26 lines
505 B
GLSL
26 lines
505 B
GLSL
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uniform sampler2D warpx;
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uniform sampler2D warpy;
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float decdepth(vec4 rgba) {
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return dot(rgba, vec4(1.0, 1.0/255.0, 1.0/65025.0, 1.0/16581375.0));
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}
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void main()
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{
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vec4 pos = ftransform();
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gl_TexCoord[0] = gl_MultiTexCoord0;
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vec2 tc = pos.xy * vec2(0.5) + vec2(0.5);
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float movex = decdepth(texture2D(warpx, tc));
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float movey = decdepth(texture2D(warpy, tc));
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float dx = movex * 2.0 - 1.0;
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float dy = movey * 2.0 - 1.0;
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dx *= 2.0;
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dy *= 2.0;
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gl_Position = pos + vec4(dx, dy, vec2(0.0));
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}
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