mirror of
https://gitlab.com/MaddoScientisto/cirnogodot.git
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23 lines
1 KiB
Text
23 lines
1 KiB
Text
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group_uniforms color_hsv_shift;
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uniform float h_shift: hint_range(0.0, 360.0) = 180;
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uniform float s_shift: hint_range(0.0, 2.) = 1.;
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uniform float v_shift: hint_range(0.0, 2.) = 1.;
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group_uniforms;
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vec3 hsv_shift(vec3 color)
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{
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vec3 result_hsv = vec3(color.rgb);
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float cos_hsv = v_shift * s_shift * cos(h_shift * PI / 180.);
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float sin_hsv = v_shift * s_shift * sin(h_shift * PI / 180.);
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result_hsv.x = (.299 * v_shift + .701 * cos_hsv + .168 * sin_hsv) * color.x
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+ (.587 * v_shift - .587 * cos_hsv + .330 * sin_hsv) * color.y
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+ (.114 * v_shift - .114 * cos_hsv - .497 * sin_hsv) * color.z;
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result_hsv.y = (.299 * v_shift - .299 * cos_hsv - .328 * sin_hsv) *color.x
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+ (.587 * v_shift + .413 * cos_hsv + .035 * sin_hsv) * color.y
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+ (.114 * v_shift - .114 * cos_hsv + .292 * sin_hsv) * color.z;
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result_hsv.z = (.299 * v_shift - .3 * cos_hsv + 1.25 * sin_hsv) * color.x
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+ (.587 * v_shift - .588 * cos_hsv - 1.05 * sin_hsv) * color.y
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+ (.114 * v_shift + .886 * cos_hsv - .203 * sin_hsv) * color.z;
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color.rgb = result_hsv;
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return color.rgb;
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}
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