Class Bouncer

java.lang.Object

Bouncer

public class Bouncer
extends java.lang.Object

Handle the math calculations needed to determine if the ball hits a paddle or a wall.

Field Summary

Fields

Modifier and Type	Field	Description
static int	BOTTOM
static int	LEFT
static int	NONE
static int	RIGHT
static int	TOP

Constructor Summary

Constructors

Constructor	Description
Bouncer()

Method Summary

Modifier and Type	Method	Description
static int	getPaddleSideHit(PongPaddle paddle, PongBall ball)	Check if the ball has hit the paddle.
static int	getWallHit(double left, double right, double top, double bottom, PongBall ball)	Determine which wall, if any, the ball has hit.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NONE

public static final int NONE

See Also:

Constant Field Values

LEFT

public static final int LEFT

See Also:

Constant Field Values

RIGHT

public static final int RIGHT

See Also:

Constant Field Values

TOP

public static final int TOP

See Also:

Constant Field Values

BOTTOM

public static final int BOTTOM

See Also:

Constant Field Values

Constructor Detail

Bouncer

public Bouncer()

Method Detail

getPaddleSideHit

public static int getPaddleSideHit(PongPaddle paddle,
                                   PongBall ball)

Check if the ball has hit the paddle. If so, return which side of the paddle has been hit. Also shifts the ball's position to the point of impact.

Parameters:

paddle - the paddle to be checked

ball - the ball

Returns:

one of Bouncer.LEFT, Bouncer.RIGHT, Bouncer.TOP, Bouncer.BOTTOM indicating which side of the paddle has been hit, or Bouncer.NONE if the paddle has not been hit

getWallHit

public static int getWallHit(double left,
                             double right,
                             double top,
                             double bottom,
                             PongBall ball)

Determine which wall, if any, the ball has hit. Also shifts the ball's position to the point of impact. Note that "top" and "bottom" refer to the relative position on the screen - because lower y coordinates are higher up on the screen, the top wall will have a smaller y coordinate than the bottom wall.

Parameters:

left - x coordinate of the left wall (left < right)

right - x coordinate of the right wall (left < right)

top - y coordinate of the top wall (top < bottom)

bottom - y coordinate of the bottom wall (top < bottom)

ball - the ball

Returns:

one of Bouncer.LEFT, Bouncer.RIGHT, Bouncer.TOP, Bouncer.BOTTOM indicating which wall has been hit, or Bouncer.NONE if no wall has been hit