Julia Morphism

// 025 - Julia Morphism (experimental)
// 1:1 Original algorithm engine source
function createJuliaMorph() {
  const SAMPLES = 50;
  return {
    setup() {
    },
    render(context, timeState, params) {
      const { ctx, width, height } = context;
      const t = timeState.time * Number(params.speed || 0.4);
      const maxIter = Number(params.maxIter || 24);
      const cr = -0.8 + 0.15 * Math.cos(t * 0.7);
      const ci = 0.156 + 0.15 * Math.sin(t * 0.7);
      const stepX = width / SAMPLES;
      const stepY = height / SAMPLES;
      ctx.fillStyle = "#08090d";
      ctx.fillRect(0, 0, width, height);
      for (let y = 0; y < SAMPLES; y++) {
        const zy0 = y / SAMPLES * 2.8 - 1.4;
        for (let x = 0; x < SAMPLES; x++) {
          const zx0 = x / SAMPLES * 2.8 - 1.4;
          let zx = zx0;
          let zy = zy0;
          let iter = 0;
          while (zx * zx + zy * zy < 4 && iter < maxIter) {
            const tempX = zx * zx - zy * zy + cr;
            zy = 2 * zx * zy + ci;
            zx = tempX;
            iter++;
          }
          if (iter < maxIter) {
            const smoothIter = iter + 1 - Math.log(Math.log(Math.sqrt(zx * zx + zy * zy))) / Math.log(2);
            const hue = (smoothIter * 14 + t * 20) % 360;
            const px = x * stepX;
            const py = y * stepY;
            ctx.fillStyle = hsla(hue, 85, 60, 0.75);
            ctx.fillRect(px, py, stepX + 0.5, stepY + 0.5);
          }
        }
      }
    }
  };
}

// Default parameters from content metadata
const defaultParams = [
  {
    "key": "speed",
    "label": "Morph Velocity",
    "type": "range",
    "min": 0.1,
    "max": 1.5,
    "step": 0.05,
    "defaultValue": 0.4,
    "description": "Parameter space orbit speed"
  },
  {
    "key": "maxIter",
    "label": "Max Iterations",
    "type": "range",
    "min": 10,
    "max": 50,
    "step": 2,
    "defaultValue": 24,
    "description": "Fractal escape depth"
  }
];

if (!window.__art_instances) window.__art_instances = {};
if (!window.__art_instances['julia-morph']) {
  const inst = typeof createJuliaMorph === 'function' ? createJuliaMorph() : null;
  if (inst && inst.setup) {
    inst.setup({ ctx, width, height, dpr: 1, aspectRatio: width / height }, defaultParams);
  }
  window.__art_instances['julia-morph'] = inst;
}

const instance = window.__art_instances['julia-morph'];
if (instance && instance.render) {
  instance.render(
    { ctx, width, height, dpr: 1, aspectRatio: width / height },
    { time, deltaTime: dt, frameCount: Math.floor(time * 60), fps: 60 },
    defaultParams
  );
}