Add 2018-05-25

2018-05-25/01-leon.frag

@@ -0,0 +1,96 @@
+
+precision mediump float;
+
+uniform float time;
+uniform vec2 resolution;
+
+#define repeat(p,r) (mod(p+r/2.,r)-r/2.)
+
+float sdSphere (vec3 p, float r) { return length(p) - r; }
+
+mat2 rot (float a) { float c = cos(a), s = sin(a); return mat2(c,-s,s,c); }
+
+float smin (float a, float b, float r) {
+  float h = clamp(.5+.5*(b-a)/r, 0., 1.);
+  return mix(b, a, h)-r*h*(1.-h);
+}
+
+void amod (inout vec2 p, float c) {
+  float an = (3.1459*2.)/c;
+  float a = atan(p.y,p.x)+an/2.;
+  a = mod(a, an) - an/2.;
+  p = vec2(cos(a), sin(a)) * length(p);
+}
+
+float map (vec3 pos) {
+  float scene = 1000.;
+vec3 pp = pos;
+    pos.xz *= rot(time*.09554);
+    // pos.xz *= rot(pos.y * .5 + time);
+    pos.yz *= rot(time*.62468);
+    float smoo = .01;
+    const float count = 5.;
+  for (float i = count; i > 0.; --i) {
+    float r = i / count;
+    r = r * r;
+  pos = abs(pos) - 1.5 * r;
+      pos.xz *= rot(time*.94645);
+      pos.yz *= rot(time*.56546);
+      pos.xy *= rot(time*.31546);
+  vec3 p = pos;
+  // p.y = repeat(p.y + time, .4);
+  scene = smin(scene, sdSphere(p, .1), smoo);
+  // scene = smin(scene, max(abs(p.y)-.01, length(p.xz) - .1), smoo);
+  scene = min(scene, length(p.yz) - .02);
+  // scene = min(scene, length(p.yx) - .1);
+}
+scene = max(scene, -sdSphere(pp, 3.));
+float d = length(pp);
+vec3 p = pp;
+pp.xz *= rot(-time*1.798+d);
+pp.yz *= rot(-time*1.698+d);
+pp.yx *= rot(-time*1.398+d);
+scene = min(scene, length(pp.xz)-.1*d);
+scene = min(scene, length(pp.yz)-.1*d);
+scene = min(scene, length(pp.yx)-.1*d);
+pp = p;
+pp.xz *= rot(pp.y + time / 4.);
+pp.y = repeat(pp.y + time, .5);
+amod(pp.xz, 5.);
+pp.x -= 1. + .5 * sin(p.y + time / 2.);
+scene = min(scene, sdSphere(pp, .1));
+scene = min(scene, length(pp.zy)- .02);
+
+
+  return scene;
+}
+
+vec3 lookAt (vec3 eye, vec3 at, vec2 uv) {
+  vec3 forward = normalize(at - eye);
+  vec3 right = normalize(cross(forward, vec3(0,1,0)));
+  vec3 up = normalize(cross(right, forward));
+  return normalize(forward * .3 + right * uv.x + up * uv.y);
+}
+
+void main () {
+  vec2 uv = (gl_FragCoord.xy-.5*resolution.xy)/resolution.y;
+  vec3 eye = vec3(0,0,-2.+.5*sin(time*4.));
+  vec3 ray = lookAt(eye, vec3(0), uv);
+  vec3 pos = eye;
+  float shade = 0.;
+  for (float i = 0.; i <= 1.; i += 1./100.) {
+    float dist = map(pos);
+    if (dist < .001) {
+      shade = 1.-i;
+      break;
+    }
+    // if (shade >= 1.) break;
+    // dist = max(.05, dist);
+    pos += dist * ray;
+  }
+  vec3 color = vec3(1.);
+  vec3 t = vec3(.1,.2,.3) * time + length(pos) / 2. + shade * 8.;
+  color = vec3(.5)+vec3(.5)*cos(t);
+  color *= shade;
+  gl_FragColor = vec4(color, 1);
+}

