public void PolygonU()
{
var polygon = Shaper.PolygonU(new Vector3(), new Vector3(3.0, 5.0), 1.0);
var vertices = polygon.Vertices;
Assert.Contains(vertices, p => p.X == 0.0 && p.Y == 0.0);
Assert.Contains(vertices, p => p.X == 3.0 && p.Y == 0.0);
Assert.Contains(vertices, p => p.X == 3.0 && p.Y == 5.0);
Assert.Contains(vertices, p => p.X == 2.0 && p.Y == 5.0);
Assert.Contains(vertices, p => p.X == 2.0 && p.Y == 1.0);
Assert.Contains(vertices, p => p.X == 1.0 && p.Y == 1.0);
Assert.Contains(vertices, p => p.X == 1.0 && p.Y == 5.0);
Assert.Contains(vertices, p => p.X == 0.0 && p.Y == 5.0);
}