Package jason.environment.grid

Class GridWorldModel

java.lang.Object

jason.environment.grid.GridWorldModel

public class GridWorldModel
extends Object

Simple model for a grid world (with agents and obstacles).

Every agent gets an identification (a integer from 0 to the number of ag - 1). The relation of this identification with agent's name should be done in the environment class and is application dependent.

Every type of object in the environment is represented by a bit mask: an agent is 000010; an obstacle is 000100; .... New types of objects should follow this pattern, for example, GOLD = 8 (001000), ENEMY=16 (010000), ... A place with two object is represented by the OR between the masks: an agent and a gold is 001010.

Limitations:

• The number of agents can not change dynamically
• Two agents can not share the same place. More generally, two objects with the same "mask" can not share a place.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	AGENT
protected Location[]	agPos
static final int	CLEAN
protected int[][]	data
protected int	height
static final int	OBSTACLE
protected Random	random
protected GridWorldView	view
protected int	width

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	GridWorldModel(int w, int h, int nbAgs)

Method Summary

Modifier and Type	Method	Description
void	add(int value, int x, int y)
void	add(int value, Location l)
void	addWall(int x1, int y1, int x2, int y2)
int	countObjects(int obj)
int	getAgAtPos(int x, int y)	returns the agent at x,y or -1 if there is not one there
int	getAgAtPos(Location l)	returns the agent at location l or -1 if there is not one there
Location	getAgPos(int ag)
protected Location	getFreePos()	returns a random free location using isFree to test the availability of some possible location (it means free of agents and obstacles)
protected Location	getFreePos(int obj)	returns a random free location using isFree(object) to test the availability of some possible location
int	getHeight()
int	getNbOfAgs()
int	getWidth()
boolean	hasObject(int obj, int x, int y)
boolean	hasObject(int obj, Location l)
boolean	inGrid(int x, int y)
boolean	inGrid(Location l)
boolean	isFree(int x, int y)	returns true if the location x,y has neither obstacle nor agent
boolean	isFree(int obj, int x, int y)	returns true if the location x,y has not the object obj
boolean	isFree(int obj, Location l)	returns true if the location l has not the object obj
boolean	isFree(Location l)	returns true if the location l has no obstacle neither agent
boolean	isFreeOfObstacle(int x, int y)
boolean	isFreeOfObstacle(Location l)
void	remove(int value, int x, int y)
void	remove(int value, Location l)
void	removeAll(int value)
void	set(int value, int x, int y)
void	setAgPos(int ag, int x, int y)
void	setAgPos(int ag, Location l)
void	setView(GridWorldView v)

Methods inherited from class java.lang.Object

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

Field Details

CLEAN

public static final int CLEAN

See Also:

• Constant Field Values

AGENT

public static final int AGENT

See Also:

• Constant Field Values

OBSTACLE

public static final int OBSTACLE

See Also:

• Constant Field Values

width

protected int width

height

protected int height

data

protected int[][] data

agPos

protected Location[] agPos

view

protected GridWorldView view

random

protected Random random

Constructor Details

GridWorldModel

protected GridWorldModel(int w,
 int h,
 int nbAgs)

Method Details

setView

public void setView(GridWorldView v)

getWidth

public int getWidth()

getHeight

public int getHeight()

getNbOfAgs

public int getNbOfAgs()

inGrid

public boolean inGrid(Location l)

inGrid

public boolean inGrid(int x,
 int y)

hasObject

public boolean hasObject(int obj,
 Location l)

hasObject

public boolean hasObject(int obj,
 int x,
 int y)

countObjects

public int countObjects(int obj)

set

public void set(int value,
 int x,
 int y)

add

public void add(int value,
 Location l)

add

public void add(int value,
 int x,
 int y)

addWall

public void addWall(int x1,
 int y1,
 int x2,
 int y2)

remove

public void remove(int value,
 Location l)

remove

public void remove(int value,
 int x,
 int y)

removeAll

public void removeAll(int value)

setAgPos

public void setAgPos(int ag,
 Location l)

setAgPos

public void setAgPos(int ag,
 int x,
 int y)

getAgPos

public Location getAgPos(int ag)

getAgAtPos

public int getAgAtPos(Location l)

returns the agent at location l or -1 if there is not one there

getAgAtPos

public int getAgAtPos(int x,
 int y)

returns the agent at x,y or -1 if there is not one there

isFree

public boolean isFree(Location l)

returns true if the location l has no obstacle neither agent

isFree

public boolean isFree(int x,
 int y)

returns true if the location x,y has neither obstacle nor agent

isFree

public boolean isFree(int obj,
 Location l)

returns true if the location l has not the object obj

isFree

public boolean isFree(int obj,
 int x,
 int y)

returns true if the location x,y has not the object obj

isFreeOfObstacle

public boolean isFreeOfObstacle(Location l)

isFreeOfObstacle

public boolean isFreeOfObstacle(int x,
 int y)

getFreePos

protected Location getFreePos()

returns a random free location using isFree to test the availability of some possible location (it means free of agents and obstacles)

getFreePos

protected Location getFreePos(int obj)

returns a random free location using isFree(object) to test the availability of some possible location