export default function(part) {
  let { Point, points, Path, paths, measurements, options } = part.shorthand();

  let width = measurements.headCircumference * options.widthRatio;
  let length = measurements.headCircumference * options.lengthRatio;

  points.topLeft = new Point(
    width / -2,
    points.top.y - (width / 2 - points.right.x)
  );
  points.topRight = points.topLeft.shift(0, width);
  points.bottomLeft = points.topLeft.shift(-90, length);
  points.bottomRight = points.topRight.shift(-90, length);

  paths.rect = new Path()
    .move(points.topLeft)
    .line(points.bottomLeft)
    .line(points.bottomRight)
    .line(points.topRight)
    .line(points.topLeft)
    .close();

  return part;
}