public Circle(Point2d center, float radius)
{
Center = center;
Radius = radius;
}
public bool OverlapWith(Circle circle)
{
return(Radius + circle.Radius < Point2d.Distance(Center, circle.Center));
}
public Circle(float x, float z, float radius)
{
Center = new Point2d(x, z);
Radius = radius;
}