code: function convertPolyToP2TPoly(poly) {
    return poly.points.map(function(p) {
      return new poly2tri.Point(p.x, p.y);
    });
  }
docs: A polygon for use with poly2tri.
  @private
  @typedef P2TPoly
  @type {Array.<P2TPoint>}
   
  Convert a polygon into format required by poly2tri.
  @private
  @param {Poly} poly - The polygon to convert.
  @return {P2TPoly} - The converted polygon.