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17 lines
351 B
C
17 lines
351 B
C
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#ifndef CURV
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#define CURV
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#pragma parameter warpX "Warp X" 0.031 0.0 0.125 0.01
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#pragma parameter warpY "Warp Y" 0.041 0.0 0.125 0.01
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// Distortion of scanlines, and end of screen alpha.
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vec2 warp(vec2 pos)
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{
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pos = pos*2.0-1.0;
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pos *= vec2(1.0 + (pos.y*pos.y)*warpX, 1.0 + (pos.x*pos.x)*warpY);
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return pos*0.5 + 0.5;
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}
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#endif
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