2020-04-13 09:32:59 +02:00
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varying float elapsed_time;
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void vertex() {
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elapsed_time = TIME;
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}
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2020-06-27 09:37:28 +02:00
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//---
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2018-07-28 09:37:51 +02:00
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float rand(vec2 x) {
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2021-02-08 21:06:26 +01:00
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return fract(cos(mod(dot(x, vec2(13.9898, 8.141)), 3.14)) * 43758.5453);
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2018-07-22 17:20:27 +02:00
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}
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2018-07-28 09:37:51 +02:00
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vec2 rand2(vec2 x) {
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2021-02-08 21:06:26 +01:00
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return fract(cos(mod(vec2(dot(x, vec2(13.9898, 8.141)),
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dot(x, vec2(3.4562, 17.398))), vec2(3.14))) * 43758.5453);
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2018-07-22 17:20:27 +02:00
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}
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2018-07-28 09:37:51 +02:00
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vec3 rand3(vec2 x) {
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2021-02-08 21:06:26 +01:00
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return fract(cos(mod(vec3(dot(x, vec2(13.9898, 8.141)),
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dot(x, vec2(3.4562, 17.398)),
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dot(x, vec2(13.254, 5.867))), vec3(3.14))) * 43758.5453);
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2018-07-22 17:20:27 +02:00
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}
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2018-08-26 16:31:29 +02:00
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vec3 rgb2hsv(vec3 c) {
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vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
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vec4 p = c.g < c.b ? vec4(c.bg, K.wz) : vec4(c.gb, K.xy);
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vec4 q = c.r < p.x ? vec4(p.xyw, c.r) : vec4(c.r, p.yzx);
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float d = q.x - min(q.w, q.y);
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float e = 1.0e-10;
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return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
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}
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vec3 hsv2rgb(vec3 c) {
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vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
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return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
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}
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