29 lines
700 B
GLSL
29 lines
700 B
GLSL
varying vec2 samplePos1;
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varying vec2 samplePos2;
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varying vec2 samplePos3;
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varying vec2 samplePos4;
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varying vec2 samplePos5;
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uniform float textureWidth;
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uniform float textureHeight;
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attribute float xBlur;
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attribute float yBlur;
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vec2 mkSamplePos(vec2 origin, float offset)
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{
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vec2 foo = origin + vec2(xBlur, yBlur) * offset;
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return vec2(foo.x / textureWidth, 1.0 - foo.y / textureHeight);
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}
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void main()
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{
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samplePos1 = mkSamplePos(gl_Vertex.xy, 0.0);
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samplePos2 = mkSamplePos(gl_Vertex.xy, -1.5);
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samplePos3 = mkSamplePos(gl_Vertex.xy, 1.5);
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samplePos4 = mkSamplePos(gl_Vertex.xy, 3.5);
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samplePos5 = mkSamplePos(gl_Vertex.xy, -3.5);
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gl_Position = ftransform();
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}
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