49 lines
1.1 KiB
GLSL
49 lines
1.1 KiB
GLSL
#version 430 core
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layout (points) in;
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layout (triangle_strip, max_vertices = 4) out;
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in vec2 vRad1[];
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in vec2 vRad2[];
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in float vFactor[];
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out vec2 cenPos;
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out vec2 texPos;
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out vec2 texDist;
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out float factor;
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//const float root = 1 / sqrt(2);
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const float root = 1;
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vec2 cpos = gl_in[0].gl_Position.xy;
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vec2 rad1 = vRad1[0];
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vec2 rad2 = vRad2[0];
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vec2 g(float x,float y)
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{ return vec2
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//(x,y);
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(dot(rad1-cpos,vec2(x,y)-cpos)
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,dot(rad2-cpos,vec2(x,y)-cpos)
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);
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}
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void main() {
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float factor = vFactor[0];
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cenPos = cpos;
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texPos = vec2(1,1);
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//texDist = g(root,root);
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texDist = vec2(root,root);
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gl_Position = vec4 (1,1,0,1);
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//gl_Position = vec4 (cenPos,0,1);
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EmitVertex();
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texPos = vec2(1,0);
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//texDist = g(root,-root);
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texDist = vec2(root,-root);
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gl_Position = vec4 (1,-1,0,1);
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EmitVertex();
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texPos = vec2(0,1);
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//texDist = g(-root,root);
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texDist = vec2(-root,root);
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gl_Position = vec4 (-1,1,0,1);
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EmitVertex();
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texPos = vec2(0,0);
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//texDist = g(-root,-root);
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texDist = vec2(-root,-root);
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gl_Position = vec4 (-1,-1,0,1);
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EmitVertex();
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EndPrimitive();
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}
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