Class UFO

java.lang.Object

UFO

public class UFO
extends java.lang.Object

A class representing a single UFO object that can move, fire, and be hit.

Field Summary

Fields

Modifier and Type	Field and Description
static int	FAST_SHIP
private boolean	goLeft
private int	life
static int	SIMPLE_SAUCER
static int	SUPER_SAUCER
private int	ticksSinceLastFire
private int	uFOType
private int	xPosition
private int	yPosition

Constructor Summary

Constructors

Constructor and Description
UFO(int startX, int startY, int uFOType) Constructs an UFO object given its type and initial position

Method Summary

Modifier and Type	Method and Description
Laser	fireWeapon(Defender defender) Return the bullet this UFO is about to fire.
int	getUFOType() Get an int represented the type for this UFO
int	getXPosition() Get the current x coordinate of the center of this UFO.
int	getYPosition() Get the current y coordinate of the center of this UFO.
boolean	isHitByLaser(Laser theLaser) Returns whether this UFO intersects this Laser
void	recordHit() Updates the Object to record that it has been hit by a Laser.
boolean	removeMeFromGame() Returns true if this UFO has been destroyed.
boolean	shootsThisTurn(Defender defender) Return true if this UFO fires this during this tick.
void	takeOneStep(Defender defender) Updates the position of the UFO for the next time it is redrawn.

Methods inherited from class java.lang.Object

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

Field Detail

SIMPLE_SAUCER

public static final int SIMPLE_SAUCER

See Also:

Constant Field Values

FAST_SHIP

public static final int FAST_SHIP

See Also:

Constant Field Values

SUPER_SAUCER

public static final int SUPER_SAUCER

See Also:

Constant Field Values

xPosition

private int xPosition

yPosition

private int yPosition

uFOType

private int uFOType

goLeft

private boolean goLeft

ticksSinceLastFire

private int ticksSinceLastFire

life

private int life

Constructor Detail

UFO

public UFO(int startX,
           int startY,
           int uFOType)

Constructs an UFO object given its type and initial position

Parameters:

startX - initial x coordinate

startY - initial y coordinate

uFOType - int representing the type of UFO this is.

Method Detail

getXPosition

public int getXPosition()

Get the current x coordinate of the center of this UFO.

Returns:

The current x coordinate of the center of this UFO.

getYPosition

public int getYPosition()

Get the current y coordinate of the center of this UFO.

Returns:

The current y coordinate of the center of this UFO.

getUFOType

public int getUFOType()

Get an int represented the type for this UFO

Returns:

The int representing the type of this UFO

takeOneStep

public void takeOneStep(Defender defender)

Updates the position of the UFO for the next time it is redrawn.

Parameters:

defender - The Defender object. Ignore for now, but it may be used in challege task to determine movement some UFO types.

shootsThisTurn

public boolean shootsThisTurn(Defender defender)

Return true if this UFO fires this during this tick.

Parameters:

defender - The Defender object. Ignore for now, but it may be used in challege task to determine firing for some UFO types.

Returns:

Whether or not this UFO shoots on this tick.

fireWeapon

public Laser fireWeapon(Defender defender)

Return the bullet this UFO is about to fire.

Parameters:

defender - The Defender object. Ignore for now, but it may be used in challege task to determine firing for some UFO types.

Returns:

The bullet this UFO is about to fire.

isHitByLaser

public boolean isHitByLaser(Laser theLaser)

Returns whether this UFO intersects this Laser

Parameters:

theLaser -

Returns:

true if this UFO intersects this Laser

recordHit

public void recordHit()

Updates the Object to record that it has been hit by a Laser. This method is called every time the UFO is struck by a Laser.

removeMeFromGame

public boolean removeMeFromGame()

Returns true if this UFO has been destroyed.

Returns:

true if the UFO has been destroyed.