1 files changed, 45 insertions, 13 deletions

diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 8bf9d12b33..56028e051f 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -230,6 +230,7 @@ LLVOVolume::LLVOVolume(const LLUUID &id, const LLPCode pcode, LLViewerRegion *re
 
 	mMediaImplList.resize(getNumTEs());
 	mLastFetchedMediaVersion = -1;
+    mServerDrawableUpdateCount = 0;
 	memset(&mIndexInTex, 0, sizeof(S32) * LLRender::NUM_VOLUME_TEXTURE_CHANNELS);
 	mMDCImplCount = 0;
 	mLastRiggingInfoLOD = -1;
@@ -325,6 +326,9 @@ U32 LLVOVolume::processUpdateMessage(LLMessageSystem *mesgsys,
 	 	
 	LLColor4U color;
 	const S32 teDirtyBits = (TEM_CHANGE_TEXTURE|TEM_CHANGE_COLOR|TEM_CHANGE_MEDIA);
+    const bool previously_volume_changed = mVolumeChanged;
+    const bool previously_face_mapping_changed = mFaceMappingChanged;
+    const bool previously_color_changed = mColorChanged;
 
 	// Do base class updates...
 	U32 retval = LLViewerObject::processUpdateMessage(mesgsys, user_data, block_num, update_type, dp);
@@ -548,9 +552,31 @@ U32 LLVOVolume::processUpdateMessage(LLMessageSystem *mesgsys,
 	// ...and clean up any media impls
 	cleanUpMediaImpls();
 
+    if ((
+            (mVolumeChanged && !previously_volume_changed) ||
+            (mFaceMappingChanged && !previously_face_mapping_changed) ||
+            (mColorChanged && !previously_color_changed)
+        )
+        && !mLODChanged) {
+        onDrawableUpdateFromServer();
+    }
+
 	return retval;
 }
 
+// Called when a volume, material, etc is updated by the server, possibly by a
+// script. If this occurs too often for this object, mark it as active so that
+// it doesn't disrupt the octree/render batches, thereby potentially causing a
+// big performance penalty.
+void LLVOVolume::onDrawableUpdateFromServer()
+{
+    constexpr U32 UPDATES_UNTIL_ACTIVE = 8;
+    ++mServerDrawableUpdateCount;
+    if (mDrawable && !mDrawable->isActive() && mServerDrawableUpdateCount > UPDATES_UNTIL_ACTIVE)
+    {
+        mDrawable->makeActive();
+    }
+}
 
 void LLVOVolume::animateTextures()
 {
@@ -1670,7 +1696,7 @@ void LLVOVolume::regenFaces()
 	}
 }
 
-BOOL LLVOVolume::genBBoxes(BOOL force_global)
+BOOL LLVOVolume::genBBoxes(BOOL force_global, BOOL should_update_octree_bounds)
 {
     LL_PROFILE_ZONE_SCOPED;
     BOOL res = TRUE;
@@ -1746,10 +1772,9 @@ BOOL LLVOVolume::genBBoxes(BOOL force_global)
         }
     }
 
-
     if (any_valid_boxes)
     {
-        if (rebuild)
+        if (rebuild && should_update_octree_bounds)
         {
             //get the Avatar associated with this object if it's rigged
             LLVOAvatar* avatar = nullptr;
@@ -1911,7 +1936,7 @@ void LLVOVolume::updateRelativeXform(bool force_identity)
 	}
 }
 
-bool LLVOVolume::lodOrSculptChanged(LLDrawable *drawable, BOOL &compiled)
+bool LLVOVolume::lodOrSculptChanged(LLDrawable *drawable, BOOL &compiled, BOOL &should_update_octree_bounds)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_VOLUME;
 	bool regen_faces = false;
@@ -1943,6 +1968,9 @@ bool LLVOVolume::lodOrSculptChanged(LLDrawable *drawable, BOOL &compiled)
         }
 
 		compiled = TRUE;
+        // new_lod > old_lod breaks a feedback loop between LOD updates and
+        // bounding box updates.
+        should_update_octree_bounds = should_update_octree_bounds || mSculptChanged || new_lod > old_lod;
 		sNumLODChanges += new_num_faces;
 
 		if ((S32)getNumTEs() != getVolume()->getNumFaces())
@@ -2002,8 +2030,6 @@ BOOL LLVOVolume::updateGeometry(LLDrawable *drawable)
 		group->dirtyMesh();
 	}
 
-	BOOL compiled = FALSE;
-			
 	updateRelativeXform();
 	
 	if (mDrawable.isNull()) // Not sure why this is happening, but it is...
@@ -2011,49 +2037,55 @@ BOOL LLVOVolume::updateGeometry(LLDrawable *drawable)
 		return TRUE; // No update to complete
 	}
 
+	BOOL compiled = FALSE;
+    // This should be true in most cases, unless we're sure no octree update is
+    // needed.
+    BOOL should_update_octree_bounds = bool(getRiggedVolume()) || mDrawable->isState(LLDrawable::REBUILD_POSITION) || !mDrawable->getSpatialExtents()->isFinite3();
+
 	if (mVolumeChanged || mFaceMappingChanged)
 	{
 		dirtySpatialGroup(drawable->isState(LLDrawable::IN_REBUILD_Q1));
 
 		bool was_regen_faces = false;
+        should_update_octree_bounds = true;
 
 		if (mVolumeChanged)
 		{
-			was_regen_faces = lodOrSculptChanged(drawable, compiled);
+            was_regen_faces = lodOrSculptChanged(drawable, compiled, should_update_octree_bounds);
 			drawable->setState(LLDrawable::REBUILD_VOLUME);
 		}
 		else if (mSculptChanged || mLODChanged || mColorChanged)
 		{
 			compiled = TRUE;
-			was_regen_faces = lodOrSculptChanged(drawable, compiled);
+            was_regen_faces = lodOrSculptChanged(drawable, compiled, should_update_octree_bounds);
 		}
 
 		if (!was_regen_faces) {
 			regenFaces();
 		}
-
-		genBBoxes(FALSE);
 	}
 	else if (mLODChanged || mSculptChanged || mColorChanged)
 	{
 		dirtySpatialGroup(drawable->isState(LLDrawable::IN_REBUILD_Q1));
 		compiled = TRUE;
-		lodOrSculptChanged(drawable, compiled);
+        lodOrSculptChanged(drawable, compiled, should_update_octree_bounds);
 		
 		if(drawable->isState(LLDrawable::REBUILD_RIGGED | LLDrawable::RIGGED)) 
 		{
 			updateRiggedVolume(false);
 		}
-		genBBoxes(FALSE);
 	}
 	// it has its own drawable (it's moved) or it has changed UVs or it has changed xforms from global<->local
 	else
 	{
 		compiled = TRUE;
 		// All it did was move or we changed the texture coordinate offset
-		genBBoxes(FALSE);
 	}
 
+    // Generate bounding boxes if needed, and update the object's size in the
+    // octree
+    genBBoxes(FALSE, should_update_octree_bounds);
+
 	// Update face flags
 	updateFaceFlags();