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REVIEWED: GPU skninning on Web, some gotchas! #4412

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Ray 2024-10-24 12:25:05 +02:00
parent 670fbd8c10
commit b0140b876b
4 changed files with 43 additions and 10 deletions
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30
examples/models/resources/shaders/glsl100/skinning.vs
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@ -24,11 +24,33 @@ void main()
int boneIndex2 = int(vertexBoneIds.z);
int boneIndex3 = int(vertexBoneIds.w);
// WARNING: OpenGL ES 2.0 does not support automatic matrix transposing, neither transpose() function
mat4 boneMatrixTransposed0 = mat4(
vec4(boneMatrices[boneIndex0][0].x, boneMatrices[boneIndex0][1].x, boneMatrices[boneIndex0][2].x, boneMatrices[boneIndex0][3].x),
vec4(boneMatrices[boneIndex0][0].y, boneMatrices[boneIndex0][1].y, boneMatrices[boneIndex0][2].y, boneMatrices[boneIndex0][3].y),
vec4(boneMatrices[boneIndex0][0].z, boneMatrices[boneIndex0][1].z, boneMatrices[boneIndex0][2].z, boneMatrices[boneIndex0][3].z),
vec4(boneMatrices[boneIndex0][0].w, boneMatrices[boneIndex0][1].w, boneMatrices[boneIndex0][2].w, boneMatrices[boneIndex0][3].w));
mat4 boneMatrixTransposed1 = mat4(
vec4(boneMatrices[boneIndex1][0].x, boneMatrices[boneIndex1][1].x, boneMatrices[boneIndex1][2].x, boneMatrices[boneIndex1][3].x),
vec4(boneMatrices[boneIndex1][0].y, boneMatrices[boneIndex1][1].y, boneMatrices[boneIndex1][2].y, boneMatrices[boneIndex1][3].y),
vec4(boneMatrices[boneIndex1][0].z, boneMatrices[boneIndex1][1].z, boneMatrices[boneIndex1][2].z, boneMatrices[boneIndex1][3].z),
vec4(boneMatrices[boneIndex1][0].w, boneMatrices[boneIndex1][1].w, boneMatrices[boneIndex1][2].w, boneMatrices[boneIndex1][3].w));
mat4 boneMatrixTransposed2 = mat4(
vec4(boneMatrices[boneIndex2][0].x, boneMatrices[boneIndex2][1].x, boneMatrices[boneIndex2][2].x, boneMatrices[boneIndex2][3].x),
vec4(boneMatrices[boneIndex2][0].y, boneMatrices[boneIndex2][1].y, boneMatrices[boneIndex2][2].y, boneMatrices[boneIndex2][3].y),
vec4(boneMatrices[boneIndex2][0].z, boneMatrices[boneIndex2][1].z, boneMatrices[boneIndex2][2].z, boneMatrices[boneIndex2][3].z),
vec4(boneMatrices[boneIndex2][0].w, boneMatrices[boneIndex2][1].w, boneMatrices[boneIndex2][2].w, boneMatrices[boneIndex2][3].w));
mat4 boneMatrixTransposed3 = mat4(
vec4(boneMatrices[boneIndex3][0].x, boneMatrices[boneIndex3][1].x, boneMatrices[boneIndex3][2].x, boneMatrices[boneIndex3][3].x),
vec4(boneMatrices[boneIndex3][0].y, boneMatrices[boneIndex3][1].y, boneMatrices[boneIndex3][2].y, boneMatrices[boneIndex3][3].y),
vec4(boneMatrices[boneIndex3][0].z, boneMatrices[boneIndex3][1].z, boneMatrices[boneIndex3][2].z, boneMatrices[boneIndex3][3].z),
vec4(boneMatrices[boneIndex3][0].w, boneMatrices[boneIndex3][1].w, boneMatrices[boneIndex3][2].w, boneMatrices[boneIndex3][3].w));
vec4 skinnedPosition =
vertexBoneWeights.x*(boneMatrices[boneIndex0]*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.y*(boneMatrices[boneIndex1]*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.z*(boneMatrices[boneIndex2]*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.w*(boneMatrices[boneIndex3]*vec4(vertexPosition, 1.0));
vertexBoneWeights.x*(boneMatrixTransposed0*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.y*(boneMatrixTransposed1*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.z*(boneMatrixTransposed2*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.w*(boneMatrixTransposed3*vec4(vertexPosition, 1.0));
fragTexCoord = vertexTexCoord;
fragColor = vertexColor;