31 lines
753 B
Text
31 lines
753 B
Text
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/* https://www.shadertoy.com/view/XsX3zB
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*
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* The MIT License
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* Copyright © 2013 Nikita Miropolskiy
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*
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* ( license has been changed from CCA-NC-SA 3.0 to MIT
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*
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* but thanks for attributing your source code when deriving from this sample
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* with a following link: https://www.shadertoy.com/view/XsX3zB )
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*
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*/
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/* discontinuous pseudorandom uniformly distributed in [-0.5, +0.5]^3 */
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vec3 random3(vec3 c) {
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float j = 4096.0*sin(dot(c,vec3(17.0, 59.4, 15.0)));
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vec3 r;
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r.z = fract(512.0*j);
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j *= .125;
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r.x = fract(512.0*j);
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j *= .125;
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r.y = fract(512.0*j);
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return r-0.5;
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}
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// https://godotshaders.com/snippet/random-value/
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float random2(vec2 uv) {
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return fract(sin(dot(uv.xy,
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vec2(12.9898,78.233))) * 43758.5453123);
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}
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