD_BLOCK_TIME(FTM_CREATE_OBJECT);
 	
@@ -168,6 +175,18 @@ LLViewerObject *LLViewerObject::createObject(const LLUUID &id, const LLPCode pco
 			}
 			res = gAgentAvatarp;
 		}
+		else if (flags & CO_FLAG_CONTROL_AVATAR)
+		{
+            LLControlAvatar *control_avatar = new LLControlAvatar(id, pcode, regionp);
+			control_avatar->initInstance();
+			res = control_avatar;
+		}
+        else if (flags & CO_FLAG_UI_AVATAR)
+        {
+            LLUIAvatar *ui_avatar = new LLUIAvatar(id, pcode, regionp);
+            ui_avatar->initInstance();
+            res = ui_avatar;
+        }
 		else
 		{
 			LLVOAvatar *avatar = new LLVOAvatar(id, pcode, regionp); 
@@ -237,6 +256,7 @@ LLViewerObject::LLViewerObject(const LLUUID &id, const LLPCode pcode, LLViewerRe
 	mText(),
 	mHudText(""),
 	mHudTextColor(LLColor4::white),
+    mControlAvatar(NULL),
 	mLastInterpUpdateSecs(0.f),
 	mLastMessageUpdateSecs(0.f),
 	mLatestRecvPacketID(0),
@@ -261,7 +281,7 @@ LLViewerObject::LLViewerObject(const LLUUID &id, const LLPCode pcode, LLViewerRe
 	mRotTime(0.f),
 	mAngularVelocityRot(),
 	mPreviousRotation(),
-	mState(0),
+	mAttachmentState(0),
 	mMedia(NULL),
 	mClickAction(0),
 	mObjectCost(0),
@@ -367,17 +387,23 @@ void LLViewerObject::markDead()
 		//LL_INFOS() << "Marking self " << mLocalID << " as dead." << LL_ENDL;
 		
 		// Root object of this hierarchy unlinks itself.
-		LLVOAvatar *av = getAvatarAncestor();
 		if (getParent())
 		{
 			((LLViewerObject *)getParent())->removeChild(this);
 		}
 		LLUUID mesh_id;
-		if (av && LLVOAvatar::getRiggedMeshID(this,mesh_id))
-		{
-			// This case is needed for indirectly attached mesh objects.
-			av->resetJointsOnDetach(mesh_id);
-		}
+        {
+            LLVOAvatar *av = getAvatar();
+            if (av && LLVOAvatar::getRiggedMeshID(this,mesh_id))
+            {
+                // This case is needed for indirectly attached mesh objects.
+                av->updateAttachmentOverrides();
+            }
+        }
+        if (getControlAvatar())
+        {
+            unlinkControlAvatar();
+        }
 
 		// Mark itself as dead
 		mDead = TRUE;
@@ -678,6 +704,18 @@ void LLViewerObject::setNameValueList(const std::string& name_value_list)
 	}
 }
 
+BOOL LLViewerObject::isAnySelected() const
+{
+    bool any_selected = isSelected();
+    for (child_list_t::const_iterator iter = mChildList.begin();
+         iter != mChildList.end(); iter++)
+    {
+        const LLViewerObject* child = *iter;
+        any_selected = any_selected || child->isSelected();
+    }
+    return any_selected;
+}
+
 void LLViewerObject::setSelected(BOOL sel)
 {
 	mUserSelected = sel;
@@ -850,9 +888,18 @@ void LLViewerObject::addChild(LLViewerObject *childp)
 	if(childp->setParent(this))
 	{
 		mChildList.push_back(childp);
+        childp->afterReparent();
 	}
 }
 
+void LLViewerObject::onReparent(LLViewerObject *old_parent, LLViewerObject *new_parent)
+{
+}
+
+void LLViewerObject::afterReparent()
+{
+}
+
 void LLViewerObject::removeChild(LLViewerObject *childp)
 {
 	for (child_list_t::iterator i = mChildList.begin(); i != mChildList.end(); ++i)
@@ -1069,6 +1116,9 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 {
 	LL_DEBUGS_ONCE("SceneLoadTiming") << "Received viewer object data" << LL_ENDL;
 
+    LL_DEBUGS("ObjectUpdate") << " mesgsys " << mesgsys << " dp " << dp << " id " << getID() << " update_type " << (S32) update_type << LL_ENDL;
+    dumpStack("ObjectUpdateStack");
+
 	U32 retval = 0x0;
 	
 	// If region is removed from the list it is also deleted.
@@ -1123,10 +1173,10 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 	F32 time_dilation = 1.f;
 	if(mesgsys != NULL)
 	{
-	U16 time_dilation16;
-	mesgsys->getU16Fast(_PREHASH_RegionData, _PREHASH_TimeDilation, time_dilation16);
-	time_dilation = ((F32) time_dilation16) / 65535.f;
-	mRegionp->setTimeDilation(time_dilation);
+        U16 time_dilation16;
+        mesgsys->getU16Fast(_PREHASH_RegionData, _PREHASH_TimeDilation, time_dilation16);
+        time_dilation = ((F32) time_dilation16) / 65535.f;
+        mRegionp->setTimeDilation(time_dilation);
 	}
 
 	// this will be used to determine if we've really changed position
@@ -1384,7 +1434,7 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 
 				U8 state;
 				mesgsys->getU8Fast(_PREHASH_ObjectData, _PREHASH_State, state, block_num );
-				mState = state;
+				mAttachmentState = state;
 
 				// ...new objects that should come in selected need to be added to the selected list
 				mCreateSelected = ((flags & FLAGS_CREATE_SELECTED) != 0);
@@ -1654,7 +1704,7 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 
 				U8 state;
 				mesgsys->getU8Fast(_PREHASH_ObjectData, _PREHASH_State, state, block_num );
-				mState = state;
+				mAttachmentState = state;
 				break;
 			}
 
@@ -1677,7 +1727,7 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 		U8		state;
 
 		dp->unpackU8(state, "State");
-		mState = state;
+		mAttachmentState = state;
 
 		switch(update_type)
 		{
@@ -2910,6 +2960,131 @@ void LLViewerObject::fetchInventoryFromServer()
 	}
 }
 
+LLControlAvatar *LLViewerObject::getControlAvatar()
+{
+    return getRootEdit()->mControlAvatar.get();
+}
+
+LLControlAvatar *LLViewerObject::getControlAvatar() const
+{
+    return getRootEdit()->mControlAvatar.get();
+}
+
+// Manage the control avatar state of a given object.
+// Any object can be flagged as animated, but for performance reasons
+// we don't want to incur the overhead of managing a control avatar
+// unless this would have some user-visible consequence. That is,
+// there should be at least one rigged mesh in the linkset. Operations
+// that change the state of a linkset, such as linking or unlinking
+// prims, can also mean that a control avatar needs to be added or
+// removed. At the end, if there is a control avatar, we make sure
+// that its animation state is current.
+void LLViewerObject::updateControlAvatar()
+{
+    LLViewerObject *root = getRootEdit();
+    bool is_animated_object = root->isAnimatedObject();
+    bool has_control_avatar = getControlAvatar();
+    if (!is_animated_object && !has_control_avatar)
+    {
+        return;
+    }
+
+    bool should_have_control_avatar = false;
+    if (is_animated_object)
+    {
+        bool any_rigged_mesh = root->isRiggedMesh();
+        LLViewerObject::const_child_list_t& child_list = root->getChildren();
+        for (LLViewerObject::const_child_list_t::const_iterator iter = child_list.begin();
+             iter != child_list.end(); ++iter)
+        {
+            const LLViewerObject* child = *iter;
+            any_rigged_mesh = any_rigged_mesh || child->isRiggedMesh();
+        }
+        should_have_control_avatar = is_animated_object && any_rigged_mesh;
+    }
+
+    if (should_have_control_avatar && !has_control_avatar)
+    {
+        std::string vobj_name = llformat("Vol%p", root);
+        LL_DEBUGS("AnimatedObjects") << vobj_name << " calling linkControlAvatar()" << LL_ENDL;
+        root->linkControlAvatar();
+    }
+    if (!should_have_control_avatar && has_control_avatar)
+    {
+        std::string vobj_name = llformat("Vol%p", root);
+        LL_DEBUGS("AnimatedObjects") << vobj_name << " calling unlinkControlAvatar()" << LL_ENDL;
+        root->unlinkControlAvatar();
+    }
+    if (getControlAvatar())
+    {
+        getControlAvatar()->updateAnimations();
+        if (isSelected())
+        {
+            LLSelectMgr::getInstance()->pauseAssociatedAvatars();
+        }
+    }
+}
+
+void LLViewerObject::linkControlAvatar()
+{
+    if (!getControlAvatar() && isRootEdit())
+    {
+        LLVOVolume *volp = dynamic_cast<LLVOVolume*>(this);
+        if (!volp)
+        {
+            LL_WARNS() << "called with null or non-volume object" << LL_ENDL;
+            return;
+        }
+        mControlAvatar = LLControlAvatar::createControlAvatar(volp);
+        LL_DEBUGS("AnimatedObjects") << volp->getID() 
+                                     << " created control av for " 
+                                     << (S32) (1+volp->numChildren()) << " prims" << LL_ENDL;
+    }
+    LLControlAvatar *cav = getControlAvatar();
+    if (cav)
+    {
+        cav->updateAttachmentOverrides();
+        if (!cav->mPlaying)
+        {
+            cav->mPlaying = true;
+            //if (!cav->mRootVolp->isAnySelected())
+            {
+                cav->updateVolumeGeom();
+                cav->mRootVolp->recursiveMarkForUpdate(TRUE);
+            }
+        }
+    }
+    else
+    {
+        LL_WARNS() << "no control avatar found!" << LL_ENDL;
+    }
+}
+
+void LLViewerObject::unlinkControlAvatar()
+{
+    if (getControlAvatar())
+    {
+        getControlAvatar()->updateAttachmentOverrides();
+    }
+    if (isRootEdit())
+    {
+        // This will remove the entire linkset from the control avatar
+        if (mControlAvatar)
+        {
+            mControlAvatar->markForDeath();
+            mControlAvatar = NULL;
+        }
+    }
+    // For non-root prims, removing from the linkset will
+    // automatically remove the control avatar connection.
+}
+
+// virtual
+bool LLViewerObject::isAnimatedObject() const
+{
+    return false;
+}
+
 struct LLFilenameAndTask
 {
 	LLUUID mTaskID;
@@ -3534,11 +3709,66 @@ F32 LLViewerObject::getLinksetPhysicsCost()
 	return mLinksetPhysicsCost;
 }
 
-F32 LLViewerObject::getStreamingCost(S32* bytes, S32* visible_bytes, F32* unscaled_value) const
+F32 LLViewerObject::recursiveGetEstTrianglesMax() const
+{
+    F32 est_tris = getEstTrianglesMax();
+    for (child_list_t::const_iterator iter = mChildList.begin();
+         iter != mChildList.end(); iter++)
+    {
+        const LLViewerObject* child = *iter;
+        if (!child->isAvatar())
+        {
+            est_tris += child->recursiveGetEstTrianglesMax();
+        }
+    }
+    return est_tris;
+}
+
+S32 LLViewerObject::getAnimatedObjectMaxTris() const
+{
+    S32 max_tris = 0;
+    if (gSavedSettings.getBOOL("AnimatedObjectsIgnoreLimits")) 
+    {
+        max_tris = S32_MAX;
+    }
+    else
+    {
+        if (gAgent.getRegion())
+        {
+            LLSD features;
+            gAgent.getRegion()->getSimulatorFeatures(features);
+            if (features.has("AnimatedObjects"))
+            {
+                max_tris = features["AnimatedObjects"]["AnimatedObjectMaxTris"].asInteger();
+            }
+        }
+    }
+    return max_tris;
+}
+
+F32 LLViewerObject::getEstTrianglesMax() const
+{
+    return 0.f;
+}
+
+F32 LLViewerObject::getEstTrianglesStreamingCost() const
+{
+    return 0.f;
+}
+
+// virtual
+F32 LLViewerObject::getStreamingCost() const
 {
 	return 0.f;
 }
 
+// virtual
+bool LLViewerObject::getCostData(LLMeshCostData& costs) const
+{
+    costs = LLMeshCostData();
+    return false;
+}
+
 U32 LLViewerObject::getTriangleCount(S32* vcount) const
 {
 	return 0;
@@ -3549,6 +3779,58 @@ U32 LLViewerObject::getHighLODTriangleCount()
 	return 0;
 }
 
+U32 LLViewerObject::recursiveGetTriangleCount(S32* vcount) const
+{
+    S32 total_tris = getTriangleCount(vcount);
+    LLViewerObject::const_child_list_t& child_list = getChildren();
+    for (LLViewerObject::const_child_list_t::const_iterator iter = child_list.begin();
+         iter != child_list.end(); ++iter)
+    {
+        LLViewerObject* childp = *iter;
+        if (childp)
+        {
+            total_tris += childp->getTriangleCount(vcount);
+        }
+    }
+    return total_tris;
+}
+
+// This is using the stored surface area for each volume (which
+// defaults to 1.0 for the case of everything except a sculpt) and
+// then scaling it linearly based on the largest dimension in the
+// prim's scale. Should revisit at some point.
+F32 LLViewerObject::recursiveGetScaledSurfaceArea() const
+{
+    F32 area = 0.f;
+    const LLDrawable* drawable = mDrawable;
+    if (drawable)
+    {
+        const LLVOVolume* volume = drawable->getVOVolume();
+        if (volume)
+        {
+            if (volume->getVolume())
+            {
+				const LLVector3& scale = volume->getScale();
+                area += volume->getVolume()->getSurfaceArea() * llmax(llmax(scale.mV[0], scale.mV[1]), scale.mV[2]);
+            }
+            LLViewerObject::const_child_list_t children = volume->getChildren();
+            for (LLViewerObject::const_child_list_t::const_iterator child_iter = children.begin();
+                 child_iter != children.end();
+                 ++child_iter)
+            {
+                LLViewerObject* child_obj = *child_iter;
+                LLVOVolume *child = dynamic_cast<LLVOVolume*>( child_obj );
+                if (child && child->getVolume())
+                {
+                    const LLVector3& scale = child->getScale();
+                    area += child->getVolume()->getSurfaceArea() * llmax(llmax(scale.mV[0], scale.mV[1]), scale.mV[2]);
+                }
+            }
+        }
+    }
+    return area;
+}
+
 void LLViewerObject::updateSpatialExtents(LLVector4a& newMin, LLVector4a &newMax)
 {
 	LLVector4a center;
@@ -3652,7 +3934,6 @@ void LLViewerObject::boostTexturePriority(BOOL boost_children /* = TRUE */)
 	}
 }
 
-
 void LLViewerObject::setLineWidthForWindowSize(S32 window_width)
 {
 	if (window_width < 700)
@@ -3879,8 +4160,20 @@ const LLVector3 LLViewerObject::getRenderPosition() const
 {
 	if (mDrawable.notNull() && mDrawable->isState(LLDrawable::RIGGED))
 	{
+        LLControlAvatar *cav = getControlAvatar();
+        if (isRoot() && cav)
+        {
+            F32 fixup;
+            if ( cav->hasPelvisFixup( fixup) )
+            {
+                //Apply a pelvis fixup (as defined by the avs skin)
+                LLVector3 pos = mDrawable->getPositionAgent();
+                pos[VZ] += fixup;
+                return pos;
+            }
+        }
 		LLVOAvatar* avatar = getAvatar();
-		if (avatar)
+		if ((avatar) && !getControlAvatar())
 		{
 			return avatar->getPositionAgent();
 		}
@@ -3904,7 +4197,7 @@ const LLVector3 LLViewerObject::getPivotPositionAgent() const
 const LLQuaternion LLViewerObject::getRenderRotation() const
 {
 	LLQuaternion ret;
-	if (mDrawable.notNull() && mDrawable->isState(LLDrawable::RIGGED))
+	if (mDrawable.notNull() && mDrawable->isState(LLDrawable::RIGGED) && !isAnimatedObject())
 	{
 		return ret;
 	}
@@ -5166,7 +5459,13 @@ LLVOAvatar* LLViewerObject::asAvatar()
 	return NULL;
 }
 
-// If this object is directly or indirectly parented by an avatar, return it.
+// If this object is directly or indirectly parented by an avatar,
+// return it.  Normally getAvatar() is the correct function to call;
+// it will give the avatar used for skinning.  The exception is with
+// animated objects that are also attachments; in that case,
+// getAvatar() will return the control avatar, used for skinning, and
+// getAvatarAncestor will return the avatar to which the object is
+// attached.
 LLVOAvatar* LLViewerObject::getAvatarAncestor()
 {
 	LLViewerObject *pobj = (LLViewerObject*) getParent();
@@ -5505,6 +5804,11 @@ LLViewerObject::ExtraParameter* LLViewerObject::createNewParameterEntry(U16 para
 		  new_block = new LLLightImageParams();
 		  break;
 	  }
+      case LLNetworkData::PARAMS_EXTENDED_MESH:
+      {
+		  new_block = new LLExtendedMeshParams();
+		  break;
+      }
 	  default:
 	  {
 		  LL_INFOS() << "Unknown param type." << LL_ENDL;
@@ -5904,6 +6208,17 @@ void LLViewerObject::updateVolume(const LLVolumeParams& volume_params)
 	}
 }
 
+void LLViewerObject::recursiveMarkForUpdate(BOOL priority)
+{
+    for (LLViewerObject::child_list_t::iterator iter = mChildList.begin();
+         iter != mChildList.end(); iter++)
+    {
+        LLViewerObject* child = *iter;
+        child->markForUpdate(priority);
+    }
+    markForUpdate(priority);
+}
+
 void LLViewerObject::markForUpdate(BOOL priority)
 {
 	if (mDrawable.notNull())
@@ -5963,6 +6278,11 @@ void LLViewerObject::setRegion(LLViewerRegion *regionp)
 		child->setRegion(regionp);
 	}
 
+    if (mControlAvatar)
+    {
+        mControlAvatar->setRegion(regionp);
+    }
+
 	setChanged(MOVED | SILHOUETTE);
 	updateDrawable(FALSE);
 }
@@ -6411,6 +6731,10 @@ const std::string& LLViewerObject::getAttachmentItemName() const
 //virtual
 LLVOAvatar* LLViewerObject::getAvatar() const
 {
+    if (getControlAvatar())
+    {
+        return getControlAvatar();
+    }
 	if (isAttachment())
 	{
 		LLViewerObject* vobj = (LLViewerObject*) getParent();
diff --git a/indra/newview/llviewerobject.h b/indra/newview/llviewerobject.h
index d61832c2ad..d6c8b76147 100644
--- a/indra/newview/llviewerobject.h
+++ b/indra/newview/llviewerobject.h
@@ -42,11 +42,13 @@
 #include "v3math.h"
 #include "llvertexbuffer.h"
 #include "llbbox.h"
+#include "llrigginginfo.h"
 
 class LLAgent;			// TODO: Get rid of this.
 class LLAudioSource;
 class LLAudioSourceVO;
 class LLColor4;
+class LLControlAvatar;
 class LLDataPacker;
 class LLDataPackerBinaryBuffer;
 class LLDrawable;
@@ -67,6 +69,8 @@ class LLViewerRegion;
 class LLViewerTexture;
 class LLWorld;
 
+class LLMeshCostData;
+
 typedef enum e_object_update_type
 {
 	OUT_FULL,
@@ -220,6 +224,8 @@ public:
 	LLViewerRegion* getRegion() const				{ return mRegionp; }
 
 	BOOL isSelected() const							{ return mUserSelected; }
+    // Check whole linkset
+    BOOL isAnySelected() const;
 	virtual void setSelected(BOOL sel);
 
 	const LLUUID &getID() const						{ return mID; }
@@ -231,6 +237,7 @@ public:
 	virtual BOOL isFlexible() const					{ return FALSE; }
 	virtual BOOL isSculpted() const 				{ return FALSE; }
 	virtual BOOL isMesh() const						{ return FALSE; }
+	virtual BOOL isRiggedMesh() const				{ return FALSE; }
 	virtual BOOL hasLightTexture() const			{ return FALSE; }
 
 	// This method returns true if the object is over land owned by
@@ -255,6 +262,8 @@ public:
 	*/
 
 	virtual BOOL setParent(LLViewerObject* parent);
+    virtual void onReparent(LLViewerObject *old_parent, LLViewerObject *new_parent);
+    virtual void afterReparent();
 	virtual void addChild(LLViewerObject *childp);
 	virtual void removeChild(LLViewerObject *childp);
 	const_child_list_t& getChildren() const { 	return mChildList; }
@@ -356,9 +365,17 @@ public:
 	
 	virtual void setScale(const LLVector3 &scale, BOOL damped = FALSE);
 
-	virtual F32 getStreamingCost(S32* bytes = NULL, S32* visible_bytes = NULL, F32* unscaled_value = NULL) const;
+    S32 getAnimatedObjectMaxTris() const;
+    F32 recursiveGetEstTrianglesMax() const;
+    virtual F32 getEstTrianglesMax() const;
+    virtual F32 getEstTrianglesStreamingCost() const;
+	virtual F32 getStreamingCost() const;
+    virtual bool getCostData(LLMeshCostData& costs) const;
 	virtual U32 getTriangleCount(S32* vcount = NULL) const;
 	virtual U32 getHighLODTriangleCount();
+    F32 recursiveGetScaledSurfaceArea() const;
+
+    U32 recursiveGetTriangleCount(S32* vcount = NULL) const;
 
 	void setObjectCost(F32 cost);
 	F32 getObjectCost();
@@ -374,7 +391,7 @@ public:
 
 	void sendShapeUpdate();
 
-	U8 getState()							{ return mState; }
+	U8 getAttachmentState()							{ return mAttachmentState; }
 
 	F32 getAppAngle() const					{ return mAppAngle; }
 	F32 getPixelArea() const				{ return mPixelArea; }
@@ -411,7 +428,8 @@ public:
 	void setIcon(LLViewerTexture* icon_image);
 	void clearIcon();
 
-	void markForUpdate(BOOL priority);
+    void recursiveMarkForUpdate(BOOL priority);
+	virtual void markForUpdate(BOOL priority);
 	void markForUnload(BOOL priority);
 	void updateVolume(const LLVolumeParams& volume_params);
 	virtual	void updateSpatialExtents(LLVector4a& min, LLVector4a& max);
@@ -686,6 +704,27 @@ public:
 
 	static			BOOL		sUseSharedDrawables;
 
+public:
+    // Returns mControlAvatar for the edit root prim of this linkset
+    LLControlAvatar *getControlAvatar();
+    LLControlAvatar *getControlAvatar() const;
+
+    // Create or connect to an existing control av as applicable
+    void linkControlAvatar();
+    // Remove any reference to control av for this prim
+    void unlinkControlAvatar();
+    // Link or unlink as needed
+    void updateControlAvatar();
+
+    virtual bool isAnimatedObject() const;
+
+    // Flags for createObject
+    static const S32 CO_FLAG_CONTROL_AVATAR = 1 << 0;
+    static const S32 CO_FLAG_UI_AVATAR = 1 << 1;
+
+protected:
+    LLPointer<LLControlAvatar> mControlAvatar;
+
 protected:
 	// delete an item in the inventory, but don't tell the
 	// server. This is used internally by remove, update, and
@@ -696,8 +735,7 @@ protected:
 	// updateInventory.
 	void doUpdateInventory(LLPointer<LLViewerInventoryItem>& item, U8 key, bool is_new);
 
-
-	static LLViewerObject *createObject(const LLUUID &id, LLPCode pcode, LLViewerRegion *regionp);
+	static LLViewerObject *createObject(const LLUUID &id, LLPCode pcode, LLViewerRegion *regionp, S32 flags = 0);
 
 	BOOL setData(const U8 *datap, const U32 data_size);
 
@@ -785,7 +823,7 @@ protected:
 	LLQuaternion	mAngularVelocityRot;		// accumulated rotation from the angular velocity computations
 	LLQuaternion	mPreviousRotation;
 
-	U8				mState;	// legacy
+	U8				mAttachmentState;	// this encodes the attachment id in a somewhat complex way. 0 if not an attachment.
 	LLViewerObjectMedia* mMedia;	// NULL if no media associated
 	U8 mClickAction;
 	F32 mObjectCost; //resource cost of this object or -1 if unknown
@@ -841,6 +879,10 @@ public:
 	BOOL getLastUpdateCached() const;
 	void setLastUpdateCached(BOOL last_update_cached);
 
+    virtual void updateRiggingInfo() {}
+
+    LLJointRiggingInfoTab mJointRiggingInfoTab;
+
 private:
 	LLUUID mAttachmentItemID; // ItemID of the associated object is in user inventory.
 	EObjectUpdateType	mLastUpdateType;
diff --git a/indra/newview/llviewerobjectlist.cpp b/indra/newview/llviewerobjectlist.cpp
index f97021aedf..2aff71367e 100644
--- a/indra/newview/llviewerobjectlist.cpp
+++ b/indra/newview/llviewerobjectlist.cpp
@@ -68,6 +68,7 @@
 #include "u64.h"
 #include "llviewertexturelist.h"
 #include "lldatapacker.h"
+#include "llcallstack.h"
 #ifdef LL_USESYSTEMLIBS
 #include <zlib.h>
 #else
@@ -241,6 +242,10 @@ void LLViewerObjectList::processUpdateCore(LLViewerObject* objectp,
 	}
 
 	// ignore returned flags
+    LL_DEBUGS("ObjectUpdate") << "uuid " << objectp->mID << " calling processUpdateMessage " 
+                              << objectp << " just_created " << just_created << " from_cache " << from_cache << " msg " << msg << LL_ENDL;
+    dumpStack("ObjectUpdateStack");
+	 	
 	objectp->processUpdateMessage(msg, user_data, i, update_type, dpp);
 		
 	if (objectp->isDead())
@@ -352,7 +357,10 @@ LLViewerObject* LLViewerObjectList::processObjectUpdateFromCache(LLVOCacheEntry*
 	if (!objectp)
 	{
 		objectp = createObjectFromCache(pcode, regionp, fullid, entry->getLocalID());
-		
+
+        LL_DEBUGS("ObjectUpdate") << "uuid " << fullid << " created objectp " << objectp << LL_ENDL;
+        dumpStack("ObjectUpdateStack");
+	 	
 		if (!objectp)
 		{
 			LL_INFOS() << "createObject failure for object: " << fullid << LL_ENDL;
@@ -471,6 +479,7 @@ void LLViewerObjectList::processObjectUpdate(LLMessageSystem *mesgsys,
 			compressed_dp.reset();
 
 			uncompressed_length = mesgsys->getSizeFast(_PREHASH_ObjectData, i, _PREHASH_Data);
+			LL_DEBUGS("ObjectUpdate") << "got binary data from message to compressed_dpbuffer" << LL_ENDL;
 			mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_Data, compressed_dpbuffer, 0, i, 2048);
 			compressed_dp.assignBuffer(compressed_dpbuffer, uncompressed_length);
 
@@ -530,6 +539,10 @@ void LLViewerObjectList::processObjectUpdate(LLMessageSystem *mesgsys,
 				// LL_WARNS() << "update for unknown localid " << local_id << " host " << gMessageSystem->getSender() << LL_ENDL;
 				mNumUnknownUpdates++;
 			}
+            else
+            {
+                LL_DEBUGS("ObjectUpdate") << "Non-full, non-compressed update, obj " << local_id << ", global ID " << fullid << " from " << mesgsys->getSender() << LL_ENDL;
+            }
 		}
 		else // OUT_FULL only?
 		{
@@ -538,10 +551,19 @@ void LLViewerObjectList::processObjectUpdate(LLMessageSystem *mesgsys,
 			mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_ID, local_id, i);
 			msg_size += sizeof(LLUUID);
 			msg_size += sizeof(U32);
-			// LL_INFOS() << "Full Update, obj " << local_id << ", global ID" << fullid << "from " << mesgsys->getSender() << LL_ENDL;
+			LL_DEBUGS("ObjectUpdate") << "Full Update, obj " << local_id << ", global ID " << fullid << " from " << mesgsys->getSender() << LL_ENDL;
 		}
 		objectp = findObject(fullid);
 
+        if (compressed)
+        {
+            LL_DEBUGS("ObjectUpdate") << "uuid " << fullid << " received compressed data from message (earlier in function)" << LL_ENDL;
+        }
+        LL_DEBUGS("ObjectUpdate") << "uuid " << fullid << " objectp " << objectp 
+                                     << " update_cache " << (S32) update_cache << " compressed " << compressed
+                                     << " update_type "  << update_type << LL_ENDL;
+        dumpStack("ObjectUpdateStack");
+        
 		if(update_cache)
 		{
 			objectp = regionp->updateCacheEntry(local_id, objectp, update_type);
@@ -616,6 +638,10 @@ void LLViewerObjectList::processObjectUpdate(LLMessageSystem *mesgsys,
 #endif
 
 			objectp = createObject(pcode, regionp, fullid, local_id, gMessageSystem->getSender());
+
+            LL_DEBUGS("ObjectUpdate") << "creating object " << fullid << " result " << objectp << LL_ENDL;
+            dumpStack("ObjectUpdateStack");
+
 			if (!objectp)
 			{
 				LL_INFOS() << "createObject failure for object: " << fullid << LL_ENDL;
@@ -710,12 +736,17 @@ void LLViewerObjectList::processCachedObjectUpdate(LLMessageSystem *mesgsys,
 		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_CRC, crc, i);
 		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, i);
 		msg_size += sizeof(U32) * 2;
-		
+
+        LL_DEBUGS("ObjectUpdate") << "got probe for id " << id << " crc " << crc << LL_ENDL;
+        dumpStack("ObjectUpdateStack");
+
 		// Lookup data packer and add this id to cache miss lists if necessary.
 		U8 cache_miss_type = LLViewerRegion::CACHE_MISS_TYPE_NONE;
 		if(!regionp->probeCache(id, crc, flags, cache_miss_type))
 		{
 			// Cache Miss.
+            LL_DEBUGS("ObjectUpdate") << "cache miss for id " << id << " crc " << crc << " miss type " << (S32) cache_miss_type << LL_ENDL;
+
 			recorder.cacheMissEvent(id, update_type, cache_miss_type, msg_size);
 
 			continue; // no data packer, skip this object
@@ -876,8 +907,8 @@ void LLViewerObjectList::update(LLAgent &agent)
 			{
 				if (idle_count >= idle_list.size())
 				{
-				idle_list.push_back( objectp );
-			}
+                    idle_list.push_back( objectp );
+                }
 			else
 				{
 					idle_list[idle_count] = objectp;
@@ -914,7 +945,7 @@ void LLViewerObjectList::update(LLAgent &agent)
 		{
 			objectp = *idle_iter;
 			llassert(objectp->isActive());
-			objectp->idleUpdate(agent, frame_time);
+                objectp->idleUpdate(agent, frame_time);
 		}
 
 		//update flexible objects
@@ -1274,6 +1305,9 @@ void LLViewerObjectList::cleanupReferences(LLViewerObject *objectp)
 	// Cleanup any references we have to this object
 	// Remove from object map so noone can look it up.
 
