/// <summary>
/// Returns whether the point is contained inside the face.
/// </summary>
/// <remarks>
/// This assumes the face is convex
/// </remarks>
/// <param name="a_pos"></param>
/// <returns></returns>
public bool Contains(Vector2 a_pos)
{
if (IsOuter)
{
// check whether point is contained inside the outer polygon of one of the innercomponents
return(!InnerComponents.Exists(e => e.Twin.Face.PolygonWithoutHoles.ContainsInside(a_pos)));
}
return(Polygon.ContainsInside(a_pos));
}
public Rational Area()
{
if (Bounded)
{
return(OuterComponent.CycleArea() - InnerComponents.Aggregate <DCEL_HalfEdge, Rational>(0, (area, inner) => area + inner.CycleArea()));
}
else
{
return(0);
}
}