critter
Class World

java.lang.Object
  |
  +--critter.World

public class World

extends java.lang.Object

Constructor Summary

World(int x, int y, long seed)
Constructs the world of a given size

Method Summary

boolean	addCritter(critter.Critter obj) Adds a critter to the world, position and direction are randomly chosen
boolean	addCritter(critter.Critter obj, int x, int y, int dir_x, int dir_y) Adds a critter to a specified position in the world and with a specified direction
boolean	empty(int x, int y) true if the position is empty (no obstacle, food or critter
void	init(double foodRate, double obstacleRate) populates the world with food and obstacles
int	peek(int x, int y) Retrieves the object found in a particular position on the grid
void	updateMoves() Each critter's act method is called and executed in the world.
void	updateSenses() Updates the state of all critters, has complete control over signals (the way the world gives rise to sensor readings).

Methods inherited from class java.lang.Object

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

Constructor Detail

World

public World(int x,
             int y,
             long seed)

Constructs the world of a given size

Parameters:

x - number of positions along x-axis

y - number of positions along y-axis

seed - seed for the random number generator

Method Detail

init

public void init(double foodRate,
                 double obstacleRate)

populates the world with food and obstacles

peek

public int peek(int x,
                int y)

Retrieves the object found in a particular position on the grid

empty

public boolean empty(int x,
                     int y)

true if the position is empty (no obstacle, food or critter

addCritter

public boolean addCritter(critter.Critter obj,
                          int x,
                          int y,
                          int dir_x,
                          int dir_y)

Adds a critter to a specified position in the world and with a specified direction

addCritter

public boolean addCritter(critter.Critter obj)

Adds a critter to the world, position and direction are randomly chosen

updateSenses

public void updateSenses()

Updates the state of all critters, has complete control over signals (the way the world gives rise to sensor readings). Each critter gets a 6-element sensor vector: [0] range to FOOD ahead (a value 3 - 0, where 3 is FOOD is in the next position, and 0 is no FOOD insight) [1] range to FOOD to the left [2] range to FOOD to the right [3] range to OBSTACLE/CRITTER ahead [4] range to OBSTACLE/CRITTER to the left [5] range to OBSTACLE/CRITTER to the right

updateMoves

public void updateMoves()

Each critter's act method is called and executed in the world. Controls how the neurons of the critter translate into movements, if allowed etc. The critter has two wheels, two neurons connect to the wheels, each producing -1/0/+1 for reverse/still/forward rotation.