6 files changed, 17 insertions, 9 deletions
diff --git a/indra/llprimitive/CMakeLists.txt b/indra/llprimitive/CMakeLists.txt
index 8d403dc6c8..2fc40721c8 100644
--- a/indra/llprimitive/CMakeLists.txt
+++ b/indra/llprimitive/CMakeLists.txt
@@ -8,7 +8,6 @@ include(LLCommon)
 include(LLCoreHttp)
 include(LLPhysicsExtensions)
 include(LLPrimitive)
-include(GLH)
 include(GLM)
 include(TinyGLTF)
 
@@ -90,7 +89,7 @@ target_link_libraries(llprimitive
         llrender
         llphysicsextensions_impl
         ll::colladadom
-        ll::glh_linear
+        ll::glm
         )
 
 if (USESYSTEMLIBS)
diff --git a/indra/llprimitive/lldaeloader.cpp b/indra/llprimitive/lldaeloader.cpp
index 34af3ffece..7fa4230237 100644
--- a/indra/llprimitive/lldaeloader.cpp
+++ b/indra/llprimitive/lldaeloader.cpp
@@ -51,7 +51,8 @@
 #include "llsdserialize.h"
 #include "lljoint.h"
 
-#include "glh/glh_linear.h"
+#include "glm/mat4x4.hpp"
+#include "glm/gtc/type_ptr.hpp"
 #include "llmatrix4a.h"
 
 #include <boost/regex.hpp>
@@ -1216,9 +1217,9 @@ void LLDAELoader::processDomModel(LLModel* model, DAE* dae, daeElement* root, do
         mesh_scale *= normalized_transformation;
         normalized_transformation = mesh_scale;
 
-        glh::matrix4f inv_mat((F32*) normalized_transformation.mMatrix);
-        inv_mat = inv_mat.inverse();
-        LLMatrix4 inverse_normalized_transformation(inv_mat.m);
+        glm::mat4 inv_mat = glm::make_mat4((F32*)normalized_transformation.mMatrix);
+        inv_mat = glm::inverse(inv_mat);
+        LLMatrix4 inverse_normalized_transformation(glm::value_ptr(inv_mat));
 
         domSkin::domBind_shape_matrix* bind_mat = skin->getBind_shape_matrix();
 
diff --git a/indra/llprimitive/llgltfloader.cpp b/indra/llprimitive/llgltfloader.cpp
index 776f81cc01..480012699a 100644
--- a/indra/llprimitive/llgltfloader.cpp
+++ b/indra/llprimitive/llgltfloader.cpp
@@ -51,7 +51,6 @@
 #include "llsdserialize.h"
 #include "lljoint.h"
 
-#include "glh/glh_linear.h"
 #include "llmatrix4a.h"
 
 #include <boost/regex.hpp>
diff --git a/indra/llprimitive/llmodel.cpp b/indra/llprimitive/llmodel.cpp
index bcd1ee57db..d60d6cdaac 100644
--- a/indra/llprimitive/llmodel.cpp
+++ b/indra/llprimitive/llmodel.cpp
@@ -1543,6 +1543,13 @@ void LLMeshSkinInfo::fromLLSD(LLSD& skin)
         mLockScaleIfJointPosition = false;
     }
 
+    // combine mBindShapeMatrix and mInvBindMatrix into mBindPoseMatrix
+    mBindPoseMatrix.resize(mInvBindMatrix.size());
+    for (U32 i = 0; i < mInvBindMatrix.size(); ++i)
+    {
+        matMul(mBindShapeMatrix, mInvBindMatrix[i], mBindPoseMatrix[i]);
+    }
+
     updateHash();
 }
 
diff --git a/indra/llprimitive/llmodel.h b/indra/llprimitive/llmodel.h
index b9c6c9aa24..af5bbf2da8 100644
--- a/indra/llprimitive/llmodel.h
+++ b/indra/llprimitive/llmodel.h
@@ -58,12 +58,15 @@ public:
     LLUUID mMeshID;
     std::vector<std::string> mJointNames;
     mutable std::vector<S32> mJointNums;
-    typedef std::vector<LLMatrix4a, boost::alignment::aligned_allocator<LLMatrix4a, 16>> matrix_list_t;
+    typedef std::vector<LLMatrix4a> matrix_list_t;
     matrix_list_t mInvBindMatrix;
 
     // bones/joints position overrides
     matrix_list_t mAlternateBindMatrix;
 
+    // cached multiply of mBindShapeMatrix and mInvBindMatrix
+    matrix_list_t mBindPoseMatrix;
+
     LL_ALIGN_16(LLMatrix4a mBindShapeMatrix);
 
     float mPelvisOffset;
diff --git a/indra/llprimitive/llmodelloader.cpp b/indra/llprimitive/llmodelloader.cpp
index 1a64e6227f..84adec4da5 100644
--- a/indra/llprimitive/llmodelloader.cpp
+++ b/indra/llprimitive/llmodelloader.cpp
@@ -31,7 +31,6 @@
 #include "lljoint.h"
 #include "llcallbacklist.h"
 
-#include "glh/glh_linear.h"
 #include "llmatrix4a.h"
 #include <boost/bind.hpp>