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34 lines
976 B
34 lines
976 B
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#iChannel0 "file://./Textures/colorful.jpg"
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#iChannel0::WrapMode "Mirror"
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#iChannel1 "file://./Textures/palette_LUT_opt.png"
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#iChannel1::MinFilter "Nearest"
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#iChannel1::MagFilter "Nearest"
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#iChannel1::WrapMode "Mirror"
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#define S(a,b,c) smoothstep(a,b,c)
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float map(float value, float min1, float max1, float min2, float max2) {
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return min2 + (value - min1) * (max2 - min2) / (max1 - min1);
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}
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void mainImage ( out vec4 fragColor, in vec2 fragCoord) {
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vec2 uv = (fragCoord/iResolution.y);
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vec4 col = vec4(0,0,0,1.0);
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vec3 texCol = texture(iChannel0, uv).rgb;
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vec2 coords;
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coords.x = texCol.r;
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//float g = floor(map(texCol.g, 0., 1., 0., 63.));
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//float b = floor(map(texCol.b, 0., 1., 0., 63.));
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//coords.y = map(g+b*64., 0., 4095., 0., 1.);
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coords.y = (texCol.g*63.+floor(texCol.b*63.)*64.)/(4095.);
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vec3 tmp = texture(iChannel1, coords).rgb;
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col.rgb = tmp;
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fragColor = col;
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}
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