+    LL_DEBUGS("ObjectUpdate") << " dereferencing id " << objectp->mID << LL_ENDL;
+    dumpStack("ObjectUpdateStack");
+    
 	mUUIDObjectMap.erase(objectp->mID);
 	
 	//if (objectp->getRegion())
@@ -1960,12 +1994,12 @@ void LLViewerObjectList::resetObjectBeacons()
 	mDebugBeacons.clear();
 }
 
-LLViewerObject *LLViewerObjectList::createObjectViewer(const LLPCode pcode, LLViewerRegion *regionp)
+LLViewerObject *LLViewerObjectList::createObjectViewer(const LLPCode pcode, LLViewerRegion *regionp, S32 flags)
 {
 	LLUUID fullid;
 	fullid.generate();
 
-	LLViewerObject *objectp = LLViewerObject::createObject(fullid, pcode, regionp);
+	LLViewerObject *objectp = LLViewerObject::createObject(fullid, pcode, regionp, flags);
 	if (!objectp)
 	{
 // 		LL_WARNS() << "Couldn't create object of type " << LLPrimitive::pCodeToString(pcode) << LL_ENDL;
@@ -1985,6 +2019,9 @@ LLViewerObject *LLViewerObjectList::createObjectFromCache(const LLPCode pcode, L
 {
 	llassert_always(uuid.notNull());
 
+    LL_DEBUGS("ObjectUpdate") << "creating " << uuid << " local_id " << local_id << LL_ENDL;
+    dumpStack("ObjectUpdateStack");
+    
 	LLViewerObject *objectp = LLViewerObject::createObject(uuid, pcode, regionp);
 	if (!objectp)
 	{
@@ -2019,6 +2056,9 @@ LLViewerObject *LLViewerObjectList::createObject(const LLPCode pcode, LLViewerRe
 		fullid = uuid;
 	}
 
+    LL_DEBUGS("ObjectUpdate") << "createObject creating " << fullid << LL_ENDL;
+    dumpStack("ObjectUpdateStack");
+
 	LLViewerObject *objectp = LLViewerObject::createObject(fullid, pcode, regionp);
 	if (!objectp)
 	{
diff --git a/indra/newview/llviewerobjectlist.h b/indra/newview/llviewerobjectlist.h
index 94c751acc6..72b2b99004 100644
--- a/indra/newview/llviewerobjectlist.h
+++ b/indra/newview/llviewerobjectlist.h
@@ -67,7 +67,7 @@ public:
 	inline LLViewerObject *getObject(const S32 index);
 	
 	inline LLViewerObject *findObject(const LLUUID &id);
-	LLViewerObject *createObjectViewer(const LLPCode pcode, LLViewerRegion *regionp); // Create a viewer-side object
+	LLViewerObject *createObjectViewer(const LLPCode pcode, LLViewerRegion *regionp, S32 flags = 0); // Create a viewer-side object
 	LLViewerObject *createObjectFromCache(const LLPCode pcode, LLViewerRegion *regionp, const LLUUID &uuid, const U32 local_id);
 	LLViewerObject *createObject(const LLPCode pcode, LLViewerRegion *regionp,
 								 const LLUUID &uuid, const U32 local_id, const LLHost &sender);
diff --git a/indra/newview/llvieweroctree.cpp b/indra/newview/llvieweroctree.cpp
index 5f0e21db71..00a652384c 100644
--- a/indra/newview/llvieweroctree.cpp
+++ b/indra/newview/llvieweroctree.cpp
@@ -731,7 +731,7 @@ bool LLViewerOctreeGroup::boundObjects(BOOL empty, LLVector4a& minOut, LLVector4
 			update_min_max(newMin, newMax, minMax[0]);
 			update_min_max(newMin, newMax, minMax[1]);
 		}
-		
+
 		mObjectBounds[0].setAdd(newMin, newMax);
 		mObjectBounds[0].mul(0.5f);
 		mObjectBounds[1].setSub(newMax, newMin);
diff --git a/indra/newview/llviewerregion.cpp b/indra/newview/llviewerregion.cpp
index 4f0460da29..ba733bb068 100644
--- a/indra/newview/llviewerregion.cpp
+++ b/indra/newview/llviewerregion.cpp
@@ -78,6 +78,7 @@
 #include "llcoros.h"
 #include "lleventcoro.h"
 #include "llcorehttputil.h"
+#include "llcallstack.h"
 
 #ifdef LL_WINDOWS
 	#pragma warning(disable:4355)
@@ -241,6 +242,8 @@ void LLViewerRegionImpl::requestBaseCapabilitiesCoro(U64 regionHandle)
             LL_WARNS("AppInit", "Capabilities") << "Attempting to get capabilities for region that no longer exists!" << LL_ENDL;
             return; // this error condition is not recoverable.
         }
+        LL_DEBUGS("AppInit", "Capabilities") << "requesting seed caps for handle " << regionHandle 
+                                             << " name " << regionp->getName() << LL_ENDL;
 
         std::string url = regionp->getCapability("Seed");
         if (url.empty())
@@ -269,7 +272,8 @@ void LLViewerRegionImpl::requestBaseCapabilitiesCoro(U64 regionHandle)
         buildCapabilityNames(capabilityNames);
 
         LL_INFOS("AppInit", "Capabilities") << "Requesting seed from " << url 
-            << " (attempt #" << mSeedCapAttempts + 1 << ")" << LL_ENDL;
+                                            << " region name " << regionp->getName()
+                                            << " (attempt #" << mSeedCapAttempts + 1 << ")" << LL_ENDL;
 
         regionp = NULL;
         result = httpAdapter->postAndSuspend(httpRequest, url, capabilityNames);
@@ -323,6 +327,8 @@ void LLViewerRegionImpl::requestBaseCapabilitiesCoro(U64 regionHandle)
 #endif
 
         regionp->setCapabilitiesReceived(true);
+        LL_DEBUGS("AppInit", "Capabilities") << "received caps for handle " << regionHandle 
+                                             << " region name " << regionp->getName() << LL_ENDL;
 
         if (STATE_SEED_GRANTED_WAIT == LLStartUp::getStartupState())
         {
@@ -1259,7 +1265,7 @@ void LLViewerRegion::updateVisibleEntries(F32 max_time)
 		LLPointer<LLViewerOctreeGroup> group = *group_iter;
 		if(group->getNumRefs() < 3 || //group to be deleted
 			!group->getOctreeNode() || group->isEmpty()) //group empty
-{
+        {
 			continue;
 		}
 
@@ -2143,6 +2149,26 @@ void LLViewerRegion::getInfo(LLSD& info)
 	info["Region"]["Handle"]["y"] = (LLSD::Integer)y;
 }
 
+void LLViewerRegion::requestSimulatorFeatures()
+{
+    LL_DEBUGS("SimulatorFeatures") << "region " << getName() << " ptr " << this
+                                   << " trying to request SimulatorFeatures" << LL_ENDL;
+    // kick off a request for simulator features
+    std::string url = getCapability("SimulatorFeatures");
+    if (!url.empty())
+    {
+        std::string coroname =
+            LLCoros::instance().launch("LLViewerRegionImpl::requestSimulatorFeatureCoro",
+                                       boost::bind(&LLViewerRegionImpl::requestSimulatorFeatureCoro, mImpl, url, getHandle()));
+        
+        LL_INFOS("AppInit", "SimulatorFeatures") << "Launching " << coroname << " requesting simulator features from " << url << LL_ENDL;
+    }
+    else
+    {
+        LL_WARNS("AppInit", "SimulatorFeatures") << "SimulatorFeatures cap not set" << LL_ENDL;
+    }
+}
+
 boost::signals2::connection LLViewerRegion::setSimulatorFeaturesReceivedCallback(const caps_received_signal_t::slot_type& cb)
 {
 	return mSimulatorFeaturesReceivedSignal.connect(cb);
@@ -2174,7 +2200,7 @@ void LLViewerRegion::setSimulatorFeatures(const LLSD& sim_features)
 	std::stringstream str;
 	
 	LLSDSerialize::toPrettyXML(sim_features, str);
-	LL_INFOS() << str.str() << LL_ENDL;
+	LL_INFOS() << "region " << getName() << " "  << str.str() << LL_ENDL;
 	mSimulatorFeatures = sim_features;
 
 	setSimulatorFeaturesReceived(true);
@@ -2220,7 +2246,7 @@ void LLViewerRegion::decodeBoundingInfo(LLVOCacheEntry* entry)
 	{
 		LLViewerRegion* old_regionp = ((LLDrawable*)entry->getEntry()->getDrawable())->getRegion();
 		if(old_regionp != this && old_regionp)
-{
+        {
 			LLViewerObject* obj = ((LLDrawable*)entry->getEntry()->getDrawable())->getVObj();
 			if(obj)
 			{
@@ -2383,12 +2409,18 @@ LLViewerRegion::eCacheUpdateResult LLViewerRegion::cacheFullUpdate(LLDataPackerB
 		// we've seen this object before
 		if (entry->getCRC() == crc)
 		{
+            LL_DEBUGS("AnimatedObjects") << " got dupe for local_id " << local_id << LL_ENDL;
+            dumpStack("AnimatedObjectsStack");
+
 			// Record a hit
 			entry->recordDupe();
 			result = CACHE_UPDATE_DUPE;
 		}
 		else //CRC changed
 		{
+            LL_DEBUGS("AnimatedObjects") << " got update for local_id " << local_id << LL_ENDL;
+            dumpStack("AnimatedObjectsStack");
+
 			// Update the cache entry
 			entry->updateEntry(crc, dp);
 
@@ -2399,6 +2431,9 @@ LLViewerRegion::eCacheUpdateResult LLViewerRegion::cacheFullUpdate(LLDataPackerB
 	}
 	else
 	{
+        LL_DEBUGS("AnimatedObjects") << " got first notification for local_id " << local_id << LL_ENDL;
+        dumpStack("AnimatedObjectsStack");
+
 		// we haven't seen this object before
 		// Create new entry and add to map
 		result = CACHE_UPDATE_ADDED;
@@ -2503,7 +2538,7 @@ bool LLViewerRegion::probeCache(U32 local_id, U32 crc, U32 flags, U8 &cache_miss
 			// Record a hit
 			mRegionCacheHitCount++;
 			entry->recordHit();
-		cache_miss_type = CACHE_MISS_TYPE_NONE;
+            cache_miss_type = CACHE_MISS_TYPE_NONE;
 			entry->setUpdateFlags(flags);
 			
 			if(entry->isState(LLVOCacheEntry::ACTIVE))
@@ -2526,12 +2561,14 @@ bool LLViewerRegion::probeCache(U32 local_id, U32 crc, U32 flags, U8 &cache_miss
 			// LL_INFOS() << "CRC miss for " << local_id << LL_ENDL;
 
 			addCacheMiss(local_id, CACHE_MISS_TYPE_CRC);
+            cache_miss_type = CACHE_MISS_TYPE_CRC;
 		}
 	}
 	else
 	{
 		// LL_INFOS() << "Cache miss for " << local_id << LL_ENDL;
 		addCacheMiss(local_id, CACHE_MISS_TYPE_FULL);
+        cache_miss_type = CACHE_MISS_TYPE_FULL;
 	}
 
 	return false;
@@ -2568,6 +2605,9 @@ void LLViewerRegion::requestCacheMisses()
 		msg->nextBlockFast(_PREHASH_ObjectData);
 		msg->addU8Fast(_PREHASH_CacheMissType, (*iter).mType);
 		msg->addU32Fast(_PREHASH_ID, (*iter).mID);
+
+        LL_DEBUGS("AnimatedObjects") << "Requesting cache missed object " << (*iter).mID << LL_ENDL;
+        
 		blocks++;
 
 		if (blocks >= 255)
@@ -2873,6 +2913,7 @@ void LLViewerRegionImpl::buildCapabilityNames(LLSD& capabilityNames)
 	capabilityNames.append("MeshUploadFlag");	
 	capabilityNames.append("NavMeshGenerationStatus");
 	capabilityNames.append("NewFileAgentInventory");
+	capabilityNames.append("ObjectAnimation");
 	capabilityNames.append("ObjectMedia");
 	capabilityNames.append("ObjectMediaNavigate");
 	capabilityNames.append("ObjectNavMeshProperties");
@@ -2967,12 +3008,8 @@ void LLViewerRegion::setCapability(const std::string& name, const std::string& u
 	}
 	else if (name == "SimulatorFeatures")
 	{
-		// kick off a request for simulator features
-        std::string coroname =
-            LLCoros::instance().launch("LLViewerRegionImpl::requestSimulatorFeatureCoro",
-            boost::bind(&LLViewerRegionImpl::requestSimulatorFeatureCoro, mImpl, url, getHandle()));
-
-        LL_INFOS("AppInit", "SimulatorFeatures") << "Launching " << coroname << " requesting simulator features from " << url << LL_ENDL;
+        mImpl->mCapabilities["SimulatorFeatures"] = url;
+        requestSimulatorFeatures();
 	}
 	else
 	{
diff --git a/indra/newview/llviewerregion.h b/indra/newview/llviewerregion.h
index 302647215f..d5266ec873 100644
--- a/indra/newview/llviewerregion.h
+++ b/indra/newview/llviewerregion.h
@@ -305,6 +305,7 @@ public:
 	bool meshUploadEnabled() const;
 
 	// has region received its simulator features list? Requires an additional query after caps received.
+    void requestSimulatorFeatures();
 	void setSimulatorFeaturesReceived(bool);
 	bool simulatorFeaturesReceived() const;
 	boost::signals2::connection setSimulatorFeaturesReceivedCallback(const caps_received_signal_t::slot_type& cb);
diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index 01ec703fe6..e53ccd7b8d 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -543,7 +543,14 @@ public:
 								object_count++;
 								S32 bytes = 0;	
 								S32 visible = 0;
-								cost += object->getStreamingCost(&bytes, &visible);
+								cost += object->getStreamingCost();
+                                LLMeshCostData costs;
+                                if (object->getCostData(costs))
+                                {
+                                    bytes = costs.getSizeTotal();
+                                    visible = costs.getSizeByLOD(object->getLOD());
+                                }
+
 								S32 vt = 0;
 								count += object->getTriangleCount(&vt);
 								vcount += vt;
@@ -1146,7 +1153,9 @@ LLWindowCallbacks::DragNDropResult LLViewerWindow::handleDragNDrop( LLWindow *wi
 
 				if (prim_media_dnd_enabled)
 				{
-					LLPickInfo pick_info = pickImmediate( pos.mX, pos.mY,  TRUE /*BOOL pick_transparent*/, FALSE );
+					LLPickInfo pick_info = pickImmediate( pos.mX, pos.mY,
+                                                          TRUE /* pick_transparent */, 
+                                                          FALSE /* pick_rigged */);
 
 					LLUUID object_id = pick_info.getObjectID();
 					S32 object_face = pick_info.mObjectFace;
diff --git a/indra/newview/llvoavatar.cpp b/indra/newview/llvoavatar.cpp
index b221dc7c35..321f774210 100644
--- a/indra/newview/llvoavatar.cpp
+++ b/indra/newview/llvoavatar.cpp
@@ -44,6 +44,7 @@
 #include "llavatarnamecache.h"
 #include "llavatarpropertiesprocessor.h"
 #include "llavatarrendernotifier.h"
+#include "llcontrolavatar.h"
 #include "llexperiencecache.h"
 #include "llphysicsmotion.h"
 #include "llviewercontrol.h"
@@ -109,6 +110,8 @@
 #include "llcallstack.h"
 #include "llrendersphere.h"
 
+#include <boost/lexical_cast.hpp>
+
 extern F32 SPEED_ADJUST_MAX;
 extern F32 SPEED_ADJUST_MAX_SEC;
 extern F32 ANIM_SPEED_MAX;
@@ -142,7 +145,7 @@ const LLUUID ANIM_AGENT_PHYSICS_MOTION = LLUUID("7360e029-3cb8-ebc4-863e-212df44
 //-----------------------------------------------------------------------------
 // Constants
 //-----------------------------------------------------------------------------
-const F32 DELTA_TIME_MIN = 0.01f;	// we clamp measured deltaTime to this
+const F32 DELTA_TIME_MIN = 0.01f;	// we clamp measured delta_time to this
 const F32 DELTA_TIME_MAX = 0.2f;	// range to insure stability of computations.
 
 const F32 PELVIS_LAG_FLYING		= 0.22f;// pelvis follow half life while flying
@@ -617,6 +620,8 @@ LLVOAvatar::LLVOAvatar(const LLUUID& id,
 	LLViewerObject(id, pcode, regionp),
 	mSpecialRenderMode(0),
 	mAttachmentSurfaceArea(0.f),
+	mAttachmentVisibleTriangleCount(0),
+	mAttachmentEstTriangleCount(0.f),
 	mReportedVisualComplexity(VISUAL_COMPLEXITY_UNKNOWN),
 	mTurning(FALSE),
 	mLastSkeletonSerialNum( 0 ),
@@ -625,6 +630,7 @@ LLVOAvatar::LLVOAvatar(const LLUUID& id,
 	mTyping(FALSE),
 	mMeshValid(FALSE),
 	mVisible(FALSE),
+	mLastImpostorUpdateFrameTime(0.f),
 	mWindFreq(0.f),
 	mRipplePhase( 0.f ),
 	mBelowWater(FALSE),
@@ -663,7 +669,10 @@ LLVOAvatar::LLVOAvatar(const LLUUID& id,
 	mLastUpdateRequestCOFVersion(-1),
 	mLastUpdateReceivedCOFVersion(-1),
 	mCachedMuteListUpdateTime(0),
-	mCachedInMuteList(false)
+	mCachedInMuteList(false),
+    mIsControlAvatar(false),
+    mIsUIAvatar(false),
+    mEnableDefaultMotions(true)
 {
 	LL_DEBUGS("AvatarRender") << "LLVOAvatar Constructor (0x" << this << ") id:" << mID << LL_ENDL;
 
@@ -689,6 +698,8 @@ LLVOAvatar::LLVOAvatar(const LLUUID& id,
 	mNeedsImpostorUpdate = TRUE;
 	mNeedsAnimUpdate = TRUE;
 
+	mNeedsExtentUpdate = true;
+
 	mImpostorDistance = 0;
 	mImpostorPixelArea = 0;
 
@@ -718,6 +729,7 @@ LLVOAvatar::LLVOAvatar(const LLUUID& id,
 
 	mCurrentGesticulationLevel = 0;
 
+    
 	mRuthTimer.reset();
 	mRuthDebugTimer.reset();
 	mDebugExistenceTimer.reset();
@@ -733,8 +745,15 @@ LLVOAvatar::LLVOAvatar(const LLUUID& id,
 
 std::string LLVOAvatar::avString() const
 {
-	std::string viz_string = LLVOAvatar::rezStatusToString(getRezzedStatus());
-	return " Avatar '" + getFullname() + "' " + viz_string + " ";
+    if (isControlAvatar())
+    {
+        return getFullname();
+    }
+    else
+    {
+        std::string viz_string = LLVOAvatar::rezStatusToString(getRezzedStatus());
+        return " Avatar '" + getFullname() + "' " + viz_string + " ";
+    }
 }
 
 void LLVOAvatar::debugAvatarRezTime(std::string notification_name, std::string comment)
@@ -1091,6 +1110,8 @@ void LLVOAvatar::initClass()
 
     // Where should this be set initially?
     LLJoint::setDebugJointNames(gSavedSettings.getString("DebugAvatarJoints"));
+
+	LLControlAvatar::sRegionChangedSlot = gAgent.addRegionChangedCallback(&LLControlAvatar::onRegionChanged);
 }
 
 
@@ -1099,7 +1120,7 @@ void LLVOAvatar::cleanupClass()
 }
 
 // virtual
-void LLVOAvatar::initInstance(void)
+void LLVOAvatar::initInstance()
 {
 	//-------------------------------------------------------------------------
 	// register motions
@@ -1170,6 +1191,8 @@ void LLVOAvatar::initInstance(void)
 	//VTPause();  // VTune
 	
 	mVoiceVisualizer->setVoiceEnabled( LLVoiceClient::getInstance()->getVoiceEnabled( mID ) );
+
+    mInitFlags |= 1<<1;
 }
 
 // virtual
@@ -1222,8 +1245,6 @@ const LLVector3 LLVOAvatar::getRenderPosition() const
 	{
 		return getPosition() * mDrawable->getParent()->getRenderMatrix();
 	}
-	
-	
 }
 
 void LLVOAvatar::updateDrawable(BOOL force_damped)
@@ -1240,6 +1261,29 @@ void LLVOAvatar::onShift(const LLVector4a& shift_vector)
 
 void LLVOAvatar::updateSpatialExtents(LLVector4a& newMin, LLVector4a &newMax)
 {
+    if (mDrawable.isNull())
+    {
+        return;
+    }
+
+    if (mNeedsExtentUpdate)
+    {
+        calculateSpatialExtents(newMin,newMax);
+        mLastAnimExtents[0].set(newMin.getF32ptr());
+        mLastAnimExtents[1].set(newMax.getF32ptr());
+		mLastAnimBasePos = mPelvisp->getWorldPosition();
+        mNeedsExtentUpdate = false;
+    }
+	else
+	{
+		LLVector3 new_base_pos = mPelvisp->getWorldPosition();
+		LLVector3 shift = new_base_pos-mLastAnimBasePos;
+		mLastAnimExtents[0] += shift;
+		mLastAnimExtents[1] += shift;
+		mLastAnimBasePos = new_base_pos;
+
+	}
+          
 	if (isImpostor() && !needsImpostorUpdate())
 	{
 		LLVector3 delta = getRenderPosition() -
@@ -1250,98 +1294,185 @@ void LLVOAvatar::updateSpatialExtents(LLVector4a& newMin, LLVector4a &newMax)
 	}
 	else
 	{
-		getSpatialExtents(newMin,newMax);
-		mLastAnimExtents[0].set(newMin.getF32ptr());
-		mLastAnimExtents[1].set(newMax.getF32ptr());
+        newMin.load3(mLastAnimExtents[0].mV);
+        newMax.load3(mLastAnimExtents[1].mV);
 		LLVector4a pos_group;
 		pos_group.setAdd(newMin,newMax);
 		pos_group.mul(0.5f);
 		mImpostorOffset = LLVector3(pos_group.getF32ptr())-getRenderPosition();
 		mDrawable->setPositionGroup(pos_group);
 	}
-	
-	
 }
 
-void LLVOAvatar::getSpatialExtents(LLVector4a& newMin, LLVector4a& newMax)
+
+static LLTrace::BlockTimerStatHandle FTM_AVATAR_EXTENT_UPDATE("Av Upd Extent");
+
+void LLVOAvatar::calculateSpatialExtents(LLVector4a& newMin, LLVector4a& newMax)
 {
-	LLVector4a buffer(0.25f);
+    LL_RECORD_BLOCK_TIME(FTM_AVATAR_EXTENT_UPDATE);
+
+    S32 box_detail = gSavedSettings.getS32("AvatarBoundingBoxComplexity");
+
+    // FIXME the update_min_max function used below assumes there is a
+    // known starting point, but in general there isn't. Ideally the
+    // box update logic should be modified to handle the no-point-yet
+    // case. For most models, starting with the pelvis is safe though.
+    LLVector3 zero_pos;
 	LLVector4a pos;
-	pos.load3(getRenderPosition().mV);
-	newMin.setSub(pos, buffer);
-	newMax.setAdd(pos, buffer);
+    if (dist_vec(zero_pos, mPelvisp->getWorldPosition())<0.001)
+    {
+        // Don't use pelvis until av initialized
+        pos.load3(getRenderPosition().mV);
+    }
+    else
+    {
+        pos.load3(mPelvisp->getWorldPosition().mV);
+    }
+	newMin = pos;
+	newMax = pos;
 
-	float max_attachment_span = get_default_max_prim_scale() * 5.0f;
-	
-	//stretch bounding box by joint positions
-	for (polymesh_map_t::iterator i = mPolyMeshes.begin(); i != mPolyMeshes.end(); ++i)
-	{
-		LLPolyMesh* mesh = i->second;
-		for (S32 joint_num = 0; joint_num < mesh->mJointRenderData.size(); joint_num++)
-		{
-			LLVector4a trans;
-			trans.load3( mesh->mJointRenderData[joint_num]->mWorldMatrix->getTranslation().mV);
-			update_min_max(newMin, newMax, trans);
-		}
-	}
+	//stretch bounding box by joint positions. Doing this for
+	//control avs, where the polymeshes aren't maintained or
+	//displayed, can give inaccurate boxes due to joints stuck at (0,0,0).
+    if ((box_detail>=1) && !isControlAvatar())
+    {
+        for (polymesh_map_t::iterator i = mPolyMeshes.begin(); i != mPolyMeshes.end(); ++i)
+        {
+            LLPolyMesh* mesh = i->second;
+            for (S32 joint_num = 0; joint_num < mesh->mJointRenderData.size(); joint_num++)
+            {
+                LLVector4a trans;
+                trans.load3( mesh->mJointRenderData[joint_num]->mWorldMatrix->getTranslation().mV);
+                update_min_max(newMin, newMax, trans);
+            }
+        }
 
-	LLVector4a center, size;
-	center.setAdd(newMin, newMax);
-	center.mul(0.5f);
+    }
 
-	size.setSub(newMax,newMin);
-	size.mul(0.5f);
+	// Pad bounding box for starting joint, plus polymesh if
+	// applicable. Subsequent calcs should be accurate enough to not
+	// need padding.
+	LLVector4a padding(0.25);
+	newMin.sub(padding);
+	newMax.add(padding);
 
-	mPixelArea = LLPipeline::calcPixelArea(center, size, *LLViewerCamera::getInstance());
 
-	//stretch bounding box by attachments
-	for (attachment_map_t::iterator iter = mAttachmentPoints.begin(); 
-		 iter != mAttachmentPoints.end();
-		 ++iter)
-	{
-		LLViewerJointAttachment* attachment = iter->second;
+	//stretch bounding box by static attachments
+    if (box_detail >= 2)
+    {
+        float max_attachment_span = get_default_max_prim_scale() * 5.0f;
+	
+        for (attachment_map_t::iterator iter = mAttachmentPoints.begin(); 
+             iter != mAttachmentPoints.end();
+             ++iter)
+        {
+            LLViewerJointAttachment* attachment = iter->second;
 
-		if (attachment->getValid())
-		{
-			for (LLViewerJointAttachment::attachedobjs_vec_t::iterator attachment_iter = attachment->mAttachedObjects.begin();
-				 attachment_iter != attachment->mAttachedObjects.end();
-				 ++attachment_iter)
-			{
-				const LLViewerObject* attached_object = (*attachment_iter);
-				if (attached_object && !attached_object->isHUDAttachment())
-				{
-					LLDrawable* drawable = attached_object->mDrawable;
-					if (drawable && !drawable->isState(LLDrawable::RIGGED))
-					{
-						LLSpatialBridge* bridge = drawable->getSpatialBridge();
-						if (bridge)
-						{
-							const LLVector4a* ext = bridge->getSpatialExtents();
-							LLVector4a distance;
-							distance.setSub(ext[1], ext[0]);
-							LLVector4a max_span(max_attachment_span);
+            if (attachment->getValid())
+            {
+                for (LLViewerJointAttachment::attachedobjs_vec_t::iterator attachment_iter = attachment->mAttachedObjects.begin();
+                     attachment_iter != attachment->mAttachedObjects.end();
+                     ++attachment_iter)
+                {
+                    // Don't we need to look at children of attached_object as well?
+                    const LLViewerObject* attached_object = (*attachment_iter);
+                    if (attached_object && !attached_object->isHUDAttachment())
+                    {
+                        const LLVOVolume *vol = dynamic_cast<const LLVOVolume*>(attached_object);
+                        if (vol && vol->isAnimatedObject())
+                        {
+                            // Animated objects already have a bounding box in their control av, use that. 
+                            // Could lag by a frame if there's no guarantee on order of processing for avatars.
+                            LLControlAvatar *cav = vol->getControlAvatar();
+                            if (cav)
+                            {
+                                LLVector4a cav_min;
+                                cav_min.load3(cav->mLastAnimExtents[0].mV);
+                                LLVector4a cav_max;
+                                cav_max.load3(cav->mLastAnimExtents[1].mV);
+                                update_min_max(newMin,newMax,cav_min);
+                                update_min_max(newMin,newMax,cav_max);
+                                continue;
+                            }
+                        }
+                        if (vol && vol->isRiggedMesh())
+                        {
+                            continue;
+                        }
+                        LLDrawable* drawable = attached_object->mDrawable;
+                        if (drawable && !drawable->isState(LLDrawable::RIGGED))
+                        {
+                            LLSpatialBridge* bridge = drawable->getSpatialBridge();
+                            if (bridge)
+                            {
+                                const LLVector4a* ext = bridge->getSpatialExtents();
+                                LLVector4a distance;
+                                distance.setSub(ext[1], ext[0]);
+                                LLVector4a max_span(max_attachment_span);
 
-							S32 lt = distance.lessThan(max_span).getGatheredBits() & 0x7;
+                                S32 lt = distance.lessThan(max_span).getGatheredBits() & 0x7;
 						
-							// Only add the prim to spatial extents calculations if it isn't a megaprim.
-							// max_attachment_span calculated at the start of the function 
-							// (currently 5 times our max prim size) 
-							if (lt == 0x7)
-							{
-								update_min_max(newMin,newMax,ext[0]);
-								update_min_max(newMin,newMax,ext[1]);
-							}
-						}
-					}
-				}
-			}
-		}
-	}
+                                // Only add the prim to spatial extents calculations if it isn't a megaprim.
+                                // max_attachment_span calculated at the start of the function 
+                                // (currently 5 times our max prim size) 
+                                if (lt == 0x7)
+                                {
+                                    update_min_max(newMin,newMax,ext[0]);
+                                    update_min_max(newMin,newMax,ext[1]);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
 
-	//pad bounding box	
+    // Stretch bounding box by rigged mesh joint boxes
+    if (box_detail>=3)
+    {
+		updateRiggingInfo();
+        for (S32 joint_num = 0; joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS; joint_num++)
+        {
+            LLJoint *joint = getJoint(joint_num);
+            LLJointRiggingInfo *rig_info = NULL;
+            if (joint_num < mJointRiggingInfoTab.size())
+            {
+                rig_info = &mJointRiggingInfoTab[joint_num];
+            }
+
+            if (joint && rig_info && rig_info->isRiggedTo())
+            {
+                LLViewerJointAttachment *as_joint_attach = dynamic_cast<LLViewerJointAttachment*>(joint);
+                if (as_joint_attach && as_joint_attach->getIsHUDAttachment())
+                {
+                    // Ignore bounding box of HUD joints
+                    continue;
+                }
+                LLMatrix4a mat;
+                LLVector4a new_extents[2];
+                mat.loadu(joint->getWorldMatrix());
+                matMulBoundBox(mat, rig_info->getRiggedExtents(), new_extents);
+                update_min_max(newMin, newMax, new_extents[0]);
+                update_min_max(newMin, newMax, new_extents[1]);
+                //if (isSelf())
+                //{
+                //    LL_INFOS() << joint->getName() << " extents " << new_extents[0] << "," << new_extents[1] << LL_ENDL;
+                //    LL_INFOS() << joint->getName() << " av box is " << newMin << "," << newMax << LL_ENDL;
+                //}
+            }
+        }
+    }
 
-	newMin.sub(buffer);
-	newMax.add(buffer);
+    // Update pixel area
+    LLVector4a center, size;
+    center.setAdd(newMin, newMax);
+    center.mul(0.5f);
+    
+    size.setSub(newMax,newMin);
+    size.mul(0.5f);
+    
+    mPixelArea = LLPipeline::calcPixelArea(center, size, *LLViewerCamera::getInstance());
 }
 
 void render_sphere_and_line(const LLVector3& begin_pos, const LLVector3& end_pos, F32 sphere_scale, const LLVector3& occ_color, const LLVector3& visible_color)
@@ -1404,13 +1535,29 @@ void LLVOAvatar::renderCollisionVolumes()
         static F32 sphere_scale = 1.0f;
         static F32 center_dot_scale = 0.05f;
 
-        static LLVector3 CV_COLOR_OCCLUDED(0.0f, 0.0f, 1.0f);
-        static LLVector3 CV_COLOR_VISIBLE(0.5f, 0.5f, 1.0f);
-        static LLVector3 DOT_COLOR_OCCLUDED(1.0f, 1.0f, 1.0f);
-        static LLVector3 DOT_COLOR_VISIBLE(1.0f, 1.0f, 1.0f);
+        static LLVector3 BLUE(0.0f, 0.0f, 1.0f);
+        static LLVector3 PASTEL_BLUE(0.5f, 0.5f, 1.0f);
+        static LLVector3 RED(1.0f, 0.0f, 0.0f);
+        static LLVector3 PASTEL_RED(1.0f, 0.5f, 0.5f);
+        static LLVector3 WHITE(1.0f, 1.0f, 1.0f);
+        
 
-        render_sphere_and_line(begin_pos, end_pos, sphere_scale, CV_COLOR_OCCLUDED, CV_COLOR_VISIBLE);
-        render_sphere_and_line(begin_pos, end_pos, center_dot_scale, DOT_COLOR_OCCLUDED, DOT_COLOR_VISIBLE);
+        LLVector3 cv_color_occluded;
+        LLVector3 cv_color_visible;
+        LLVector3 dot_color_occluded(WHITE);
+        LLVector3 dot_color_visible(WHITE);
+        if (isControlAvatar())
+        {
+            cv_color_occluded = RED;
+            cv_color_visible = PASTEL_RED;
+        }
+        else
+        {
+            cv_color_occluded = BLUE;
+            cv_color_visible = PASTEL_BLUE;
+        }
+        render_sphere_and_line(begin_pos, end_pos, sphere_scale, cv_color_occluded, cv_color_visible);
+        render_sphere_and_line(begin_pos, end_pos, center_dot_scale, dot_color_occluded, dot_color_visible);
 
         gGL.popMatrix();
     }
@@ -1422,9 +1569,6 @@ void LLVOAvatar::renderCollisionVolumes()
 	
 		mNameText->lineSegmentIntersect(unused, unused, unused, TRUE);
 	}
-
-	mDebugText.clear();
-	addDebugText(ostr.str());
 }
 
 void LLVOAvatar::renderBones()
@@ -1467,7 +1611,7 @@ void LLVOAvatar::renderBones()
         }
         else
         {
-            if (jointIsRiggedTo(jointp->getName()))
+            if (jointIsRiggedTo(jointp))
             {
                 occ_color = RIGGED_COLOR_OCCLUDED;
                 visible_color = RIGGED_COLOR_VISIBLE;
@@ -1595,6 +1739,11 @@ BOOL LLVOAvatar::lineSegmentIntersect(const LLVector4a& start, const LLVector4a&
 		return FALSE;
 	}
 
