23 lines
448 B
GLSL
23 lines
448 B
GLSL
#version 440
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layout( location = 0 ) in vec4 vertexCoord;
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layout( location = 0 ) out float colorIndex;
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layout( std140, binding = 0 ) uniform buf
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{
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mat4 matrix;
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vec4 vector;
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float opacity;
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} ubuf;
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out gl_PerVertex { vec4 gl_Position; };
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void main()
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{
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vec2 pos = vertexCoord.xy - ubuf.vector.xy;
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vec2 span = ubuf.vector.zw;
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colorIndex = dot( pos, span ) / dot( span, span );
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gl_Position = ubuf.matrix * vertexCoord;
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}
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