2018-05-25/02-antoine.glsl

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+#version 410 core
+
+uniform float fGlobalTime; // in seconds
+uniform vec2 v2Resolution; // viewport resolution (in pixels)
+
+uniform sampler1D texFFT; // towards 0.0 is bass / lower freq, towards 1.0 is higher / treble freq
+uniform sampler1D texFFTSmoothed; // this one has longer falloff and less harsh transients
+uniform sampler1D texFFTIntegrated; // this is continually increasing
+uniform sampler2D texChecker;
+uniform sampler2D texKC;
+uniform sampler2D texNoise;
+uniform sampler2D texPegasus;
+uniform sampler2D texTex1;
+uniform sampler2D texTex2;
+uniform sampler2D texTex3;
+uniform sampler2D texTex4;
+
+layout(location = 0) out vec4 out_color; // out_color must be written in order to see anything
+
+vec4 plas( vec2 v, float time )
+{
+  float c = 0.5 + sin( v.x * 10.0 ) + cos( sin( time + v.y ) * 20.0 );
+  return vec4( sin(c * 0.2 + cos(time)), c * 0.15, cos( c * 0.1 + time / .4 ) * .25, 1.0 );
+}
+
+#define time fGlobalTime
+
+float sph(vec3 p, float r) {
+
+  return length(p)-r;
+}
+
+float cyl(vec2 p, float r) {
+  return length(p)-r;
+}
+
+mat2 rot(float a) {
+  float co=cos(a);
+  float so = sin(a);
+  return mat2(co,so,-so,co);
+}
+
+vec3 rep(vec3 p, vec3 s) {
+
+  return (fract(p/s+.5)-0.5)*s;
+
+}
+
+float map(vec3 p, inout float v) {
+
+  vec3 r1 = rep(p, vec3(10.0));
+
+  
+
+  float d = sph(r1, 0.5);
+
+  d = max(d, -cyl(p.xy,0.3));
+
+  for(int i=0; i<13; ++i) {
+
+    float a = i * sin(time + cos(time)*0.3);
+     float j = sin( time*0.1)*1.0;
+    vec3 l =p + vec3(cos(a)*j,sin(a)*j, 0.2);
+    vec3 k =l;
+    k.xz *= rot(time*0.1);
+
+    d = min(d, sph(k,0.0));
+  
+  }
+
+  v = 0.0;
+
+  for(int i=0; i<13; ++i) {
+  
+    vec3 r2 = rep(p, vec3(5.0));
+    vec3 sp = r2 + vec3(sin(time),0,0);
+    sp.xy *= rot(0.3 * sin(time*i + i *1243.5467));
+    sp.yz *= rot(0.3 * sin(time*0.3*i + i *1243.5467));
+    d = min(d, cyl(sp.xz,0.1));
+
+    
+
+  }
+
+
+  return d;
+
+}
+
+vec3 norm(vec3 p) {
+
+
+  float v=0.0;
+  float base = map(p,v);
+  vec2 off = vec2(0.0,0.01);
+  
+  return normalize(vec3(base-map(p-off.yxx,v),base-map(p-off.xyx,v),base-map(p-off.xxy,v)));
+
+}
+
+vec3 march(vec3 ro, vec3 rd) {
+
+  vec3 col = vec3(0.0);
+
+  float e=0.0;
+  vec3 p = ro;
+  for(int i=0;i<200; ++i) {
+
+    float v = 0.0;
+    float d = map(p,v);
+
+    if(d<0.0001) {
+
+      vec3 n = norm(p);
+      float lum = dot(n, normalize(-vec3(0.7)))*0.8+0.2;
+      float depth = length(p-ro);
+      col = vec3(10.0/(depth));
+
+      break;
+    }
+
+    e += 0.0001/d;
+  
+    p+=d*rd;
+  }
+
+  col += e * vec3(0.0,0.2,1.0);;
+
+  return col;
+}
+
+void main(void)
+{
+  vec2 uv = vec2(2.0*gl_FragCoord.x / v2Resolution.x - 1.0, 1.0-2.0*gl_FragCoord.y / v2Resolution.y);
+  uv.y *= v2Resolution.y / v2Resolution.x;
+
+  vec3 ro = vec3(0,0,-3);
+  vec3 rd = normalize(vec3(uv, 1.0));
+  vec3 col = march(ro,rd);
+
+
+
+  out_color = vec4(col, 1.0);
+}