+    if (isControlAvatar())
+    {
+        return FALSE;
+    }
+    
 	if (lineSegmentBoundingBox(start, end))
 	{
 		for (S32 i = 0; i < mNumCollisionVolumes; ++i)
@@ -1680,6 +1829,7 @@ BOOL LLVOAvatar::lineSegmentIntersect(const LLVector4a& start, const LLVector4a&
 	return FALSE;
 }
 
+// virtual
 LLViewerObject* LLVOAvatar::lineSegmentIntersectRiggedAttachments(const LLVector4a& start, const LLVector4a& end,
 									  S32 face,
 									  BOOL pick_transparent,
@@ -1796,7 +1946,11 @@ void LLVOAvatar::buildCharacter()
 		mAahMorph = getVisualParam( "Express_Open_Mouth" );
 	}
 
-	startDefaultMotions();
+    // Currently disabled for control avatars (animated objects), enabled for all others.
+    if (mEnableDefaultMotions)
+    {
+        startDefaultMotions();
+    }
 
 	//-------------------------------------------------------------------------
 	// restart any currently active motions
@@ -1856,7 +2010,7 @@ void LLVOAvatar::resetVisualParams()
 void LLVOAvatar::resetSkeleton(bool reset_animations)
 {
     LL_DEBUGS("Avatar") << avString() << " reset starts" << LL_ENDL;
-    if (!mLastProcessedAppearance)
+    if (!isControlAvatar() && !mLastProcessedAppearance)
     {
         LL_WARNS() << "Can't reset avatar; no appearance message has been received yet." << LL_ENDL;
         return;
@@ -1910,12 +2064,15 @@ void LLVOAvatar::resetSkeleton(bool reset_animations)
     }
 
     // Reset tweakable params to preserved state
-    bool slam_params = true;
-    applyParsedAppearanceMessage(*mLastProcessedAppearance, slam_params);
+    if (mLastProcessedAppearance)
+    {
+        bool slam_params = true;
+        applyParsedAppearanceMessage(*mLastProcessedAppearance, slam_params);
+    }
     updateVisualParams();
 
     // Restore attachment pos overrides
-    rebuildAttachmentOverrides();
+    updateAttachmentOverrides();
 
     // Animations
     if (reset_animations)
@@ -1942,7 +2099,7 @@ void LLVOAvatar::resetSkeleton(bool reset_animations)
 //-----------------------------------------------------------------------------
 void LLVOAvatar::releaseMeshData()
 {
-	if (sInstances.size() < AVATAR_RELEASE_THRESHOLD || mIsDummy)
+	if (sInstances.size() < AVATAR_RELEASE_THRESHOLD || isUIAvatar())
 	{
 		return;
 	}
@@ -1962,15 +2119,15 @@ void LLVOAvatar::releaseMeshData()
 		LLFace* facep = mDrawable->getFace(0);
 		if (facep)
 		{
-		facep->setSize(0, 0);
-		for(S32 i = mNumInitFaces ; i < mDrawable->getNumFaces(); i++)
-		{
-			facep = mDrawable->getFace(i);
+            facep->setSize(0, 0);
+            for(S32 i = mNumInitFaces ; i < mDrawable->getNumFaces(); i++)
+            {
+                facep = mDrawable->getFace(i);
 				if (facep)
 				{
-			facep->setSize(0, 0);
-		}
-	}
+                    facep->setSize(0, 0);
+                }
+            }
 		}
 	}
 	
@@ -1994,6 +2151,10 @@ void LLVOAvatar::releaseMeshData()
 void LLVOAvatar::restoreMeshData()
 {
 	llassert(!isSelf());
+    if (mDrawable.isNull())
+    {
+        return;
+    }
 	
 	//LL_INFOS() << "Restoring" << LL_ENDL;
 	mMeshValid = TRUE;
@@ -2291,6 +2452,18 @@ void LLVOAvatar::idleUpdate(LLAgent &agent, const F64 &time)
 		return;
 	}
 
+    // Update should be happening max once per frame.
+	const S32 upd_freq = 4; // force update every upd_freq frames.
+	if ((mLastAnimExtents[0]==LLVector3())||
+		(mLastAnimExtents[1])==LLVector3())
+	{
+		mNeedsExtentUpdate = true;
+	}
+	else
+	{
+		mNeedsExtentUpdate = ((LLDrawable::getCurrentFrame()+mID.mData[0])%upd_freq==0);
+	}
+    
     LLScopedContextString str("avatar_idle_update " + getFullname());
     
 	checkTextureLoading() ;
@@ -2303,7 +2476,7 @@ void LLVOAvatar::idleUpdate(LLAgent &agent, const F64 &time)
 	{	
 		LL_RECORD_BLOCK_TIME(FTM_JOINT_UPDATE);
 	
-		if (mIsSitting && getParent())
+		if (isSitting() && getParent())
 		{
 			LLViewerObject *root_object = (LLViewerObject*)getRoot();
 			LLDrawable* drawablep = root_object->mDrawable;
@@ -2469,7 +2642,7 @@ void LLVOAvatar::idleUpdateVoiceVisualizer(bool voice_enabled)
 		// (the following version uses a tweak of "mHeadOffset" which handle sitting vs. standing)
 		//--------------------------------------------------------------------------------------------
 		
-		if ( mIsSitting )
+		if ( isSitting() )
 		{
 			LLVector3 headOffset = LLVector3( 0.0f, 0.0f, mHeadOffset.mV[2] );
 			mVoiceVisualizer->setVoiceSourceWorldPosition( mRoot->getWorldPosition() + headOffset );
@@ -2573,8 +2746,10 @@ void LLVOAvatar::idleUpdateMisc(bool detailed_update)
 			}
 			else
 			{
-				//VECTORIZE THIS
-				getSpatialExtents(ext[0], ext[1]);
+				ext[0].load3(mLastAnimExtents[0].mV);
+                ext[1].load3(mLastAnimExtents[1].mV);
+                // Expensive. Just call this once per frame, in updateSpatialExtents();
+                //calculateSpatialExtents(ext[0], ext[1]);
 				LLVector4a diff;
 				diff.setSub(ext[1], mImpostorExtents[1]);
 				if (diff.getLength3().getF32() > 0.05f)
@@ -2593,13 +2768,16 @@ void LLVOAvatar::idleUpdateMisc(bool detailed_update)
 		}
 	}
 
-	mDrawable->movePartition();
-	
-	//force a move if sitting on an active object
-	if (getParent() && ((LLViewerObject*) getParent())->mDrawable->isActive())
-	{
-		gPipeline.markMoved(mDrawable, TRUE);
-	}
+    if (mDrawable.notNull())
+    {
+        mDrawable->movePartition();
+        
+        //force a move if sitting on an active object
+        if (getParent() && ((LLViewerObject*) getParent())->mDrawable->isActive())
+        {
+            gPipeline.markMoved(mDrawable, TRUE);
+        }
+    }
 }
 
 void LLVOAvatar::idleUpdateAppearanceAnimation()
@@ -2760,7 +2938,8 @@ void LLVOAvatar::idleUpdateLoadingEffect()
 																 LLPartData::LL_PART_EMISSIVE_MASK | // LLPartData::LL_PART_FOLLOW_SRC_MASK |
 																 LLPartData::LL_PART_TARGET_POS_MASK );
 			
-			if (!isTooComplex()) // do not generate particles for overly-complex avatars
+			// do not generate particles for dummy or overly-complex avatars
+			if (!mIsDummy && !isTooComplex())
 			{
 				setParticleSource(particle_parameters, getID());
 			}
@@ -3358,154 +3537,218 @@ bool LLVOAvatar::isInMuteList()
 	return muted;
 }
 
-void LLVOAvatar::updateDebugText()
+void LLVOAvatar::updateAppearanceMessageDebugText()
 {
-	// clear debug text
-	mDebugText.clear();
+    S32 central_bake_version = -1;
+    if (getRegion())
+    {
+        central_bake_version = getRegion()->getCentralBakeVersion();
+    }
+    bool all_baked_downloaded = allBakedTexturesCompletelyDownloaded();
+    bool all_local_downloaded = allLocalTexturesCompletelyDownloaded();
+    std::string debug_line = llformat("%s%s - mLocal: %d, mEdit: %d, mUSB: %d, CBV: %d",
+                                      isSelf() ? (all_local_downloaded ? "L" : "l") : "-",
+                                      all_baked_downloaded ? "B" : "b",
+                                      mUseLocalAppearance, mIsEditingAppearance,
+                                      1, central_bake_version);
+    std::string origin_string = bakedTextureOriginInfo();
+    debug_line += " [" + origin_string + "]";
+    S32 curr_cof_version = LLAppearanceMgr::instance().getCOFVersion();
+    S32 last_request_cof_version = mLastUpdateRequestCOFVersion;
+    S32 last_received_cof_version = mLastUpdateReceivedCOFVersion;
+    if (isSelf())
+    {
+        debug_line += llformat(" - cof: %d req: %d rcv:%d",
+                               curr_cof_version, last_request_cof_version, last_received_cof_version);
+        if (gSavedSettings.getBOOL("DebugForceAppearanceRequestFailure"))
+        {
+            debug_line += " FORCING ERRS";
+        }
+    }
+    else
+    {
+        debug_line += llformat(" - cof rcv:%d", last_received_cof_version);
+    }
+    debug_line += llformat(" bsz-z: %.3f", mBodySize[2]);
+    if (mAvatarOffset[2] != 0.0f)
+    {
+        debug_line += llformat("avofs-z: %.3f", mAvatarOffset[2]);
+    }
+    bool hover_enabled = getRegion() && getRegion()->avatarHoverHeightEnabled();
+    debug_line += hover_enabled ? " H" : " h";
+    const LLVector3& hover_offset = getHoverOffset();
+    if (hover_offset[2] != 0.0)
+    {
+        debug_line += llformat(" hov_z: %.3f", hover_offset[2]);
+        debug_line += llformat(" %s", (isSitting() ? "S" : "T"));
+        debug_line += llformat("%s", (isMotionActive(ANIM_AGENT_SIT_GROUND_CONSTRAINED) ? "G" : "-"));
+    }
+    LLVector3 ankle_right_pos_agent = mFootRightp->getWorldPosition();
+    LLVector3 normal;
+    LLVector3 ankle_right_ground_agent = ankle_right_pos_agent;
+    resolveHeightAgent(ankle_right_pos_agent, ankle_right_ground_agent, normal);
+    F32 rightElev = llmax(-0.2f, ankle_right_pos_agent.mV[VZ] - ankle_right_ground_agent.mV[VZ]);
+    debug_line += llformat(" relev %.3f", rightElev);
 
-	if (gSavedSettings.getBOOL("DebugAvatarAppearanceMessage"))
-	{
-		S32 central_bake_version = -1;
-		if (getRegion())
-		{
-			central_bake_version = getRegion()->getCentralBakeVersion();
-		}
-		bool all_baked_downloaded = allBakedTexturesCompletelyDownloaded();
-		bool all_local_downloaded = allLocalTexturesCompletelyDownloaded();
-		std::string debug_line = llformat("%s%s - mLocal: %d, mEdit: %d, mUSB: %d, CBV: %d",
-										  isSelf() ? (all_local_downloaded ? "L" : "l") : "-",
-										  all_baked_downloaded ? "B" : "b",
-										  mUseLocalAppearance, mIsEditingAppearance,
-										  1, central_bake_version);
-		std::string origin_string = bakedTextureOriginInfo();
-		debug_line += " [" + origin_string + "]";
-		S32 curr_cof_version = LLAppearanceMgr::instance().getCOFVersion();
-		S32 last_request_cof_version = mLastUpdateRequestCOFVersion;
-		S32 last_received_cof_version = mLastUpdateReceivedCOFVersion;
-		if (isSelf())
-		{
-			debug_line += llformat(" - cof: %d req: %d rcv:%d",
-								   curr_cof_version, last_request_cof_version, last_received_cof_version);
-			if (gSavedSettings.getBOOL("DebugForceAppearanceRequestFailure"))
-			{
-				debug_line += " FORCING ERRS";
-			}
-		}
-		else
-		{
-			debug_line += llformat(" - cof rcv:%d", last_received_cof_version);
-		}
-		debug_line += llformat(" bsz-z: %.3f", mBodySize[2]);
-        if (mAvatarOffset[2] != 0.0f)
+    LLVector3 root_pos = mRoot->getPosition();
+    LLVector3 pelvis_pos = mPelvisp->getPosition();
+    debug_line += llformat(" rp %.3f pp %.3f", root_pos[2], pelvis_pos[2]);
+
+    S32 is_visible = (S32) isVisible();
+    S32 is_m_visible = (S32) mVisible;
+    debug_line += llformat(" v %d/%d", is_visible, is_m_visible);
+
+    addDebugText(debug_line);
+}
+
+LLViewerInventoryItem* getObjectInventoryItem(LLViewerObject *vobj, LLUUID asset_id)
+{
+    LLViewerInventoryItem *item = NULL;
+
+    if (vobj)
+    {
+        if (vobj->getInventorySerial()<=0)
         {
-            debug_line += llformat("avofs-z: %.3f", mAvatarOffset[2]);
+            vobj->requestInventory(); 
         }
-		bool hover_enabled = getRegion() && getRegion()->avatarHoverHeightEnabled();
-		debug_line += hover_enabled ? " H" : " h";
-		const LLVector3& hover_offset = getHoverOffset();
-		if (hover_offset[2] != 0.0)
-		{
-			debug_line += llformat(" hov_z: %.3f", hover_offset[2]);
-			debug_line += llformat(" %s", (mIsSitting ? "S" : "T"));
-			debug_line += llformat("%s", (isMotionActive(ANIM_AGENT_SIT_GROUND_CONSTRAINED) ? "G" : "-"));
-		}
-        LLVector3 ankle_right_pos_agent = mFootRightp->getWorldPosition();
-		LLVector3 normal;
-        LLVector3 ankle_right_ground_agent = ankle_right_pos_agent;
-        resolveHeightAgent(ankle_right_pos_agent, ankle_right_ground_agent, normal);
-        F32 rightElev = llmax(-0.2f, ankle_right_pos_agent.mV[VZ] - ankle_right_ground_agent.mV[VZ]);
-        debug_line += llformat(" relev %.3f", rightElev);
+        item = vobj->getInventoryItemByAsset(asset_id);
+    }
+    return item;
+}
 
-        LLVector3 root_pos = mRoot->getPosition();
-        LLVector3 pelvis_pos = mPelvisp->getPosition();
-        debug_line += llformat(" rp %.3f pp %.3f", root_pos[2], pelvis_pos[2]);
+LLViewerInventoryItem* recursiveGetObjectInventoryItem(LLViewerObject *vobj, LLUUID asset_id)
+{
+    LLViewerInventoryItem *item = getObjectInventoryItem(vobj, asset_id);
+    if (!item)
+    {
+        LLViewerObject::const_child_list_t& children = vobj->getChildren();
+        for (LLViewerObject::const_child_list_t::const_iterator it = children.begin();
+             it != children.end(); ++it)
+        {
+            LLViewerObject *childp = *it;
+            item = getObjectInventoryItem(childp, asset_id);
+            if (item)
+            {
+                break;
+            }
+        }
+    }
+    return item;
+}
 
-		addDebugText(debug_line);
+void LLVOAvatar::updateAnimationDebugText()
+{
+    for (LLMotionController::motion_list_t::iterator iter = mMotionController.getActiveMotions().begin();
+         iter != mMotionController.getActiveMotions().end(); ++iter)
+    {
+        LLMotion* motionp = *iter;
+        if (motionp->getMinPixelArea() < getPixelArea())
+        {
+            std::string output;
+            std::string motion_name = motionp->getName();
+            if (motion_name.empty())
+            {
+                if (isControlAvatar())
+                {
+                    LLControlAvatar *control_av = dynamic_cast<LLControlAvatar*>(this);
+                    // Try to get name from inventory of associated object
+                    LLVOVolume *volp = control_av->mRootVolp;
+                    LLViewerInventoryItem *item = recursiveGetObjectInventoryItem(volp,motionp->getID());
+                    if (item)
+                    {
+                        motion_name = item->getName();
+                    }
+                }
+            }
+            if (motion_name.empty())
+            {
+                std::string name;
+                if (gAgent.isGodlikeWithoutAdminMenuFakery() || isSelf())
+                {
+                    name = motionp->getID().asString();
+                    LLVOAvatar::AnimSourceIterator anim_it = mAnimationSources.begin();
+                    for (; anim_it != mAnimationSources.end(); ++anim_it)
+                    {
+                        if (anim_it->second == motionp->getID())
+                        {
+                            LLViewerObject* object = gObjectList.findObject(anim_it->first);
+                            if (!object)
+                            {
+                                break;
+                            }
+                            if (object->isAvatar())
+                            {
+                                if (mMotionController.mIsSelf)
+                                {
+                                    // Searching inventory by asset id is really long
+                                    // so just mark as inventory
+                                    // Also item is likely to be named by LLPreviewAnim
+                                    name += "(inventory)";
+                                }
+                            }
+                            else
+                            {
+                                LLViewerInventoryItem* item = NULL;
+                                if (!object->isInventoryDirty())
+                                {
+                                    item = object->getInventoryItemByAsset(motionp->getID());
+                                }
+                                if (item)
+                                {
+                                    name = item->getName();
+                                }
+                                else if (object->isAttachment())
+                                {
+                                    name += "(" + getAttachmentItemName() + ")";
+                                }
+                                else
+                                {
+                                    // in-world object, name or content unknown
+                                    name += "(in-world)";
+                                }
+                            }
+                            break;
+                        }
+                    }
+                }
+                else
+                {
+                    name = LLUUID::null.asString();
+                }
+                output = llformat("%s - %d",
+                                  name.c_str(),
+                                  (U32)motionp->getPriority());
+            }
+            else
+            {
+                output = llformat("%s - %d",
+                                  motion_name.c_str(),
+                                  (U32)motionp->getPriority());
+            }
+            addDebugText(output);
+        }
+    }
+}
+
+void LLVOAvatar::updateDebugText()
+{
+    // Leave mDebugText uncleared here, in case a derived class has added some state first
+
+	if (gSavedSettings.getBOOL("DebugAvatarAppearanceMessage"))
+	{
+        updateAppearanceMessageDebugText();
 	}
+
 	if (gSavedSettings.getBOOL("DebugAvatarCompositeBaked"))
 	{
 		if (!mBakedTextureDebugText.empty())
 			addDebugText(mBakedTextureDebugText);
 	}
 
+    // Develop -> Avatar -> Animation Info
 	if (LLVOAvatar::sShowAnimationDebug)
 	{
-		for (LLMotionController::motion_list_t::iterator iter = mMotionController.getActiveMotions().begin();
-			 iter != mMotionController.getActiveMotions().end(); ++iter)
-		{
-			LLMotion* motionp = *iter;
-			if (motionp->getMinPixelArea() < getPixelArea())
-			{
-				std::string output;
-				if (motionp->getName().empty())
-				{
-					std::string name;
-					if (gAgent.isGodlikeWithoutAdminMenuFakery() || isSelf())
-					{
-						name = motionp->getID().asString();
-						LLVOAvatar::AnimSourceIterator anim_it = mAnimationSources.begin();
-						for (; anim_it != mAnimationSources.end(); ++anim_it)
-						{
-							if (anim_it->second == motionp->getID())
-							{
-								LLViewerObject* object = gObjectList.findObject(anim_it->first);
-								if (!object)
-								{
-									break;
-								}
-								if (object->isAvatar())
-								{
-									if (mMotionController.mIsSelf)
-									{
-										// Searching inventory by asset id is really long
-										// so just mark as inventory
-										// Also item is likely to be named by LLPreviewAnim
-										name += "(inventory)";
-									}
-								}
-								else
-								{
-									LLViewerInventoryItem* item = NULL;
-									if (!object->isInventoryDirty())
-									{
-										item = object->getInventoryItemByAsset(motionp->getID());
-									}
-									if (item)
-									{
-										name = item->getName();
-									}
-									else if (object->isAttachment())
-									{
-										name += "(" + getAttachmentItemName() + ")";
-									}
-									else
-									{
-										// in-world object, name or content unknown
-										name += "(in-world)";
-									}
-								}
-								break;
-							}
-						}
-					}
-					else
-					{
-						name = LLUUID::null.asString();
-					}
-
-					output = llformat("%s - %d",
-							  name.c_str(),
-							  (U32)motionp->getPriority());
-				}
-				else
-				{
-					output = llformat("%s - %d",
-							  motionp->getName().c_str(),
-							  (U32)motionp->getPriority());
-				}
-				addDebugText(output);
-			}
-		}
+        updateAnimationDebugText();
 	}
 
 	if (!mDebugText.size() && mText.notNull())
@@ -3517,51 +3760,125 @@ void LLVOAvatar::updateDebugText()
 	{
 		setDebugText(mDebugText);
 	}
-	mDebugText.clear();
-
+    mDebugText.clear();
 }
 
 //------------------------------------------------------------------------
-// updateCharacter()
-// called on both your avatar and other avatars
+// updateFootstepSounds
+// Factored out from updateCharacter()
+// Generate footstep sounds when feet hit the ground
 //------------------------------------------------------------------------
-BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
-{	
-	updateDebugText();
-	
-	if (!mIsBuilt)
-	{
-		return FALSE;
-	}
+void LLVOAvatar::updateFootstepSounds()
+{
+    if (mIsDummy)
+    {
+        return;
+    }
+    
+	//-------------------------------------------------------------------------
+	// Find the ground under each foot, these are used for a variety
+	// of things that follow
+	//-------------------------------------------------------------------------
+	LLVector3 ankle_left_pos_agent = mFootLeftp->getWorldPosition();
+	LLVector3 ankle_right_pos_agent = mFootRightp->getWorldPosition();
 
-	BOOL visible = isVisible();
+	LLVector3 ankle_left_ground_agent = ankle_left_pos_agent;
+	LLVector3 ankle_right_ground_agent = ankle_right_pos_agent;
+    LLVector3 normal;
+	resolveHeightAgent(ankle_left_pos_agent, ankle_left_ground_agent, normal);
+	resolveHeightAgent(ankle_right_pos_agent, ankle_right_ground_agent, normal);
 
-	// For fading out the names above heads, only let the timer
-	// run if we're visible.
-	if (mDrawable.notNull() && !visible)
+	F32 leftElev = llmax(-0.2f, ankle_left_pos_agent.mV[VZ] - ankle_left_ground_agent.mV[VZ]);
+	F32 rightElev = llmax(-0.2f, ankle_right_pos_agent.mV[VZ] - ankle_right_ground_agent.mV[VZ]);
+
+	if (!isSitting())
 	{
-		mTimeVisible.reset();
+		//-------------------------------------------------------------------------
+		// Figure out which foot is on ground
+		//-------------------------------------------------------------------------
+		if (!mInAir)
+		{
+			if ((leftElev < 0.0f) || (rightElev < 0.0f))
+			{
+				ankle_left_pos_agent = mFootLeftp->getWorldPosition();
+				ankle_right_pos_agent = mFootRightp->getWorldPosition();
+				leftElev = ankle_left_pos_agent.mV[VZ] - ankle_left_ground_agent.mV[VZ];
+				rightElev = ankle_right_pos_agent.mV[VZ] - ankle_right_ground_agent.mV[VZ];
+			}
+		}
 	}
+	
+	const LLUUID AGENT_FOOTSTEP_ANIMS[] = {ANIM_AGENT_WALK, ANIM_AGENT_RUN, ANIM_AGENT_LAND};
+	const S32 NUM_AGENT_FOOTSTEP_ANIMS = LL_ARRAY_SIZE(AGENT_FOOTSTEP_ANIMS);
 
-	//--------------------------------------------------------------------
-	// the rest should only be done occasionally for far away avatars
-	//--------------------------------------------------------------------
+	if ( gAudiop && isAnyAnimationSignaled(AGENT_FOOTSTEP_ANIMS, NUM_AGENT_FOOTSTEP_ANIMS) )
+	{
+		BOOL playSound = FALSE;
+		LLVector3 foot_pos_agent;
+
+		BOOL onGroundLeft = (leftElev <= 0.05f);
+		BOOL onGroundRight = (rightElev <= 0.05f);
+
+		// did left foot hit the ground?
+		if ( onGroundLeft && !mWasOnGroundLeft )
+		{
+			foot_pos_agent = ankle_left_pos_agent;
+			playSound = TRUE;
+		}
+
+		// did right foot hit the ground?
+		if ( onGroundRight && !mWasOnGroundRight )
+		{
+			foot_pos_agent = ankle_right_pos_agent;
+			playSound = TRUE;
+		}
+
+		mWasOnGroundLeft = onGroundLeft;
+		mWasOnGroundRight = onGroundRight;
+
+		if ( playSound )
+		{
+			const F32 STEP_VOLUME = 0.1f;
+			const LLUUID& step_sound_id = getStepSound();
+
+			LLVector3d foot_pos_global = gAgent.getPosGlobalFromAgent(foot_pos_agent);
 
+			if (LLViewerParcelMgr::getInstance()->canHearSound(foot_pos_global)
+				&& !LLMuteList::getInstance()->isMuted(getID(), LLMute::flagObjectSounds))
+			{
+				gAudiop->triggerSound(step_sound_id, getID(), STEP_VOLUME, LLAudioEngine::AUDIO_TYPE_AMBIENT, foot_pos_global);
+			}
+		}
+	}
+}
+
+//------------------------------------------------------------------------
+// computeUpdatePeriod()
+// Factored out from updateCharacter()
+// Set new value for mUpdatePeriod based on distance and various other factors.
+//------------------------------------------------------------------------
+void LLVOAvatar::computeUpdatePeriod()
+{
 	bool visually_muted = isVisuallyMuted();
-	if (visible && (!isSelf() || visually_muted) && !mIsDummy && sUseImpostors && !mNeedsAnimUpdate && !sFreezeCounter)
+	if (mDrawable.notNull()
+        && isVisible() 
+        && (!isSelf() || visually_muted)
+        && !isUIAvatar()
+        && sUseImpostors
+        && !mNeedsAnimUpdate 
+        && !sFreezeCounter)
 	{
 		const LLVector4a* ext = mDrawable->getSpatialExtents();
 		LLVector4a size;
 		size.setSub(ext[1],ext[0]);
 		F32 mag = size.getLength3().getF32()*0.5f;
-
 		
 		F32 impostor_area = 256.f*512.f*(8.125f - LLVOAvatar::sLODFactor*8.f);
 		if (visually_muted)
 		{ // visually muted avatars update at 16 hz
 			mUpdatePeriod = 16;
 		}
-		else if (   ! shouldImpostor()
+		else if (! shouldImpostor()
 				 || mDrawable->mDistanceWRTCamera < 1.f + mag)
 		{   // first 25% of max visible avatars are not impostored
 			// also, don't impostor avatars whose bounding box may be penetrating the 
@@ -3585,63 +3902,214 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 			//nearby avatars, update the impostors more frequently.
 			mUpdatePeriod = 4;
 		}
-
-		visible = (LLDrawable::getCurrentFrame()+mID.mData[0])%mUpdatePeriod == 0 ? TRUE : FALSE;
 	}
 	else
 	{
 		mUpdatePeriod = 1;
 	}
 
+}
 
-	// don't early out for your own avatar, as we rely on your animations playing reliably
-	// for example, the "turn around" animation when entering customize avatar needs to trigger
-	// even when your avatar is offscreen
-	if (!visible && !isSelf())
-	{
-		updateMotions(LLCharacter::HIDDEN_UPDATE);
-		return FALSE;
-	}
+//------------------------------------------------------------------------
+// updateOrientation()
+// Factored out from updateCharacter()
+// This is used by updateCharacter() to update the avatar's orientation:
+// - updates mTurning state
+// - updates rotation of the mRoot joint in the skeleton
+// - for self, calls setControlFlags() to notify the simulator about any turns
+//------------------------------------------------------------------------
+void LLVOAvatar::updateOrientation(LLAgent& agent, F32 speed, F32 delta_time)
+{
+    LLQuaternion iQ;
+    LLVector3 upDir( 0.0f, 0.0f, 1.0f );
+			
+    // Compute a forward direction vector derived from the primitive rotation
+    // and the velocity vector.  When walking or jumping, don't let body deviate
+    // more than 90 from the view, if necessary, flip the velocity vector.
 
