tipgame.game.gammacentauri.tracker
Class ShipTracker

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

All Implemented Interfaces:

Tracker

public class ShipTracker
extends java.lang.Object
implements Tracker

Tracks and moves a player's ship.

Author:

Tom James

Field Summary

static double	ACCEL_DAMPENER The amount by which the velocity of the ship will be divided each time frame.
private int	height
private java.awt.geom.Point2D.Double	location The location of the ship.
private double	velocity The velocity of the ship.
private int	width

Constructor Summary

ShipTracker(double x, double y, double velocity, int width, int height)
Constructs a ship given an x-coordinate, y-coordinate, and 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	getVelocity()
void	setLocation(double x, double y)
void	setVelocity(double velocity) Sets the velocity of the ship to a 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 ship.

velocity

private double velocity

The velocity of the ship.

ACCEL_DAMPENER

public static final double ACCEL_DAMPENER

The amount by which the velocity of the ship will be divided each time frame.

See Also:

Constant Field Values

width

private int width

height

private int height

Constructor Detail

ShipTracker

public ShipTracker(double x,
                   double y,
                   double velocity,
                   int width,
                   int height)

Constructs a ship given an x-coordinate, y-coordinate, and velocity.

Parameters:

x - The x-coordinate of the ship.

y - The y-coordinate of the ship.

velocity - The velocity of the ship.

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

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

setVelocity

public void setVelocity(double velocity)

Sets the velocity of the ship to a given velocity.

Parameters:

velocity - The velocity to which the ship will be set.

getVelocity

public double getVelocity()

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

setLocation

public void setLocation(double x,
                        double y)