19 lines
585 B
Plaintext
19 lines
585 B
Plaintext
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#if defined( DITHERING )
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// based on https://www.shadertoy.com/view/MslGR8
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vec3 dithering( vec3 color ) {
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//Calculate grid position
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float grid_position = rand( gl_FragCoord.xy );
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//Shift the individual colors differently, thus making it even harder to see the dithering pattern
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vec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );
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//modify shift acording to grid position.
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dither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );
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//shift the color by dither_shift
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return color + dither_shift_RGB;
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}
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#endif
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