freesewing/packages/examples/src/path_split.js

export default part => {
  let { Point, points, Path, paths, Snippet, snippets } = part.shorthand();

  points.A = new Point(45, 60);
  points.B = new Point(10, 30);
  points.BCp2 = new Point(40, 20);
  points.C = new Point(90, 30);
  points.CCp1 = new Point(50, -30);
  points.D = new Point(50, 130);
  points.DCp1 = new Point(150, 30);

  paths.demo = new Path()
    .move(points.D)
    .curve(points.DCp1, points.DCp1, points.C)
    .curve(points.CCp1, points.BCp2, points.B)
    .line(points.A);

  points.split = paths.demo.shiftFractionAlong(0.75);
  snippets.x = new Snippet("x", points.split);

  let style = "stroke-width: 3; stroke-opacity: 0.5;";
  let halves = paths.demo.split(points.split);
  for (let i in halves) {
    paths[i] = halves[i]
      .attr("style", style)
      .attr("style", `stroke: hsl(${i * 70}, 100%, 50%)`);
  }

  return part;
};