Package edu.ucsb.cs56.projects.games.pacman

Class Ghost

java.lang.Object

edu.ucsb.cs56.projects.games.pacman.Character

edu.ucsb.cs56.projects.games.pacman.Ghost

public class Ghost
extends Character

A class used to represent the ghost enemies used for AI-controlled ghosts in the standard mode and for player controlled ghosts in multiplayer

Version:

CS56 F17

Author:

Dario Castellanos Anaya, Daniel Ly, Kelvin Yang, Joseph Kompella, Kekoa Sato, Nicholas Duncan, Wei Tung Chen

Field Summary

Fields

Modifier and Type	Field	Description
static int	defaultSpeed
boolean	edible
int	edibleTimer
static int	GHOST1
static int	GHOST2
static java.lang.String	IMAGE_PATH
int	prev_speed
int	type
static int	TYPE_PINK
static int	TYPE_RED

Fields inherited from class edu.ucsb.cs56.projects.games.pacman.Character

alive, assetImagePath, deathTimer, dx, dy, lives, playerNum, reqdx, reqdy, speed, startX, startY, x, y

Constructor Summary

Constructors

Constructor	Description
Ghost(int x, int y, int speed, int type)	Ghost class constructor for singleplayer
Ghost(int x, int y, int speed, int type, int playerNum, Grid grid)
Ghost(int x, int y, int speed, int playerNum, Grid grid)	Ghost class constructor for multiplayer

Method Summary

Modifier and Type	Method	Description
void	death()	Handles character's death coordinates are reset to the coordinates that the ghost initially started at and the ghost becomes inedible
void	death(int newX, int newY)	Handles character's death and allows specification of a new location for the character to spawn at
void	draw(java.awt.Graphics2D g, javax.swing.JComponent canvas)	Draws the ghost
java.awt.Image	getLifeImage()	Returns the image used for displaying remaining lives
void	keyPressed(int key)	Handles player keyboard input
void	keyReleased(int key)	Handles key releases for game controls
void	loadImages()	Load ghost sprites from images folder
void	move(Grid grid)	Moves character's current position with the board's collision Handles logic pertaining to collision detection, movement, and standstill
void	moveAI(Grid grid, Character[] c)	For ghosts that are close to pacman, have them follow pacman with a specified probability
void	moveRandom(Grid grid)	Pick a random move from the list of available movement options for the ghost to move in
Node	pathFind(Grid grid, int x, int y)	A* pathfinding algorithm

Methods inherited from class edu.ucsb.cs56.projects.games.pacman.Character

move, moveable, reset, resetPos, setSpeed, setX, setY

Methods inherited from class java.lang.Object

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

Field Detail

IMAGE_PATH

public static final java.lang.String IMAGE_PATH

See Also:

Constant Field Values

TYPE_RED

public static final int TYPE_RED

See Also:

Constant Field Values

TYPE_PINK

public static final int TYPE_PINK

See Also:

Constant Field Values

GHOST1

public static final int GHOST1

See Also:

Constant Field Values

GHOST2

public static final int GHOST2

See Also:

Constant Field Values

defaultSpeed

public static int defaultSpeed

edible

public boolean edible

prev_speed

public int prev_speed

edibleTimer

public int edibleTimer

type

public int type

Constructor Detail

Ghost

public Ghost(int x,
             int y,
             int speed,
             int type)

Ghost class constructor for singleplayer

Parameters:

x - x-position of ghost

y - y-position of ghost

speed - the ghost's initial movement speed

type - the type of ghost

Ghost

public Ghost(int x,
             int y,
             int speed,
             int playerNum,
             Grid grid)

Ghost class constructor for multiplayer

Parameters:

x - x-position

y - y-position

speed - initial

playerNum - a number to indicate which player is controlling this ghost

grid - the grid used to determine movement/collision

Ghost

public Ghost(int x,
             int y,
             int speed,
             int type,
             int playerNum,
             Grid grid)

Method Detail

death

public void death()

Handles character's death coordinates are reset to the coordinates that the ghost initially started at and the ghost becomes inedible

Specified by:

death in class Character

death

public void death(int newX,
                  int newY)

Handles character's death and allows specification of a new location for the character to spawn at

Parameters:

newX - the new x-coordinate that the ghost will respawn at

newY - the new y-coordinate that the ghost will respawn at

draw

public void draw(java.awt.Graphics2D g,
                 javax.swing.JComponent canvas)

Draws the ghost

Specified by:

draw in class Character

Parameters:

g - used to draw the "ghost" or "scared_ghost" sprites

canvas - the component that the ghost sprites are drawn onto

loadImages

public void loadImages()

Load ghost sprites from images folder

Specified by:

loadImages in class Character

getLifeImage

public java.awt.Image getLifeImage()

Returns the image used for displaying remaining lives

Specified by:

getLifeImage in class Character

Returns:

Image of ghost

keyPressed

public void keyPressed(int key)

Handles player keyboard input

Specified by:

keyPressed in class Character

Parameters:

key - Integer representing the key pressed

keyReleased

public void keyReleased(int key)

Description copied from class: Character

Handles key releases for game controls

Specified by:

keyReleased in class Character

Parameters:

key - Integer representing the key released

move

public void move(Grid grid)

Moves character's current position with the board's collision Handles logic pertaining to collision detection, movement, and standstill

Specified by:

move in class Character

Parameters:

grid - The Grid to be used for collision detection

moveAI

public void moveAI(Grid grid,
                   Character[] c)

For ghosts that are close to pacman, have them follow pacman with a specified probability

Specified by:

moveAI in class Character

Parameters:

grid - The Grid to be used for the collision

c - Array of pacmen to chase

pathFind

public Node pathFind(Grid grid,
                     int x,
                     int y)

A* pathfinding algorithm

Parameters:

grid - the grid to be used for pathfinding

x - target x coordinate in grid form

y - target y coordinate in grid form

Returns:

The next move to make for the ghost

moveRandom

public void moveRandom(Grid grid)

Pick a random move from the list of available movement options for the ghost to move in

Parameters:

grid - The Grid to be used for collision