+ member this.Scale (factor: float) =
+ Ellipse(this.Cx, this.Cy, this.A * factor, this.B * factor, alpha)
+
+ // Approximation of Ramanujan.
+ member this.Perimeter =
+ Math.PI * (3.0 * (this.A + this.B) - sqrt ((3.0 * this.A + this.B) * (this.A + 3.0 * this.B)))
+
+ override this.ToString () =
+ sprintf "(cx: %A, cy: %A, a: %A, b: %A, alpha: %A)" this.Cx this.Cy this.A this.B this.Alpha
+