fang
Class TrackerAdapter

java.lang.Object
  fang.TrackerAdapter

All Implemented Interfaces:

Tracker

Direct Known Subclasses:

AbsoluteTransformer, AlternateTracker, InputFieldSprite.InputTracker, StringField.InputTracker

public abstract class TrackerAdapter
extends Object
implements Tracker

provides a default implementation of the Tracker interface methods except for advanceTime

Author:

Jam Jenkins

Constructor Summary

TrackerAdapter()

Method Summary

abstract void	advanceTime(double time) this method is called between each frame.
double	getRotationAddition() returns 0.
double	getRotationAdditionDegrees() returns 0.
double	getRotationAdditionRadians() returns 0.
double	getRotationAdditionRevolutions() returns 0.
double	getScaleFactor() returns 1
Point2D.Double	getTranslation() returns (0, 0)

Methods inherited from class java.lang.Object

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

Constructor Detail

TrackerAdapter

public TrackerAdapter()

Method Detail

getTranslation

public Point2D.Double getTranslation()

returns (0, 0)

Specified by:

getTranslation in interface Tracker

Returns:

the absolute location of the Sprite

See Also:

fang.core.Tracker#getTranslation()

getScaleFactor

public double getScaleFactor()

returns 1

Specified by:

getScaleFactor in interface Tracker

Returns:

the multiplicative scaling factor

See Also:

fang.core.Tracker#getScaleFactor()

getRotationAddition

public double getRotationAddition()

returns 0. This method is the same as getRotationAddition. The name was changed to make the units explicit, and therefore this method has been deprecated. Please use getRotationAdditionRadians instead.

Specified by:

getRotationAddition in interface Tracker

Returns:

the radians to add

See Also:

fang.core.Tracker#getRotationAddition()

getRotationAdditionRadians

public double getRotationAdditionRadians()

returns 0. This method calls getRotationAdditionDegrees and converts the result from degrees to radians. If you want a non-zero value returned, you can override this method. Override this method, the getRotationAdditionDegrees method, or the getRotationAdditionRevolutions method, but not a combination of the three.

Returns:

the radians to add

See Also:

fang.core.Tracker#getRotationAddition()

getRotationAdditionDegrees

public double getRotationAdditionDegrees()

returns 0. This method may be overridden to return a non-zero number of degrees to add. Override this method, the getRotationAddition method, or the getRotationAdditionRevolutions method, but not a combination of the three.

Returns:

the degrees to add

getRotationAdditionRevolutions

public double getRotationAdditionRevolutions()

returns 0. This method may be overridden to return a non-zero number of revolutions to add. Override this method, the getRotationAdditionDegrees method, or the getRotationAddition method, but not a combination of the three.

Returns:

the degrees to add

advanceTime

public abstract void advanceTime(double time)

this method is called between each frame. The time parameter is the amount of time which has pased since the last frame, which is typically about 1/26 of a second.

Specified by:

advanceTime in interface Tracker

Parameters:

time - the amount of time passed since the last call to this method