-	// change animation time quanta based on avatar render load
-	if (!isSelf() && !mIsDummy)
+    LLVector3 primDir;
+    if (isSelf())
+    {
+        primDir = agent.getAtAxis() - projected_vec(agent.getAtAxis(), agent.getReferenceUpVector());
+        primDir.normalize();
+    }
+    else
+    {
+        primDir = getRotation().getMatrix3().getFwdRow();
+    }
+    LLVector3 velDir = getVelocity();
+    velDir.normalize();
+    if ( mSignaledAnimations.find(ANIM_AGENT_WALK) != mSignaledAnimations.end())
+    {
+        F32 vpD = velDir * primDir;
+        if (vpD < -0.5f)
+        {
+            velDir *= -1.0f;
+        }
+    }
+    LLVector3 fwdDir = lerp(primDir, velDir, clamp_rescale(speed, 0.5f, 2.0f, 0.0f, 1.0f));
+    if (isSelf() && gAgentCamera.cameraMouselook())
+    {
+        // make sure fwdDir stays in same general direction as primdir
+        if (gAgent.getFlying())
+        {
+            fwdDir = LLViewerCamera::getInstance()->getAtAxis();
+        }
+        else
+        {
+            LLVector3 at_axis = LLViewerCamera::getInstance()->getAtAxis();
+            LLVector3 up_vector = gAgent.getReferenceUpVector();
+            at_axis -= up_vector * (at_axis * up_vector);
+            at_axis.normalize();
+					
+            F32 dot = fwdDir * at_axis;
+            if (dot < 0.f)
+            {
+                fwdDir -= 2.f * at_axis * dot;
+                fwdDir.normalize();
+            }
+        }
+    }
+
+    LLQuaternion root_rotation = mRoot->getWorldMatrix().quaternion();
+    F32 root_roll, root_pitch, root_yaw;
+    root_rotation.getEulerAngles(&root_roll, &root_pitch, &root_yaw);
+
+    // When moving very slow, the pelvis is allowed to deviate from the
+    // forward direction to allow it to hold its position while the torso
+    // and head turn.  Once in motion, it must conform however.
+    BOOL self_in_mouselook = isSelf() && gAgentCamera.cameraMouselook();
+
+    LLVector3 pelvisDir( mRoot->getWorldMatrix().getFwdRow4().mV );
+
+    static LLCachedControl<F32> s_pelvis_rot_threshold_slow(gSavedSettings, "AvatarRotateThresholdSlow", 60.0);
+    static LLCachedControl<F32> s_pelvis_rot_threshold_fast(gSavedSettings, "AvatarRotateThresholdFast", 2.0);
+
+    F32 pelvis_rot_threshold = clamp_rescale(speed, 0.1f, 1.0f, s_pelvis_rot_threshold_slow, s_pelvis_rot_threshold_fast);
+						
+    if (self_in_mouselook)
+    {
+        pelvis_rot_threshold *= MOUSELOOK_PELVIS_FOLLOW_FACTOR;
+    }
+    pelvis_rot_threshold *= DEG_TO_RAD;
+
+    F32 angle = angle_between( pelvisDir, fwdDir );
+
+    // The avatar's root is allowed to have a yaw that deviates widely
+    // from the forward direction, but if roll or pitch are off even
+    // a little bit we need to correct the rotation.
+    if(root_roll < 1.f * DEG_TO_RAD
+       && root_pitch < 5.f * DEG_TO_RAD)
+    {
+        // smaller correction vector means pelvis follows prim direction more closely
+        if (!mTurning && angle > pelvis_rot_threshold*0.75f)
+        {
+            mTurning = TRUE;
+        }
+
+        // use tighter threshold when turning
+        if (mTurning)
+        {
+            pelvis_rot_threshold *= 0.4f;
+        }
+
+        // am I done turning?
+        if (angle < pelvis_rot_threshold)
+        {
+            mTurning = FALSE;
+        }
+
+        LLVector3 correction_vector = (pelvisDir - fwdDir) * clamp_rescale(angle, pelvis_rot_threshold*0.75f, pelvis_rot_threshold, 1.0f, 0.0f);
+        fwdDir += correction_vector;
+    }
+    else
+    {
+        mTurning = FALSE;
+    }
+
+    // Now compute the full world space rotation for the whole body (wQv)
+    LLVector3 leftDir = upDir % fwdDir;
+    leftDir.normalize();
+    fwdDir = leftDir % upDir;
+    LLQuaternion wQv( fwdDir, leftDir, upDir );
+
+    if (isSelf() && mTurning)
+    {
+        if ((fwdDir % pelvisDir) * upDir > 0.f)
+        {
+            gAgent.setControlFlags(AGENT_CONTROL_TURN_RIGHT);
+        }
+        else
+        {
+            gAgent.setControlFlags(AGENT_CONTROL_TURN_LEFT);
+        }
+    }
+
+    // Set the root rotation, but do so incrementally so that it
+    // lags in time by some fixed amount.
+    //F32 u = LLSmoothInterpolation::getInterpolant(PELVIS_LAG);
+    F32 pelvis_lag_time = 0.f;
+    if (self_in_mouselook)
+    {
+        pelvis_lag_time = PELVIS_LAG_MOUSELOOK;
+    }
+    else if (mInAir)
+    {
+        pelvis_lag_time = PELVIS_LAG_FLYING;
+        // increase pelvis lag time when moving slowly
+        pelvis_lag_time *= clamp_rescale(mSpeedAccum, 0.f, 15.f, 3.f, 1.f);
+    }
+    else
+    {
+        pelvis_lag_time = PELVIS_LAG_WALKING;
+    }
+
+    F32 u = llclamp((delta_time / pelvis_lag_time), 0.0f, 1.0f);	
+
+    mRoot->setWorldRotation( slerp(u, mRoot->getWorldRotation(), wQv) );
+}
+
+//------------------------------------------------------------------------
+// updateTimeStep()
+// Factored out from updateCharacter().
+//
+// Updates the time step used by the motion controller, based on area
+// and avatar count criteria.  This will also stop the
+// ANIM_AGENT_WALK_ADJUST animation under some circumstances.
+// ------------------------------------------------------------------------
+void LLVOAvatar::updateTimeStep()
+{
+	if (!isSelf() && !isUIAvatar()) // ie, non-self avatars, and animated objects will be affected.
 	{
+        // Note that sInstances counts animated objects and
+        // standard avatars in the same bucket. Is this desirable?
 		F32 time_quantum = clamp_rescale((F32)sInstances.size(), 10.f, 35.f, 0.f, 0.25f);
 		F32 pixel_area_scale = clamp_rescale(mPixelArea, 100, 5000, 1.f, 0.f);
 		F32 time_step = time_quantum * pixel_area_scale;
+        // Extrema:
+        //   If number of avs is 10 or less, time_step is unmodified (flagged with 0.0).
+        //   If area of av is 5000 or greater, time_step is unmodified (flagged with 0.0).
+        //   If number of avs is 35 or greater, and area of av is 100 or less,
+        //   time_step takes the maximum possible value of 0.25.
+        //   Other situations will give values within the (0, 0.25) range.
 		if (time_step != 0.f)
 		{
 			// disable walk motion servo controller as it doesn't work with motion timesteps
 			stopMotion(ANIM_AGENT_WALK_ADJUST);
 			removeAnimationData("Walk Speed");
 		}
+        // See SL-763 - playback with altered time step does not
+        // appear to work correctly, odd behavior for distant avatars.
+        // As of 11-2017, LLMotionController::updateMotions() will
+        // ignore the value here. Need to re-enable if it's every
+        // fixed.
 		mMotionController.setTimeStep(time_step);
-		//		LL_INFOS() << "Setting timestep to " << time_quantum * pixel_area_scale << LL_ENDL;
-	}
-
-	if (getParent() && !mIsSitting)
-	{
-		sitOnObject((LLViewerObject*)getParent());
-	}
-	else if (!getParent() && mIsSitting && !isMotionActive(ANIM_AGENT_SIT_GROUND_CONSTRAINED))
-	{
-		getOffObject();
 	}
+}
 
-	//--------------------------------------------------------------------
-	// create local variables in world coords for region position values
-	//--------------------------------------------------------------------
-	F32 speed;
-	LLVector3 normal;
-
-	LLVector3 xyVel = getVelocity();
-	xyVel.mV[VZ] = 0.0f;
-	speed = xyVel.length();
-	// remembering the value here prevents a display glitch if the
-	// animation gets toggled during this update.
-	bool was_sit_ground_constrained = isMotionActive(ANIM_AGENT_SIT_GROUND_CONSTRAINED);
-	
-	if (!(mIsSitting && getParent()))
+void LLVOAvatar::updateRootPositionAndRotation(LLAgent& agent, F32 speed, bool was_sit_ground_constrained) 
+{
+	if (!(isSitting() && getParent()))
 	{
 		// This case includes all configurations except sitting on an
 		// object, so does include ground sit.
@@ -3655,7 +4123,7 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 		{
 			mTimeLast = animation_time;
 
-			// put the pelvis at slaved position/mRotation
+			// Initially put the pelvis at slaved position/mRotation
 			// SL-315
 			mRoot->setWorldPosition( getPositionAgent() ); // first frame
 			mRoot->setWorldRotation( getRotation() );
@@ -3664,9 +4132,9 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 		//--------------------------------------------------------------------
 		// dont' let dT get larger than 1/5th of a second
 		//--------------------------------------------------------------------
-		F32 deltaTime = animation_time - mTimeLast;
+		F32 delta_time = animation_time - mTimeLast;
 
-		deltaTime = llclamp( deltaTime, DELTA_TIME_MIN, DELTA_TIME_MAX );
+		delta_time = llclamp( delta_time, DELTA_TIME_MIN, DELTA_TIME_MAX );
 		mTimeLast = animation_time;
 
 		mSpeedAccum = (mSpeedAccum * 0.95f) + (speed * 0.05f);
@@ -3685,7 +4153,7 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 		root_pos = gAgent.getPosGlobalFromAgent(getRenderPosition());
 		root_pos.mdV[VZ] += getVisualParamWeight(AVATAR_HOVER);
 
-
+        LLVector3 normal;
 		resolveHeightGlobal(root_pos, ground_under_pelvis, normal);
 		F32 foot_to_ground = (F32) (root_pos.mdV[VZ] - mPelvisToFoot - ground_under_pelvis.mdV[VZ]);				
 		BOOL in_air = ((!LLWorld::getInstance()->getRegionFromPosGlobal(ground_under_pelvis)) || 
@@ -3707,185 +4175,155 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 		// correct for the fact that the pelvis is not necessarily the center 
 		// of the agent's physical representation
 		root_pos.mdV[VZ] -= (0.5f * mBodySize.mV[VZ]) - mPelvisToFoot;
-		if (!mIsSitting && !was_sit_ground_constrained)
+		if (!isSitting() && !was_sit_ground_constrained)
 		{
 			root_pos += LLVector3d(getHoverOffset());
 		}
-		
-		LLVector3 newPosition = gAgent.getPosAgentFromGlobal(root_pos);
-
-
-		if (newPosition != mRoot->getXform()->getWorldPosition())
-		{		
-			mRoot->touch();
-			// SL-315
-			mRoot->setWorldPosition( newPosition ); // regular update				
-		}
 
+        LLControlAvatar *cav = dynamic_cast<LLControlAvatar*>(this);
+        if (cav)
+        {
+            // SL-1350: Moved to LLDrawable::updateXform()
+            cav->matchVolumeTransform();
+        }
+        else
+        {
+            LLVector3 newPosition = gAgent.getPosAgentFromGlobal(root_pos);
+            if (newPosition != mRoot->getXform()->getWorldPosition())
+            {		
+                mRoot->touch();
+                // SL-315
+                mRoot->setWorldPosition( newPosition ); // regular update				
+            }
+        }
 
 		//--------------------------------------------------------------------
 		// Propagate viewer object rotation to root of avatar
 		//--------------------------------------------------------------------
-		if (!isAnyAnimationSignaled(AGENT_NO_ROTATE_ANIMS, NUM_AGENT_NO_ROTATE_ANIMS))
+		if (!isControlAvatar() && !isAnyAnimationSignaled(AGENT_NO_ROTATE_ANIMS, NUM_AGENT_NO_ROTATE_ANIMS))
 		{
-			LLQuaternion iQ;
-			LLVector3 upDir( 0.0f, 0.0f, 1.0f );
-			
-			// Compute a forward direction vector derived from the primitive rotation
-			// and the velocity vector.  When walking or jumping, don't let body deviate
-			// more than 90 from the view, if necessary, flip the velocity vector.
-
-			LLVector3 primDir;
-			if (isSelf())
-			{
-				primDir = agent.getAtAxis() - projected_vec(agent.getAtAxis(), agent.getReferenceUpVector());
-				primDir.normalize();
-			}
-			else
-			{
-				primDir = getRotation().getMatrix3().getFwdRow();
-			}
-			LLVector3 velDir = getVelocity();
-			velDir.normalize();
-			if ( mSignaledAnimations.find(ANIM_AGENT_WALK) != mSignaledAnimations.end())
-			{
-				F32 vpD = velDir * primDir;
-				if (vpD < -0.5f)
-				{
-					velDir *= -1.0f;
-				}
-			}
-			LLVector3 fwdDir = lerp(primDir, velDir, clamp_rescale(speed, 0.5f, 2.0f, 0.0f, 1.0f));
-			if (isSelf() && gAgentCamera.cameraMouselook())
-			{
-				// make sure fwdDir stays in same general direction as primdir
-				if (gAgent.getFlying())
-				{
-					fwdDir = LLViewerCamera::getInstance()->getAtAxis();
-				}
-				else
-				{
-					LLVector3 at_axis = LLViewerCamera::getInstance()->getAtAxis();
-					LLVector3 up_vector = gAgent.getReferenceUpVector();
-					at_axis -= up_vector * (at_axis * up_vector);
-					at_axis.normalize();
-					
-					F32 dot = fwdDir * at_axis;
-					if (dot < 0.f)
-					{
-						fwdDir -= 2.f * at_axis * dot;
-						fwdDir.normalize();
-					}
-				}
-			}
-
-			LLQuaternion root_rotation = mRoot->getWorldMatrix().quaternion();
-			F32 root_roll, root_pitch, root_yaw;
-			root_rotation.getEulerAngles(&root_roll, &root_pitch, &root_yaw);
-
-			// When moving very slow, the pelvis is allowed to deviate from the
-			// forward direction to allow it to hold it's position while the torso
-			// and head turn.  Once in motion, it must conform however.
-			BOOL self_in_mouselook = isSelf() && gAgentCamera.cameraMouselook();
-
-			LLVector3 pelvisDir( mRoot->getWorldMatrix().getFwdRow4().mV );
-
-			static LLCachedControl<F32> s_pelvis_rot_threshold_slow(gSavedSettings, "AvatarRotateThresholdSlow", 60.0);
-			static LLCachedControl<F32> s_pelvis_rot_threshold_fast(gSavedSettings, "AvatarRotateThresholdFast", 2.0);
-
-			F32 pelvis_rot_threshold = clamp_rescale(speed, 0.1f, 1.0f, s_pelvis_rot_threshold_slow, s_pelvis_rot_threshold_fast);
-						
-			if (self_in_mouselook)
-			{
-				pelvis_rot_threshold *= MOUSELOOK_PELVIS_FOLLOW_FACTOR;
-			}
-			pelvis_rot_threshold *= DEG_TO_RAD;
-
-			F32 angle = angle_between( pelvisDir, fwdDir );
-
-			// The avatar's root is allowed to have a yaw that deviates widely
-			// from the forward direction, but if roll or pitch are off even
-			// a little bit we need to correct the rotation.
-			if(root_roll < 1.f * DEG_TO_RAD
-			   && root_pitch < 5.f * DEG_TO_RAD)
-			{
-				// smaller correction vector means pelvis follows prim direction more closely
-				if (!mTurning && angle > pelvis_rot_threshold*0.75f)
-				{
-					mTurning = TRUE;
-				}
-
-				// use tighter threshold when turning
-				if (mTurning)
-				{
-					pelvis_rot_threshold *= 0.4f;
-				}
-
-				// am I done turning?
-				if (angle < pelvis_rot_threshold)
-				{
-					mTurning = FALSE;
-				}
-
-				LLVector3 correction_vector = (pelvisDir - fwdDir) * clamp_rescale(angle, pelvis_rot_threshold*0.75f, pelvis_rot_threshold, 1.0f, 0.0f);
-				fwdDir += correction_vector;
-			}
-			else
-			{
-				mTurning = FALSE;
-			}
-
-			// Now compute the full world space rotation for the whole body (wQv)
-			LLVector3 leftDir = upDir % fwdDir;
-			leftDir.normalize();
-			fwdDir = leftDir % upDir;
-			LLQuaternion wQv( fwdDir, leftDir, upDir );
-
-			if (isSelf() && mTurning)
-			{
-				if ((fwdDir % pelvisDir) * upDir > 0.f)
-				{
-					gAgent.setControlFlags(AGENT_CONTROL_TURN_RIGHT);
-				}
-				else
-				{
-					gAgent.setControlFlags(AGENT_CONTROL_TURN_LEFT);
-				}
-			}
-
-			// Set the root rotation, but do so incrementally so that it
-			// lags in time by some fixed amount.
-			//F32 u = LLSmoothInterpolation::getInterpolant(PELVIS_LAG);
-			F32 pelvis_lag_time = 0.f;
-			if (self_in_mouselook)
-			{
-				pelvis_lag_time = PELVIS_LAG_MOUSELOOK;
-			}
-			else if (mInAir)
-			{
-				pelvis_lag_time = PELVIS_LAG_FLYING;
-				// increase pelvis lag time when moving slowly
-				pelvis_lag_time *= clamp_rescale(mSpeedAccum, 0.f, 15.f, 3.f, 1.f);
-			}
-			else
-			{
-				pelvis_lag_time = PELVIS_LAG_WALKING;
-			}
-
-			F32 u = llclamp((deltaTime / pelvis_lag_time), 0.0f, 1.0f);	
-
-			mRoot->setWorldRotation( slerp(u, mRoot->getWorldRotation(), wQv) );
-			
+            // Rotation fixups for avatars in motion.
+            // Skip for animated objects.
+            updateOrientation(agent, speed, delta_time);
 		}
 	}
 	else if (mDrawable.notNull())
 	{
+        // Sitting on an object - mRoot is slaved to mDrawable orientation.
 		LLVector3 pos = mDrawable->getPosition();
 		pos += getHoverOffset() * mDrawable->getRotation();
 		// SL-315
 		mRoot->setPosition(pos);
 		mRoot->setRotation(mDrawable->getRotation());
 	}
+}
+
+//------------------------------------------------------------------------
+// updateCharacter()
+//
+// This is called for all avatars, so there are 4 possible situations:
+//
+// 1) Avatar is your own. In this case the class is LLVOAvatarSelf,
+// isSelf() is true, and agent specifies the corresponding agent
+// information for you. In all the other cases, agent is irrelevant
+// and it would be less confusing if it were null or something.
+//
+// 2) Avatar is controlled by another resident. Class is LLVOAvatar,
+// and isSelf() is false.
+//
+// 3) Avatar is the controller for an animated object. Class is
+// LLControlAvatar and mIsDummy is true. Avatar is a purely
+// viewer-side entity with no representation on the simulator.
+//
+// 4) Avatar is a UI avatar used in some areas of the UI, such as when
+// previewing uploaded animations. Class is LLUIAvatar, and mIsDummy
+// is true. Avatar is purely viewer-side with no representation on the
+// simulator.
+//
+//------------------------------------------------------------------------
+BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
+{	
+	updateDebugText();
+	
+	if (!mIsBuilt)
+	{
+		return FALSE;
+	}
+
+	BOOL visible = isVisible();
+    bool is_control_avatar = isControlAvatar(); // capture state to simplify tracing
+	bool is_attachment = false;
+	if (is_control_avatar)
+	{
+        LLControlAvatar *cav = dynamic_cast<LLControlAvatar*>(this);
+		is_attachment = cav && cav->mRootVolp && cav->mRootVolp->isAttachment(); // For attached animated objects
+	}
+
+    LLScopedContextString str("updateCharacter " + getFullname() + " is_control_avatar "
+                              + boost::lexical_cast<std::string>(is_control_avatar) 
+                              + " is_attachment " + boost::lexical_cast<std::string>(is_attachment));
+
+	// For fading out the names above heads, only let the timer
+	// run if we're visible.
+	if (mDrawable.notNull() && !visible)
+	{
+		mTimeVisible.reset();
+	}
+
+	//--------------------------------------------------------------------
+	// The rest should only be done occasionally for far away avatars.
+    // Set mUpdatePeriod and visible based on distance and other criteria.
+	//--------------------------------------------------------------------
+    computeUpdatePeriod();
+    visible = (LLDrawable::getCurrentFrame()+mID.mData[0])%mUpdatePeriod == 0 ? TRUE : FALSE;
+
+	//--------------------------------------------------------------------
+    // Early out if not visible and not self
+	// don't early out for your own avatar, as we rely on your animations playing reliably
+	// for example, the "turn around" animation when entering customize avatar needs to trigger
+	// even when your avatar is offscreen
+	//--------------------------------------------------------------------
+	if (!visible && !isSelf())
+	{
+		updateMotions(LLCharacter::HIDDEN_UPDATE);
+		return FALSE;
+	}
+
+	//--------------------------------------------------------------------
+	// change animation time quanta based on avatar render load
+	//--------------------------------------------------------------------
+    // SL-763 the time step quantization does not currently work.
+    //updateTimeStep();
+    
+	//--------------------------------------------------------------------
+    // Update sitting state based on parent and active animation info.
+	//--------------------------------------------------------------------
+	if (getParent() && !isSitting())
+	{
+		sitOnObject((LLViewerObject*)getParent());
+	}
+	else if (!getParent() && isSitting() && !isMotionActive(ANIM_AGENT_SIT_GROUND_CONSTRAINED))
+	{
+		getOffObject();
+	}
+
+	//--------------------------------------------------------------------
+	// create local variables in world coords for region position values
+	//--------------------------------------------------------------------
+	LLVector3 xyVel = getVelocity();
+	xyVel.mV[VZ] = 0.0f;
+	F32 speed = xyVel.length();
+	// remembering the value here prevents a display glitch if the
+	// animation gets toggled during this update.
+	bool was_sit_ground_constrained = isMotionActive(ANIM_AGENT_SIT_GROUND_CONSTRAINED);
+
+	//--------------------------------------------------------------------
+    // This does a bunch of state updating, including figuring out
+    // whether av is in the air, setting mRoot position and rotation
+    // In some cases, calls updateOrientation() for a lot of the
+    // work
+    // --------------------------------------------------------------------
+    updateRootPositionAndRotation(agent, speed, was_sit_ground_constrained);
 	
 	//-------------------------------------------------------------------------
 	// Update character motions
@@ -3904,7 +4342,7 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 	}
 
 	// Special handling for sitting on ground.
-	if (!getParent() && (mIsSitting || was_sit_ground_constrained))
+	if (!getParent() && (isSitting() || was_sit_ground_constrained))
 	{
 		
 		F32 off_z = LLVector3d(getHoverOffset()).mdV[VZ];
@@ -3921,90 +4359,18 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 	// update head position
 	updateHeadOffset();
 
-	//-------------------------------------------------------------------------
-	// Find the ground under each foot, these are used for a variety
-	// of things that follow
-	//-------------------------------------------------------------------------
-	LLVector3 ankle_left_pos_agent = mFootLeftp->getWorldPosition();
-	LLVector3 ankle_right_pos_agent = mFootRightp->getWorldPosition();
-
-	LLVector3 ankle_left_ground_agent = ankle_left_pos_agent;
-	LLVector3 ankle_right_ground_agent = ankle_right_pos_agent;
-	resolveHeightAgent(ankle_left_pos_agent, ankle_left_ground_agent, normal);
-	resolveHeightAgent(ankle_right_pos_agent, ankle_right_ground_agent, normal);
-
-	F32 leftElev = llmax(-0.2f, ankle_left_pos_agent.mV[VZ] - ankle_left_ground_agent.mV[VZ]);
-	F32 rightElev = llmax(-0.2f, ankle_right_pos_agent.mV[VZ] - ankle_right_ground_agent.mV[VZ]);
-
-	if (!mIsSitting)
-	{
-		//-------------------------------------------------------------------------
-		// Figure out which foot is on ground
-		//-------------------------------------------------------------------------
-		if (!mInAir)
-		{
-			if ((leftElev < 0.0f) || (rightElev < 0.0f))
-			{
-				ankle_left_pos_agent = mFootLeftp->getWorldPosition();
-				ankle_right_pos_agent = mFootRightp->getWorldPosition();
-				leftElev = ankle_left_pos_agent.mV[VZ] - ankle_left_ground_agent.mV[VZ];
-				rightElev = ankle_right_pos_agent.mV[VZ] - ankle_right_ground_agent.mV[VZ];
-			}
-		}
-	}
-	
-	//-------------------------------------------------------------------------
 	// Generate footstep sounds when feet hit the ground
-	//-------------------------------------------------------------------------
-	const LLUUID AGENT_FOOTSTEP_ANIMS[] = {ANIM_AGENT_WALK, ANIM_AGENT_RUN, ANIM_AGENT_LAND};
-	const S32 NUM_AGENT_FOOTSTEP_ANIMS = LL_ARRAY_SIZE(AGENT_FOOTSTEP_ANIMS);
-
-	if ( gAudiop && isAnyAnimationSignaled(AGENT_FOOTSTEP_ANIMS, NUM_AGENT_FOOTSTEP_ANIMS) )
-	{
-		BOOL playSound = FALSE;
-		LLVector3 foot_pos_agent;
-
-		BOOL onGroundLeft = (leftElev <= 0.05f);
-		BOOL onGroundRight = (rightElev <= 0.05f);
-
-		// did left foot hit the ground?
-		if ( onGroundLeft && !mWasOnGroundLeft )
-		{
-			foot_pos_agent = ankle_left_pos_agent;
-			playSound = TRUE;
-		}
-
-		// did right foot hit the ground?
-		if ( onGroundRight && !mWasOnGroundRight )
-		{
-			foot_pos_agent = ankle_right_pos_agent;
-			playSound = TRUE;
-		}
-
-		mWasOnGroundLeft = onGroundLeft;
-		mWasOnGroundRight = onGroundRight;
-
-		if ( playSound )
-		{
-			const F32 STEP_VOLUME = 0.1f;
-			const LLUUID& step_sound_id = getStepSound();
-
-			LLVector3d foot_pos_global = gAgent.getPosGlobalFromAgent(foot_pos_agent);
-
-			if (LLViewerParcelMgr::getInstance()->canHearSound(foot_pos_global)
-				&& !LLMuteList::getInstance()->isMuted(getID(), LLMute::flagObjectSounds))
-			{
-				gAudiop->triggerSound(step_sound_id, getID(), STEP_VOLUME, LLAudioEngine::AUDIO_TYPE_AMBIENT, foot_pos_global);
-			}
-		}
-	}
+    updateFootstepSounds();
 
+	// Update child joints as needed.
 	mRoot->updateWorldMatrixChildren();
 
-	//mesh vertices need to be reskinned
-	mNeedsSkin = TRUE;
+	// System avatar mesh vertices need to be reskinned.
+    mNeedsSkin = TRUE;
+
 	return TRUE;
 }
+
 //-----------------------------------------------------------------------------
 // updateHeadOffset()
 //-----------------------------------------------------------------------------
@@ -4019,7 +4385,7 @@ void LLVOAvatar::updateHeadOffset()
 	{
 		midEyePt = midEyePt * ~mDrawable->getWorldRotation();
 	}
-	if (mIsSitting)
+	if (isSitting())
 	{
 		mHeadOffset = midEyePt;	
 	}
@@ -4115,7 +4481,7 @@ void LLVOAvatar::updateVisibility()
 
 	if (mIsDummy)
 	{
-		visible = TRUE;
+		visible = FALSE;
 	}
 	else if (mDrawable.isNull())
 	{
@@ -4229,7 +4595,8 @@ void LLVOAvatar::updateVisibility()
 	}
 	else
 	{
-		if (mMeshValid && mMeshInvisibleTime.getElapsedTimeF32() > TIME_BEFORE_MESH_CLEANUP)
+		if (mMeshValid &&
+            (isControlAvatar() || mMeshInvisibleTime.getElapsedTimeF32() > TIME_BEFORE_MESH_CLEANUP))
 		{
 			releaseMeshData();
 		}
@@ -4264,6 +4631,11 @@ U32 LLVOAvatar::renderSkinned()
 		return num_indices;
 	}
 
+    if (mDrawable.isNull())
+    {
+		return num_indices;
+    }
+
 	LLFace* face = mDrawable->getFace(0);
 
 	bool needs_rebuild = !face || !face->getVertexBuffer() || mDrawable->isState(LLDrawable::REBUILD_GEOMETRY);
@@ -4430,7 +4802,7 @@ U32 LLVOAvatar::renderSkinned()
 		{
 			if (!isSelf() || gAgent.needsRenderHead() || LLPipeline::sShadowRender)
 			{
-				if (isTextureVisible(TEX_HEAD_BAKED) || mIsDummy)
+				if (isTextureVisible(TEX_HEAD_BAKED) || isUIAvatar())
 				{
 					LLViewerJoint* head_mesh = getViewerJoint(MESH_ID_HEAD);
 					if (head_mesh)
@@ -4440,7 +4812,7 @@ U32 LLVOAvatar::renderSkinned()
 					first_pass = FALSE;
 				}
 			}
-			if (isTextureVisible(TEX_UPPER_BAKED) || mIsDummy)
+			if (isTextureVisible(TEX_UPPER_BAKED) || isUIAvatar())
 			{
 				LLViewerJoint* upper_mesh = getViewerJoint(MESH_ID_UPPER_BODY);
 				if (upper_mesh)
@@ -4450,7 +4822,7 @@ U32 LLVOAvatar::renderSkinned()
 				first_pass = FALSE;
 			}
 			
-			if (isTextureVisible(TEX_LOWER_BAKED) || mIsDummy)
+			if (isTextureVisible(TEX_LOWER_BAKED) || isUIAvatar())
 			{
 				LLViewerJoint* lower_mesh = getViewerJoint(MESH_ID_LOWER_BODY);
 				if (lower_mesh)
@@ -4479,7 +4851,7 @@ U32 LLVOAvatar::renderSkinned()
 U32 LLVOAvatar::renderTransparent(BOOL first_pass)
 {
 	U32 num_indices = 0;
-	if( isWearingWearableType( LLWearableType::WT_SKIRT ) && (mIsDummy || isTextureVisible(TEX_SKIRT_BAKED)) )
+	if( isWearingWearableType( LLWearableType::WT_SKIRT ) && (isUIAvatar() || isTextureVisible(TEX_SKIRT_BAKED)) )
 	{
 		gGL.setAlphaRejectSettings(LLRender::CF_GREATER, 0.25f);
 		LLViewerJoint* skirt_mesh = getViewerJoint(MESH_ID_SKIRT);
@@ -4507,18 +4879,15 @@ U32 LLVOAvatar::renderTransparent(BOOL first_pass)
 			}
 			first_pass = FALSE;
 		}
-		// Can't test for baked hair being defined, since that won't always be the case (not all viewers send baked hair)
-		// TODO: 1.25 will be able to switch this logic back to calling isTextureVisible();
-		if ( (getImage(TEX_HAIR_BAKED, 0) && getImage(TEX_HAIR_BAKED, 0)->getID() != IMG_INVISIBLE)
-			|| LLDrawPoolAlpha::sShowDebugAlpha)		
-		{
-			LLViewerJoint* hair_mesh = getViewerJoint(MESH_ID_HAIR);
-			if (hair_mesh)
-			{
-				num_indices += hair_mesh->render(mAdjustedPixelArea, first_pass, mIsDummy);
-			}
-			first_pass = FALSE;
-		}
+		if (isTextureVisible(TEX_HAIR_BAKED))
+        {
+            LLViewerJoint* hair_mesh = getViewerJoint(MESH_ID_HAIR);
+            if (hair_mesh)
+            {
+                num_indices += hair_mesh->render(mAdjustedPixelArea, first_pass, mIsDummy);
+            }
+            first_pass = FALSE;
+        }
 		if (LLPipeline::sImpostorRender)
 		{
 			gGL.setAlphaRejectSettings(LLRender::CF_DEFAULT);
@@ -4558,7 +4927,7 @@ U32 LLVOAvatar::renderRigid()
 		gGL.setAlphaRejectSettings(LLRender::CF_GREATER, 0.5f);
 	}
 
-	if (isTextureVisible(TEX_EYES_BAKED)  || mIsDummy)
+	if (isTextureVisible(TEX_EYES_BAKED)  || isUIAvatar())
 	{
 		LLViewerJoint* eyeball_left = getViewerJoint(MESH_ID_EYEBALL_LEFT);
 		LLViewerJoint* eyeball_right = getViewerJoint(MESH_ID_EYEBALL_RIGHT);
@@ -4596,22 +4965,53 @@ U32 LLVOAvatar::renderImpostor(LLColor4U color, S32 diffuse_channel)
 	left *= mImpostorDim.mV[0];
 	up *= mImpostorDim.mV[1];
 
-	LLGLEnable test(GL_ALPHA_TEST);
-	gGL.setAlphaRejectSettings(LLRender::CF_GREATER, 0.f);
-
-	gGL.color4ubv(color.mV);
-	gGL.getTexUnit(diffuse_channel)->bind(&mImpostor);
-	gGL.begin(LLRender::QUADS);
-	gGL.texCoord2f(0,0);
-	gGL.vertex3fv((pos+left-up).mV);
-	gGL.texCoord2f(1,0);
-	gGL.vertex3fv((pos-left-up).mV);
-	gGL.texCoord2f(1,1);
-	gGL.vertex3fv((pos-left+up).mV);
-	gGL.texCoord2f(0,1);
-	gGL.vertex3fv((pos+left+up).mV);
-	gGL.end();
-	gGL.flush();
+	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_IMPOSTORS))
+	{
+		LLGLEnable blend(GL_BLEND);
+		gGL.setSceneBlendType(LLRender::BT_ADD);
+		gGL.getTexUnit(diffuse_channel)->unbind(LLTexUnit::TT_TEXTURE);
+
+		// gGL.begin(LLRender::QUADS);
+		// gGL.vertex3fv((pos+left-up).mV);
+		// gGL.vertex3fv((pos-left-up).mV);
+		// gGL.vertex3fv((pos-left+up).mV);
+		// gGL.vertex3fv((pos+left+up).mV);
+		// gGL.end();
+
+
+		gGL.begin(LLRender::LINES); 
+		gGL.color4f(1.f,1.f,1.f,1.f);
+		F32 thickness = llmax(F32(5.0f-5.0f*(gFrameTimeSeconds-mLastImpostorUpdateFrameTime)),1.0f);
+		glLineWidth(thickness);
+		gGL.vertex3fv((pos+left-up).mV);
+		gGL.vertex3fv((pos-left-up).mV);
+		gGL.vertex3fv((pos-left-up).mV);
+		gGL.vertex3fv((pos-left+up).mV);
+		gGL.vertex3fv((pos-left+up).mV);
+		gGL.vertex3fv((pos+left+up).mV);
+		gGL.vertex3fv((pos+left+up).mV);
+		gGL.vertex3fv((pos+left-up).mV);
+		gGL.end();
+		gGL.flush();
+	}
+	{
+		LLGLEnable test(GL_ALPHA_TEST);
+		gGL.setAlphaRejectSettings(LLRender::CF_GREATER, 0.f);
+
+		gGL.color4ubv(color.mV);
+		gGL.getTexUnit(diffuse_channel)->bind(&mImpostor);
+		gGL.begin(LLRender::QUADS);
+		gGL.texCoord2f(0,0);
+		gGL.vertex3fv((pos+left-up).mV);
+		gGL.texCoord2f(1,0);
+		gGL.vertex3fv((pos-left-up).mV);
+		gGL.texCoord2f(1,1);
+		gGL.vertex3fv((pos-left+up).mV);
+		gGL.texCoord2f(0,1);
+		gGL.vertex3fv((pos+left+up).mV);
+		gGL.end();
+		gGL.flush();
+	}
 
 	return 6;
 }
@@ -5105,10 +5505,13 @@ void LLVOAvatar::processAnimationStateChanges()
 		startMotion(ANIM_AGENT_WALK_ADJUST);
 		stopMotion(ANIM_AGENT_FLY_ADJUST);
 	}
-	else if (mInAir && !mIsSitting)
+	else if (mInAir && !isSitting())
 	{
 		stopMotion(ANIM_AGENT_WALK_ADJUST);
-		startMotion(ANIM_AGENT_FLY_ADJUST);
+        if (mEnableDefaultMotions)
+        {
+            startMotion(ANIM_AGENT_FLY_ADJUST);
+        }
 	}
 	else
 	{
@@ -5118,13 +5521,19 @@ void LLVOAvatar::processAnimationStateChanges()
 
 	if ( isAnyAnimationSignaled(AGENT_GUN_AIM_ANIMS, NUM_AGENT_GUN_AIM_ANIMS) )
 	{
-		startMotion(ANIM_AGENT_TARGET);
+        if (mEnableDefaultMotions)
+        {
+            startMotion(ANIM_AGENT_TARGET);
+        }
 		stopMotion(ANIM_AGENT_BODY_NOISE);
 	}
 	else
 	{
 		stopMotion(ANIM_AGENT_TARGET);
-		startMotion(ANIM_AGENT_BODY_NOISE);
+        if (mEnableDefaultMotions)
+        {
+            startMotion(ANIM_AGENT_BODY_NOISE);
+        }
 	}
 	
