3 files changed, 153 insertions, 0 deletions
diff --git a/indra/llmath/CMakeLists.txt b/indra/llmath/CMakeLists.txt
index dab566da56..379c3ee9ea 100644
--- a/indra/llmath/CMakeLists.txt
+++ b/indra/llmath/CMakeLists.txt
@@ -25,6 +25,7 @@ set(llmath_SOURCE_FILES
     lloctree.cpp
     llperlin.cpp
     llquaternion.cpp
+    llrigginginfo.cpp
     llrect.cpp
     llsphere.cpp
     llvector4a.cpp
@@ -71,6 +72,7 @@ set(llmath_HEADER_FILES
     llquaternion2.h
     llquaternion2.inl
     llrect.h
+    llrigginginfo.h
     llsimdmath.h
     llsimdtypes.h
     llsimdtypes.inl
diff --git a/indra/llmath/llrigginginfo.cpp b/indra/llmath/llrigginginfo.cpp
new file mode 100644
index 0000000000..925179c2ba
--- /dev/null
+++ b/indra/llmath/llrigginginfo.cpp
@@ -0,0 +1,96 @@
+/**
+* @file llrigginginfo.cpp
+* @brief  Functions for tracking rigged box extents
+*
+* $LicenseInfo:firstyear=2018&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2018, 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 "llmath.h"
+#include "llrigginginfo.h"
+
+//-----------------------------------------------------------------------------
+// LLJointRiggingInfo
+//-----------------------------------------------------------------------------
+LLJointRiggingInfo::LLJointRiggingInfo()
+{
+    mRiggedExtents[0].clear();
+    mRiggedExtents[1].clear();
+    mIsRiggedTo = false;
+}
+
+bool LLJointRiggingInfo::isRiggedTo() const
+{
+    return mIsRiggedTo;
+}
+
+void LLJointRiggingInfo::setIsRiggedTo(bool val)
+{
+    mIsRiggedTo = val;
+}
+    
+LLVector4a *LLJointRiggingInfo::getRiggedExtents()
+{
+    return mRiggedExtents;
+}
+
+const LLVector4a *LLJointRiggingInfo::getRiggedExtents() const
+{
+    return mRiggedExtents;
+}
+
+// Combine two rigging info states.
+// - isRiggedTo if either of the source infos are rigged to
+// - box is union of the two sources
+void LLJointRiggingInfo::merge(const LLJointRiggingInfo& other)
+{
+    if (other.mIsRiggedTo)
+    {
+        if (mIsRiggedTo)
+        {
+            // Combine existing boxes
+            update_min_max(mRiggedExtents[0], mRiggedExtents[1], other.mRiggedExtents[0]);
+            update_min_max(mRiggedExtents[0], mRiggedExtents[1], other.mRiggedExtents[1]);
+        }
+        else
+        {
+            // Initialize box
+            mIsRiggedTo = true;
+            mRiggedExtents[0] = other.mRiggedExtents[0];
+            mRiggedExtents[1] = other.mRiggedExtents[1];
+        }
+    }
+}
+
+void mergeRigInfoTab(joint_rig_info_tab& dst, const joint_rig_info_tab& src)
+{
+    // Size should be either LL_CHARACTER_MAX_ANIMATED_JOINTS, or 0 if
+    // no data. Not necessarily the same for both inputs.
+    if (src.size() > dst.size())
+    {
+        dst.resize(src.size());
+    }
+    S32 size = llmin(src.size(), dst.size());
+    for (S32 i=0; i<size; i++)
+    {
+        dst[i].merge(src[i]);
+    }
+}
diff --git a/indra/llmath/llrigginginfo.h b/indra/llmath/llrigginginfo.h
new file mode 100644
index 0000000000..18da905abb
--- /dev/null
+++ b/indra/llmath/llrigginginfo.h
@@ -0,0 +1,55 @@
+/**
+* @file llrigginginfo.h
+* @brief  Functions for tracking rigged box extents
+*
+* $LicenseInfo:firstyear=2018&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2018, 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
+* $/LicenseInfo$
+*/
+
+// Stores information related to associated rigged mesh vertices
+// This lives in llmath because llvolume lives in llmath.
+
+#ifndef	LL_LLRIGGINGINFO_H
+#define	LL_LLRIGGINGINFO_H
+
+// Extents are in joint space
+// isRiggedTo is based on the state of all currently associated rigged meshes
+class LLJointRiggingInfo
+{
+public:
+    LLJointRiggingInfo();
+    bool isRiggedTo() const;
+    void setIsRiggedTo(bool val);
+    LLVector4a *getRiggedExtents();
+    const LLVector4a *getRiggedExtents() const;
+    void merge(const LLJointRiggingInfo& other);
+private:
+	LL_ALIGN_16(LLVector4a mRiggedExtents[2]);
+    bool mIsRiggedTo;
+};
+
+// For storing all the rigging info associated with a given avatar or
+// object, keyed by joint_num.
+typedef std::vector<LLJointRiggingInfo> joint_rig_info_tab;
+
+void mergeRigInfoTab(joint_rig_info_tab& dst, const joint_rig_info_tab& src);
+
+#endif