62 lines
1.5 KiB
GLSL
62 lines
1.5 KiB
GLSL
#version 450
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// Name: Remember
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// Author: diatribes
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// URL: https://www.shadertoy.com/view/tXSBDK
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layout(location = 0) in vec2 vUV;
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layout(location = 0) out vec4 FragColor;
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layout(set = 3, binding = 0) uniform ShadertoyUBO {
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float iTime;
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vec2 iResolution;
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};
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// fuzzy brain — Hash function to replace iChannel0 texture noise
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float hash12(vec2 p) {
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vec3 p3 = fract(vec3(p.xyx) * .1031);
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p3 += dot(p3, p3.yzx + 33.33);
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return fract((p3.x + p3.y) * p3.z);
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}
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void mainImage(out vec4 o, vec2 u) {
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vec3 q, p = vec3(iResolution.xy, iResolution.x / iResolution.y);
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float i = 0.0, s,
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d = .125 * hash12(u),
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t = iTime * .1;
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u = (u + u - p.xy) / p.y;
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if (abs(u.y) > .8) { o = vec4(0); return; }
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o = vec4(0.0);
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for (; i < 64.; i++) {
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q = p = vec3(u * d, d + t * 5.);
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p.xy *= mat2(cos(.1 * p.z + .1 * t + vec4(0, 33, 11, 0)));
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q.xz = cos(q.xz);
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p.z = cos(p.z);
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for (s = 1.; s++ < 6.;
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q += sin(.6 * t + p.zxy * .6),
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p += sin(t + t + p.yzx * s) * .6);
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d += s = .02 + abs(min(length(p + 3. * sin(p.z * .5)) - 4., length(q - 2. * sin(p.z * .4)) - 6.)) * .2;
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vec4 brightTerm = min(.01 * vec4(6, 2, 1, 0) / max(length(u * sin(t + t + t)), 0.001), vec4(50.0));
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o += brightTerm + 1. / s * length(u);
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}
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o = tanh(max(o / 6e2 + dot(u, u) * .35, 0.));
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}
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void main() {
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vec2 fragCoordPixels = vUV * iResolution;
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vec4 outColor;
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mainImage(outColor, fragCoordPixels);
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FragColor = outColor;
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}
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