Polygon constructor

Polygon(
  1. List<Vector2> _vertices, {
  2. bool? convex,
})

Constructs the polygon from the given list of vertices.

If the list is not in the counter-clockwise order, then it will be reversed in-place.

If the convex flag is provided, then it serves as a hint about whether the polygon is convex or not. With this flag the user promises that the vertices are already in the correct CCW order.