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59 lines
3.5 KiB
59 lines
3.5 KiB
#version 120
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#define MAX_BONE_NUM 64
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// Input vertex attributes
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attribute vec3 vertexPosition;
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attribute vec2 vertexTexCoord;
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attribute vec4 vertexColor;
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attribute vec4 vertexBoneIds;
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attribute vec4 vertexBoneWeights;
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// Input uniform values
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uniform mat4 mvp;
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uniform mat4 boneMatrices[MAX_BONE_NUM];
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// Output vertex attributes (to fragment shader)
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varying vec2 fragTexCoord;
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varying vec4 fragColor;
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void main()
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{
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int boneIndex0 = int(vertexBoneIds.x);
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int boneIndex1 = int(vertexBoneIds.y);
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int boneIndex2 = int(vertexBoneIds.z);
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int boneIndex3 = int(vertexBoneIds.w);
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// WARNING: OpenGL ES 2.0 does not support automatic matrix transposing, neither transpose() function
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mat4 boneMatrixTransposed0 = mat4(
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vec4(boneMatrices[boneIndex0][0].x, boneMatrices[boneIndex0][1].x, boneMatrices[boneIndex0][2].x, boneMatrices[boneIndex0][3].x),
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vec4(boneMatrices[boneIndex0][0].y, boneMatrices[boneIndex0][1].y, boneMatrices[boneIndex0][2].y, boneMatrices[boneIndex0][3].y),
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vec4(boneMatrices[boneIndex0][0].z, boneMatrices[boneIndex0][1].z, boneMatrices[boneIndex0][2].z, boneMatrices[boneIndex0][3].z),
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vec4(boneMatrices[boneIndex0][0].w, boneMatrices[boneIndex0][1].w, boneMatrices[boneIndex0][2].w, boneMatrices[boneIndex0][3].w));
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mat4 boneMatrixTransposed1 = mat4(
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vec4(boneMatrices[boneIndex1][0].x, boneMatrices[boneIndex1][1].x, boneMatrices[boneIndex1][2].x, boneMatrices[boneIndex1][3].x),
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vec4(boneMatrices[boneIndex1][0].y, boneMatrices[boneIndex1][1].y, boneMatrices[boneIndex1][2].y, boneMatrices[boneIndex1][3].y),
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vec4(boneMatrices[boneIndex1][0].z, boneMatrices[boneIndex1][1].z, boneMatrices[boneIndex1][2].z, boneMatrices[boneIndex1][3].z),
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vec4(boneMatrices[boneIndex1][0].w, boneMatrices[boneIndex1][1].w, boneMatrices[boneIndex1][2].w, boneMatrices[boneIndex1][3].w));
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mat4 boneMatrixTransposed2 = mat4(
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vec4(boneMatrices[boneIndex2][0].x, boneMatrices[boneIndex2][1].x, boneMatrices[boneIndex2][2].x, boneMatrices[boneIndex2][3].x),
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vec4(boneMatrices[boneIndex2][0].y, boneMatrices[boneIndex2][1].y, boneMatrices[boneIndex2][2].y, boneMatrices[boneIndex2][3].y),
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vec4(boneMatrices[boneIndex2][0].z, boneMatrices[boneIndex2][1].z, boneMatrices[boneIndex2][2].z, boneMatrices[boneIndex2][3].z),
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vec4(boneMatrices[boneIndex2][0].w, boneMatrices[boneIndex2][1].w, boneMatrices[boneIndex2][2].w, boneMatrices[boneIndex2][3].w));
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mat4 boneMatrixTransposed3 = mat4(
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vec4(boneMatrices[boneIndex3][0].x, boneMatrices[boneIndex3][1].x, boneMatrices[boneIndex3][2].x, boneMatrices[boneIndex3][3].x),
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vec4(boneMatrices[boneIndex3][0].y, boneMatrices[boneIndex3][1].y, boneMatrices[boneIndex3][2].y, boneMatrices[boneIndex3][3].y),
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vec4(boneMatrices[boneIndex3][0].z, boneMatrices[boneIndex3][1].z, boneMatrices[boneIndex3][2].z, boneMatrices[boneIndex3][3].z),
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vec4(boneMatrices[boneIndex3][0].w, boneMatrices[boneIndex3][1].w, boneMatrices[boneIndex3][2].w, boneMatrices[boneIndex3][3].w));
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vec4 skinnedPosition =
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vertexBoneWeights.x*(boneMatrixTransposed0*vec4(vertexPosition, 1.0)) +
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vertexBoneWeights.y*(boneMatrixTransposed1*vec4(vertexPosition, 1.0)) +
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vertexBoneWeights.z*(boneMatrixTransposed2*vec4(vertexPosition, 1.0)) +
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vertexBoneWeights.w*(boneMatrixTransposed3*vec4(vertexPosition, 1.0));
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fragTexCoord = vertexTexCoord;
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fragColor = vertexColor;
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gl_Position = mvp*skinnedPosition;
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}
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