1 #ifdef USE_HWSKINNING 2 3 #ifndef NUM_BONES 4 #error A required pre-processor define "NUM_BONES" is not set! 5 #endif 6 7 attribute vec4 inBoneWeight; 8 attribute vec4 inBoneIndices; 9 uniform mat4 m_BoneMatrices[NUM_BONES]; 10 11 void Skinning_Compute(inout vec4 position, inout vec4 normal){ 12 vec4 index = inBoneIndices; 13 vec4 weight = inBoneWeight; 14 15 vec4 newPos = vec4(0.0); 16 vec4 newNormal = vec4(0.0); 17 18 for (float i = 0.0; i < 4.0; i += 1.0){ 19 mat4 skinMat = m_BoneMatrices[int(index.x)]; 20 newPos += weight.x * (skinMat * position); 21 newNormal += weight.x * (skinMat * normal); 22 index = index.yzwx; 23 weight = weight.yzwx; 24 } 25 26 position = newPos; 27 normal = newNormal; 28 } 29 30 #else 31 32 void Skinning_Compute(inout vec4 position, inout vec4 normal){ 33 // skinning disabled, leave position and normal unaltered 34 } 35 36 #endif
