uchicago.src.repastdemos.life
Class InfiniteLifeSpace

java.lang.Object
  uchicago.src.repastdemos.life.InfiniteLifeSpace

All Implemented Interfaces:

Space

public class InfiniteLifeSpace
extends java.lang.Object
implements Space

An infinte grid space for LifeAgents. This is "infinite" in that it is a really large sparse matrix. InfiniteSpaceDisplay is a kind of window into this grid. Agents inhabit the grid cells. This class is responsible for creating new LifeAgents in those cells that have 3 and only 3 LifeAgents for neighbors.

Field Summary

static int

MAX

Constructor Summary

InfiniteLifeSpace(LifeModel model, int viewWidth, int viewHeight)
Creates this InfiniteLifeSpace. viewWidth and viewHeight will be the width of the initial view window into this space.

Method Summary

void	addAgent(LifeAgent agent) Adds the agent at its coordinates.
Displayable	getDisplay() Returns the Displayable appropriate for this space.
int	getNumNeighbors(int x, int y) Returns the number of LifeAgents around the x, y coordinate.
int	getXSize() Returns the width of this InfiniteLifeSpace.
int	getYSize() Returns the height of this InfiniteLifeSpace.
boolean	isEmptyAt(int x, int y) Returns true if the cell at the specified coordinates is empty.
void	remove(LifeAgent agent) Removes an agent from this space.
void	removeAgentAt(int x, int y) Removes the agent at the specified coordinates.
void	step(java.util.ArrayList list) Checks if any empty space is surrounded by 3 and only 3 LifeAgents, and if so then creates new LifeAgent there.

Methods inherited from class java.lang.Object

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

Field Detail

MAX

public static final int MAX

Constructor Detail

InfiniteLifeSpace

public InfiniteLifeSpace(LifeModel model,
                         int viewWidth,
                         int viewHeight)

Creates this InfiniteLifeSpace. viewWidth and viewHeight will be the width of the initial view window into this space. The x, y origin of the view window will be roughly the middle of the Space minus one-half of the width / height.

Method Detail

getXSize

public int getXSize()

Returns the width of this InfiniteLifeSpace.

Specified by:

getXSize in interface Space

getYSize

public int getYSize()

Returns the height of this InfiniteLifeSpace.

Specified by:

getYSize in interface Space

remove

public void remove(LifeAgent agent)

Removes an agent from this space. Actual removal is not performed until after all step() methods have completed.

Specified by:

remove in interface Space

removeAgentAt

public void removeAgentAt(int x,
                          int y)

Removes the agent at the specified coordinates. This occurs immediately.

Specified by:

removeAgentAt in interface Space

addAgent

public void addAgent(LifeAgent agent)

Adds the agent at its coordinates.

Specified by:

addAgent in interface Space

getNumNeighbors

public int getNumNeighbors(int x,
                           int y)

Returns the number of LifeAgents around the x, y coordinate. This is a Moore neighborhood.

Specified by:

getNumNeighbors in interface Space

isEmptyAt

public boolean isEmptyAt(int x,
                         int y)

Returns true if the cell at the specified coordinates is empty.

Specified by:

isEmptyAt in interface Space

getDisplay

public Displayable getDisplay()

Returns the Displayable appropriate for this space. In this case, this returns an InfiniteSpaceDisplay.

Specified by:

getDisplay in interface Space

step

public void step(java.util.ArrayList list)

Checks if any empty space is surrounded by 3 and only 3 LifeAgents, and if so then creates new LifeAgent there.

Specified by:

step in interface Space