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https://github.com/CookieCollective/Live-Coding-Sources.git
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121 lines
2.7 KiB
GLSL
121 lines
2.7 KiB
GLSL
#version 410 core
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uniform float fGlobalTime; // in seconds
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uniform vec2 v2Resolution; // viewport resolution (in pixels)
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uniform sampler1D texFFT; // towards 0.0 is bass / lower freq, towards 1.0 is higher / treble freq
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uniform sampler1D texFFTSmoothed; // this one has longer falloff and less harsh transients
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uniform sampler1D texFFTIntegrated; // this is continually increasing
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uniform sampler2D texChecker;
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uniform sampler2D texNoise;
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uniform sampler2D texTex1;
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uniform sampler2D texTex2;
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uniform sampler2D texTex3;
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uniform sampler2D texTex4;
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layout(location = 0) out vec4 out_color; // out_color must be written in order to see anything
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#define time fGlobalTime
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#define PI 3.1415926535
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float sph(vec3 p, float r) {
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return length(p)-r;
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}
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float cyl(vec2 p, float r) {
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return length(p)-r;
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}
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float rnd(float t) {
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return fract(sin(t*425.232)*7423.235);
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}
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mat2 rot(float a) {
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float ca=cos(a);
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float sa=sin(a);
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return mat2(ca,sa,-sa,ca);
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}
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float curve(float t, float d) {
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float g=t/d;
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return mix(rnd(floor(g)), rnd(floor(g)+1), pow(smoothstep(0,1,fract(g)),10) );
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}
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vec3 tunnel(vec3 p) {
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float t = p.z * 0.3 + curve(p.z, 2.9) + curve(p.z + 74, 0.9) * 0.2;
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p.x += sin(t) * 0.3 + (curve(p.z+42,1)-0.5)*0.5;
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p.y += sin(t*1.7 + 23)*0.4;
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p.xy *= rot(p.z*0.1+curve(time, 0.8)*10.1);
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return p;
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}
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float map(vec3 p) {
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p = tunnel(p);
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vec3 rp = vec3(atan(p.x,-p.y)*PI, length(p.xy), p.z);
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float j = 2.1 + curve(p.z, 2.9)*2;
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float t = texture(texNoise, rp.xz*vec2(0.2,1)*0.4).x;
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float a = -cyl(p.xy,j);
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float c = t + 1-cyl(p.xy, 0.9);
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return min(a, min(c, -p.y+1.4 +t*0.3));
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}
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vec3 norm(vec3 p) {
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float base=map(p);
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vec2 off=vec2(0.01,0);
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return normalize(vec3( base-map(p-off.xyy), base-map(p-off.yxy), base-map(p-off.yyx) ));
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}
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void main(void)
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{
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vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);
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uv -= 0.5;
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uv /= vec2(v2Resolution.y / v2Resolution.x, 1);
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vec3 ro = vec3(0,0,-3);
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vec3 rd = normalize(vec3(-uv, 1));
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ro.z += time * 4;
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ro = tunnel(ro);
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vec3 p = ro;
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float dd=0;
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float at = 0.0;
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for(int i=0; i<100; ++i) {
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float d = map(p);
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if(d<0.001) {
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break;
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}
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p+=rd*d*0.5;
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dd+=d * 0.5;
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at += exp(-d);
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}
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vec3 n = norm(p);
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vec3 l = normalize(vec3(-1));
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vec3 h = normalize(l-rd);
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float lum = max(0, dot(l,n));
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vec3 col = vec3(0);
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col += vec3(0.8,0.7,0.2) * lum;
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col += vec3(0.8,0.7,1.0) * 0.3 * lum * pow(max(0, dot(n,h)), 10);
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col += vec3(0.2,0.3,0.7) * 0.02 * at;
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col += vec3(1,0.5,0.3) * 0.1 * exp(dd*0.1) * (1 + curve(time+7,0.2)) * 1;
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float t1 = time + curve(time+2,.9) - length(uv) ;
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col.xy *= rot(t1);
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col.yz *= rot(t1*1.2);
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col = abs(col);
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col *= 5/dd;
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out_color = vec4(col, 1);
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} |