2018-05-25/02-lamogui.glsl

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+#version 410 core
+
+uniform float fGlobalTime; // in seconds
+uniform vec2 v2Resolution; // viewport resolution (in pixels)
+
+uniform sampler1D texFFT; // towards 0.0 is bass / lower freq, towards 1.0 is higher / treble freq
+uniform sampler1D texFFTSmoothed; // this one has longer falloff and less harsh transients
+uniform sampler1D texFFTIntegrated; // this is continually increasing
+uniform sampler2D texChecker;
+uniform sampler2D texNoise;
+uniform sampler2D texTex1;
+uniform sampler2D texTex2;
+uniform sampler2D texTex3;
+uniform sampler2D texTex4;
+
+layout(location = 0) out vec4 out_color; // out_color must be written in order to see anything
+
+float bass;
+
+float megabass()
+{
+  float b = 0.0;
+  for (int i = 0; i < 16; i++)
+    b = max(texelFetch(texFFTIntegrated, i, 0).x, b);
+  return b;
+}
+
+float cyl(vec3 p, float r, float h)
+{
+  return max(length(p.xz) - r, abs(p.y) - h);
+}
+
+float bou(vec3 p)
+{
+  float d = cyl(p, 0.5, 0.5);
+  return min(d, cyl(p - vec3(0.0, 0.8, 0.0), 0.2, 0.3));
+}
+
+mat2 rot(float a)
+{
+  float c = cos(a);
+  float s = sin(a);
+  return mat2(c, s, -s, c);
+}
+
+int prout;
+
+float map(vec3 p)
+{
+  vec3 per = vec3(3.0);
+  ivec3 id = ivec3(p/per);
+  vec3 q = mod(p, per) - 0.5 * per;
+  q .y += 0.5 * sin(float(p.z));
+  q.xy *= rot(float(id.x * 0.2561 + id.y + id.z) + bass);
+  q.yz *= rot(float(id.x * 0.2561 + id.y + id.z) + bass);
+
+  prout = id.x + id.y +id.z;
+  float d = bou(q); 
+
+  return d;
+}
+
+vec3 grad(vec3 p)
+{
+  vec2 e = vec2(0.001, 0.0);
+  return normalize(vec3(map(p+e.xyy) - map(p-e.xyy), map(p+e.yxy) - map(p-e.yxy), map(p+e.yyx) - map(p-e.yyx)));
+}
+
+vec3 rm(vec3 ro, vec3 rd)
+{
+  vec3 p = ro;
+   for (int i = 0; i < 364; ++i)
+    {
+    float d = map(p);
+    if (abs(d) < 0.01)
+    {
+      break;
+    }
+    p += rd * 0.9 * d;
+  }
+  return p;
+}
+
+vec3 shade(vec3 p,  vec3 ro, vec3 n)
+{
+  return vec3(exp(-distance(ro, p) * 0.1)) * vec3(cos(float(prout) + bass * 0.1), sin(float(prout) + bass * 0.1), 1.0); //* (n * 0.5 + 0.5);
+}
+
+void main(void)
+{
+  bass = megabass();
+  vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);
+  uv -= 0.5;
+  uv /= vec2(v2Resolution.y / v2Resolution.x, 1);
+
+  vec3 ro = vec3(0.0, 0.0, bass * 5.0);
+  vec3 rd = normalize(vec3(uv, normalize(length(uv)) - 0.6));
+
+  rd.xz *= rot(0.1 * bass);
+
+  vec3 p = rm(ro, rd);
+  vec3 n = grad(p);
+  vec3 color = shade(p, ro, n);
+
+  vec3 rd2 = reflect(rd, n);
+  vec3 ro2 = p + rd * 0.01;
+
+  vec3 p2 = rm(ro2, rd2);
+  vec3 n2 = grad(p2); 
+
+  color = mix(color, shade(p2, ro, n2), 0.9);
+  color = pow(color, vec3(1.0 / 2.2));
+  out_color = vec4(color, 1.0);
+}

