tipgame.game.gammacentauri.tracker
Class EnemyTracker

java.lang.Object
  tipgame.game.gammacentauri.tracker.EnemyTracker

All Implemented Interfaces:

Tracker

public class EnemyTracker
extends java.lang.Object
implements Tracker

Tracks and moves an enemy.

Author:

Tom James

Field Summary

private int	height
private java.awt.geom.Point2D.Double	location The location of the enemy.
private double	velocityX The horizontal velocity of the enemy.
private double	velocityY The vertical velocity of the enemy.
private int	width

Constructor Summary

EnemyTracker(double x, double y, double velocityX, double velocityY, int width, int height)
Constructs an enemy given an x-coordinate, y-coordinate, horizontal velocity, and vertical velocity.

Method Summary

void	advanceTime(double time) called every time time is advanced.
java.awt.geom.Point2D.Double	getLocation() determines the absolute location (i.e.
double	getRotationAddition() determines the relative rotation.
double	getScaleFactor() determines the relative scaling factor.
double	getVelocityX()
double	getVelocityY()
void	setLocation(java.awt.geom.Point2D.Double point) Sets the location of the enemy to a given point.
void	setVelocityX(double velocityX) Sets the horizontal velocity of the enemy to the given velocity.
void	setVelocityY(double velocityY) Sets the vertical velocity of the enemy to the given velocity.

Methods inherited from class java.lang.Object

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

Field Detail

location

private java.awt.geom.Point2D.Double location

The location of the enemy.

velocityX

private double velocityX

The horizontal velocity of the enemy.

velocityY

private double velocityY

The vertical velocity of the enemy.

width

private int width

height

private int height

Constructor Detail

EnemyTracker

public EnemyTracker(double x,
                    double y,
                    double velocityX,
                    double velocityY,
                    int width,
                    int height)

Constructs an enemy given an x-coordinate, y-coordinate, horizontal velocity, and vertical velocity.

Parameters:

x - The x-coordinate of the enemy.

y - The y-coordinate of the enemy.

velocityX - The horizontal velocity of the enemy.

velocityY - The vertical velocity of the enemy.

Method Detail

getLocation

public java.awt.geom.Point2D.Double getLocation()

Description copied from interface: Tracker

determines the absolute location (i.e. not necessarily relative to the Sprite's last location)

Specified by:

getLocation in interface Tracker

Returns:

the absolute location of the Sprite

setLocation

public void setLocation(java.awt.geom.Point2D.Double point)

Sets the location of the enemy to a given point.

Parameters:

point - The point to which the enemy will be moved.

setVelocityX

public void setVelocityX(double velocityX)

Sets the horizontal velocity of the enemy to the given velocity.

Parameters:

velocityX - The horizontal velocity of the enemy.

getVelocityX

public double getVelocityX()

Returns:

The horizontal velocity of the enemy.

setVelocityY

public void setVelocityY(double velocityY)

Sets the vertical velocity of the enemy to the given velocity.

Parameters:

velocityY - The vertical velocity of the enemy.

getVelocityY

public double getVelocityY()

Returns:

The vertical velocity of the enemy.

getScaleFactor

public double getScaleFactor()

Description copied from interface: Tracker

determines the relative scaling factor. This method will take the current size of the Sprite and scale it by the factor returned

Specified by:

getScaleFactor in interface Tracker

Returns:

the multiplicative scaling factor

getRotationAddition

public double getRotationAddition()

Description copied from interface: Tracker

determines the relative rotation. This method will take the current orientation and rotate it by the value returned.

Specified by:

getRotationAddition in interface Tracker

Returns:

the amount to rotate in radians

advanceTime

public void advanceTime(double time)

Description copied from interface: Tracker

called every time time is advanced. The amount of time which has passed since the last call. This method must also accept negative time intervals for reversing time. The magnitude of the negative time interval will not exceed the magnitude of the last positive time interval. Also, the keyboard and mouse inputs will remain constant when the interval is negative.

Specified by:

advanceTime in interface Tracker

Parameters:

time - the time in seconds since the last frame