28 lines
772 B
GLSL
28 lines
772 B
GLSL
#version 450 core
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struct DataS { vec2 pos; vec2 rad1; vec2 rad2; };
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layout (std430, binding = 9) readonly buffer Data { DataS data[]; };
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layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
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out vec2 texPos;
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out vec2 distmask;
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const int ks[6] =
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{0,1,2 // 2--3
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,2,1,3 // | |
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}; // 0--1
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const vec2 cs[4] =
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{ vec2 (-1,-1)
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, vec2 ( 1,-1)
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, vec2 (-1, 1)
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, vec2 ( 1, 1)
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};
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void main()
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{
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int k = ks[gl_VertexID];
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vec4 off = (theMat * vec4(data[gl_VertexID/6].pos, 0,1));
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float r = distance
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((theMat * vec4(data[gl_VertexID/6].rad1, 0,1)).xy
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,(theMat * vec4(0,0, 0,1)).xy);
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distmask = (cs[k] - off.xy)/r;
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texPos = 0.5 * (cs[k]+vec2(1,1));
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gl_Position = vec4 (cs[k],0,1);
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}
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