Lección 10 de 10 · Animación en shaders

Tu movimiento

Combina todo. Tu coreografía de figuras.

El código

void main(){
  vec2 p = (2.*gl_FragCoord.xy - R) / min(R.x, R.y);
  float ox = sin(T*.3)*.3+sin(T*.17)*.15+sin(T*.07)*.1;
  float oy = sin(T*.23)*.25+sin(T*.13)*.12;
  float t = mod(T, 5.);
  float elastic = exp(-t*1.5)*sin(t*10.)*.2;
  float beat = pow(sin(T*2.)*.5+.5, 8.);
  float breath = 0.2+0.05*sin(T*0.618);
  vec3 col = vec3(0.03,0.02,0.06);
  float ripple = sin(length(p)*10.-T*2.)*.5+.5;
  col += vec3(.08,.06,.15)*ripple*exp(-length(p));
  float dc = length(p-vec2(ox,oy))-(breath+beat*.08);
  col += vec3(.5,.2,.08)*exp(-max(dc,0.)*3.)*.4;
  col += vec3(.95,.45,.15)*smoothstep(.02,-.02,dc);
  col += vec3(1.,.85,.5)*exp(-length(p-vec2(ox,oy))*4.)*smoothstep(.02,-.02,dc)*.3;
  vec2 sc = vec2(-ox*.4,elastic);
  vec2 sq = abs(p-sc)-vec2(.13);
  float ds = max(sq.x,sq.y);
  vec2 gsq = abs(p-vec2(sc.x,-.8))-vec2(.15+abs(elastic)*.1,.012);
  col *= smoothstep(-.01,.1,max(gsq.x,gsq.y));
  col += vec3(.15,.42,.48)*exp(-max(ds,0.)*3.)*.4;
  col += vec3(.3,.88,.95)*smoothstep(.01,-.01,ds);
  float a = T*.4;
  vec2 tc = vec2(cos(a),sin(a))*.5;
  float ca=cos(a*2.),sa=sin(a*2.);
  vec2 tp = p-tc; tp = vec2(tp.x*ca-tp.y*sa,tp.x*sa+tp.y*ca);
  vec2 at = abs(tp);
  float dt = max(at.x*.866+tp.y*.5,-tp.y)-.11;
  col += vec3(.2,.15,.08)*smoothstep(.02,.0,abs(length(p)-.5))*.25;
  col += vec3(.5,.4,.1)*exp(-max(dt,0.)*3.)*.4;
  col += vec3(.95,.8,.2)*smoothstep(.01,-.01,dt);
  vec2 hp = abs(p+vec2(oy*.3,-ox*.2));
  float rh = .15+beat*.1;
  float dh = max(hp.x*.866+hp.y*.5,hp.y)-rh;
  col += vec3(.4,.15,.45)*exp(-max(dh,0.)*3.)*.4;
  col += vec3(.85,.35,.9)*smoothstep(.02,-.02,dh);
  col += vec3(.95,.7,.95)*beat*smoothstep(.02,-.02,dh)*.3;
  col = hueShift(col, 0.0);
  gl_FragColor = vec4(col, 1.);
}