Parasitemia/Parasitemia/Types.fs

   1 module Types
   2
   3 open System
   4
   5 type Ellipse (cx: float, cy: float, a: float, b: float, alpha: float) =
   6     member this.Cx = cx
   7     member this.Cy = cy
   8     member this.A = a
   9     member this.B = b
  10     member this.Alpha = alpha
  11     member this.Area = a * b * Math.PI
  12
  13     // Does the ellipse contain the point (x, y)?.
  14     member this.Contains x y =
  15         ((x - cx) * cos alpha + (y - cy) * sin alpha) ** 2.0 / a ** 2.0 + ((x - cx) * sin alpha - (y - cy) * cos alpha) ** 2.0 / b ** 2.0 <= 1.0