@antv/f2/es/deps/d3-interpolate/src/cubehelix.js

Charts for mobile visualization.

import { cubehelix as colorCubehelix } from '../../d3-color/src';
import color, { hue } from './color.js';
function cubehelix(hue) {
  return function cubehelixGamma(y) {
    y = +y;
    function cubehelix(start, end) {
      var h = hue((start = colorCubehelix(start)).h, (end = colorCubehelix(end)).h),
        s = color(start.s, end.s),
        l = color(start.l, end.l),
        opacity = color(start.opacity, end.opacity);
      return function (t) {
        start.h = h(t);
        start.s = s(t);
        start.l = l(Math.pow(t, y));
        start.opacity = opacity(t);
        return start + '';
      };
    }
    cubehelix.gamma = cubehelixGamma;
    return cubehelix;
  }(1);
}
export default cubehelix(hue);
export var cubehelixLong = cubehelix(color);