 	// clear all current animations
@@ -5488,72 +5897,30 @@ bool LLVOAvatar::getRiggedMeshID(LLViewerObject* pVO, LLUUID& mesh_id)
 		LLVOVolume* pVObj = pVO->mDrawable->getVOVolume();
 		if ( pVObj )
 		{
-			const LLMeshSkinInfo* pSkinData = gMeshRepo.getSkinInfo( pVObj->getVolume()->getParams().getSculptID(), pVObj );
+			const LLMeshSkinInfo* pSkinData = pVObj->getSkinInfo();
 			if (pSkinData 
 				&& pSkinData->mJointNames.size() > JOINT_COUNT_REQUIRED_FOR_FULLRIG	// full rig
 				&& pSkinData->mAlternateBindMatrix.size() > 0 )
-					{				
-						mesh_id = pSkinData->mMeshID;
-						return true;
-					}
-		}
-	}
-	return false;
-}
-
-bool LLVOAvatar::jointIsRiggedTo(const std::string& joint_name)
-{
-	for (attachment_map_t::iterator iter = mAttachmentPoints.begin(); 
-		 iter != mAttachmentPoints.end();
-		 ++iter)
-	{
-		LLViewerJointAttachment* attachment = iter->second;
-        for (LLViewerJointAttachment::attachedobjs_vec_t::iterator attachment_iter = attachment->mAttachedObjects.begin();
-             attachment_iter != attachment->mAttachedObjects.end();
-             ++attachment_iter)
-        {
-            const LLViewerObject* attached_object = (*attachment_iter);
-            if (attached_object && jointIsRiggedTo(joint_name, attached_object))
-            {
+            {				
+                mesh_id = pSkinData->mMeshID;
                 return true;
             }
-        }
+		}
 	}
-    return false;
+	return false;
 }
 
-bool LLVOAvatar::jointIsRiggedTo(const std::string& joint_name, const LLViewerObject *vo)
+bool LLVOAvatar::jointIsRiggedTo(const LLJoint *joint) const
 {
-	// Process all children
-	LLViewerObject::const_child_list_t& children = vo->getChildren();
-	for (LLViewerObject::const_child_list_t::const_iterator it = children.begin();
-		 it != children.end(); ++it)
-	{
-		LLViewerObject *childp = *it;
-        if (jointIsRiggedTo(joint_name,childp))
-        {
-            return true;
-        }
-	}
-
-	const LLVOVolume *vobj = dynamic_cast<const LLVOVolume*>(vo);
-	if (!vobj)
-	{
-		return false;
-	}
-
-	LLUUID currentId = vobj->getVolume()->getParams().getSculptID();						
-	const LLMeshSkinInfo*  pSkinData = gMeshRepo.getSkinInfo( currentId, vobj );
-
-	if ( vobj && vobj->isAttachment() && vobj->isMesh() && pSkinData )
-	{
-        if (std::find(pSkinData->mJointNames.begin(), pSkinData->mJointNames.end(), joint_name) !=
-            pSkinData->mJointNames.end())
+    if (joint)
+    {
+        const LLJointRiggingInfoTab& tab = mJointRiggingInfoTab;
+        S32 joint_num = joint->getJointNum();
+        if (joint_num < tab.size() && tab[joint_num].isRiggedTo())
         {
             return true;
         }
     }
-
     return false;
 }
 
@@ -5570,6 +5937,20 @@ void LLVOAvatar::clearAttachmentOverrides()
 			pJoint->clearAttachmentScaleOverrides();
         }
     }
+
+    if (mPelvisFixups.count()>0)
+    {
+        mPelvisFixups.clear();
+        LLJoint* pJointPelvis = getJoint("mPelvis");
+        if (pJointPelvis)
+        {
+			pJointPelvis->setPosition( LLVector3( 0.0f, 0.0f, 0.0f) );
+        }
+        postPelvisSetRecalc();	
+    }
+
+    mActiveOverrideMeshes.clear();
+    onActiveOverrideMeshesChanged();
 }
 
 //-----------------------------------------------------------------------------
@@ -5579,7 +5960,25 @@ void LLVOAvatar::rebuildAttachmentOverrides()
 {
     LLScopedContextString str("rebuildAttachmentOverrides " + getFullname());
 
-    // Attachment points
+    LL_DEBUGS("AnimatedObjects") << "rebuilding" << LL_ENDL;
+    dumpStack("AnimatedObjectsStack");
+    
+    clearAttachmentOverrides();
+
+    // Handle the case that we're resetting the skeleton of an animated object.
+    LLControlAvatar *control_av = dynamic_cast<LLControlAvatar*>(this);
+    if (control_av)
+    {
+        LLVOVolume *volp = control_av->mRootVolp;
+        if (volp)
+        {
+            LL_DEBUGS("Avatar") << volp->getID() << " adding attachment overrides for root vol, prim count " 
+                                << (S32) (1+volp->numChildren()) << LL_ENDL;
+            addAttachmentOverridesForObject(volp);
+        }
+    }
+
+    // Attached objects
 	for (attachment_map_t::iterator iter = mAttachmentPoints.begin();
 		 iter != mAttachmentPoints.end();
 		 ++iter)
@@ -5590,33 +5989,164 @@ void LLVOAvatar::rebuildAttachmentOverrides()
             for (LLViewerJointAttachment::attachedobjs_vec_t::iterator at_it = attachment_pt->mAttachedObjects.begin();
 				 at_it != attachment_pt->mAttachedObjects.end(); ++at_it)
             {
-                addAttachmentOverridesForObject(*at_it);
+                LLViewerObject *vo = *at_it;
+                // Attached animated objects affect joints in their control
+                // avs, not the avs to which they are attached.
+                if (!vo->isAnimatedObject())
+                {
+                    addAttachmentOverridesForObject(vo);
+                }
             }
         }
     }
 }
+
 //-----------------------------------------------------------------------------
-// addAttachmentPosOverridesForObject
-//-----------------------------------------------------------------------------
-void LLVOAvatar::addAttachmentOverridesForObject(LLViewerObject *vo)
+// updateAttachmentOverrides
+//
+// This is intended to give the same results as
+// rebuildAttachmentOverrides(), while avoiding redundant work.
+// -----------------------------------------------------------------------------
+void LLVOAvatar::updateAttachmentOverrides()
 {
-	LLVOAvatar *av = vo->getAvatarAncestor();
-	if (!av || (av != this))
+    LLScopedContextString str("updateAttachmentOverrides " + getFullname());
+
+    LL_DEBUGS("AnimatedObjects") << "updating" << LL_ENDL;
+    dumpStack("AnimatedObjectsStack");
+
+    std::set<LLUUID> meshes_seen;
+    
+    // Handle the case that we're updating the skeleton of an animated object.
+    LLControlAvatar *control_av = dynamic_cast<LLControlAvatar*>(this);
+    if (control_av)
+    {
+        LLVOVolume *volp = control_av->mRootVolp;
+        if (volp)
+        {
+            LL_DEBUGS("Avatar") << volp->getID() << " adding attachment overrides for root vol, prim count " 
+                                << (S32) (1+volp->numChildren()) << LL_ENDL;
+            addAttachmentOverridesForObject(volp, &meshes_seen);
+        }
+    }
+
+    // Attached objects
+	for (attachment_map_t::iterator iter = mAttachmentPoints.begin();
+		 iter != mAttachmentPoints.end();
+		 ++iter)
 	{
+		LLViewerJointAttachment *attachment_pt = (*iter).second;
+        if (attachment_pt)
+        {
+            for (LLViewerJointAttachment::attachedobjs_vec_t::iterator at_it = attachment_pt->mAttachedObjects.begin();
+				 at_it != attachment_pt->mAttachedObjects.end(); ++at_it)
+            {
+                LLViewerObject *vo = *at_it;
+                // Attached animated objects affect joints in their control
+                // avs, not the avs to which they are attached.
+                if (!vo->isAnimatedObject())
+                {
+                    addAttachmentOverridesForObject(vo, &meshes_seen);
+                }
+            }
+        }
+    }
+    // Remove meshes that are no longer present on the skeleton
+
+	// have to work with a copy because removeAttachmentOverrides() will change mActiveOverrideMeshes.
+    std::set<LLUUID> active_override_meshes = mActiveOverrideMeshes; 
+    for (std::set<LLUUID>::iterator it = active_override_meshes.begin(); it != active_override_meshes.end(); ++it)
+    {
+        if (meshes_seen.find(*it) == meshes_seen.end())
+        {
+            removeAttachmentOverridesForObject(*it);
+        }
+    }
+
+
+#ifdef ATTACHMENT_OVERRIDE_VALIDATION
+    {
+        std::vector<LLVector3OverrideMap> pos_overrides_by_joint;
+        std::vector<LLVector3OverrideMap> scale_overrides_by_joint;
+        LLVector3OverrideMap pelvis_fixups;
+
+        // Capture snapshot of override state after update
+        for (S32 joint_num = 0; joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS; joint_num++)
+        {
+            LLVector3OverrideMap pos_overrides;
+            LLJoint *joint = getJoint(joint_num);
+            if (joint)
+            {
+                pos_overrides_by_joint.push_back(joint->m_attachmentPosOverrides);
+                scale_overrides_by_joint.push_back(joint->m_attachmentScaleOverrides);
+            }
+            else
+            {
+                // No joint, use default constructed empty maps
+                pos_overrides_by_joint.push_back(LLVector3OverrideMap());
+                scale_overrides_by_joint.push_back(LLVector3OverrideMap());
+            }
+        }
+        pelvis_fixups = mPelvisFixups;
+        //dumpArchetypeXML(getFullname() + "_paranoid_updated");
+
+        // Rebuild and compare
+        rebuildAttachmentOverrides();
+        //dumpArchetypeXML(getFullname() + "_paranoid_rebuilt");
+        bool mismatched = false;
+        for (S32 joint_num = 0; joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS; joint_num++)
+        {
+            LLJoint *joint = getJoint(joint_num);
+            if (joint)
+            {
+                if (pos_overrides_by_joint[joint_num] != joint->m_attachmentPosOverrides)
+                {
+                    mismatched = true;
+                }
+                if (scale_overrides_by_joint[joint_num] != joint->m_attachmentScaleOverrides)
+                {
+                    mismatched = true;
+                }
+            }
+        }
+        if (pelvis_fixups != mPelvisFixups)
+        {
+            mismatched = true;
+        }
+        if (mismatched)
+        {
+            LL_WARNS() << "MISMATCHED ATTACHMENT OVERRIDES" << LL_ENDL;
+        }
+    }
+#endif
+}
+
+//-----------------------------------------------------------------------------
+// addAttachmentOverridesForObject
+//-----------------------------------------------------------------------------
+void LLVOAvatar::addAttachmentOverridesForObject(LLViewerObject *vo, std::set<LLUUID>* meshes_seen, bool recursive)
+{
+    if (vo->getAvatar() != this && vo->getAvatarAncestor() != this)
+    {
 		LL_WARNS("Avatar") << "called with invalid avatar" << LL_ENDL;
         return;
-	}
+    }
 
-    LLScopedContextString str("addAttachmentOverridesForObject " + av->getFullname());
+    LLScopedContextString str("addAttachmentOverridesForObject " + getFullname());
+    
+    LL_DEBUGS("AnimatedObjects") << "adding" << LL_ENDL;
+    dumpStack("AnimatedObjectsStack");
     
 	// Process all children
-	LLViewerObject::const_child_list_t& children = vo->getChildren();
-	for (LLViewerObject::const_child_list_t::const_iterator it = children.begin();
-		 it != children.end(); ++it)
-	{
-		LLViewerObject *childp = *it;
-		addAttachmentOverridesForObject(childp);
-	}
+    if (recursive)
+    {
+        LLViewerObject::const_child_list_t& children = vo->getChildren();
+        for (LLViewerObject::const_child_list_t::const_iterator it = children.begin();
+             it != children.end(); ++it)
+        {
+            LLViewerObject *childp = *it;
+            addAttachmentOverridesForObject(childp, meshes_seen, true);
+        }
+    }
 
 	LLVOVolume *vobj = dynamic_cast<LLVOVolume*>(vo);
 	bool pelvisGotSet = false;
@@ -5625,15 +6155,18 @@ void LLVOAvatar::addAttachmentOverridesForObject(LLViewerObject *vo)
 	{
 		return;
 	}
+
+	LLViewerObject *root_object = (LLViewerObject*)vobj->getRoot();
+    LL_DEBUGS("AnimatedObjects") << "trying to add attachment overrides for root object " << root_object->getID() << " prim is " << vobj << LL_ENDL;
 	if (vobj->isMesh() &&
 		((vobj->getVolume() && !vobj->getVolume()->isMeshAssetLoaded()) || !gMeshRepo.meshRezEnabled()))
 	{
+        LL_DEBUGS("AnimatedObjects") << "failed to add attachment overrides for root object " << root_object->getID() << " mesh asset not loaded" << LL_ENDL;
 		return;
 	}
-	LLUUID currentId = vobj->getVolume()->getParams().getSculptID();						
-	const LLMeshSkinInfo*  pSkinData = gMeshRepo.getSkinInfo( currentId, vobj );
+	const LLMeshSkinInfo*  pSkinData = vobj->getSkinInfo();
 
-	if ( vobj && vobj->isAttachment() && vobj->isMesh() && pSkinData )
+	if ( vobj && vobj->isMesh() && pSkinData )
 	{
 		const int bindCnt = pSkinData->mAlternateBindMatrix.size();								
         const int jointCnt = pSkinData->mJointNames.size();
@@ -5645,8 +6178,26 @@ void LLVOAvatar::addAttachmentOverridesForObject(LLViewerObject *vo)
 		{					
 			const F32 pelvisZOffset = pSkinData->mPelvisOffset;
 			const LLUUID& mesh_id = pSkinData->mMeshID;
+
+            if (meshes_seen)
+            {
+                meshes_seen->insert(mesh_id);
+            }
+            bool mesh_overrides_loaded = (mActiveOverrideMeshes.find(mesh_id) != mActiveOverrideMeshes.end());
+            if (mesh_overrides_loaded)
+            {
+                LL_DEBUGS("AnimatedObjects") << "skipping add attachment overrides for " << mesh_id 
+                                             << " to root object " << root_object->getID()
+                                             << ", already loaded"
+                                             << LL_ENDL;
+            }
+            else
+            {
+                LL_DEBUGS("AnimatedObjects") << "adding attachment overrides for " << mesh_id 
+                                             << " to root object " << root_object->getID() << LL_ENDL;
+            }
 			bool fullRig = (jointCnt>=JOINT_COUNT_REQUIRED_FOR_FULLRIG) ? true : false;								
-			if ( fullRig )
+			if ( fullRig && !mesh_overrides_loaded )
 			{								
 				for ( int i=0; i<jointCnt; ++i )
 				{
@@ -5690,9 +6241,15 @@ void LLVOAvatar::addAttachmentOverridesForObject(LLViewerObject *vo)
                     }
                     
 				}
+                mActiveOverrideMeshes.insert(mesh_id);
+                onActiveOverrideMeshesChanged();
 			}							
 		}
 	}
+    else
+    {
+        LL_DEBUGS("AnimatedObjects") << "failed to add attachment overrides for root object " << root_object->getID() << " not mesh or no pSkinData" << LL_ENDL;
+    }
 					
 	//Rebuild body data if we altered joints/pelvis
 	if ( pelvisGotSet ) 
@@ -5815,14 +6372,14 @@ void LLVOAvatar::showAttachmentOverrides(bool verbose) const
 }
 
 //-----------------------------------------------------------------------------
-// resetJointsOnDetach
+// removeAttachmentOverridesForObject
 //-----------------------------------------------------------------------------
-void LLVOAvatar::resetJointsOnDetach(LLViewerObject *vo)
+void LLVOAvatar::removeAttachmentOverridesForObject(LLViewerObject *vo)
 {
-	LLVOAvatar *av = vo->getAvatarAncestor();
-	if (!av || (av != this))
+    if (vo->getAvatar() != this && vo->getAvatarAncestor() != this)
 	{
 		LL_WARNS("Avatar") << "called with invalid avatar" << LL_ENDL;
+        return;
 	}
 		
 	// Process all children
@@ -5831,37 +6388,32 @@ void LLVOAvatar::resetJointsOnDetach(LLViewerObject *vo)
 		 it != children.end(); ++it)
 	{
 		LLViewerObject *childp = *it;
-		resetJointsOnDetach(childp);
+		removeAttachmentOverridesForObject(childp);
 	}
 
 	// Process self.
 	LLUUID mesh_id;
 	if (getRiggedMeshID(vo,mesh_id))
 	{
-		resetJointsOnDetach(mesh_id);
+		removeAttachmentOverridesForObject(mesh_id);
 	}
 }
 
 //-----------------------------------------------------------------------------
-// resetJointsOnDetach
+// removeAttachmentOverridesForObject
 //-----------------------------------------------------------------------------
-void LLVOAvatar::resetJointsOnDetach(const LLUUID& mesh_id)
+void LLVOAvatar::removeAttachmentOverridesForObject(const LLUUID& mesh_id)
 {	
-	//Subsequent joints are relative to pelvis
-	avatar_joint_list_t::iterator iter = mSkeleton.begin();
-	avatar_joint_list_t::iterator end  = mSkeleton.end();
-
 	LLJoint* pJointPelvis = getJoint("mPelvis");
-	
-	for (; iter != end; ++iter)
-	{
-		LLJoint* pJoint = (*iter);
-		//Reset joints except for pelvis
+    const std::string av_string = avString();
+    for (S32 joint_num = 0; joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS; joint_num++)
+    {
+        LLJoint *pJoint = getJoint(joint_num);
 		if ( pJoint )
 		{			
             bool dummy; // unused
-			pJoint->removeAttachmentPosOverride(mesh_id, avString(),dummy);
-			pJoint->removeAttachmentScaleOverride(mesh_id, avString());
+			pJoint->removeAttachmentPosOverride(mesh_id, av_string, dummy);
+			pJoint->removeAttachmentScaleOverride(mesh_id, av_string);
 		}		
 		if ( pJoint && pJoint == pJointPelvis)
 		{
@@ -5872,6 +6424,9 @@ void LLVOAvatar::resetJointsOnDetach(const LLUUID& mesh_id)
 	}	
 		
 	postPelvisSetRecalc();	
+
+    mActiveOverrideMeshes.erase(mesh_id);
+    onActiveOverrideMeshesChanged();
 }
 //-----------------------------------------------------------------------------
 // getCharacterPosition()
@@ -5923,7 +6478,7 @@ void LLVOAvatar::getGround(const LLVector3 &in_pos_agent, LLVector3 &out_pos_age
 	LLVector3d z_vec(0.0f, 0.0f, 1.0f);
 	LLVector3d p0_global, p1_global;
 
-	if (mIsDummy)
+	if (isUIAvatar())
 	{
 		outNorm.setVec(z_vec);
 		out_pos_agent = in_pos_agent;
@@ -5952,7 +6507,7 @@ F32 LLVOAvatar::getTimeDilation()
 //-----------------------------------------------------------------------------
 F32 LLVOAvatar::getPixelArea() const
 {
-	if (mIsDummy)
+	if (isUIAvatar())
 	{
 		return 100000.f;
 	}
@@ -6386,7 +6941,7 @@ void LLVOAvatar::removeChild(LLViewerObject *childp)
 
 LLViewerJointAttachment* LLVOAvatar::getTargetAttachmentPoint(LLViewerObject* viewer_object)
 {
-	S32 attachmentID = ATTACHMENT_ID_FROM_STATE(viewer_object->getState());
+	S32 attachmentID = ATTACHMENT_ID_FROM_STATE(viewer_object->getAttachmentState());
 
 	// This should never happen unless the server didn't process the attachment point
 	// correctly, but putting this check in here to be safe.
@@ -6449,6 +7004,11 @@ const LLViewerJointAttachment *LLVOAvatar::attachObject(LLViewerObject *viewer_o
 		return 0;
 	}
 
+    if (!viewer_object->isAnimatedObject())
+    {
+        updateAttachmentOverrides();
+    }
+
 	updateVisualComplexity();
 
 	if (viewer_object->isSelected())
@@ -6478,19 +7038,62 @@ U32 LLVOAvatar::getNumAttachments() const
 
 //-----------------------------------------------------------------------------
 // canAttachMoreObjects()
+// Returns true if we can attach <n> more objects.
 //-----------------------------------------------------------------------------
-BOOL LLVOAvatar::canAttachMoreObjects() const
+BOOL LLVOAvatar::canAttachMoreObjects(U32 n) const
 {
-	return (getNumAttachments() < MAX_AGENT_ATTACHMENTS);
+	return (getNumAttachments() + n) <= MAX_AGENT_ATTACHMENTS;
 }
 
 //-----------------------------------------------------------------------------
-// canAttachMoreObjects()
-// Returns true if we can attach <n> more objects.
+// getNumAnimatedObjectAttachments()
 //-----------------------------------------------------------------------------
-BOOL LLVOAvatar::canAttachMoreObjects(U32 n) const
+U32 LLVOAvatar::getNumAnimatedObjectAttachments() const
 {
-	return (getNumAttachments() + n) <= MAX_AGENT_ATTACHMENTS;
+	U32 num_attachments = 0;
+	for (attachment_map_t::const_iterator iter = mAttachmentPoints.begin();
+		 iter != mAttachmentPoints.end();
+		 ++iter)
+	{
+		const LLViewerJointAttachment *attachment_pt = (*iter).second;
+		num_attachments += attachment_pt->getNumAnimatedObjects();
+	}
+	return num_attachments;
+}
+
+//-----------------------------------------------------------------------------
+// getMaxAnimatedObjectAttachments()
+// Gets from simulator feature if available, otherwise 0.
+//-----------------------------------------------------------------------------
+S32 LLVOAvatar::getMaxAnimatedObjectAttachments() const
+{
+    S32 max_attach = 0;
+    if (gSavedSettings.getBOOL("AnimatedObjectsIgnoreLimits"))
+    {
+        max_attach = MAX_AGENT_ATTACHMENTS;
+    }
+    else
+    {
+        if (gAgent.getRegion())
+        {
+            LLSD features;
+            gAgent.getRegion()->getSimulatorFeatures(features);
+            if (features.has("AnimatedObjects"))
+            {
+                max_attach = features["AnimatedObjects"]["MaxAgentAnimatedObjectAttachments"].asInteger();
+            }
+        }
+    }
+    return max_attach;
+}
+
+//-----------------------------------------------------------------------------
+// canAttachMoreAnimatedObjects()
+// Returns true if we can attach <n> more animated objects.
+//-----------------------------------------------------------------------------
+BOOL LLVOAvatar::canAttachMoreAnimatedObjects(U32 n) const
+{
+	return (getNumAnimatedObjectAttachments() + n) <= getMaxAnimatedObjectAttachments();
 }
 
 //-----------------------------------------------------------------------------
@@ -6581,7 +7184,7 @@ void LLVOAvatar::cleanupAttachedMesh( LLViewerObject* pVO )
 	LLUUID mesh_id;
 	if (getRiggedMeshID(pVO, mesh_id))
 	{
-		resetJointsOnDetach(mesh_id);
+        // FIXME this seems like an odd place for this code.
 		if ( gAgentCamera.cameraCustomizeAvatar() )
 		{
 			gAgent.unpauseAnimation();
@@ -6606,9 +7209,13 @@ BOOL LLVOAvatar::detachObject(LLViewerObject *viewer_object)
 		if (attachment->isObjectAttached(viewer_object))
 		{
             updateVisualComplexity();
+            bool is_animated_object = viewer_object->isAnimatedObject();
 			cleanupAttachedMesh( viewer_object );
-		
 			attachment->removeObject(viewer_object);
+            if (!is_animated_object)
+            {
+                updateAttachmentOverrides();
+            }
 			LL_DEBUGS() << "Detaching object " << viewer_object->mID << " from " << attachment->getName() << LL_ENDL;
 			return TRUE;
 		}
@@ -6742,7 +7349,10 @@ void LLVOAvatar::getOffObject()
 	mRoot->setRotation(cur_rotation_world);
 	mRoot->getXform()->update();
 
-	startMotion(ANIM_AGENT_BODY_NOISE);
+    if (mEnableDefaultMotions)
+    {
+        startMotion(ANIM_AGENT_BODY_NOISE);
+    }
 
 	if (isSelf())
 	{
@@ -6900,6 +7510,18 @@ void LLVOAvatar::onGlobalColorChanged(const LLTexGlobalColor* global_color)
 	updateMeshTextures();
 }
 
+// virtual
+bool LLVOAvatar::shouldRenderRigged() const
+{
+    return true;
+}
+
+// FIXME: We have an mVisible member, set in updateVisibility(), but this
+// function doesn't return it! isVisible() and mVisible are used
+// different places for different purposes. mVisible seems to be more
+// related to whether the actual avatar mesh is shown, and isVisible()
+// to whether anything about the avatar is displayed in the scene.
+// Maybe better naming could make this clearer?
 BOOL LLVOAvatar::isVisible() const
 {
 	return mDrawable.notNull()
@@ -6910,6 +7532,11 @@ BOOL LLVOAvatar::isVisible() const
 // Determine if we have enough avatar data to render
 bool LLVOAvatar::getIsCloud() const
 {
+	if (mIsDummy)
+	{
+		return false;
+	}
+
 	return (   ((const_cast<LLVOAvatar*>(this))->visualParamWeightsAreDefault())// Do we have a shape?
 			|| (   !isTextureDefined(TEX_LOWER_BAKED)
 				|| !isTextureDefined(TEX_UPPER_BAKED)
@@ -7189,9 +7816,9 @@ bool LLVOAvatar::isTooComplex() const
         // so that unlimited will completely disable the overly complex impostor rendering
         // yes, this leaves them vulnerable to griefing objects... their choice
         too_complex = (   max_render_cost > 0
-                       && (   mVisualComplexity > max_render_cost
-                           || (max_attachment_area > 0.0f && mAttachmentSurfaceArea > max_attachment_area)
-                           ));
+                          && (mVisualComplexity > max_render_cost
+                                 || (max_attachment_area > 0.0f && mAttachmentSurfaceArea > max_attachment_area)
+                              ));
 	}
 
 	return too_complex;
@@ -8696,8 +9323,43 @@ void LLVOAvatar::dumpArchetypeXML(const std::string& prefix, bool group_by_weara
 							 pelvis_fixup, mesh_id.asString().c_str());
 		}
 
-		apr_file_printf( file, "\t</archetype>\n" );
-		apr_file_printf( file, "\n</linden_genepool>\n" );
+        LLVector3 rp = getRootJoint()->getWorldPosition();
+        LLVector4a rpv;
+        rpv.load3(rp.mV);
+        
+        for (S32 joint_num = 0; joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS; joint_num++)
+        {
+            LLJoint *joint = getJoint(joint_num);
+            if (joint_num < mJointRiggingInfoTab.size())
+            {
+                LLJointRiggingInfo& rig_info = mJointRiggingInfoTab[joint_num];
+                if (rig_info.isRiggedTo())
+                {
+                    LLMatrix4a mat;
+                    LLVector4a new_extents[2];
+                    mat.loadu(joint->getWorldMatrix());
+                    matMulBoundBox(mat, rig_info.getRiggedExtents(), new_extents);
+                    LLVector4a rrp[2];
+                    rrp[0].setSub(new_extents[0],rpv);
+                    rrp[1].setSub(new_extents[1],rpv);
+                    apr_file_printf( file, "\t\t<joint_rig_info num=\"%d\" name=\"%s\" min=\"%f %f %f\" max=\"%f %f %f\" tmin=\"%f %f %f\" tmax=\"%f %f %f\"/>\n", 
+                                     joint_num,
+                                     joint->getName().c_str(),
+                                     rig_info.getRiggedExtents()[0][0],
+                                     rig_info.getRiggedExtents()[0][1],
+                                     rig_info.getRiggedExtents()[0][2],
+                                     rig_info.getRiggedExtents()[1][0],
+                                     rig_info.getRiggedExtents()[1][1],
+                                     rig_info.getRiggedExtents()[1][2],
+                                     rrp[0][0],
+                                     rrp[0][1],
+                                     rrp[0][2],
+                                     rrp[1][0],
+                                     rrp[1][1],
+                                     rrp[1][2] );
+                }
+            }
+        }
 
 		bool ultra_verbose = false;
 		if (isSelf() && ultra_verbose)
@@ -8705,6 +9367,10 @@ void LLVOAvatar::dumpArchetypeXML(const std::string& prefix, bool group_by_weara
 			// show the cloned params inside the wearables as well.
 			gAgentAvatarp->dumpWearableInfo(outfile);
 		}
+
+		apr_file_printf( file, "\t</archetype>\n" );
+		apr_file_printf( file, "\n</linden_genepool>\n" );
+
 		LLSD args;
 		args["PATH"] = fullpath;
 		LLNotificationsUtil::add("AppearanceToXMLSaved", args);
@@ -8836,6 +9502,7 @@ void LLVOAvatar::updateRegion(LLViewerRegion *regionp)
 	LLViewerObject::updateRegion(regionp);
 }
 
+// virtual
 std::string LLVOAvatar::getFullname() const
 {
 	std::string name;
@@ -8882,6 +9549,11 @@ void LLVOAvatar::updateFreezeCounter(S32 counter)
 
 BOOL LLVOAvatar::updateLOD()
 {
+    if (mDrawable.isNull())
+    {
+        return FALSE;
+    }
+    
 	if (isImpostor() && 0 != mDrawable->getNumFaces() && mDrawable->getFace(0)->hasGeometry())
 	{
 		return TRUE;
@@ -8907,11 +9579,156 @@ BOOL LLVOAvatar::updateLOD()
 	return res;
 }
 
