From a3912f1cf39ec16fccf16d607407ad30f7e420ea Mon Sep 17 00:00:00 2001
From: shadowisLORD <shadowisLORD@75d07b2b-3a1a-0410-a2c5-0572b91ccdca>
Date: Mon, 27 May 2013 21:29:35 +0000
Subject: [PATCH]  * Fixed bug where verts uninfluenced by bones would not work
 correctly in hardware skinning

git-svn-id: http://jmonkeyengine.googlecode.com/svn/trunk@10633 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
---
 .../core-data/Common/ShaderLib/Skinning.glsllib    | 72 ++++++++++++----------
 1 file changed, 39 insertions(+), 33 deletions(-)

diff --git a/engine/src/core-data/Common/ShaderLib/Skinning.glsllib b/engine/src/core-data/Common/ShaderLib/Skinning.glsllib
index 6452b34b0..399e9e3fb 100644
--- a/engine/src/core-data/Common/ShaderLib/Skinning.glsllib
+++ b/engine/src/core-data/Common/ShaderLib/Skinning.glsllib
@@ -11,56 +11,62 @@ attribute vec4 inBoneIndex;
 uniform mat4 m_BoneMatrices[NUM_BONES];
  
 void Skinning_Compute(inout vec4 position){
+    if (inBoneWeight.x != 0.0) {
 #if NUM_WEIGHTS_PER_VERT == 1
-    position = m_BoneMatrices[int(inBoneIndex.x)] * position;
+        position = m_BoneMatrices[int(inBoneIndex.x)] * position;
 #else
-    mat4 mat = mat4(0.0);
-    mat += m_BoneMatrices[int(inBoneIndex.x)] * inBoneWeight.x;
-    mat += m_BoneMatrices[int(inBoneIndex.y)] * inBoneWeight.y;
-    mat += m_BoneMatrices[int(inBoneIndex.z)] * inBoneWeight.z;
-    mat += m_BoneMatrices[int(inBoneIndex.w)] * inBoneWeight.w;
-    position = mat * position;
+        mat4 mat = mat4(0.0);
+        mat += m_BoneMatrices[int(inBoneIndex.x)] * inBoneWeight.x;
+        mat += m_BoneMatrices[int(inBoneIndex.y)] * inBoneWeight.y;
+        mat += m_BoneMatrices[int(inBoneIndex.z)] * inBoneWeight.z;
+        mat += m_BoneMatrices[int(inBoneIndex.w)] * inBoneWeight.w;
+        position = mat * position;
 #endif
+    }
 }
  
 void Skinning_Compute(inout vec4 position, inout vec3 normal){
+    if (inBoneWeight.x != 0.0) {
 #if NUM_WEIGHTS_PER_VERT == 1
-    position = m_BoneMatrices[int(inBoneIndex.x)] * position;
-    normal = (mat3(m_BoneMatrices[int(inBoneIndex.x)][0].xyz,
-                   m_BoneMatrices[int(inBoneIndex.x)][1].xyz,
-                   m_BoneMatrices[int(inBoneIndex.x)][2].xyz) * normal);
+        position = m_BoneMatrices[int(inBoneIndex.x)] * position;
+        normal = (mat3(m_BoneMatrices[int(inBoneIndex.x)][0].xyz,
+                       m_BoneMatrices[int(inBoneIndex.x)][1].xyz,
+                       m_BoneMatrices[int(inBoneIndex.x)][2].xyz) * normal);
 #else
-    mat4 mat = mat4(0.0);
-    mat += m_BoneMatrices[int(inBoneIndex.x)] * inBoneWeight.x;
-    mat += m_BoneMatrices[int(inBoneIndex.y)] * inBoneWeight.y;
-    mat += m_BoneMatrices[int(inBoneIndex.z)] * inBoneWeight.z;
-    mat += m_BoneMatrices[int(inBoneIndex.w)] * inBoneWeight.w;
-    position = mat * position;
+        mat4 mat = mat4(0.0);
+        mat += m_BoneMatrices[int(inBoneIndex.x)] * inBoneWeight.x;
+        mat += m_BoneMatrices[int(inBoneIndex.y)] * inBoneWeight.y;
+        mat += m_BoneMatrices[int(inBoneIndex.z)] * inBoneWeight.z;
+        mat += m_BoneMatrices[int(inBoneIndex.w)] * inBoneWeight.w;
+        position = mat * position;
 
-    mat3 rotMat = mat3(mat[0].xyz, mat[1].xyz, mat[2].xyz);
-    normal = rotMat * normal;
+        mat3 rotMat = mat3(mat[0].xyz, mat[1].xyz, mat[2].xyz);
+        normal = rotMat * normal;
 #endif
+    }
 }
  
 void Skinning_Compute(inout vec4 position, inout vec3 tangent, inout vec3 normal){
+    if (inBoneWeight.x != 0.0) {
 #if NUM_WEIGHTS_PER_VERT == 1
-    position = m_BoneMatrices[int(inBoneIndex.x)] * position;
-    tangent = m_BoneMatrices[int(inBoneIndex.x)] * tangent;
-    normal = (mat3(m_BoneMatrices[int(inBoneIndex.x)][0].xyz,
-                   m_BoneMatrices[int(inBoneIndex.x)][1].xyz,
-                   m_BoneMatrices[int(inBoneIndex.x)][2].xyz) * normal);
+        position = m_BoneMatrices[int(inBoneIndex.x)] * position;
+        tangent = m_BoneMatrices[int(inBoneIndex.x)] * tangent;
+        normal = (mat3(m_BoneMatrices[int(inBoneIndex.x)][0].xyz,
+                       m_BoneMatrices[int(inBoneIndex.x)][1].xyz,
+                       m_BoneMatrices[int(inBoneIndex.x)][2].xyz) * normal);
 #else
-    mat4 mat = mat4(0.0);
-    mat += m_BoneMatrices[int(inBoneIndex.x)] * inBoneWeight.x;
-    mat += m_BoneMatrices[int(inBoneIndex.y)] * inBoneWeight.y;
-    mat += m_BoneMatrices[int(inBoneIndex.z)] * inBoneWeight.z;
-    mat += m_BoneMatrices[int(inBoneIndex.w)] * inBoneWeight.w;
-    position = mat * position;
+        mat4 mat = mat4(0.0);
+        mat += m_BoneMatrices[int(inBoneIndex.x)] * inBoneWeight.x;
+        mat += m_BoneMatrices[int(inBoneIndex.y)] * inBoneWeight.y;
+        mat += m_BoneMatrices[int(inBoneIndex.z)] * inBoneWeight.z;
+        mat += m_BoneMatrices[int(inBoneIndex.w)] * inBoneWeight.w;
+        position = mat * position;
 
-    mat3 rotMat = mat3(mat[0].xyz, mat[1].xyz, mat[2].xyz);
-    tangent = rotMat * tangent;
-    normal = rotMat * normal;
+        mat3 rotMat = mat3(mat[0].xyz, mat[1].xyz, mat[2].xyz);
+        tangent = rotMat * tangent;
+        normal = rotMat * normal;
 #endif
+    }
 }
 
 #endif
\ No newline at end of file
-- 
2.11.0