26 lines
569 B
GLSL
26 lines
569 B
GLSL
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// -*-C++-*-
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// Shader that uses OpenGL state values to do per-pixel lighting
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uniform float size;
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varying vec3 relPos;
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varying vec2 rawPos;
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varying float pixelSize;
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void main()
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{
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gl_FrontColor= gl_Color;
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gl_Position = ftransform();
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vec4 ep = gl_ModelViewMatrixInverse * vec4(0.0,0.0,0.0,1.0);
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relPos = gl_Vertex.xyz - ep.xyz;
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rawPos = gl_Vertex.xy;
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float dist = length(relPos);
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float lightScale = size * size * size * size * size / 1000.0;
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pixelSize = min(size * size/25.0,lightScale/dist);
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gl_PointSize = 2.0 * pixelSize;
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}
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