public Polygon(params Vector2[] vertices)
{
Vertices = new Vector2[vertices.Length];
Normals = new Vector2[vertices.Length];
// re-center the polygon so that the centroid is on the origin.
CalculateCentroid();
if (!Vector2Extensions.AlmostZero(Centroid))
{
for (int i = 0; i < vertices.Length; i++)
{
Vertices[i] = Vertices[i] - Centroid;
}
}
CalculateCentroid();
}