/// <summary>
/// Returns a Vector2D dictating a point on the tank's radius relative to the angle of the
/// object (projectile / powerup). Used for collision detection for Tanks calulated as a circle
/// and another objects locatiton Vector2D.
/// </summary>
/// <param name="tank">Vector2D location of the tank</param>
/// <param name="obj">Vector2D location of the object</param>
/// <param name="tankWidth">Width of the tank</param>
/// <returns></returns>
private Vector2D GetTankRadius(Vector2D tank, Vector2D obj, double tankWidth)
{
double radius = tankWidth / 2;
float angle = Vector2D.AngleBetweenPoints(tank, obj);
float x = (float)(Math.Cos(angle) * radius);
float y = (float)(Math.Sin(angle) * radius);
return(new Vector2D(x, y));
}