-void LLVOAvatar::updateLODRiggedAttachments( void )
+void LLVOAvatar::updateLODRiggedAttachments()
 {
 	updateLOD();
 	rebuildRiggedAttachments();
 }
+
+void showRigInfoTabExtents(LLVOAvatar *avatar, LLJointRiggingInfoTab& tab, S32& count_rigged, S32& count_box)
+{
+    count_rigged = count_box = 0;
+    LLVector4a zero_vec;
+    zero_vec.clear();
+    for (S32 i=0; i<tab.size(); i++)
+    {
+        if (tab[i].isRiggedTo())
+        {
+            count_rigged++;
+            LLJoint *joint = avatar->getJoint(i);
+            LL_DEBUGS("RigSpam") << "joint " << i << " name " << joint->getName() << " box " 
+                                 << tab[i].getRiggedExtents()[0] << ", " << tab[i].getRiggedExtents()[1] << LL_ENDL;
+            if ((!tab[i].getRiggedExtents()[0].equals3(zero_vec)) ||
+                (!tab[i].getRiggedExtents()[1].equals3(zero_vec)))
+            {
+                count_box++;
+            }
+       }
+    }
+}
+
+void LLVOAvatar::getAssociatedVolumes(std::vector<LLVOVolume*>& volumes)
+{
+	for ( LLVOAvatar::attachment_map_t::iterator iter = mAttachmentPoints.begin(); iter != mAttachmentPoints.end(); ++iter )
+	{
+		LLViewerJointAttachment* attachment = iter->second;
+		LLViewerJointAttachment::attachedobjs_vec_t::iterator attach_end = attachment->mAttachedObjects.end();
+		
+		for (LLViewerJointAttachment::attachedobjs_vec_t::iterator attach_iter = attachment->mAttachedObjects.begin();
+			 attach_iter != attach_end; ++attach_iter)
+		{
+			LLViewerObject* attached_object =  *attach_iter;
+            LLVOVolume *volume = dynamic_cast<LLVOVolume*>(attached_object);
+            if (volume)
+            {
+                volumes.push_back(volume);
+                if (volume->isAnimatedObject())
+                {
+                    // For animated object attachment, don't need
+                    // the children. Will just get bounding box
+                    // from the control avatar.
+                    continue;
+                }
+            }
+            LLViewerObject::const_child_list_t& children = attached_object->getChildren();
+            for (LLViewerObject::const_child_list_t::const_iterator it = children.begin();
+                 it != children.end(); ++it)
+            {
+                LLViewerObject *childp = *it;
+                LLVOVolume *volume = dynamic_cast<LLVOVolume*>(childp);
+                if (volume)
+                {
+                    volumes.push_back(volume);
+                }
+            }
+        }
+    }
+
+    LLControlAvatar *control_av = dynamic_cast<LLControlAvatar*>(this);
+    if (control_av)
+    {
+        LLVOVolume *volp = control_av->mRootVolp;
+        if (volp)
+        {
+            volumes.push_back(volp);
+            LLViewerObject::const_child_list_t& children = volp->getChildren();
+            for (LLViewerObject::const_child_list_t::const_iterator it = children.begin();
+                 it != children.end(); ++it)
+            {
+                LLViewerObject *childp = *it;
+                LLVOVolume *volume = dynamic_cast<LLVOVolume*>(childp);
+                if (volume)
+                {
+                    volumes.push_back(volume);
+                }
+            }
+        }
+    }
+}
+
+static LLTrace::BlockTimerStatHandle FTM_AVATAR_RIGGING_INFO_UPDATE("Av Upd Rig Info");
+static LLTrace::BlockTimerStatHandle FTM_AVATAR_RIGGING_KEY_UPDATE("Av Upd Rig Key");
+static LLTrace::BlockTimerStatHandle FTM_AVATAR_RIGGING_AVOL_UPDATE("Av Upd Avol");
+
+// virtual
+void LLVOAvatar::updateRiggingInfo()
+{
+    LL_RECORD_BLOCK_TIME(FTM_AVATAR_RIGGING_INFO_UPDATE);
+
+    LL_DEBUGS("RigSpammish") << getFullname() << " updating rig tab" << LL_ENDL;
+
+    std::vector<LLVOVolume*> volumes;
+
+	{
+		LL_RECORD_BLOCK_TIME(FTM_AVATAR_RIGGING_AVOL_UPDATE);
+		getAssociatedVolumes(volumes);
+	}
+
+	std::map<LLUUID,S32> curr_rigging_info_key;
+	{
+		LL_RECORD_BLOCK_TIME(FTM_AVATAR_RIGGING_KEY_UPDATE);
+		// Get current rigging info key
+		for (std::vector<LLVOVolume*>::iterator it = volumes.begin(); it != volumes.end(); ++it)
+		{
+			LLVOVolume *vol = *it;
+			if (vol->isMesh() && vol->getVolume())
+			{
+				const LLUUID& mesh_id = vol->getVolume()->getParams().getSculptID();
+				S32 max_lod = llmax(vol->getLOD(), vol->mLastRiggingInfoLOD);
+				curr_rigging_info_key[mesh_id] = max_lod;
+			}
+		}
+		
+		// Check for key change, which indicates some change in volume composition or LOD.
+		if (curr_rigging_info_key == mLastRiggingInfoKey)
+		{
+			return;
+		}
+	}
+
+	// Something changed. Update.
+	mLastRiggingInfoKey = curr_rigging_info_key;
+    mJointRiggingInfoTab.clear();
+    for (std::vector<LLVOVolume*>::iterator it = volumes.begin(); it != volumes.end(); ++it)
+    {
+        LLVOVolume *vol = *it;
+        vol->updateRiggingInfo();
+        mJointRiggingInfoTab.merge(vol->mJointRiggingInfoTab);
+    }
+
+    //LL_INFOS() << "done update rig count is " << countRigInfoTab(mJointRiggingInfoTab) << LL_ENDL;
+    LL_DEBUGS("RigSpammish") << getFullname() << " after update rig tab:" << LL_ENDL;
+    S32 joint_count, box_count;
+    showRigInfoTabExtents(this, mJointRiggingInfoTab, joint_count, box_count);
+    LL_DEBUGS("RigSpammish") << "uses " << joint_count << " joints " << " nonzero boxes: " << box_count << LL_ENDL;
+}
+
+// virtual
+void LLVOAvatar::onActiveOverrideMeshesChanged()
+{
+    mJointRiggingInfoTab.setNeedsUpdate(true);
+}
+
 U32 LLVOAvatar::getPartitionType() const
 { 
 	// Avatars merely exist as drawables in the bridge partition
@@ -8922,10 +9739,10 @@ U32 LLVOAvatar::getPartitionType() const
 void LLVOAvatar::updateImpostors()
 {
 	LLViewerCamera::sCurCameraID = LLViewerCamera::CAMERA_WORLD;
-	LLCharacter::sAllowInstancesChange = FALSE;
 
-	for (std::vector<LLCharacter*>::iterator iter = LLCharacter::sInstances.begin();
-		iter != LLCharacter::sInstances.end(); ++iter)
+    std::vector<LLCharacter*> instances_copy = LLCharacter::sInstances;
+	for (std::vector<LLCharacter*>::iterator iter = instances_copy.begin();
+		iter != instances_copy.end(); ++iter)
 	{
 		LLVOAvatar* avatar = (LLVOAvatar*) *iter;
 		if (!avatar->isDead() && avatar->isVisible()
@@ -8941,6 +9758,7 @@ void LLVOAvatar::updateImpostors()
 	LLCharacter::sAllowInstancesChange = TRUE;
 }
 
+// virtual
 BOOL LLVOAvatar::isImpostor()
 {
 	return sUseImpostors && (isVisuallyMuted() || (mUpdatePeriod >= IMPOSTOR_PERIOD)) ? TRUE : FALSE;
@@ -9022,6 +9840,17 @@ void LLVOAvatar::updateImpostorRendering(U32 newMaxNonImpostorsValue)
 
 void LLVOAvatar::idleUpdateRenderComplexity()
 {
+    if (isControlAvatar())
+    {
+        LLControlAvatar *cav = dynamic_cast<LLControlAvatar*>(this);
+        bool is_attachment = cav && cav->mRootVolp && cav->mRootVolp->isAttachment(); // For attached animated objects
+        if (is_attachment)
+        {
+            // ARC for animated object attachments is accounted with the avatar they're attached to.
+            return;
+        }
+    }
+
     // Render Complexity
     calculateUpdateRenderComplexity(); // Update mVisualComplexity if needed	
 
@@ -9069,10 +9898,16 @@ void LLVOAvatar::idleUpdateRenderComplexity()
 		// Visual rank
 		info_line = llformat("%d rank", mVisibilityRank);
 		// Use grey for imposters, white for normal rendering or no impostors
-		info_color.set(isImpostor() ? LLColor4::grey : LLColor4::white);
+		info_color.set(isImpostor() ? LLColor4::grey : (isControlAvatar() ? LLColor4::yellow : LLColor4::white));
 		info_style = LLFontGL::NORMAL;
 		mText->addLine(info_line, info_color, info_style);
 
+        // Triangle count
+        mText->addLine(std::string("VisTris ") + LLStringOps::getReadableNumber(mAttachmentVisibleTriangleCount), 
+                       info_color, info_style);
+        mText->addLine(std::string("EstMaxTris ") + LLStringOps::getReadableNumber(mAttachmentEstTriangleCount), 
+                       info_color, info_style);
+
 		// Attachment Surface Area
 		static LLCachedControl<F32> max_attachment_area(gSavedSettings, "RenderAutoMuteSurfaceAreaLimit", 1000.0f);
 		info_line = llformat("%.0f m^2", mAttachmentSurfaceArea);
@@ -9091,22 +9926,13 @@ void LLVOAvatar::idleUpdateRenderComplexity()
 			info_color.set(LLColor4::grey);
 			info_style = LLFontGL::NORMAL;
 		}
+
 		mText->addLine(info_line, info_color, info_style);
 
 		updateText(); // corrects position
 	}
 }
 
-void LLVOAvatar::addAttachmentArea(F32 delta_area)
-{
-    mAttachmentSurfaceArea   += delta_area;
-}
-
-void LLVOAvatar::subtractAttachmentArea(F32 delta_area)
-{
-    mAttachmentSurfaceArea   = delta_area > mAttachmentSurfaceArea ? 0.0 : mAttachmentSurfaceArea - delta_area;
-}
-
 void LLVOAvatar::updateVisualComplexity()
 {
 	LL_DEBUGS("AvatarRender") << "avatar " << getID() << " appearance changed" << LL_ENDL;
@@ -9114,6 +9940,135 @@ void LLVOAvatar::updateVisualComplexity()
 	mVisualComplexityStale = true;
 }
 
+// Account for the complexity of a single top-level object associated
+// with an avatar. This will be either an attached object or an animated
+// object.
+void LLVOAvatar::accountRenderComplexityForObject(
+    const LLViewerObject *attached_object,
+    const F32 max_attachment_complexity,
+    LLVOVolume::texture_cost_t& textures,
+    U32& cost,
+    hud_complexity_list_t& hud_complexity_list)
+{
+    if (attached_object && !attached_object->isHUDAttachment())
+    {
+        mAttachmentVisibleTriangleCount += attached_object->recursiveGetTriangleCount();
+        mAttachmentEstTriangleCount += attached_object->recursiveGetEstTrianglesMax();
+        mAttachmentSurfaceArea += attached_object->recursiveGetScaledSurfaceArea();
+
+        textures.clear();
+        const LLDrawable* drawable = attached_object->mDrawable;
+        if (drawable)
+        {
+            const LLVOVolume* volume = drawable->getVOVolume();
+            if (volume)
+            {
+                F32 attachment_total_cost = 0;
+                F32 attachment_volume_cost = 0;
+                F32 attachment_texture_cost = 0;
+                F32 attachment_children_cost = 0;
+                const F32 animated_object_attachment_surcharge = 1000;
+
+                if (attached_object->isAnimatedObject())
+                {
+                    attachment_volume_cost += animated_object_attachment_surcharge;
+                }
+                attachment_volume_cost += volume->getRenderCost(textures);
+
+                const_child_list_t children = volume->getChildren();
+                for (const_child_list_t::const_iterator child_iter = children.begin();
+                     child_iter != children.end();
+                     ++child_iter)
+                {
+                    LLViewerObject* child_obj = *child_iter;
+                    LLVOVolume *child = dynamic_cast<LLVOVolume*>( child_obj );
+                    if (child)
+                    {
+                        attachment_children_cost += child->getRenderCost(textures);
+                    }
+                }
+
+                for (LLVOVolume::texture_cost_t::iterator volume_texture = textures.begin();
+                     volume_texture != textures.end();
+                     ++volume_texture)
+                {
+                    // add the cost of each individual texture in the linkset
+                    attachment_texture_cost += volume_texture->second;
+                }
+                attachment_total_cost = attachment_volume_cost + attachment_texture_cost + attachment_children_cost;
+                LL_DEBUGS("ARCdetail") << "Attachment costs " << attached_object->getAttachmentItemID()
+                                       << " total: " << attachment_total_cost
+                                       << ", volume: " << attachment_volume_cost
+                                       << ", textures: " << attachment_texture_cost
+                                       << ", " << volume->numChildren()
+                                       << " children: " << attachment_children_cost
+                                       << LL_ENDL;
+                // Limit attachment complexity to avoid signed integer flipping of the wearer's ACI
+                cost += (U32)llclamp(attachment_total_cost, MIN_ATTACHMENT_COMPLEXITY, max_attachment_complexity);
+            }
+        }
+    }
+    if (isSelf()
+        && attached_object
+        && attached_object->isHUDAttachment()
+        && !attached_object->isTempAttachment()
+        && attached_object->mDrawable)
+    {
+        textures.clear();
+
+        mAttachmentSurfaceArea += attached_object->recursiveGetScaledSurfaceArea();
+
+        const LLVOVolume* volume = attached_object->mDrawable->getVOVolume();
+        if (volume)
+        {
+            LLHUDComplexity hud_object_complexity;
+            hud_object_complexity.objectName = attached_object->getAttachmentItemName();
+            hud_object_complexity.objectId = attached_object->getAttachmentItemID();
+            std::string joint_name;
+            gAgentAvatarp->getAttachedPointName(attached_object->getAttachmentItemID(), joint_name);
+            hud_object_complexity.jointName = joint_name;
+            // get cost and individual textures
+            hud_object_complexity.objectsCost += volume->getRenderCost(textures);
+            hud_object_complexity.objectsCount++;
+
+            LLViewerObject::const_child_list_t& child_list = attached_object->getChildren();
+            for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
+                 iter != child_list.end(); ++iter)
+            {
+                LLViewerObject* childp = *iter;
+                const LLVOVolume* chld_volume = dynamic_cast<LLVOVolume*>(childp);
+                if (chld_volume)
+                {
+                    // get cost and individual textures
+                    hud_object_complexity.objectsCost += chld_volume->getRenderCost(textures);
+                    hud_object_complexity.objectsCount++;
+                }
+            }
+
+            hud_object_complexity.texturesCount += textures.size();
+
+            for (LLVOVolume::texture_cost_t::iterator volume_texture = textures.begin();
+                 volume_texture != textures.end();
+                 ++volume_texture)
+            {
+                // add the cost of each individual texture (ignores duplicates)
+                hud_object_complexity.texturesCost += volume_texture->second;
+                LLViewerFetchedTexture *tex = LLViewerTextureManager::getFetchedTexture(volume_texture->first);
+                if (tex)
+                {
+                    // Note: Texture memory might be incorect since texture might be still loading.
+                    hud_object_complexity.texturesMemoryTotal += tex->getTextureMemory();
+                    if (tex->getOriginalHeight() * tex->getOriginalWidth() >= HUD_OVERSIZED_TEXTURE_DATA_SIZE)
+                    {
+                        hud_object_complexity.largeTexturesCount++;
+                    }
+                }
+            }
+            hud_complexity_list.push_back(hud_object_complexity);
+        }
+    }
+}
+
 // Calculations for mVisualComplexity value
 void LLVOAvatar::calculateUpdateRenderComplexity()
 {
@@ -9152,7 +10107,25 @@ void LLVOAvatar::calculateUpdateRenderComplexity()
 		}
         LL_DEBUGS("ARCdetail") << "Avatar body parts complexity: " << cost << LL_ENDL;
 
+        mAttachmentVisibleTriangleCount = 0;
+        mAttachmentEstTriangleCount = 0.f;
+        mAttachmentSurfaceArea = 0.f;
+        
+        // A standalone animated object needs to be accounted for
+        // using its associated volume. Attached animated objects
+        // will be covered by the subsequent loop over attachments.
+        LLControlAvatar *control_av = dynamic_cast<LLControlAvatar*>(this);
+        if (control_av)
+        {
+            LLVOVolume *volp = control_av->mRootVolp;
+            if (volp && !volp->isAttachment())
+            {
+                accountRenderComplexityForObject(volp, max_attachment_complexity,
+                                                 textures, cost, hud_complexity_list);
+            }
+        }
 
+        // Account for complexity of all attachments.
 		for (attachment_map_t::const_iterator attachment_point = mAttachmentPoints.begin(); 
 			 attachment_point != mAttachmentPoints.end();
 			 ++attachment_point)
@@ -9163,112 +10136,8 @@ void LLVOAvatar::calculateUpdateRenderComplexity()
 				 ++attachment_iter)
 			{
 				const LLViewerObject* attached_object = (*attachment_iter);
-				if (attached_object && !attached_object->isHUDAttachment())
-				{
-					textures.clear();
-					const LLDrawable* drawable = attached_object->mDrawable;
-					if (drawable)
-					{
-						const LLVOVolume* volume = drawable->getVOVolume();
-						if (volume)
-						{
-                            F32 attachment_total_cost = 0;
-                            F32 attachment_volume_cost = 0;
-                            F32 attachment_texture_cost = 0;
-                            F32 attachment_children_cost = 0;
-
-							attachment_volume_cost += volume->getRenderCost(textures);
-
-							const_child_list_t children = volume->getChildren();
-							for (const_child_list_t::const_iterator child_iter = children.begin();
-								  child_iter != children.end();
-								  ++child_iter)
-							{
-								LLViewerObject* child_obj = *child_iter;
-								LLVOVolume *child = dynamic_cast<LLVOVolume*>( child_obj );
-								if (child)
-								{
-									attachment_children_cost += child->getRenderCost(textures);
-								}
-							}
-
-							for (LLVOVolume::texture_cost_t::iterator volume_texture = textures.begin();
-								 volume_texture != textures.end();
-								 ++volume_texture)
-							{
-								// add the cost of each individual texture in the linkset
-								attachment_texture_cost += volume_texture->second;
-							}
-                            attachment_total_cost = attachment_volume_cost + attachment_texture_cost + attachment_children_cost;
-                            LL_DEBUGS("ARCdetail") << "Attachment costs " << attached_object->getAttachmentItemID()
-                                                   << " total: " << attachment_total_cost
-                                                   << ", volume: " << attachment_volume_cost
-                                                   << ", textures: " << attachment_texture_cost
-                                                   << ", " << volume->numChildren()
-                                                   << " children: " << attachment_children_cost
-                                                   << LL_ENDL;
-                            // Limit attachment complexity to avoid signed integer flipping of the wearer's ACI
-                            cost += (U32)llclamp(attachment_total_cost, MIN_ATTACHMENT_COMPLEXITY, max_attachment_complexity);
-						}
-					}
-				}
-                if (isSelf()
-                    && attached_object
-                    && attached_object->isHUDAttachment()
-                    && !attached_object->isTempAttachment()
-                    && attached_object->mDrawable)
-                {
-                    textures.clear();
-
-                    const LLVOVolume* volume = attached_object->mDrawable->getVOVolume();
-                    if (volume)
-                    {
-                        LLHUDComplexity hud_object_complexity;
-                        hud_object_complexity.objectName = attached_object->getAttachmentItemName();
-                        hud_object_complexity.objectId = attached_object->getAttachmentItemID();
-                        std::string joint_name;
-                        gAgentAvatarp->getAttachedPointName(attached_object->getAttachmentItemID(), joint_name);
-                        hud_object_complexity.jointName = joint_name;
-                        // get cost and individual textures
-                        hud_object_complexity.objectsCost += volume->getRenderCost(textures);
-                        hud_object_complexity.objectsCount++;
-
-                        LLViewerObject::const_child_list_t& child_list = attached_object->getChildren();
-                        for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
-                            iter != child_list.end(); ++iter)
-                        {
-                            LLViewerObject* childp = *iter;
-                            const LLVOVolume* chld_volume = dynamic_cast<LLVOVolume*>(childp);
-                            if (chld_volume)
-                            {
-                                // get cost and individual textures
-                                hud_object_complexity.objectsCost += chld_volume->getRenderCost(textures);
-                                hud_object_complexity.objectsCount++;
-                            }
-                        }
-
-                        hud_object_complexity.texturesCount += textures.size();
-
-                        for (LLVOVolume::texture_cost_t::iterator volume_texture = textures.begin();
-                            volume_texture != textures.end();
-                            ++volume_texture)
-                        {
-                            // add the cost of each individual texture (ignores duplicates)
-                            hud_object_complexity.texturesCost += volume_texture->second;
-                            LLViewerFetchedTexture *tex = LLViewerTextureManager::getFetchedTexture(volume_texture->first);
-                            if (tex)
-                            {
-                                // Note: Texture memory might be incorect since texture might be still loading.
-                                hud_object_complexity.texturesMemoryTotal += tex->getTextureMemory();
-                                if (tex->getOriginalHeight() * tex->getOriginalWidth() >= HUD_OVERSIZED_TEXTURE_DATA_SIZE)
-                                {
-                                    hud_object_complexity.largeTexturesCount++;
-                                }
-                            }
-                        }
-                        hud_complexity_list.push_back(hud_object_complexity);
-                    }
-                }
+                accountRenderComplexityForObject(attached_object, max_attachment_complexity,
+                                                 textures, cost, hud_complexity_list);
 			}
 		}
 
diff --git a/indra/newview/llvoavatar.h b/indra/newview/llvoavatar.h
index bd89d4ef23..deb22617a4 100644
--- a/indra/newview/llvoavatar.h
+++ b/indra/newview/llvoavatar.h
@@ -49,7 +49,10 @@
 #include "lldriverparam.h"
 #include "llviewertexlayer.h"
 #include "material_codes.h"		// LL_MCODE_END
+#include "llrigginginfo.h"
 #include "llviewerstats.h"
+#include "llvovolume.h"
+#include "llavatarrendernotifier.h"
 
 extern const LLUUID ANIM_AGENT_BODY_NOISE;
 extern const LLUUID ANIM_AGENT_BREATHE_ROT;
@@ -159,7 +162,7 @@ public:
 	/*virtual*/ void   	 	 	setPixelAreaAndAngle(LLAgent &agent);
 	/*virtual*/ void   	 	 	updateRegion(LLViewerRegion *regionp);
 	/*virtual*/ void   	 	 	updateSpatialExtents(LLVector4a& newMin, LLVector4a &newMax);
-	/*virtual*/ void   	 	 	getSpatialExtents(LLVector4a& newMin, LLVector4a& newMax);
+	void			   	 	 	calculateSpatialExtents(LLVector4a& newMin, LLVector4a& newMax);
 	/*virtual*/ BOOL   	 	 	lineSegmentIntersect(const LLVector4a& start, const LLVector4a& end,
 												 S32 face = -1,                    // which face to check, -1 = ALL_SIDES
 												 BOOL pick_transparent = FALSE,
@@ -169,7 +172,8 @@ public:
 												 LLVector2* tex_coord = NULL,      // return the texture coordinates of the intersection point
 												 LLVector4a* normal = NULL,         // return the surface normal at the intersection point
 												 LLVector4a* tangent = NULL);     // return the surface tangent at the intersection point
-	LLViewerObject*	lineSegmentIntersectRiggedAttachments(const LLVector4a& start, const LLVector4a& end,
+	virtual LLViewerObject*	lineSegmentIntersectRiggedAttachments(
+                                                 const LLVector4a& start, const LLVector4a& end,
 												 S32 face = -1,                    // which face to check, -1 = ALL_SIDES
 												 BOOL pick_transparent = FALSE,
 												 BOOL pick_rigged = FALSE,
@@ -200,18 +204,28 @@ public:
 
 	virtual LLJoint*		getJoint(const std::string &name);
 	LLJoint*		        getJoint(S32 num);
-	
-	void 					addAttachmentOverridesForObject(LLViewerObject *vo);
-	void					resetJointsOnDetach(const LLUUID& mesh_id);
-	void					resetJointsOnDetach(LLViewerObject *vo);
-    bool					jointIsRiggedTo(const std::string& joint_name);
-    bool					jointIsRiggedTo(const std::string& joint_name, const LLViewerObject *vo);
+
+	void 					addAttachmentOverridesForObject(LLViewerObject *vo, std::set<LLUUID>* meshes_seen = NULL, bool recursive = true);
+	void					removeAttachmentOverridesForObject(const LLUUID& mesh_id);
+	void					removeAttachmentOverridesForObject(LLViewerObject *vo);
+    bool					jointIsRiggedTo(const LLJoint *joint) const;
 	void					clearAttachmentOverrides();
 	void					rebuildAttachmentOverrides();
+    void					updateAttachmentOverrides();
     void                    showAttachmentOverrides(bool verbose = false) const;
     void                    getAttachmentOverrideNames(std::set<std::string>& pos_names, 
                                                        std::set<std::string>& scale_names) const;
+
+    void 					getAssociatedVolumes(std::vector<LLVOVolume*>& volumes);
+
+    // virtual
+    void 					updateRiggingInfo();
+	// This encodes mesh id and LOD, so we can see whether display is up-to-date.
+	std::map<LLUUID,S32>	mLastRiggingInfoKey;
 	
+    std::set<LLUUID>		mActiveOverrideMeshes;
+    virtual void			onActiveOverrideMeshesChanged();
+    
 	/*virtual*/ const LLUUID&	getID() const;
 	/*virtual*/ void			addDebugText(const std::string& text);
 	/*virtual*/ F32				getTimeDilation();
@@ -233,6 +247,9 @@ public:
 public:
 	virtual bool 	isSelf() const { return false; } // True if this avatar is for this viewer's agent
 
+	virtual bool 	isControlAvatar() const { return mIsControlAvatar; } // True if this avatar is a control av (no associated user)
+	virtual bool 	isUIAvatar() const { return mIsUIAvatar; } // True if this avatar is a supplemental av used in some UI views (no associated user)
+
 private: //aligned members
 	LL_ALIGN_16(LLVector4a	mImpostorExtents[2]);
 
@@ -240,8 +257,16 @@ private: //aligned members
 	// Updates
 	//--------------------------------------------------------------------
 public:
-	void			updateDebugText();
+    void			updateAppearanceMessageDebugText();
+	void 			updateAnimationDebugText();
+	virtual void	updateDebugText();
 	virtual BOOL 	updateCharacter(LLAgent &agent);
+    void			updateFootstepSounds();
+    void			computeUpdatePeriod();
+    void			updateOrientation(LLAgent &agent, F32 speed, F32 delta_time);
+    void			updateTimeStep();
+    void			updateRootPositionAndRotation(LLAgent &agent, F32 speed, bool was_sit_ground_constrained);
+    
 	void 			idleUpdateVoiceVisualizer(bool voice_enabled);
 	void 			idleUpdateMisc(bool detailed_update);
 	virtual void	idleUpdateAppearanceAnimation();
@@ -259,14 +284,17 @@ public:
 	static void		invalidateNameTags();
 	void			addNameTagLine(const std::string& line, const LLColor4& color, S32 style, const LLFontGL* font);
 	void 			idleUpdateRenderComplexity();
+    void 			accountRenderComplexityForObject(const LLViewerObject *attached_object,
+                                                     const F32 max_attachment_complexity,
+                                                     LLVOVolume::texture_cost_t& textures,
+                                                     U32& cost,
+                                                     hud_complexity_list_t& hud_complexity_list);
 	void			calculateUpdateRenderComplexity();
 	static const U32 VISUAL_COMPLEXITY_UNKNOWN;
 	void			updateVisualComplexity();
 	
 	U32				getVisualComplexity()			{ return mVisualComplexity;				};		// Numbers calculated here by rendering AV
 	F32				getAttachmentSurfaceArea()		{ return mAttachmentSurfaceArea;		};		// estimated surface area of attachments
-    void            addAttachmentArea(F32 delta_area);
-    void            subtractAttachmentArea(F32 delta_area);
 
 	U32				getReportedVisualComplexity()					{ return mReportedVisualComplexity;				};	// Numbers as reported by the SL server
 	void			setReportedVisualComplexity(U32 value)			{ mReportedVisualComplexity = value;			};
@@ -422,6 +450,8 @@ public:
         
   private:
 	F32			mAttachmentSurfaceArea; //estimated surface area of attachments
+    U32			mAttachmentVisibleTriangleCount;
+    F32			mAttachmentEstTriangleCount;
 	bool		shouldAlphaMask();
 
 	BOOL 		mNeedsSkin; // avatar has been animated and verts have not been updated
@@ -441,6 +471,14 @@ public:
 	VisualMuteSettings		mVisuallyMuteSetting;			// Always or never visually mute this AV
 
 	//--------------------------------------------------------------------
+	// animated object status
+	//--------------------------------------------------------------------
+public:
+    bool mIsControlAvatar;
+    bool mIsUIAvatar;
+    bool mEnableDefaultMotions;
+
+	//--------------------------------------------------------------------
 	// Morph masks
 	//--------------------------------------------------------------------
 public:
@@ -478,7 +516,7 @@ private:
 	// Impostors
 	//--------------------------------------------------------------------
 public:
-	BOOL 		isImpostor();
+	virtual BOOL isImpostor();
 	BOOL 		shouldImpostor(const U32 rank_factor = 1) const;
 	BOOL 	    needsImpostorUpdate() const;
 	const LLVector3& getImpostorOffset() const;
@@ -490,14 +528,22 @@ public:
 	static void updateImpostors();
 	LLRenderTarget mImpostor;
 	BOOL		mNeedsImpostorUpdate;
+	F32SecondsImplicit mLastImpostorUpdateFrameTime;
+    const LLVector3*  getLastAnimExtents() const { return mLastAnimExtents; }
+	void		setNeedsExtentUpdate(bool val) { mNeedsExtentUpdate = val; }
+
 private:
 	LLVector3	mImpostorOffset;
 	LLVector2	mImpostorDim;
+    // This becomes true in the constructor and false after the first
+    // idleUpdateMisc(). Not clear it serves any purpose.
 	BOOL		mNeedsAnimUpdate;
+    bool		mNeedsExtentUpdate;
 	LLVector3	mImpostorAngle;
 	F32			mImpostorDistance;
 	F32			mImpostorPixelArea;
 	LLVector3	mLastAnimExtents[2];  
+	LLVector3	mLastAnimBasePos;
 	
 	LLCachedControl<bool> mRenderUnloadedAvatar;
 
@@ -716,7 +762,9 @@ private:
 	//--------------------------------------------------------------------
 public:
 	BOOL			isVisible() const;
+    virtual bool    shouldRenderRigged() const;
 	void			setVisibilityRank(U32 rank);
+    U32				getVisibilityRank() const { return mVisibilityRank; }
 	static S32 		sNumVisibleAvatars; // Number of instances of this class
 /**                    Appearance
  **                                                                            **
@@ -739,9 +787,9 @@ public:
 	static LLVOAvatar*  findAvatarFromAttachment(LLViewerObject* obj);
 	/*virtual*/ BOOL	isWearingWearableType(LLWearableType::EType type ) const;
 	LLViewerObject *	findAttachmentByID( const LLUUID & target_id ) const;
+	LLViewerJointAttachment* getTargetAttachmentPoint(LLViewerObject* viewer_object);
 
 protected:
-	LLViewerJointAttachment* getTargetAttachmentPoint(LLViewerObject* viewer_object);
 	void 				lazyAttach();
 	void				rebuildRiggedAttachments( void );
 
@@ -761,10 +809,12 @@ public:
 	BOOL 				hasHUDAttachment() const;
 	LLBBox 				getHUDBBox() const;
 	void 				resetHUDAttachments();
-	BOOL				canAttachMoreObjects() const;
-	BOOL				canAttachMoreObjects(U32 n) const;
+	BOOL				canAttachMoreObjects(U32 n=1) const;
+    S32					getMaxAnimatedObjectAttachments() const;
+    BOOL				canAttachMoreAnimatedObjects(U32 n=1) const;
 protected:
 	U32					getNumAttachments() const; // O(N), not O(1)
+	U32					getNumAnimatedObjectAttachments() const; // O(N), not O(1)
 
 /**                    Wearables
  **                                                                            **
@@ -897,7 +947,7 @@ private:
  **/
 
 public:
-	std::string		getFullname() const; // Returns "FirstName LastName"
+	virtual std::string	getFullname() const; // Returns "FirstName LastName"
 	std::string		avString() const; // Frequently used string in log messages "Avatar '<full name'"
 protected:
 	static void		getAnimLabels(std::vector<std::string>* labels);
diff --git a/indra/newview/llvoavatarself.cpp b/indra/newview/llvoavatarself.cpp
index b2954f4de2..dcaade55a6 100644
--- a/indra/newview/llvoavatarself.cpp
+++ b/indra/newview/llvoavatarself.cpp
@@ -235,6 +235,8 @@ void LLVOAvatarSelf::initInstance()
 	//doPeriodically(output_self_av_texture_diagnostics, 30.0);
 	doPeriodically(update_avatar_rez_metrics, 5.0);
 	doPeriodically(boost::bind(&LLVOAvatarSelf::checkStuckAppearance, this), 30.0);
+
+    mInitFlags |= 1<<2;
 }
 
 void LLVOAvatarSelf::setHoverIfRegionEnabled()
@@ -2699,6 +2701,12 @@ void LLVOAvatarSelf::onCustomizeEnd(bool disable_camera_switch)
 	}
 }
 
+// virtual
+bool LLVOAvatarSelf::shouldRenderRigged() const
+{
+    return gAgent.needsRenderAvatar(); 
+}
+
 // HACK: this will null out the avatar's local texture IDs before the TE message is sent
 //       to ensure local texture IDs are not sent to other clients in the area.
 //       this is a short-term solution. The long term solution will be to not set the texture
@@ -2793,7 +2801,7 @@ BOOL LLVOAvatarSelf::needsRenderBeam()
 		// don't render selection beam on hud objects
 		is_touching_or_grabbing = FALSE;
 	}
-	return is_touching_or_grabbing || (mState & AGENT_STATE_EDITING && LLSelectMgr::getInstance()->shouldShowSelection());
+	return is_touching_or_grabbing || (getAttachmentState() & AGENT_STATE_EDITING && LLSelectMgr::getInstance()->shouldShowSelection());
 }
 
