Custom hydra effect

truchet..js

// https://hydra.ojack.xyz/

setFunction({
  name: 'truchet',
  type: 'src',
  inputs: [
    {
      type: 'float',
      name: 'T',
      default: 0.,
    }
 ,  {
      type: 'float',
      name: 'Z',
      default: 0.125,
    }
  , {
      type: 'float',
      name: 'W',
      default: 0.02,
    }
  , {
      type: 'float',
      name: 'AA',
      default: 0.0025,
    }
  ],
  glsl:
	`   
  vec2 P=_st, N;
  P+=sin(vec2(1,sqrt(.5))*T);  
  N=floor(P/Z+.5);
  P-=N*Z;
  P.x*=(fract(sin(dot(N ,vec2(12.9898,58.233)))*43758.5453)>.5)?1.:-1.;
  return vec4(vec3(smoothstep(AA,-AA,abs(min(length(P-.5*Z)-.5*Z,length(P+.5*Z)-.5*Z))-W*Z)),1);
    `
})

const ar = window.innerWidth / window.innerHeight;
const pat=osc(17,0.2,0).thresh(0.2,0.2);
truchet(()=>time*0.2,0.125,0.1,0.00125)
    .diff(pat)
    .invert()
    .mult(osc(20,0.1,1).mult(pat))
    .kaleid(20)
    .scale(1,1,ar)
	.out()
  	;

truchet_variant.js

// https://hydra.ojack.xyz/

setFunction({
  name: 'truchet',
  type: 'src',
  inputs: [
    {
      type: 'float',
      name: 'T',
      default: 0.,
    }
 ,  {
      type: 'float',
      name: 'Z',
      default: 0.125,
    }
  , {
      type: 'float',
      name: 'W',
      default: 0.02,
    }
  , {
      type: 'float',
      name: 'AA',
      default: 0.0025,
    }
  ],
  glsl:
	`   
  vec2 P=_st, N;
  P+=sin(vec2(1,sqrt(.5))*T);  
  N=floor(P/Z+.5);
  P-=N*Z;
  P.x*=(fract(sin(dot(N ,vec2(12.9898,58.233)))*43758.5453)>.5)?1.:-1.;
  return vec4(vec3(smoothstep(AA,-AA,abs(min(length(P-.5*Z)-.5*Z,length(P+.5*Z)-.5*Z))-W*Z)),1);
    `
})

const ar = window.innerWidth / window.innerHeight;
truchet(()=>time*0.2,0.125,0.1,0.005)
    .diff(osc(17,0.2,0).thresh(0.2,0.2))
    .rotate(0,.15)
    .invert()
    .mult(osc(20,0.1,1))
    .kaleid(17)
    .scale(1,1,ar)
	.out()
  	;