@macrostrat/column-components/dist/chroma-js/src/interpolator/_hsx.cjs

React rendering primitives for stratigraphic columns

"use strict";
const Color = require("../Color.cjs");
const interpolate_hsx = (col1, col2, f, m) => {
  let xyz0, xyz1;
  if (m === "hsl") {
    xyz0 = col1.hsl();
    xyz1 = col2.hsl();
  } else if (m === "hsv") {
    xyz0 = col1.hsv();
    xyz1 = col2.hsv();
  } else if (m === "hcg") {
    xyz0 = col1.hcg();
    xyz1 = col2.hcg();
  } else if (m === "hsi") {
    xyz0 = col1.hsi();
    xyz1 = col2.hsi();
  } else if (m === "lch" || m === "hcl") {
    m = "hcl";
    xyz0 = col1.hcl();
    xyz1 = col2.hcl();
  } else if (m === "oklch") {
    xyz0 = col1.oklch().reverse();
    xyz1 = col2.oklch().reverse();
  }
  let hue0, hue1, sat0, sat1, lbv0, lbv1;
  if (m.substr(0, 1) === "h" || m === "oklch") {
    [hue0, sat0, lbv0] = xyz0;
    [hue1, sat1, lbv1] = xyz1;
  }
  let sat, hue, lbv, dh;
  if (!isNaN(hue0) && !isNaN(hue1)) {
    if (hue1 > hue0 && hue1 - hue0 > 180) {
      dh = hue1 - (hue0 + 360);
    } else if (hue1 < hue0 && hue0 - hue1 > 180) {
      dh = hue1 + 360 - hue0;
    } else {
      dh = hue1 - hue0;
    }
    hue = hue0 + f * dh;
  } else if (!isNaN(hue0)) {
    hue = hue0;
    if ((lbv1 == 1 || lbv1 == 0) && m != "hsv") sat = sat0;
  } else if (!isNaN(hue1)) {
    hue = hue1;
    if ((lbv0 == 1 || lbv0 == 0) && m != "hsv") sat = sat1;
  } else {
    hue = Number.NaN;
  }
  if (sat === void 0) sat = sat0 + f * (sat1 - sat0);
  lbv = lbv0 + f * (lbv1 - lbv0);
  return m === "oklch" ? new Color([lbv, sat, hue], m) : new Color([hue, sat, lbv], m);
};
module.exports = interpolate_hsx;
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