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Transform the vertex normals by the animated matrix (#4646)

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Jeffery Myers 2024-12-28 16:07:52 -08:00 • committed by GitHub
parent c0f2067dba
commit f355d6f1db
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1 changed files with 13 additions and 1 deletions
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12
examples/models/resources/shaders/glsl330/skinning.vs
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@ -6,16 +6,19 @@
in vec3 vertexPosition;
in vec2 vertexTexCoord;
in vec4 vertexColor;
in vec3 vertexNormal;
in vec4 vertexBoneIds;
in vec4 vertexBoneWeights;
// Input uniform values
uniform mat4 mvp;
uniform mat4 matNormal;
uniform mat4 boneMatrices[MAX_BONE_NUM];
// Output vertex attributes (to fragment shader)
out vec2 fragTexCoord;
out vec4 fragColor;
out vec3 fragNormal;
void main()
{
@ -30,8 +33,17 @@ void main()
vertexBoneWeights.z*(boneMatrices[boneIndex2]*vec4(vertexPosition, 1.0)) +
vertexBoneWeights.w*(boneMatrices[boneIndex3]*vec4(vertexPosition, 1.0));
vec4 skinnedNormal =
vertexBoneWeights.x*(boneMatrices[boneIndex0]*vec4(vertexNormal, 0.0)) +
vertexBoneWeights.y*(boneMatrices[boneIndex1]*vec4(vertexNormal, 0.0)) +
vertexBoneWeights.z*(boneMatrices[boneIndex2]*vec4(vertexNormal, 0.0)) +
vertexBoneWeights.w*(boneMatrices[boneIndex3]*vec4(vertexNormal, 0.0));
skinnedNormal.w = 0.0;
fragTexCoord = vertexTexCoord;
fragColor = vertexColor;
fragNormal = normalize(vec3(matNormal*skinnedNormal));
gl_Position = mvp*skinnedPosition;
}