2018-05-25/03-lsdlive.glsl

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+#version 410 core
+
+uniform float fGlobalTime; // in seconds
+uniform vec2 v2Resolution; // viewport resolution (in pixels)
+
+uniform sampler1D texFFT; // towards 0.0 is bass / lower freq, towards 1.0 is higher / treble freq
+uniform sampler1D texFFTSmoothed; // this one has longer falloff and less harsh transients
+uniform sampler1D texFFTIntegrated; // this is continually increasing
+uniform sampler2D texChecker;
+uniform sampler2D texNoise;
+uniform sampler2D texTex1;
+uniform sampler2D texTex2;
+uniform sampler2D texTex3;
+uniform sampler2D texTex4;
+
+layout(location = 0) out vec4 out_color; // out_color must be written in order to see anything
+
+vec4 plas( vec2 v, float time )
+{
+  float c = 0.5 + sin( v.x * 10.0 ) + cos( sin( time + v.y ) * 20.0 );
+  return vec4( sin(c * 0.2 + cos(time)), c * 0.15, cos( c * 0.1 + time / .4 ) * .25, 1.0 );
+}
+
+
+#define time fGlobalTime
+
+mat2 r2d(float a){float c=cos(a),s=sin(a);return mat2(c,s,-s,c);}
+
+float re(float p,float d){return mod(p-d*.5,d)-d*.5;}
+
+void amod(inout vec2 p,float d){float a=re(atan(p.x,p.y),d);p=vec2(cos(a),sin(a))*length(p);}
+
+float sc(vec3 p,float d){
+p=abs(p);
+p=max(p,p.yzx);
+return min(p.x,min(p.y,p.z))-d;
+}
+
+void mo(inout vec2 p,vec2 d){
+p.x=abs(p.x)-d.x;
+p.y=abs(p.y)-d.y;
+if(p.y>p.x)p.yx=p;
+}
+
+float g=0.;
+float de(vec3 p){
+float t=time*4.;
+//p.y+=.5;
+float s=t*.1+sin(t)*.1;
+
+
+p.xy*=r2d(time);//.77+s*2.5);
+
+//p.xz*=r2d(.77+s*2.5);
+//p.xy*=r2d(.77+s*2.5);
+
+p.xy*=r2d(p.z*.1);
+
+p.z=re(p.z,2);
+
+amod(p.xy,6.28/5.);
+
+mo(p.xz,vec2(.3, 1.3));
+mo(p.xy,vec2(2.2, 1.5+sin(.77+t*.5)*.2));
+
+float sc2 =sc(p,1.3);
+
+amod(p.xy,6.28/3.4);
+
+
+
+mo(p.xy,vec2(1.3, .2));
+
+//p.x=abs(p.x)-1;
+//p.y=abs(p.y)-1;
+
+float d= sc(p,.4);
+
+d=max(d,-sc2);
+
+g+=.01/(.02+d*d);
+return d;
+return dot(p,normalize(sign(p)))-.6;
+}
+
+
+void main(void)
+{
+  vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);
+  uv -= 0.5;
+  uv /= vec2(v2Resolution.y / v2Resolution.x, 1);
+
+vec3 ro=vec3(0,0,-3+time*4);
+vec3 rd=normalize(vec3(uv,1));
+
+float t=0,i=0;
+vec3 p;
+for(;i<1;i+=.01){
+p=ro+rd*t;
+float d=de(p);
+//if(d<.001)break;
+d=max(abs(d),.02);
+t+=d*.4;
+}
+
+vec3 c =mix(vec3(.7,.3,.4),vec3(.1,.4,.2),uv.x+i);
+c+=g*.02;
+c.r+=sin(p.z)*.3;
+c=mix(c,vec3(.2,.1,.2),1-exp(-.01*t*t));
+c*=1.2;
+  out_color = vec4(c,1);
+}

2018-05-25/04-gwi.frag

@@ -0,0 +1,49 @@
+
+precision mediump float;
+
+uniform float time;
+uniform vec2 resolution;
+
+float sdSphere (vec3 p, float r) { return length(p) - r; }
+
+float sdCube(vec3 p, float r) { return min(abs(p.x - 0.5) * mod(time, 0.2), abs(p.y - 0.5) * mod(time, 0.6)); }
+
+float map (vec3 pos) {
+  float scene = 1000.;
+  scene = min(scene, sdCube(pos, 0.4));
+  return scene;
+}
+
+vec3 lookAt (vec3 eye, vec3 at, vec2 uv) {
+  vec3 forward = normalize(at - eye);
+  vec3 right = normalize(cross(forward, vec3(0,1,0)));
+  vec3 up = normalize(cross(right, forward));
+  return normalize(forward + right * uv.x + up * uv.y);
+}
+
+void main () {
+  vec2 uv = (gl_FragCoord.xy-.5*resolution.xy)/resolution.y;
+  vec3 eye = vec3(0,1,-3);
+  vec3 ray = lookAt(eye, vec3(0), uv);
+  vec3 pos = eye;
+  float shade = 0.;
+  for (float SpherePos = -0.8; SpherePos < 0.8; SpherePos += 0.2)
+  {
+    for (float i = 0.; i <= 1.; i += 1./60.) {
+      float dist = sdCube(pos, 0.5);
+      dist = dist * sdSphere(pos, 0.1);
+      //dist += sdSphere(pos, 0.8);
+      pos += mod(time, 0.2);
+      dist += sdSphere(vec3(0.9, 0., 0.) + pos, 0.5);
+      if (dist < .001) {
+        shade = 1.-i;
+        break;
+      }
+      pos += dist * ray;
+    }
+  }
+
+  vec3 color = vec3(mod(time, 1.), mod(time, 0.1), mod(time, 0.3));
+  color *= shade;
+  gl_FragColor = vec4(color, 1);
+}

2018-05-25/Readme.md

@@ -0,0 +1,3 @@
+# Cookie Showdown #8
+
+On May 25th, 2018 at [Mains d’Œuvres](https://www.mainsdoeuvres.org/).