@macrostrat/column-components/dist/chroma-js/src/io/hcg/hcg2rgb.js

React rendering primitives for stratigraphic columns

import "../../utils/type.js";
import unpack from "../../utils/unpack.js";
const { floor } = Math;
const hcg2rgb = (...args) => {
  args = unpack(args, "hcg");
  let [h, c, _g] = args;
  let r, g, b;
  _g = _g * 255;
  const _c = c * 255;
  if (c === 0) {
    r = g = b = _g;
  } else {
    if (h === 360) h = 0;
    if (h > 360) h -= 360;
    if (h < 0) h += 360;
    h /= 60;
    const i = floor(h);
    const f = h - i;
    const p = _g * (1 - c);
    const q = p + _c * (1 - f);
    const t = p + _c * f;
    const v = p + _c;
    switch (i) {
      case 0:
        [r, g, b] = [v, t, p];
        break;
      case 1:
        [r, g, b] = [q, v, p];
        break;
      case 2:
        [r, g, b] = [p, v, t];
        break;
      case 3:
        [r, g, b] = [p, q, v];
        break;
      case 4:
        [r, g, b] = [t, p, v];
        break;
      case 5:
        [r, g, b] = [v, p, q];
        break;
    }
  }
  return [r, g, b, args.length > 3 ? args[3] : 1];
};
export {
  hcg2rgb as default
};
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