20 lines
794 B
GLSL
20 lines
794 B
GLSL
#version 130
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// Passed in from the vertex shader
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in vec4 worldPosition;
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in vec3 worldNormal;
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// the color that gets written to the display
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out vec4 outputColor;
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void main()
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{
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// Again, for the purposes of these examples we cannot be sure that per-vertex normals are provided. A sensible fallback
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// is to use this little trick to compute per-fragment flat-shaded normals from the world positions using derivative operations.
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vec3 normal = normalize(cross(dFdy(worldPosition.xyz), dFdx(worldPosition.xyz)));
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// We are just using the normal as the output color, and making it lighter so it looks a bit nicer.
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// Obviously a real shader would also do texuring, lighting, or whatever is required for the application.
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outputColor = vec4(abs(worldNormal.xyz), 1.0);
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}
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