27 lines
564 B
GLSL
27 lines
564 B
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 vec4 vBackPoss[];
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uniform vec2 lightPos;
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void main()
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{
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vec2 posa = gl_in[0].gl_Position.xy;
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vec2 posb = gl_in[0].gl_Position.zw;
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vec2 v = normalize( posb - posa);
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vec2 off = vec2( -(v.y *0.2)
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, v.x *0.2 );
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gl_Position = vec4 (posa, 0 , 1);
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EmitVertex();
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gl_Position = vec4 (posb, 0 , 1);
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EmitVertex();
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gl_Position = vec4 (posa + off, 0 , 1);
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EmitVertex();
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gl_Position = vec4 (posb + off, 0 , 1);
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EmitVertex();
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EndPrimitive();
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}
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