Zmiany

* It is best when the ball starts to move from the centre of the screen (Y=0). The initial value of X may be any value (e.g. randomly selected from the range between -200 and 200).

* Setting the angle of the ball’s direction to 45 degrees, i.e. top right, will allow the player to figure out how to control the racket. At this point it is a good idea to revise directions with students – an angle of 0 degrees is the direction upwards, then we move clockwise, so an angle of 90 degrees is the direction to the right. Thus an angle of 45 degrees will direct the ball diagonally upwards and to the right. In discussing the value of each angle we can use the following illustration.