wyvern.lib.properties
Class Projectile

java.lang.Object
  wyvern.lib.properties.Projectile

All Implemented Interfaces:

Timed

public class Projectile

extends java.lang.Object

implements Timed

Property to turn an object into a missile

Version:

1.0, Mar 28, 1999

Author:

Eric Weber

Field Summary

protected java.lang.String	baseImage_
protected Point	dest_
protected int	interval_
protected int	range_
protected Point	src_
protected boolean	stopped_ Is set to true when stop() is called, so multiple calls to stop() don't result in duping bugs.
protected GameObject	target_
protected Timer	timer_

Constructor Summary

Projectile(GameObject target)
Create an inactive projectile

Projectile(GameObject target, Point destination, int interval, int range)
Create and start a projectile

Method Summary

protected boolean	advance() Advance the projectile in the default direction
Point	getDestination()
int	getInterval()
int	getRange()
Point	getSource()
GameObject	getTarget()
boolean	maybeReturnToOwner(Commandable agent) Returns item to the owner's inventory, if we can find the owner in an "agent" property, and
void	revertBitmap() Reverts the target object's image, if we set it to an in-flight image temporarily.
void	setDestination(Point dest)
void	setInFlightImage() Sets the in-flight image for the target object that we're moving.
void	setInterval(int interval)
void	setRange(int range)
void	start() Starts projectile moving toward its destination.
void	stop() Stops projectile.
void	timerExpired() Time to move the projectile
java.lang.String	toString() Returns debugging string.

Methods inherited from class java.lang.Object

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

Field Detail

src_

protected Point src_

dest_

protected Point dest_

interval_

protected int interval_

range_

protected int range_

timer_

protected Timer timer_

target_

protected GameObject target_

baseImage_

protected java.lang.String baseImage_

stopped_

protected boolean stopped_

Is set to true when stop() is called, so multiple calls to stop() don't result in duping bugs.

Constructor Detail

Projectile

public Projectile(GameObject target)

Create an inactive projectile

Parameters:

target - object to be moved

Projectile

public Projectile(GameObject target,
                  Point destination,
                  int interval,
                  int range)

Create and start a projectile

Parameters:

target - object to be moved

destination - where the object should go

interval - how long between steps

range - how many steps to make

Method Detail

getTarget

public GameObject getTarget()

getSource

public Point getSource()

getDestination

public Point getDestination()

setDestination

public void setDestination(Point dest)

getRange

public int getRange()

setRange

public void setRange(int range)

getInterval

public int getInterval()

setInterval

public void setInterval(int interval)

start

public void start()

Starts projectile moving toward its destination. If target object has a "move-img" property, tells the object to change its appearance to that image path. If so, the target should have a matching "base-image" property that stores the original image path, so when the projectile stops it can restore the original image.

stop

public void stop()

Stops projectile.

setInFlightImage

public void setInFlightImage()

Sets the in-flight image for the target object that we're moving. If it has a "move-img" property, the target's image is set to that image while it's in flight.

revertBitmap

public void revertBitmap()

Reverts the target object's image, if we set it to an in-flight image temporarily.

timerExpired

public void timerExpired()

Time to move the projectile

Specified by:

timerExpired in interface Timed

advance

protected boolean advance()

Advance the projectile in the default direction

Returns:

true if we should continue moving, false otherwise

maybeReturnToOwner

public boolean maybeReturnToOwner(Commandable agent)

Returns item to the owner's inventory, if we can find the owner in an "agent" property, and

Parameters:

agent - the agent who fired it or threw it - may be null

Returns:

true if we returned it to agent's inventory

toString

public java.lang.String toString()

Returns debugging string.