25 lines
634 B
GLSL
25 lines
634 B
GLSL
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// Vertex weighting/blendin shader
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// Brian Paul
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// 4 Nov 2008
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uniform mat4 mat0, mat1;
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attribute float weight;
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void main()
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{
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// simple diffuse shading
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// Note that we should really transform the normal vector along with
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// the postion below... someday.
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vec3 lightVec = vec3(0, 0, 1);
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vec3 norm = gl_NormalMatrix * gl_Normal;
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float dot = 0.2 + max(0.0, dot(norm, lightVec));
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gl_FrontColor = vec4(dot);
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// compute sum of weighted transformations
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vec4 pos0 = mat0 * gl_Vertex;
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vec4 pos1 = mat1 * gl_Vertex;
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vec4 pos = mix(pos0, pos1, weight);
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gl_Position = gl_ModelViewProjectionMatrix * pos;
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}
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