public void checkBoundaryCollision(Ball ball, Point2D.Double projectedCenter){
		if(projectedCenter.x - Ball.RADIUS <= WEST_WALL.x1){
			ball.getVelocity().x = Maths.positive(ball.getVelocity().x);
		}
		if(projectedCenter.y - Ball.RADIUS <= NORTH_WALL.y1){
			ball.getVelocity().y = Maths.positive(ball.getVelocity().y);
		}
		if(projectedCenter.x + Ball.RADIUS >= EAST_WALL.x1){
			ball.getVelocity().x = Maths.negative(ball.getVelocity().x);
		}
		if(projectedCenter.y + Ball.RADIUS >= SOUTH_WALL.y1){
			ball.getVelocity().y = Maths.negative(ball.getVelocity().y);
		}
	}