 // static
diff --git a/indra/newview/llvoavatarself.h b/indra/newview/llvoavatarself.h
index f9f90bb323..b0fdae9bf0 100644
--- a/indra/newview/llvoavatarself.h
+++ b/indra/newview/llvoavatarself.h
@@ -312,6 +312,9 @@ public:
 	//--------------------------------------------------------------------
 	// Visibility
 	//--------------------------------------------------------------------
+
+    /* virtual */ bool shouldRenderRigged() const;
+    
 public:
 	bool			sendAppearanceMessage(LLMessageSystem *mesgsys) const;
 
diff --git a/indra/newview/llvograss.cpp b/indra/newview/llvograss.cpp
index b5c90a8f60..d651d540b9 100644
--- a/indra/newview/llvograss.cpp
+++ b/indra/newview/llvograss.cpp
@@ -92,7 +92,7 @@ LLVOGrass::~LLVOGrass()
 
 void LLVOGrass::updateSpecies()
 {
-	mSpecies = mState;
+	mSpecies = getAttachmentState();
 	
 	if (!sSpeciesTable.count(mSpecies))
 	{
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index e746ecd87a..24726e61e8 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -76,8 +76,14 @@
 #include "lldatapacker.h"
 #include "llviewershadermgr.h"
 #include "llvoavatar.h"
+#include "llcontrolavatar.h"
+#include "llvoavatarself.h"
 #include "llvocache.h"
 #include "llmaterialmgr.h"
+#include "llanimationstates.h"
+#include "llinventorytype.h"
+#include "llviewerinventory.h"
+#include "llcallstack.h"
 #include "llsculptidsize.h"
 
 const F32 FORCE_SIMPLE_RENDER_AREA = 512.f;
@@ -213,6 +219,9 @@ LLVOVolume::LLVOVolume(const LLUUID &id, const LLPCode pcode, LLViewerRegion *re
 
 	mFaceMappingChanged = FALSE;
 	mLOD = MIN_LOD;
+    mLODDistance = 0.0f;
+    mLODAdjustedDistance = 0.0f;
+    mLODRadius = 0.0f;
 	mTextureAnimp = NULL;
 	mVolumeChanged = FALSE;
 	mVObjRadius = LLVector3(1,1,0.5f).length();
@@ -225,6 +234,7 @@ LLVOVolume::LLVOVolume(const LLUUID &id, const LLPCode pcode, LLViewerRegion *re
 	mLastFetchedMediaVersion = -1;
 	memset(&mIndexInTex, 0, sizeof(S32) * LLRender::NUM_VOLUME_TEXTURE_CHANNELS);
 	mMDCImplCount = 0;
+    mLastRiggingInfoLOD = -1;
 }
 
 LLVOVolume::~LLVOVolume()
@@ -310,6 +320,7 @@ U32 LLVOVolume::processUpdateMessage(LLMessageSystem *mesgsys,
 										  U32 block_num, EObjectUpdateType update_type,
 										  LLDataPacker *dp)
 {
+	 	
 	LLColor4U color;
 	const S32 teDirtyBits = (TEM_CHANGE_TEXTURE|TEM_CHANGE_COLOR|TEM_CHANGE_MEDIA);
 
@@ -323,6 +334,9 @@ U32 LLVOVolume::processUpdateMessage(LLMessageSystem *mesgsys,
 		LLSculptParams *sculpt_params = (LLSculptParams *)getParameterEntry(LLNetworkData::PARAMS_SCULPT);
 		sculpt_id = sculpt_params->getSculptTexture();
 		sculpt_type = sculpt_params->getSculptType();
+
+        LL_DEBUGS("ObjectUpdate") << "uuid " << mID << " set sculpt_id " << sculpt_id << LL_ENDL;
+        dumpStack("ObjectUpdateStack");
 	}
 
 	if (!dp)
@@ -1106,16 +1120,34 @@ void LLVOVolume::updateSculptTexture()
 	
 }
 
+void LLVOVolume::updateVisualComplexity()
+{
+    LLVOAvatar* avatar = getAvatarAncestor();
+    if (avatar)
+    {
+        avatar->updateVisualComplexity();
+    }
+    LLVOAvatar* rigged_avatar = getAvatar();
+    if(rigged_avatar && (rigged_avatar != avatar))
+    {
+        rigged_avatar->updateVisualComplexity();
+    }
+}
+
 void LLVOVolume::notifyMeshLoaded()
 { 
 	mSculptChanged = TRUE;
 	gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_GEOMETRY, TRUE);
 
-	LLVOAvatar* avatar = getAvatar();
-	if (avatar)
-	{
-		avatar->updateVisualComplexity();
-	}
+    if (getAvatar() && !isAnimatedObject())
+    {
+        getAvatar()->addAttachmentOverridesForObject(this);
+    }
+    if (getControlAvatar() && isAnimatedObject())
+    {
+        getControlAvatar()->addAttachmentOverridesForObject(this);
+    }
+    updateVisualComplexity();
 }
 
 // sculpt replaces generate() for sculpted surfaces
@@ -1240,6 +1272,46 @@ S32	LLVOVolume::computeLODDetail(F32 distance, F32 radius, F32 lod_factor)
 	return cur_detail;
 }
 
+std::string get_debug_object_lod_text(LLVOVolume *rootp)
+{
+    std::string cam_dist_string = "";
+    cam_dist_string += LLStringOps::getReadableNumber(rootp->mLODDistance) +  " ";
+    std::string lod_string = llformat("%d",rootp->getLOD());
+    F32 lod_radius = rootp->mLODRadius;
+    S32 cam_dist_count = 0;
+    LLViewerObject::const_child_list_t& child_list = rootp->getChildren();
+    for (LLViewerObject::const_child_list_t::const_iterator iter = child_list.begin();
+         iter != child_list.end(); ++iter)
+    {
+        LLViewerObject *childp = *iter;
+        LLVOVolume *volp = dynamic_cast<LLVOVolume*>(childp);
+        if (volp)
+        {
+            lod_string += llformat("%d",volp->getLOD());
+            if (volp->isRiggedMesh())
+            {
+                // Rigged/animatable mesh. This is computed from the
+                // avatar dynamic box, so value from any vol will be
+                // the same.
+                lod_radius = volp->mLODRadius;
+            }
+            if (volp->mDrawable)
+            {
+                if (cam_dist_count < 4)
+                {
+                    cam_dist_string += LLStringOps::getReadableNumber(volp->mLODDistance) +  " ";
+                    cam_dist_count++;
+                }
+            }
+        }
+    }
+    std::string result = llformat("lod_radius %s dists %s lods %s",
+                                  LLStringOps::getReadableNumber(lod_radius).c_str(),
+                                  cam_dist_string.c_str(),
+                                  lod_string.c_str());
+    return result;
+}
+
 BOOL LLVOVolume::calcLOD()
 {
 	if (mDrawable.isNull())
@@ -1264,18 +1336,60 @@ BOOL LLVOVolume::calcLOD()
 		}
 
 		distance = avatar->mDrawable->mDistanceWRTCamera;
-		radius = avatar->getBinRadius();
+
+
+        if (avatar->isControlAvatar())
+        {
+            // MAINT-7926 Handle volumes in an animated object as a special case
+            const LLVector3* box = avatar->getLastAnimExtents();
+            LLVector3 diag = box[1] - box[0];
+            radius = diag.magVec() * 0.5f;
+            LL_DEBUGS("DynamicBox") << avatar->getFullname() << " diag " << diag << " radius " << radius << LL_ENDL;
+        }
+        else
+        {
+            // Volume in a rigged mesh attached to a regular avatar.
+            // Note this isn't really a radius, so distance calcs are off by factor of 2
+            //radius = avatar->getBinRadius();
+            // SL-937: add dynamic box handling for rigged mesh on regular avatars.
+            const LLVector3* box = avatar->getLastAnimExtents();
+            LLVector3 diag = box[1] - box[0];
+            radius = diag.magVec(); // preserve old BinRadius behavior - 2x off
+            LL_DEBUGS("DynamicBox") << avatar->getFullname() << " diag " << diag << " radius " << radius << LL_ENDL;
+        }
+        if (distance <= 0.f || radius <= 0.f)
+        {
+            LL_DEBUGS("DynamicBox","CalcLOD") << "avatar distance/radius uninitialized, skipping" << LL_ENDL;
+            return FALSE;
+        }
 	}
 	else
 	{
 		distance = mDrawable->mDistanceWRTCamera;
 		radius = getVolume() ? getVolume()->mLODScaleBias.scaledVec(getScale()).length() : getScale().length();
+        if (distance <= 0.f || radius <= 0.f)
+        {
+            LL_DEBUGS("DynamicBox","CalcLOD") << "non-avatar distance/radius uninitialized, skipping" << LL_ENDL;
+            return FALSE;
+        }
 	}
 	
 	//hold onto unmodified distance for debugging
 	//F32 debug_distance = distance;
-	
-	distance *= sDistanceFactor;
+
+    mLODDistance = distance;
+    mLODRadius = radius;
+
+    if (gSavedSettings.getBOOL("DebugObjectLODs"))
+    {
+        if (getAvatar() && isRootEdit())
+        {
+            std::string debug_object_text = get_debug_object_lod_text(this);
+            setDebugText(debug_object_text);
+        }
+    }
+
+    distance *= sDistanceFactor;
 
 	F32 rampDist = LLVOVolume::sLODFactor * 2;
 	
@@ -1296,24 +1410,47 @@ BOOL LLVOVolume::calcLOD()
 		lod_factor *= DEFAULT_FIELD_OF_VIEW / LLViewerCamera::getInstance()->getDefaultFOV();
 	}
 
-	cur_detail = computeLODDetail(ll_round(distance, 0.01f), 
-									ll_round(radius, 0.01f),
-									lod_factor);
+    mLODAdjustedDistance = distance;
 
+    if (isHUDAttachment())
+    {
+        // HUDs always show at highest detail
+        cur_detail = 3;
+    }
+    else
+    {
+        cur_detail = computeLODDetail(ll_round(distance, 0.01f), ll_round(radius, 0.01f), lod_factor);
+    }
+
+    if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_TRIANGLE_COUNT) && mDrawable->getFace(0))
+    {
+        if (isRootEdit())
+        {
+            S32 total_tris = recursiveGetTriangleCount();
+            S32 est_max_tris = recursiveGetEstTrianglesMax();
+            setDebugText(llformat("TRIS SHOWN %d EST %d", total_tris, est_max_tris));
+        }
+    }
 	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_LOD_INFO) &&
 		mDrawable->getFace(0))
 	{
-		//setDebugText(llformat("%.2f:%.2f, %d", mDrawable->mDistanceWRTCamera, radius, cur_detail));
-
-		setDebugText(llformat("%d", mDrawable->getFace(0)->getTextureIndex()));
+        // This is a debug display for LODs. Please don't put the texture index here.
+        setDebugText(llformat("%d", cur_detail));
 	}
 
 	if (cur_detail != mLOD)
 	{
+        LL_DEBUGS("DynamicBox","CalcLOD") << "new LOD " << cur_detail << " change from " << mLOD 
+                             << " distance " << distance << " radius " << radius << " rampDist " << rampDist
+                             << " drawable rigged? " << (mDrawable ? (S32) mDrawable->isState(LLDrawable::RIGGED) : (S32) -1)
+							 << " mRiggedVolume " << (void*)getRiggedVolume()
+                             << " distanceWRTCamera " << (mDrawable ? mDrawable->mDistanceWRTCamera : -1.f)
+                             << LL_ENDL;
+        
 		mAppAngle = ll_round((F32) atan2( mDrawable->getRadius(), mDrawable->mDistanceWRTCamera) * RAD_TO_DEG, 0.01f);
-		mLOD = cur_detail;
+		mLOD = cur_detail;		
 
-		return TRUE;
+        return TRUE;
 	}
 
 	return FALSE;
@@ -1339,6 +1476,16 @@ BOOL LLVOVolume::updateLOD()
 
 	if (lod_changed)
 	{
+        if (debugLoggingEnabled("AnimatedObjectsLinkset"))
+        {
+            if (isAnimatedObject() && isRiggedMesh())
+            {
+                std::string vobj_name = llformat("Vol%p", this);
+                F32 est_tris = getEstTrianglesMax();
+                LL_DEBUGS("AnimatedObjectsLinkset") << vobj_name << " updateLOD to " << getLOD() << ", tris " << est_tris << LL_ENDL; 
+            }
+        }
+
 		gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, FALSE);
 		mLODChanged = TRUE;
 	}
@@ -1413,7 +1560,8 @@ void LLVOVolume::updateFaceFlags()
 BOOL LLVOVolume::setParent(LLViewerObject* parent)
 {
 	BOOL ret = FALSE ;
-	if (parent != getParent())
+    LLViewerObject *old_parent = (LLViewerObject*) getParent();
+	if (parent != old_parent)
 	{
 		ret = LLViewerObject::setParent(parent);
 		if (ret && mDrawable)
@@ -1421,6 +1569,7 @@ BOOL LLVOVolume::setParent(LLViewerObject* parent)
 			gPipeline.markMoved(mDrawable);
 			gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, TRUE);
 		}
+        onReparent(old_parent, parent);
 	}
 
 	return ret ;
@@ -1485,14 +1634,29 @@ BOOL LLVOVolume::genBBoxes(BOOL force_global)
 
 	BOOL rebuild = mDrawable->isState(LLDrawable::REBUILD_VOLUME | LLDrawable::REBUILD_POSITION | LLDrawable::REBUILD_RIGGED);
 
-	//	bool rigged = false;
+    if (getRiggedVolume())
+    {
+        // MAINT-8264 - better to use the existing call in calling
+        // func LLVOVolume::updateGeometry() if we can detect when
+        // updates needed, set REBUILD_RIGGED accordingly.
+
+        // Without the flag, this will remove unused rigged volumes, which we are not currently very aggressive about.
+        updateRiggedVolume();
+    }
+    
 	LLVolume* volume = mRiggedVolume;
 	if (!volume)
 	{
 		volume = getVolume();
 	}
 
-	// There's no guarantee that getVolume()->getNumFaces() == mDrawable->getNumFaces()
+    bool any_valid_boxes = false;
+    
+    if (getRiggedVolume())
+    {
+        LL_DEBUGS("RiggedBox") << "rebuilding box, volume face count " << getVolume()->getNumVolumeFaces() << " drawable face count " << mDrawable->getNumFaces() << LL_ENDL;
+    }
+    // There's no guarantee that getVolume()->getNumFaces() == mDrawable->getNumFaces()
 	for (S32 i = 0;
 		 i < getVolume()->getNumVolumeFaces() && i < mDrawable->getNumFaces() && i < getNumTEs();
 		 i++)
@@ -1502,15 +1666,28 @@ BOOL LLVOVolume::genBBoxes(BOOL force_global)
 		{
 			continue;
 		}
-		res &= face->genVolumeBBoxes(*volume, i,
-										mRelativeXform, 
-										(mVolumeImpl && mVolumeImpl->isVolumeGlobal()) || force_global);
+
+        BOOL face_res = face->genVolumeBBoxes(*volume, i,
+                                              mRelativeXform, 
+                                              (mVolumeImpl && mVolumeImpl->isVolumeGlobal()) || force_global);
+        res &= face_res; // note that this result is never used
+		
+        // MAINT-8264 - ignore bboxes of ill-formed faces.
+        if (!face_res)
+        {
+            continue;
+        }
 		if (rebuild)
 		{
-			if (i == 0)
+            if (getRiggedVolume())
+            {
+                LL_DEBUGS("RiggedBox") << "rebuilding box, face " << i << " extents " << face->mExtents[0] << ", " << face->mExtents[1] << LL_ENDL;
+            }
+			if (!any_valid_boxes)
 			{
 				min = face->mExtents[0];
 				max = face->mExtents[1];
+                any_valid_boxes = true;
 			}
 			else
 			{
@@ -1519,17 +1696,28 @@ BOOL LLVOVolume::genBBoxes(BOOL force_global)
 			}
 		}
 	}
-	
-	if (rebuild)
-	{
-		mDrawable->setSpatialExtents(min,max);
-		min.add(max);
-		min.mul(0.5f);
-		mDrawable->setPositionGroup(min);	
-	}
 
-	updateRadius();
-	mDrawable->movePartition();
+    if (any_valid_boxes)
+    {
+        if (rebuild)
+        {
+            if (getRiggedVolume())
+            {
+                LL_DEBUGS("RiggedBox") << "rebuilding got extents " << min << ", " << max << LL_ENDL;
+            }
+            mDrawable->setSpatialExtents(min,max);
+            min.add(max);
+            min.mul(0.5f);
+            mDrawable->setPositionGroup(min);	
+        }
+
+        updateRadius();
+        mDrawable->movePartition();
+    }
+    else
+    {
+        LL_DEBUGS("RiggedBox") << "genBBoxes failed to find any valid face boxes" << LL_ENDL;
+    }
 				
 	return res;
 }
@@ -1677,6 +1865,11 @@ bool LLVOVolume::lodOrSculptChanged(LLDrawable *drawable, BOOL &compiled)
 
 	if ((new_lod != old_lod) || mSculptChanged)
 	{
+        if (mDrawable->isState(LLDrawable::RIGGED))
+        {
+            updateVisualComplexity();
+        }
+
 		compiled = TRUE;
 		sNumLODChanges += new_num_faces;
 
@@ -3317,6 +3510,208 @@ BOOL LLVOVolume::setIsFlexible(BOOL is_flexible)
 	return res;
 }
 
+const LLMeshSkinInfo* LLVOVolume::getSkinInfo() const
+{
+    if (getVolume())
+    {
+        return gMeshRepo.getSkinInfo(getVolume()->getParams().getSculptID(), this);
+    }
+    else
+    {
+        return NULL;
+    }
+}
+
+// virtual
+BOOL LLVOVolume::isRiggedMesh() const
+{
+    return isMesh() && getSkinInfo();
+}
+
+//----------------------------------------------------------------------------
+U32 LLVOVolume::getExtendedMeshFlags() const
+{
+	const LLExtendedMeshParams *param_block = 
+        (const LLExtendedMeshParams *)getParameterEntry(LLNetworkData::PARAMS_EXTENDED_MESH);
+	if (param_block)
+	{
+		return param_block->getFlags();
+	}
+	else
+	{
+		return 0;
+	}
+}
+
+void LLVOVolume::onSetExtendedMeshFlags(U32 flags)
+{
+
+    // The isAnySelected() check was needed at one point to prevent
+    // graphics problems. These are now believed to be fixed so the
+    // check has been disabled.
+	if (/*!getRootEdit()->isAnySelected() &&*/ mDrawable.notNull())
+    {
+        // Need to trigger rebuildGeom(), which is where control avatars get created/removed
+        getRootEdit()->recursiveMarkForUpdate(TRUE);
+    }
+    if (isAttachment() && getAvatarAncestor())
+    {
+        updateVisualComplexity();
+        if (flags & LLExtendedMeshParams::ANIMATED_MESH_ENABLED_FLAG)
+        {
+            // Making a rigged mesh into an animated object
+            getAvatarAncestor()->updateAttachmentOverrides();
+        }
+        else
+        {
+            // Making an animated object into a rigged mesh
+            getAvatarAncestor()->updateAttachmentOverrides();
+        }
+    }
+}
+
+void LLVOVolume::setExtendedMeshFlags(U32 flags)
+{
+    U32 curr_flags = getExtendedMeshFlags();
+    if (curr_flags != flags)
+    {
+        bool in_use = true;
+        setParameterEntryInUse(LLNetworkData::PARAMS_EXTENDED_MESH, in_use, true);
+        LLExtendedMeshParams *param_block = 
+            (LLExtendedMeshParams *)getParameterEntry(LLNetworkData::PARAMS_EXTENDED_MESH);
+        if (param_block)
+        {
+            param_block->setFlags(flags);
+        }
+        parameterChanged(LLNetworkData::PARAMS_EXTENDED_MESH, true);
+        LL_DEBUGS("AnimatedObjects") << this
+                                     << " new flags " << flags << " curr_flags " << curr_flags
+                                     << ", calling onSetExtendedMeshFlags()"
+                                     << LL_ENDL;
+        onSetExtendedMeshFlags(flags);
+    }
+}
+
+bool LLVOVolume::canBeAnimatedObject() const
+{
+    F32 est_tris = recursiveGetEstTrianglesMax();
+    if (est_tris < 0 || est_tris > getAnimatedObjectMaxTris())
+    {
+        return false;
+    }
+    return true;
+}
+
+bool LLVOVolume::isAnimatedObject() const
+{
+    LLVOVolume *root_vol = (LLVOVolume*)getRootEdit();
+    bool root_is_animated_flag = root_vol->getExtendedMeshFlags() & LLExtendedMeshParams::ANIMATED_MESH_ENABLED_FLAG;
+    return root_is_animated_flag;
+}
+
+// Called any time parenting changes for a volume. Update flags and
+// control av accordingly.  This is called after parent has been
+// changed to new_parent, but before new_parent's mChildList has changed.
+
+// virtual
+void LLVOVolume::onReparent(LLViewerObject *old_parent, LLViewerObject *new_parent)
+{
+    LLVOVolume *old_volp = dynamic_cast<LLVOVolume*>(old_parent);
+
+    if (new_parent && !new_parent->isAvatar())
+    {
+        if (mControlAvatar.notNull())
+        {
+            // Here an animated object is being made the child of some
+            // other prim. Should remove the control av from the child.
+            LLControlAvatar *av = mControlAvatar;
+            mControlAvatar = NULL;
+            av->markForDeath();
+        }
+    }
+    if (old_volp && old_volp->isAnimatedObject())
+    {
+        if (old_volp->getControlAvatar())
+        {
+            // We have been removed from an animated object, need to do cleanup.
+            old_volp->getControlAvatar()->updateAttachmentOverrides();
+            old_volp->getControlAvatar()->updateAnimations();
+        }
+    }
+}
+
+// This needs to be called after onReparent(), because mChildList is
+// not updated until the end of LLViewerObject::addChild()
+
+// virtual
+void LLVOVolume::afterReparent()
+{
+    {
+        LL_DEBUGS("AnimatedObjects") << "new child added for parent " 
+            << ((LLViewerObject*)getParent())->getID() << LL_ENDL;
+    }
+                                                                                             
+    if (isAnimatedObject() && getControlAvatar())
+    {
+        LL_DEBUGS("AnimatedObjects") << "adding attachment overrides, parent is animated object " 
+            << ((LLViewerObject*)getParent())->getID() << LL_ENDL;
+
+        // MAINT-8239 - doing a full rebuild whenever parent is set
+        // makes the joint overrides load more robustly. In theory,
+        // addAttachmentOverrides should be sufficient, but in
+        // practice doing a full rebuild helps compensate for
+        // notifyMeshLoaded() not being called reliably enough.
+        
+        // was: getControlAvatar()->addAttachmentOverridesForObject(this);
+        //getControlAvatar()->rebuildAttachmentOverrides();
+        getControlAvatar()->updateAnimations();
+    }
+    else
+    {
+        LL_DEBUGS("AnimatedObjects") << "not adding overrides, parent: " 
+                                     << ((LLViewerObject*)getParent())->getID() 
+                                     << " isAnimated: "  << isAnimatedObject() << " cav "
+                                     << getControlAvatar() << LL_ENDL;
+    }
+}
+
+//----------------------------------------------------------------------------
+static LLTrace::BlockTimerStatHandle FTM_VOVOL_RIGGING_INFO("VOVol Rigging Info");
+
+void LLVOVolume::updateRiggingInfo()
+{
+    LL_RECORD_BLOCK_TIME(FTM_VOVOL_RIGGING_INFO);
+    if (isRiggedMesh())
+    {
+        const LLMeshSkinInfo* skin = getSkinInfo();
+        LLVOAvatar *avatar = getAvatar();
+        LLVolume *volume = getVolume();
+        if (skin && avatar && volume)
+        {
+            LL_DEBUGS("RigSpammish") << "starting, vovol " << this << " lod " << getLOD() << " last " << mLastRiggingInfoLOD << LL_ENDL;
+            if (getLOD()>mLastRiggingInfoLOD || getLOD()==3)
+            {
+                // Rigging info may need update
+                mJointRiggingInfoTab.clear();
+                for (S32 f = 0; f < volume->getNumVolumeFaces(); ++f)
+                {
+                    LLVolumeFace& vol_face = volume->getVolumeFace(f);
+                    LLSkinningUtil::updateRiggingInfo(skin, avatar, vol_face);
+                    if (vol_face.mJointRiggingInfoTab.size()>0)
+                    {
+                        mJointRiggingInfoTab.merge(vol_face.mJointRiggingInfoTab);
+                    }
+                }
+                // Keep the highest LOD info available.
+                mLastRiggingInfoLOD = getLOD();
+                LL_DEBUGS("RigSpammish") << "updated rigging info for LLVOVolume " 
+                                         << this << " lod " << mLastRiggingInfoLOD 
+                                         << LL_ENDL;
+            }
+        }
+    }
+}
+
 //----------------------------------------------------------------------------
 
 void LLVOVolume::generateSilhouette(LLSelectNode* nodep, const LLVector3& view_point)
@@ -3378,7 +3773,7 @@ void LLVOVolume::updateRadius()
 
 BOOL LLVOVolume::isAttachment() const
 {
-	return mState != 0 ;
+	return mAttachmentState != 0 ;
 }
 
 BOOL LLVOVolume::isHUDAttachment() const
@@ -3386,7 +3781,7 @@ BOOL LLVOVolume::isHUDAttachment() const
 	// *NOTE: we assume hud attachment points are in defined range
 	// since this range is constant for backwards compatibility
 	// reasons this is probably a reasonable assumption to make
-	S32 attachment_id = ATTACHMENT_ID_FROM_STATE(mState);
+	S32 attachment_id = ATTACHMENT_ID_FROM_STATE(mAttachmentState);
 	return ( attachment_id >= 31 && attachment_id <= 38 );
 }
 
@@ -3466,16 +3861,25 @@ U32 LLVOVolume::getRenderCost(texture_cost_t &textures) const
 		path_params = volume_params.getPathParams();
 		profile_params = volume_params.getProfileParams();
 
-		F32 weighted_triangles = -1.0;
-		getStreamingCost(NULL, NULL, &weighted_triangles);
-
-		if (weighted_triangles > 0.0)
+        LLMeshCostData costs;
+		if (getCostData(costs))
 		{
-			num_triangles = (U32)(weighted_triangles); 
+            if (isAnimatedObject() && isRiggedMesh())
+            {
+                // Scaling here is to make animated object vs
+                // non-animated object ARC proportional to the
+                // corresponding calculations for streaming cost.
+                num_triangles = (ANIMATED_OBJECT_COST_PER_KTRI * 0.001 * costs.getEstTrisForStreamingCost())/0.06;
+            }
+            else
+            {
+                F32 radius = getScale().length()*0.5f;
+                num_triangles = costs.getRadiusWeightedTris(radius);
+            }
 		}
 	}
 
-	if (num_triangles == 0)
+	if (num_triangles <= 0)
 	{
 		num_triangles = 4;
 	}
@@ -3489,12 +3893,11 @@ U32 LLVOVolume::getRenderCost(texture_cost_t &textures) const
 			S32 size = gMeshRepo.getMeshSize(volume_params.getSculptID(), getLOD());
 			if ( size > 0)
 			{
-				if (gMeshRepo.getSkinInfo(volume_params.getSculptID(), this))
+				if (isRiggedMesh())
 				{
 					// weighted attachment - 1 point for every 3 bytes
 					weighted_mesh = 1;
 				}
-
 			}
 			else
 			{
@@ -3663,6 +4066,14 @@ U32 LLVOVolume::getRenderCost(texture_cost_t &textures) const
 		shame += media_faces * ARC_MEDIA_FACE_COST;
 	}
 
+    // Streaming cost for animated objects includes a fixed cost
+    // per linkset. Add a corresponding charge here translated into
+    // triangles, but not weighted by any graphics properties.
+    if (isAnimatedObject() && isRootEdit())
+    {
+        shame += (ANIMATED_OBJECT_BASE_COST/0.06) * 5.0f;
+    }
+
 	if (shame > mRenderComplexity_current)
 	{
 		mRenderComplexity_current = (S32)shame;
@@ -3671,16 +4082,68 @@ U32 LLVOVolume::getRenderCost(texture_cost_t &textures) const
 	return (U32)shame;
 }
 
-F32 LLVOVolume::getStreamingCost(S32* bytes, S32* visible_bytes, F32* unscaled_value) const
+F32 LLVOVolume::getEstTrianglesMax() const
 {
-	F32 radius = getScale().length()*0.5f;
-
-	if (isMesh())
+	if (isMesh() && getVolume())
 	{
-		return gMeshRepo.getStreamingCost(getVolume()->getParams().getSculptID(), radius, bytes, visible_bytes, mLOD, unscaled_value);
+		return gMeshRepo.getEstTrianglesMax(getVolume()->getParams().getSculptID());
 	}
-	else
+    return 0.f;
+}
+
+F32 LLVOVolume::getEstTrianglesStreamingCost() const
+{
+	if (isMesh() && getVolume())
 	{
+		return gMeshRepo.getEstTrianglesStreamingCost(getVolume()->getParams().getSculptID());
+	}
+    return 0.f;
+}
+
+F32 LLVOVolume::getStreamingCost() const
+{
+	F32 radius = getScale().length()*0.5f;
+    F32 linkset_base_cost = 0.f;
+
+    LLMeshCostData costs;
+    if (getCostData(costs))
+    {
+        if (isAnimatedObject() && isRootEdit())
+        {
+            // Root object of an animated object has this to account for skeleton overhead.
+            linkset_base_cost = ANIMATED_OBJECT_BASE_COST;
+        }
+        if (isMesh())
+        {
+            if (isAnimatedObject() && isRiggedMesh())
+            {
+                return linkset_base_cost + costs.getTriangleBasedStreamingCost();
+            }
+            else
+            {
+                return linkset_base_cost + costs.getRadiusBasedStreamingCost(radius);
+            }
+        }
+        else
+        {
+            return linkset_base_cost + costs.getRadiusBasedStreamingCost(radius);
+        }
+    }
+    else
+    {
+        return 0.f;
+    }
+}
+
+// virtual
+bool LLVOVolume::getCostData(LLMeshCostData& costs) const
+{
+    if (isMesh())
+    {
+        return gMeshRepo.getCostData(getVolume()->getParams().getSculptID(), costs);
+    }
+    else
+    {
 		LLVolume* volume = getVolume();
 		S32 counts[4];
 		LLVolume::getLoDTriangleCounts(volume->getParams(), counts);
@@ -3691,8 +4154,8 @@ F32 LLVOVolume::getStreamingCost(S32* bytes, S32* visible_bytes, F32* unscaled_v
 		header["medium_lod"]["size"] = counts[2] * 10;
 		header["high_lod"]["size"] = counts[3] * 10;
 
-		return LLMeshRepository::getStreamingCost(header, radius, NULL, NULL, -1, unscaled_value);
-	}	
+		return gMeshRepo.getCostData(header, costs);
+    }
 }
 
 //static 
@@ -3762,6 +4225,21 @@ void LLVOVolume::parameterChanged(U16 param_type, LLNetworkData* data, BOOL in_u
 	{
 		mVolumeImpl->onParameterChanged(param_type, data, in_use, local_origin);
 	}
+    if (!local_origin && param_type == LLNetworkData::PARAMS_EXTENDED_MESH)
+    {
+        U32 extended_mesh_flags = getExtendedMeshFlags();
+        bool enabled =  (extended_mesh_flags & LLExtendedMeshParams::ANIMATED_MESH_ENABLED_FLAG);
+        bool was_enabled = (getControlAvatar() != NULL);
+        if (enabled != was_enabled)
+        {
+            LL_DEBUGS("AnimatedObjects") << this
+                                         << " calling onSetExtendedMeshFlags, enabled " << (U32) enabled
+                                         << " was_enabled " << (U32) was_enabled
+                                         << " local_origin " << (U32) local_origin
+                                         << LL_ENDL;
+            onSetExtendedMeshFlags(extended_mesh_flags);
+        }
+    }
 	if (mDrawable.notNull())
 	{
 		BOOL is_light = getIsLight();
@@ -3775,10 +4253,17 @@ void LLVOVolume::parameterChanged(U16 param_type, LLNetworkData* data, BOOL in_u
 void LLVOVolume::setSelected(BOOL sel)
 {
 	LLViewerObject::setSelected(sel);
-	if (mDrawable.notNull())
-	{
-		markForUpdate(TRUE);
-	}
+    if (isAnimatedObject())
+    {
+        getRootEdit()->recursiveMarkForUpdate(TRUE);
+    }
+    else
+    {
+        if (mDrawable.notNull())
+        {
+            markForUpdate(TRUE);
+        }
+    }
 }
 
 void LLVOVolume::updateSpatialExtents(LLVector4a& newMin, LLVector4a& newMax)
@@ -3888,6 +4373,22 @@ const LLMatrix4& LLVOVolume::getWorldMatrix(LLXformMatrix* xform) const
 	return xform->getWorldMatrix();
 }
 
+void LLVOVolume::markForUpdate(BOOL priority)
+{ 
+    if (debugLoggingEnabled("AnimatedObjectsLinkset"))
+    {
+        if (isAnimatedObject() && isRiggedMesh())
+        {
+            std::string vobj_name = llformat("Vol%p", this);
+            F32 est_tris = getEstTrianglesMax();
+            LL_DEBUGS("AnimatedObjectsLinkset") << vobj_name << " markForUpdate, tris " << est_tris << LL_ENDL; 
+        }
+    }
+
+    LLViewerObject::markForUpdate(priority); 
+    mVolumeChanged = TRUE; 
+}
+
 LLVector3 LLVOVolume::agentPositionToVolume(const LLVector3& pos) const
 {
 	LLVector3 ret = pos - getRenderPosition();
@@ -4140,9 +4641,9 @@ BOOL LLVOVolume::lineSegmentIntersect(const LLVector4a& start, const LLVector4a&
 bool LLVOVolume::treatAsRigged()
 {
 	return isSelected() &&
-			isAttachment() &&
-			mDrawable.notNull() &&
-			mDrawable->isState(LLDrawable::RIGGED);
+        (isAttachment() || isAnimatedObject()) &&
+        mDrawable.notNull() &&
+        mDrawable->isState(LLDrawable::RIGGED);
 }
 
