Danmaku_no_Kyojin.Collisions.CollisionCircle.GetCenter C# (CSharp) Method

        public override Vector2 GetCenter()
        {
            return new Vector2(
                Parent.Position.X + RelativePosition.X * (float)(-Math.Sin(Parent.Rotation)),
                Parent.Position.Y + RelativePosition.Y * (float)(Math.Cos(Parent.Rotation))
            );
        }

        private bool Intersects(CollisionCircle element)
        {
            float dx    = element.GetCenter().X - GetCenter().X;
            float dy    = element.GetCenter().Y - GetCenter().Y;
            float radii = Radius + element.Radius;

            if ((dx * dx) + (dy * dy) < radii * radii)
            {
                return(true);
            }

            return(false);
        }