public void PolygonC()
{
var polygon = Shaper.PolygonC(new Vector3(2.0, 2.0), new Vector3(3.0, 5.0), 1.0);
var vertices = polygon.Vertices;
Assert.Contains(vertices, p => p.X == 2.0 && p.Y == 2.0);
Assert.Contains(vertices, p => p.X == 5.0 && p.Y == 2.0);
Assert.Contains(vertices, p => p.X == 5.0 && p.Y == 3.0);
Assert.Contains(vertices, p => p.X == 3.0 && p.Y == 3.0);
Assert.Contains(vertices, p => p.X == 3.0 && p.Y == 6.0);
Assert.Contains(vertices, p => p.X == 5.0 && p.Y == 6.0);
Assert.Contains(vertices, p => p.X == 5.0 && p.Y == 7.0);
Assert.Contains(vertices, p => p.X == 2.0 && p.Y == 7.0);
}