36 lines
1.0 KiB
GLSL
36 lines
1.0 KiB
GLSL
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#version 330
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layout(location = 0) in vec3 aPosition;
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layout(location = 1) in vec3 aNormal;
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// Solid color input from application
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uniform vec3 uColor;
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// Color to output to fragment shader
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out vec4 vColor;
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out vec3 vPosition;
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out vec3 vNormal;
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// Additional uniform to allow CPU to provide mat3(transpose(inverse(uModel)))
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// + Makes a big difference in quality of diffuse shading
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// + QMatrix4x4.normalMatrix() returns a mat3 that can be used as a uniform
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uniform mat3 uModelInverseTransposed;
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// Model View Projection matrix found by P * V * M
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uniform mat4 uModel;
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uniform mat4 uView;
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uniform mat4 uProjection;
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void main()
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{
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mat4 mvp = uProjection * uView * uModel;
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gl_Position = mvp * vec4(aPosition, 1.0);
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vPosition = vec3(uModel * vec4(aPosition, 1.0f));
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vColor = vec4(uColor, 1.0f);
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vNormal = uModelInverseTransposed * aNormal;
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// vNormal = aNormal; // This is possible without the additional uniform
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// Or you could find this on the GPU using the uModel matrix
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// vNormal = mat3(transpose(inverse(uModel))) * aNormal;
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}
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