BNG_Pong_resetBall

// resets the ball's position to the centre of the play area
// also sets the ball direction speed towards the last point winner

function resetBall(loser)
{
   	// position the ball in the center of the table
	ball.position.x = 0;
	ball.position.y = 0;
	
	// if player lost the last point, we send the ball to opponent
	if (loser == 1)
	{
		ballDirX = -1;
	}
	// else if opponent lost, we send ball to player
	else
	{
		ballDirX = 1;
	}
	
	// set the ball to move +ve in y plane (towards left from the camera)
	ballDirY = 1;
}