 LLRiggedVolume* LLVOVolume::getRiggedVolume()
@@ -4172,9 +4673,7 @@ void LLVOVolume::updateRiggedVolume(bool force_update)
 	}
 
 	LLVolume* volume = getVolume();
-
-	const LLMeshSkinInfo* skin = gMeshRepo.getSkinInfo(volume->getParams().getSculptID(), this);
-
+	const LLMeshSkinInfo* skin = getSkinInfo();
 	if (!skin)
 	{
 		clearRiggedVolume();
@@ -4182,7 +4681,6 @@ void LLVOVolume::updateRiggedVolume(bool force_update)
 	}
 
 	LLVOAvatar* avatar = getAvatar();
-
 	if (!avatar)
 	{
 		clearRiggedVolume();
@@ -4197,7 +4695,6 @@ void LLVOVolume::updateRiggedVolume(bool force_update)
 	}
 
 	mRiggedVolume->update(skin, avatar, volume);
-
 }
 
 static LLTrace::BlockTimerStatHandle FTM_SKIN_RIGGED("Skin");
@@ -4227,6 +4724,19 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
 	{
 		copyVolumeFaces(volume);	
 	}
+    else
+    {
+        bool is_paused = avatar && avatar->areAnimationsPaused();
+		if (is_paused)
+		{
+            S32 frames_paused = LLFrameTimer::getFrameCount() - avatar->getMotionController().getPausedFrame();
+            if (frames_paused > 2)
+            {
+                return;
+            }
+		}
+    }
+
 
 	//build matrix palette
 	static const size_t kMaxJoints = LL_MAX_JOINTS_PER_MESH_OBJECT;
@@ -4235,6 +4745,9 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
 	U32 maxJoints = LLSkinningUtil::getMeshJointCount(skin);
     LLSkinningUtil::initSkinningMatrixPalette((LLMatrix4*)mat, maxJoints, skin, avatar);
 
+    S32 rigged_vert_count = 0;
+    S32 rigged_face_count = 0;
+    LLVector4a box_min, box_max;
 	for (S32 i = 0; i < volume->getNumVolumeFaces(); ++i)
 	{
 		const LLVolumeFace& vol_face = volume->getVolumeFace(i);
@@ -4256,6 +4769,8 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
 				LL_RECORD_BLOCK_TIME(FTM_SKIN_RIGGED);
 
                 U32 max_joints = LLSkinningUtil::getMaxJointCount();
+                rigged_vert_count += dst_face.mNumVertices;
+                rigged_face_count++;
 				for (U32 j = 0; j < dst_face.mNumVertices; ++j)
 				{
 					LLMatrix4a final_mat;
@@ -4270,11 +4785,17 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
 				}
 
 				//update bounding box
+				// VFExtents change
 				LLVector4a& min = dst_face.mExtents[0];
 				LLVector4a& max = dst_face.mExtents[1];
 
 				min = pos[0];
 				max = pos[1];
+                if (i==0)
+                {
+                    box_min = min;
+                    box_max = max;
+                }
 
 				for (U32 j = 1; j < dst_face.mNumVertices; ++j)
 				{
@@ -4282,6 +4803,9 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
 					max.setMax(max, pos[j]);
 				}
 
+                box_min.setMin(min,box_min);
+                box_max.setMax(max,box_max);
+
 				dst_face.mCenter->setAdd(dst_face.mExtents[0], dst_face.mExtents[1]);
 				dst_face.mCenter->mul(0.5f);
 
@@ -4300,6 +4824,10 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
 			}
 		}
 	}
+    mExtraDebugText = llformat("rigged %d/%d - box (%f %f %f) (%f %f %f)",
+                               rigged_face_count, rigged_vert_count,
+                               box_min[0], box_min[1], box_min[2],
+                               box_max[0], box_max[1], box_max[2]);
 }
 
 U32 LLVOVolume::getPartitionType() const
@@ -4788,27 +5316,19 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 
 	group->mBuilt = 1.f;
 	
-	LLVOAvatar* pAvatarVO = NULL;
-
 	LLSpatialBridge* bridge = group->getSpatialPartition()->asBridge();
-	if (bridge)
-	{
-		if (bridge->mAvatar.isNull())
-		{
-			LLViewerObject* vobj = bridge->mDrawable->getVObj();
-			if (vobj)
-			{
-				bridge->mAvatar = vobj->getAvatar();
-			}
-		}
-
-		pAvatarVO = bridge->mAvatar;
-	}
+    LLViewerObject *vobj = NULL;
+    LLVOVolume *vol_obj = NULL;
 
-	if (pAvatarVO)
+	if (bridge)
 	{
-		pAvatarVO->subtractAttachmentArea( group->mSurfaceArea );
+        vobj = bridge->mDrawable->getVObj();
+        vol_obj = dynamic_cast<LLVOVolume*>(vobj);
 	}
+    if (vol_obj)
+    {
+        vol_obj->updateVisualComplexity();
+    }
 
 	group->mGeometryBytes = 0;
 	group->mSurfaceArea = 0;
@@ -4851,7 +5371,8 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 		LL_RECORD_BLOCK_TIME(FTM_REBUILD_VOLUME_FACE_LIST);
 
 		//get all the faces into a list
-		for (LLSpatialGroup::element_iter drawable_iter = group->getDataBegin(); drawable_iter != group->getDataEnd(); ++drawable_iter)
+		for (LLSpatialGroup::element_iter drawable_iter = group->getDataBegin(); 
+             drawable_iter != group->getDataEnd(); ++drawable_iter)
 		{
 			LLDrawable* drawablep = (LLDrawable*)(*drawable_iter)->getDrawable();
 		
@@ -4866,12 +5387,14 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 			}
 
 			LLVOVolume* vobj = drawablep->getVOVolume();
-
+            
 			if (!vobj)
 			{
 				continue;
 			}
 
+            std::string vobj_name = llformat("Vol%p", vobj);
+
 			if (vobj->isMesh() &&
 				((vobj->getVolume() && !vobj->getVolume()->isMeshAssetLoaded()) || !gMeshRepo.meshRezEnabled()))
 			{
@@ -4885,29 +5408,46 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 				group->mSurfaceArea += volume->getSurfaceArea() * llmax(llmax(scale.mV[0], scale.mV[1]), scale.mV[2]);
 			}
 
+            bool is_mesh = vobj->isMesh();
+            F32 est_tris = vobj->getEstTrianglesMax();
+
+            vobj->updateControlAvatar();
+            
+            LL_DEBUGS("AnimatedObjectsLinkset") << vobj_name << " rebuilding, isAttachment: " << (U32) vobj->isAttachment()
+                                                << " is_mesh " << is_mesh
+                                                << " est_tris " << est_tris
+                                                << " is_animated " << vobj->isAnimatedObject()
+                                                << " can_animate " << vobj->canBeAnimatedObject() 
+                                                << " cav " << vobj->getControlAvatar() 
+                                                << " lod " << vobj->getLOD()
+                                                << " drawable rigged " << (drawablep->isState(LLDrawable::RIGGED))
+                                                << " drawable state " << drawablep->getState()
+                                                << " playing " << (U32) (vobj->getControlAvatar() ? vobj->getControlAvatar()->mPlaying : false)
+                                                << " frame " << LLFrameTimer::getFrameCount()
+                                                << LL_ENDL;
+
 			llassert_always(vobj);
 			vobj->updateTextureVirtualSize(true);
 			vobj->preRebuild();
 
 			drawablep->clearState(LLDrawable::HAS_ALPHA);
 
-			bool rigged = vobj->isAttachment() && 
-                          vobj->isMesh() && 
-						  gMeshRepo.getSkinInfo(vobj->getVolume()->getParams().getSculptID(), vobj);
-
-			bool bake_sunlight = LLPipeline::sBakeSunlight && drawablep->isStatic();
-
-			bool is_rigged = false;
-
-            if (rigged && pAvatarVO)
+            if (vobj->isRiggedMesh() &&
+                ((vobj->isAnimatedObject() && vobj->getControlAvatar()) ||
+                 (!vobj->isAnimatedObject() && vobj->getAvatar())))
             {
-                pAvatarVO->addAttachmentOverridesForObject(vobj);
-				if (!LLApp::isExiting() && pAvatarVO->isSelf() && debugLoggingEnabled("AvatarAttachments"))
-                {
-                    bool verbose = true;
-					pAvatarVO->showAttachmentOverrides(verbose);
-				}
+                vobj->getAvatar()->addAttachmentOverridesForObject(vobj, NULL, false);
             }
+            
+            // Standard rigged mesh attachments: 
+			bool rigged = !vobj->isAnimatedObject() && vobj->isRiggedMesh() && vobj->isAttachment();
+            // Animated objects. Have to check for isRiggedMesh() to
+            // exclude static objects in animated object linksets.
+			rigged = rigged || (vobj->isAnimatedObject() && vobj->isRiggedMesh() &&
+                vobj->getControlAvatar() && vobj->getControlAvatar()->mPlaying);
+
+			bool bake_sunlight = LLPipeline::sBakeSunlight && drawablep->isStatic();
+			bool any_rigged_face = false;
 
 			//for each face
 			for (S32 i = 0; i < drawablep->getNumFaces(); i++)
@@ -4925,7 +5465,7 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 				//sum up face verts and indices
 				drawablep->updateFaceSize(i);
 			
-				if (rigged) 
+				if (rigged)
 				{
 					if (!facep->isState(LLFace::RIGGED))
 					{ //completely reset vertex buffer
@@ -4933,7 +5473,7 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 					}
 		
 					facep->setState(LLFace::RIGGED);
-					is_rigged = true;
+					any_rigged_face = true;
 				
 					//get drawpool of avatar with rigged face
 					LLDrawPoolAvatar* pool = get_avatar_drawpool(vobj);				
@@ -5277,7 +5817,7 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 				}		
 			}
 			
-			if (is_rigged)
+			if (any_rigged_face)
 			{
 				if (!drawablep->isState(LLDrawable::RIGGED))
 				{
@@ -5291,6 +5831,7 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 			else
 			{
 				drawablep->clearState(LLDrawable::RIGGED);
+                vobj->updateRiggedVolume();
 			}
 		}
 	}
@@ -5350,9 +5891,9 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 			LLDrawable* drawablep = (LLDrawable*)(*drawable_iter)->getDrawable();
 			if(drawablep)
 			{
-			drawablep->clearState(LLDrawable::REBUILD_ALL);
-		}
-	}
+                drawablep->clearState(LLDrawable::REBUILD_ALL);
+            }
+        }
 	}
 
 	group->mLastUpdateTime = gFrameTimeSeconds;
@@ -5365,11 +5906,6 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 	}
 
 	mFaceList.clear();
-
-	if (pAvatarVO)
-	{
-        pAvatarVO->addAttachmentArea( group->mSurfaceArea );
-	}
 }
 
 static LLTrace::BlockTimerStatHandle FTM_REBUILD_MESH_FLUSH("Flush Mesh");
@@ -5398,6 +5934,15 @@ void LLVolumeGeometryManager::rebuildMesh(LLSpatialGroup* group)
 			if (drawablep && !drawablep->isDead() && drawablep->isState(LLDrawable::REBUILD_ALL) && !drawablep->isState(LLDrawable::RIGGED) )
 			{
 				LLVOVolume* vobj = drawablep->getVOVolume();
+                if (debugLoggingEnabled("AnimatedObjectsLinkset"))
+                {
+                    if (vobj->isAnimatedObject() && vobj->isRiggedMesh())
+                    {
+                        std::string vobj_name = llformat("Vol%p", vobj);
+                        F32 est_tris = vobj->getEstTrianglesMax();
+                        LL_DEBUGS("AnimatedObjectsLinkset") << vobj_name << " rebuildMesh, tris " << est_tris << LL_ENDL; 
+                    }
+                }
 				if (vobj->isNoLOD()) continue;
 
 				vobj->preRebuild();
diff --git a/indra/newview/llvovolume.h b/indra/newview/llvovolume.h
index a0342d31a2..0882fc095d 100644
--- a/indra/newview/llvovolume.h
+++ b/indra/newview/llvovolume.h
@@ -64,6 +64,8 @@ public:
 	}
 
 	void update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, const LLVolume* src_volume);
+
+    std::string mExtraDebugText;
 };
 
 // Base class for implementations of the volume - Primitive, Flexible Object, etc.
@@ -136,8 +138,10 @@ public:
 	/*virtual*/	const LLMatrix4	getRenderMatrix() const;
 				typedef std::map<LLUUID, S32> texture_cost_t;
 				U32 	getRenderCost(texture_cost_t &textures) const;
-				F32		getStreamingCost(S32* bytes, S32* visible_bytes, F32* unscaled_value) const;
-	/*virtual*/	F32		getStreamingCost(S32* bytes = NULL, S32* visible_bytes = NULL) { return getStreamingCost(bytes, visible_bytes, NULL); }
+    /*virtual*/	F32		getEstTrianglesMax() const;
+    /*virtual*/	F32		getEstTrianglesStreamingCost() const;
+    /* virtual*/ F32	getStreamingCost() const;
+    /*virtual*/ bool getCostData(LLMeshCostData& costs) const;
 
 	/*virtual*/ U32		getTriangleCount(S32* vcount = NULL) const;
 	/*virtual*/ U32		getHighLODTriangleCount();
@@ -163,7 +167,7 @@ public:
 	/*virtual*/ F32  	getRadius() const						{ return mVObjRadius; };
 				const LLMatrix4& getWorldMatrix(LLXformMatrix* xform) const;
 
-				void	markForUpdate(BOOL priority)			{ LLViewerObject::markForUpdate(priority); mVolumeChanged = TRUE; }
+				void	markForUpdate(BOOL priority);
 				void	markForUnload()							{ LLViewerObject::markForUnload(TRUE); mVolumeChanged = TRUE; }
 				void    faceMappingChanged()                    { mFaceMappingChanged=TRUE; };
 
@@ -264,12 +268,29 @@ public:
 	virtual BOOL isFlexible() const;
 	virtual BOOL isSculpted() const;
 	virtual BOOL isMesh() const;
+	virtual BOOL isRiggedMesh() const;
 	virtual BOOL hasLightTexture() const;
 
+    
 	BOOL isVolumeGlobal() const;
 	BOOL canBeFlexible() const;
 	BOOL setIsFlexible(BOOL is_flexible);
 
+    const LLMeshSkinInfo* getSkinInfo() const;
+    
+    // Extended Mesh Properties
+    U32 getExtendedMeshFlags() const;
+    void onSetExtendedMeshFlags(U32 flags);
+    void setExtendedMeshFlags(U32 flags);
+    bool canBeAnimatedObject() const;
+    bool isAnimatedObject() const;
+    virtual void onReparent(LLViewerObject *old_parent, LLViewerObject *new_parent);
+    virtual void afterReparent();
+
+    //virtual
+    void updateRiggingInfo();
+    S32 mLastRiggingInfoLOD;
+    
     // Functions that deal with media, or media navigation
     
     // Update this object's media data with the given media data array
@@ -303,7 +324,10 @@ public:
 	bool hasMedia() const;
 	
 	LLVector3 getApproximateFaceNormal(U8 face_id);
-	
+
+    // Flag any corresponding avatars as needing update.
+    void updateVisualComplexity();
+    
 	void notifyMeshLoaded();
 	
 	// Returns 'true' iff the media data for this object is in flight
@@ -332,7 +356,7 @@ public:
 	void clearRiggedVolume();
 
 protected:
-	S32	computeLODDetail(F32	distance, F32 radius, F32 lod_factor);
+	S32	computeLODDetail(F32 distance, F32 radius, F32 lod_factor);
 	BOOL calcLOD();
 	LLFace* addFace(S32 face_index);
 	void updateTEData();
@@ -356,6 +380,9 @@ public:
 
 	LLViewerTextureAnim *mTextureAnimp;
 	U8 mTexAnimMode;
+    F32 mLODDistance;
+    F32 mLODAdjustedDistance;
+    F32 mLODRadius;
 private:
 	friend class LLDrawable;
 	friend class LLFace;
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index e81515d52f..40d6d325ba 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -3356,6 +3356,18 @@ void LLPipeline::markRebuild(LLDrawable *drawablep, LLDrawable::EDrawableFlags f
 {
 	if (drawablep && !drawablep->isDead() && assertInitialized())
 	{
+        if (debugLoggingEnabled("AnimatedObjectsLinkset"))
+        {
+            LLVOVolume *vol_obj = drawablep->getVOVolume();
+            if (vol_obj && vol_obj->isAnimatedObject() && vol_obj->isRiggedMesh())
+            {
+                std::string vobj_name = llformat("Vol%p", vol_obj);
+                F32 est_tris = vol_obj->getEstTrianglesMax();
+                LL_DEBUGS("AnimatedObjectsLinkset") << vobj_name << " markRebuild, tris " << est_tris 
+                                                    << " priority " << (S32) priority << " flag " << std::hex << flag << LL_ENDL; 
+            }
+        }
+    
 		if (!drawablep->isState(LLDrawable::BUILT))
 		{
 			priority = true;
@@ -6844,7 +6856,7 @@ bool LLPipeline::toggleRenderTypeControlNegated(S32 type)
 }
 
 //static
-void LLPipeline::toggleRenderDebug(U32 bit)
+void LLPipeline::toggleRenderDebug(U64 bit)
 {
 	if (gPipeline.hasRenderDebugMask(bit))
 	{
@@ -6859,7 +6871,7 @@ void LLPipeline::toggleRenderDebug(U32 bit)
 
 
 //static
-bool LLPipeline::toggleRenderDebugControl(U32 bit)
+bool LLPipeline::toggleRenderDebugControl(U64 bit)
 {
 	return gPipeline.hasRenderDebugMask(bit);
 }
@@ -11650,6 +11662,7 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar)
 
 	avatar->mNeedsImpostorUpdate = FALSE;
 	avatar->cacheImpostorValues();
+	avatar->mLastImpostorUpdateFrameTime = gFrameTimeSeconds;
 
 	LLVertexBuffer::unbind();
 	LLGLState::checkStates();
diff --git a/indra/newview/pipeline.h b/indra/newview/pipeline.h
index f43607ccb0..29fe1cbd33 100644
--- a/indra/newview/pipeline.h
+++ b/indra/newview/pipeline.h
@@ -330,10 +330,10 @@ public:
 	void addTrianglesDrawn(S32 index_count, U32 render_type = LLRender::TRIANGLES);
 
 	bool hasRenderDebugFeatureMask(const U32 mask) const	{ return bool(mRenderDebugFeatureMask & mask); }
-	bool hasRenderDebugMask(const U32 mask) const			{ return bool(mRenderDebugMask & mask); }
+	bool hasRenderDebugMask(const U64 mask) const			{ return bool(mRenderDebugMask & mask); }
 	void setAllRenderDebugFeatures() { mRenderDebugFeatureMask = 0xffffffff; }
 	void clearAllRenderDebugFeatures() { mRenderDebugFeatureMask = 0x0; }
-	void setAllRenderDebugDisplays() { mRenderDebugMask = 0xffffffff; }
+	void setAllRenderDebugDisplays() { mRenderDebugMask = 0xffffffffffffffff; }
 	void clearAllRenderDebugDisplays() { mRenderDebugMask = 0x0; }
 
 	bool hasRenderType(const U32 type) const;
@@ -357,11 +357,11 @@ public:
 
 	// For UI control of render features
 	static bool hasRenderTypeControl(U32 data);
-	static void toggleRenderDebug(U32 data);
+	static void toggleRenderDebug(U64 data);
 	static void toggleRenderDebugFeature(U32 data);
 	static void toggleRenderTypeControl(U32 data);
 	static bool toggleRenderTypeControlNegated(S32 data);
-	static bool toggleRenderDebugControl(U32 data);
+	static bool toggleRenderDebugControl(U64 data);
 	static bool toggleRenderDebugFeatureControl(U32 data);
 	static void setRenderDebugFeatureControl(U32 bit, bool value);
 
@@ -500,39 +500,41 @@ public:
 		RENDER_DEBUG_FEATURE_FOOT_SHADOWS		= 0x0100,
 	};
 
-	enum LLRenderDebugMask
+	enum LLRenderDebugMask: U64
 	{
-		RENDER_DEBUG_COMPOSITION		= 0x00000001,
-		RENDER_DEBUG_VERIFY				= 0x00000002,
-		RENDER_DEBUG_BBOXES				= 0x00000004,
-		RENDER_DEBUG_OCTREE				= 0x00000008,
-		RENDER_DEBUG_WIND_VECTORS		= 0x00000010,
-		RENDER_DEBUG_OCCLUSION			= 0x00000020,
-		RENDER_DEBUG_POINTS				= 0x00000040,
-		RENDER_DEBUG_TEXTURE_PRIORITY	= 0x00000080,
-		RENDER_DEBUG_TEXTURE_AREA		= 0x00000100,
-		RENDER_DEBUG_FACE_AREA			= 0x00000200,
-		RENDER_DEBUG_PARTICLES			= 0x00000400,
-		RENDER_DEBUG_GLOW				= 0x00000800,
-		RENDER_DEBUG_TEXTURE_ANIM		= 0x00001000,
-		RENDER_DEBUG_LIGHTS				= 0x00002000,
-		RENDER_DEBUG_BATCH_SIZE			= 0x00004000,
-		RENDER_DEBUG_ALPHA_BINS			= 0x00008000,
-		RENDER_DEBUG_RAYCAST            = 0x00010000,
-		RENDER_DEBUG_AVATAR_DRAW_INFO	= 0x00020000,
-		RENDER_DEBUG_SHADOW_FRUSTA		= 0x00040000,
-		RENDER_DEBUG_SCULPTED           = 0x00080000,
-		RENDER_DEBUG_AVATAR_VOLUME      = 0x00100000,
-		RENDER_DEBUG_AVATAR_JOINTS      = 0x00200000,
-		RENDER_DEBUG_BUILD_QUEUE		= 0x00400000,
-		RENDER_DEBUG_AGENT_TARGET       = 0x00800000,
-		RENDER_DEBUG_UPDATE_TYPE		= 0x01000000,
-		RENDER_DEBUG_PHYSICS_SHAPES     = 0x02000000,
-		RENDER_DEBUG_NORMALS	        = 0x04000000,
-		RENDER_DEBUG_LOD_INFO	        = 0x08000000,
-		RENDER_DEBUG_RENDER_COMPLEXITY  = 0x10000000,
-		RENDER_DEBUG_ATTACHMENT_BYTES	= 0x20000000,
-		RENDER_DEBUG_TEXEL_DENSITY		= 0x40000000
+		RENDER_DEBUG_COMPOSITION		=  0x00000001,
+		RENDER_DEBUG_VERIFY				=  0x00000002,
+		RENDER_DEBUG_BBOXES				=  0x00000004,
+		RENDER_DEBUG_OCTREE				=  0x00000008,
+		RENDER_DEBUG_WIND_VECTORS		=  0x00000010,
+		RENDER_DEBUG_OCCLUSION			=  0x00000020,
+		RENDER_DEBUG_POINTS				=  0x00000040,
+		RENDER_DEBUG_TEXTURE_PRIORITY	=  0x00000080,
+		RENDER_DEBUG_TEXTURE_AREA		=  0x00000100,
+		RENDER_DEBUG_FACE_AREA			=  0x00000200,
+		RENDER_DEBUG_PARTICLES			=  0x00000400,
+		RENDER_DEBUG_GLOW				=  0x00000800, // not used
+		RENDER_DEBUG_TEXTURE_ANIM		=  0x00001000,
+		RENDER_DEBUG_LIGHTS				=  0x00002000,
+		RENDER_DEBUG_BATCH_SIZE			=  0x00004000,
+		RENDER_DEBUG_ALPHA_BINS			=  0x00008000, // not used
+		RENDER_DEBUG_RAYCAST            =  0x00010000,
+		RENDER_DEBUG_AVATAR_DRAW_INFO	=  0x00020000,
+		RENDER_DEBUG_SHADOW_FRUSTA		=  0x00040000,
+		RENDER_DEBUG_SCULPTED           =  0x00080000,
+		RENDER_DEBUG_AVATAR_VOLUME      =  0x00100000,
+		RENDER_DEBUG_AVATAR_JOINTS      =  0x00200000,
+		RENDER_DEBUG_BUILD_QUEUE		=  0x00400000,
+		RENDER_DEBUG_AGENT_TARGET       =  0x00800000,
+		RENDER_DEBUG_UPDATE_TYPE		=  0x01000000,
+		RENDER_DEBUG_PHYSICS_SHAPES     =  0x02000000,
+		RENDER_DEBUG_NORMALS	        =  0x04000000,
+		RENDER_DEBUG_LOD_INFO	        =  0x08000000,
+		RENDER_DEBUG_RENDER_COMPLEXITY  =  0x10000000,
+		RENDER_DEBUG_ATTACHMENT_BYTES	=  0x20000000, // not used
+		RENDER_DEBUG_TEXEL_DENSITY		=  0x40000000,
+		RENDER_DEBUG_TRIANGLE_COUNT		=  0x80000000,
+		RENDER_DEBUG_IMPOSTORS			= 0x100000000
 	};
 
 public:
@@ -669,10 +671,10 @@ protected:
 	std::stack<std::string> mRenderTypeEnableStack;
 
 	U32						mRenderDebugFeatureMask;
-	U32						mRenderDebugMask;
+	U64						mRenderDebugMask;
+	U64						mOldRenderDebugMask;
 	std::stack<U32>			mRenderDebugFeatureStack;
 
-	U32						mOldRenderDebugMask;
 	
 	/////////////////////////////////////////////
 	//
diff --git a/indra/newview/skins/default/xui/en/floater_model_preview.xml b/indra/newview/skins/default/xui/en/floater_model_preview.xml
index 2750316f2e..3db431de1b 100644
--- a/indra/newview/skins/default/xui/en/floater_model_preview.xml
+++ b/indra/newview/skins/default/xui/en/floater_model_preview.xml
@@ -14,6 +14,7 @@
 
   <string name="status_idle"></string>
   <string name="status_parse_error">Error: Dae parsing issue - see log for details.</string>
+  <string name="status_bind_shape_orientation">Warning: bind shape matrix is not in standard X-forward orientation.</string>
   <string name="status_material_mismatch">Error: Material of model is not a subset of reference model.</string>
   <string name="status_reading_file">Loading...</string>
   <string name="status_generating_meshes">Generating Meshes...</string>
diff --git a/indra/newview/skins/default/xui/en/floater_tools.xml b/indra/newview/skins/default/xui/en/floater_tools.xml
index bdcf3648fa..d9a15fed9e 100644
--- a/indra/newview/skins/default/xui/en/floater_tools.xml
+++ b/indra/newview/skins/default/xui/en/floater_tools.xml
@@ -2,7 +2,7 @@
 <floater
  positioning="cascading"
  legacy_header_height="18"
- height="590"
+ height="600"
  layout="topleft"
  bg_opaque_image="Window_NoTitle_Foreground"
  bg_alpha_image="Window_NoTitle_Background"
@@ -2135,7 +2135,7 @@ even though the user gets a free copy.
         <panel
          border="false"
          follows="all"
-         height="367"
+         height="387"
          label="Features"
          layout="topleft"
          left_delta="0"
@@ -2173,13 +2173,23 @@ even though the user gets a free copy.
                 Edit object features:
             </text>
             <check_box
-             height="19"
+             height="15"
+             label="Animated Mesh"
+             layout="topleft"
+             left="10"
+             name="Animated Mesh Checkbox Ctrl"
+             tool_tip="Allows rigged mesh objects to be animated independently"
+             top_pad="10"
+             width="121" />
+            <check_box
+             height="10"
              label="Flexible Path"
+             follows="left|top"
              layout="topleft"
              left="10"
              name="Flexible1D Checkbox Ctrl"
              tool_tip="Allows object to flex about the Z axis (Client-side only)"
-             top_pad="20"
+             top_pad="15"
              width="121" />
             <spinner
              follows="left|top"
diff --git a/indra/newview/skins/default/xui/en/menu_object.xml b/indra/newview/skins/default/xui/en/menu_object.xml
index dc9622a27d..ce34508303 100644
--- a/indra/newview/skins/default/xui/en/menu_object.xml
+++ b/indra/newview/skins/default/xui/en/menu_object.xml
@@ -214,4 +214,20 @@
     <menu_item_call.on_enable
      function="EnableMuteParticle" />
   </menu_item_call>
+    <menu_item_call
+		 label="Dump XML"
+         name="Dump XML">
+            <menu_item_call.on_click
+             function="Advanced.AppearanceToXML" />
+            <menu_item_call.on_visible
+             function="Advanced.EnableAppearanceToXML"/>
+    </menu_item_call>
+    <menu_item_call
+		 label="Reset Skeleton"
+         name="Reset Skeleton">
+            <menu_item_call.on_click
+                function="Avatar.ResetSkeleton" />
+            <menu_item_call.on_visible
+             function="Avatar.EnableResetSkeleton"/>
+    </menu_item_call>
 </context_menu>
diff --git a/indra/newview/skins/default/xui/en/menu_viewer.xml b/indra/newview/skins/default/xui/en/menu_viewer.xml
index 7c6b1bc357..42744b561f 100644
--- a/indra/newview/skins/default/xui/en/menu_viewer.xml
+++ b/indra/newview/skins/default/xui/en/menu_viewer.xml
@@ -2652,6 +2652,16 @@
            parameter="lod info" />
         </menu_item_check>
         <menu_item_check
+         label="Triangle Count"
+         name="Triangle Count">
+          <menu_item_check.on_check
+           function="Advanced.CheckInfoDisplay"
+           parameter="triangle count" />
+          <menu_item_check.on_click
+           function="Advanced.ToggleInfoDisplay"
+           parameter="triangle count" />
+        </menu_item_check>
+        <menu_item_check
          label="Build Queue"
          name="Build Queue">
           <menu_item_check.on_check
@@ -3560,6 +3570,16 @@
                  function="Advanced.ToggleInfoDisplay"
                  parameter="agent target" />
             </menu_item_check>
+            <menu_item_check
+             label="Show Impostor Extents"
+             name="Show Impostor Extents">
+                <menu_item_check.on_check
+                 function="Advanced.CheckInfoDisplay"
+                 parameter="impostors" />
+                <menu_item_check.on_click
+                 function="Advanced.ToggleInfoDisplay"
+                 parameter="impostors" />
+            </menu_item_check>
             <!-- Appears not to exist anymore
             <menu_item_check
              label="Debug Rotation"
diff --git a/indra/newview/skins/default/xui/en/notifications.xml b/indra/newview/skins/default/xui/en/notifications.xml
index 28eda26db4..cc57e1375a 100644
--- a/indra/newview/skins/default/xui/en/notifications.xml
+++ b/indra/newview/skins/default/xui/en/notifications.xml
@@ -10225,6 +10225,14 @@ You have been teleported by the object '[OBJECT_NAME]' owned by an unknown user.
 Unable to create requested object. The region is full.
   </notification>
 
+   <notification
+    icon="alertmodal.tga"
+   name="CantCreateAnimatedObjectTooLarge"
+   type="notify">
+   <tag>fail</tag>
+Unable to create requested animated object because it exceeds the rigged triangle limit.
+  </notification>
+
   <notification
    icon="alertmodal.tga"
    name="CantAttackMultipleObjOneSpot"
@@ -10355,6 +10363,46 @@ You are not allowed to change this shape.
 
   <notification
    icon="alertmodal.tga"
+   name="NoPermsTooManyAttachedAnimatedObjects"
+   type="notify">
+   <tag>fail</tag>
+Operation would cause the number of attached animated objects to exceed the limit.
+  </notification>
+
+  <notification
+   icon="alertmodal.tga"
+   name="NoPermsLinkAnimatedObjectTooLarge"
+   type="notify">
+   <tag>fail</tag>
+Can't link these objects because the resulting animated object would exceed the rigged triangle limit.
+  </notification>
+
+  <notification
+   icon="alertmodal.tga"
+   name="NoPermsSetFlagAnimatedObjectTooLarge"
+   type="notify">
+   <tag>fail</tag>
+Can't make this object into an animated object because it would exceed the rigged triangle limit.
+  </notification>
+
+  <notification
+   icon="alertmodal.tga"
+   name="CantChangeAnimatedObjectStateInsufficientLand"
+   type="notify">
+   <tag>fail</tag>
+Can't change animated object state for this object because it would cause parcel limit to be exceeded.
+  </notification>
+
+  <notification
+   icon="alertmodal.tga"
+   name="ErrorNoMeshData"
+   type="notify">
+   <tag>fail</tag>
+Server error: cannot complete this operation because mesh data is not loaded.
+  </notification>
+
+  <notification
+   icon="alertmodal.tga"
    name="NoAccessToClaimObjects"
    type="notify">
    <tag>fail</tag>