engine

Class GameEngine

java.lang.Object

engine.GameEngine

public class GameEngine
extends java.lang.Object

This class acts as the engine of the game. It handles storing, creating, and removing objects, collision, and organized shooting and moving.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ENDLESS_MODE
java.lang.String	gameMode
GameWindow	gameWindow
static java.lang.String	LIMITED_MODE
static int	LOST
static int	STILL_GOING
static int	WON

Constructor Summary

Constructors

Constructor and Description
GameEngine(GameWindow gameWindow, int numberOfEnemies) This constructor creates a game in the given window with the given number of enemies and in the default game mode Limited.
GameEngine(GameWindow gameWindow, int numberOfEnemies, java.lang.String gameMode) This constructor creates a game in the given window with the given number of enemies and in the specified game mode It creates ArrayLists with initial estimations of size and creates a player and spawn enemies.

Method Summary

Modifier and Type	Method and Description
void	addBullet(Shooter shooter) This method creates a bullet with a given shooter and then adds it to the game objects.
void	addGameObject(AbstractGameObject gameObject) This method adds a game object to the appropriate list.
int	checkEndCondition() This method checks the state of the win/lose conditions for the current mode
void	cleanUp() This method is called when game is over.
java.util.ArrayList<AbstractGameObject>	getGameObjects() This method returns the game objects list.
GameWindow.GamePanel	getGameWindow() This method returns the actual game panel.
int	getKillCount() This method returns the kill count.
PlayerShip	getPlayer() This method return the palyer.
void	manDown(AbstractGameObject deadObject) The method is called by an object if it's dead.
void	notifyObjectsOfWindow() This method passes the game window (actually game panel) to a static reference in AbstractGameObject to be used by all game objects.
void	notifyWindowOfObjects() This method passes the game objects to the window.
void	notifyWindowOfPlayer() This method passes the player to the window.
void	update() This method updates the game.

Methods inherited from class java.lang.Object

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

Field Detail

gameWindow

public GameWindow gameWindow

gameMode

public java.lang.String gameMode

LIMITED_MODE

public static final java.lang.String LIMITED_MODE

See Also:

Constant Field Values

ENDLESS_MODE

public static final java.lang.String ENDLESS_MODE

See Also:

Constant Field Values

WON

public static final int WON

See Also:

Constant Field Values

STILL_GOING

public static final int STILL_GOING

See Also:

Constant Field Values

LOST

public static final int LOST

See Also:

Constant Field Values

Constructor Detail

GameEngine

public GameEngine(GameWindow gameWindow,
                  int numberOfEnemies,
                  java.lang.String gameMode)

This constructor creates a game in the given window with the given number of enemies and in the specified game mode It creates ArrayLists with initial estimations of size and creates a player and spawn enemies. It also notifies the window of the game objects list and vice versa.

Parameters:

gameWindow - the window containing the panel the game is drawn on

numberOfEnemies - the number of enemies or intial enemies

gameMode - the game mode the game is played in

GameEngine

public GameEngine(GameWindow gameWindow,
                  int numberOfEnemies)

This constructor creates a game in the given window with the given number of enemies and in the default game mode Limited. It does the same as the other constructor

Parameters:

gameWindow - the window containing the panel the game is drawn on

numberOfEnemies - the number of enemies or intial enemies

Method Detail

addGameObject

public void addGameObject(AbstractGameObject gameObject)

This method adds a game object to the appropriate list.

Parameters:

gameObject - the game object

addBullet

public void addBullet(Shooter shooter)

This method creates a bullet with a given shooter and then adds it to the game objects.

Parameters:

shooter - the shooter of the bullet

getGameObjects

public java.util.ArrayList<AbstractGameObject> getGameObjects()

This method returns the game objects list.

Returns:

returns game objects list

getPlayer

public PlayerShip getPlayer()

This method return the palyer.

Returns:

returns the player

update

public void update()

This method updates the game. It lets te shooters shoot. The movers move. Checks collisions. And removes the dead objects.

checkEndCondition

public int checkEndCondition()

This method checks the state of the win/lose conditions for the current mode

Returns:

returns -1 if the player lost, 0 if the game is still going, and 1 if the player won

manDown

public void manDown(AbstractGameObject deadObject)

The method is called by an object if it's dead. It adds it to the dead objects list. If the object is an enemy ship it increases the kill count.

Parameters:

deadObject - the dead object

getKillCount

public int getKillCount()

This method returns the kill count.

Returns:

returns the number of enemy ships killed

notifyWindowOfObjects

public void notifyWindowOfObjects()

This method passes the game objects to the window.

notifyWindowOfPlayer

public void notifyWindowOfPlayer()

This method passes the player to the window.

notifyObjectsOfWindow

public void notifyObjectsOfWindow()

This method passes the game window (actually game panel) to a static reference in AbstractGameObject to be used by all game objects.

getGameWindow

public GameWindow.GamePanel getGameWindow()

This method returns the actual game panel. We pretend to deal with game window for simplicity.

Returns:

returns the actual game panel.

cleanUp

public void cleanUp()

This method is called when game is over. It removes and clears all lists. And passes the final score to GameTier