ca

A framework for simulating cellular automata.

You can simulate any discrete cellular automata by passing a function.

Possible automata include, but are not limited to:

Game of life and game of life variants.
Elementary cellular automata
Langton's ant-style automata (can be used in conjunction with other board rules or ants.)
Cyclic automata
Forest fire simulation automata.
Anything else you can imagine.

(function examples?)

quick start

To simulate an automaton, include the draw.js and automata.js files.

automata.js exposes a Board object and objects defining frequently used rules and neighborhoods.

Conway's Game of Life

(Is this up to date?)

  var draw2dBoard = function(canvasId, board, scale){
    var canvas = document.getElementById(canvasId);
    var context = canvas.getContext("2d");

    var d = new Drawer(context, board, scale)
    d.draw2dBoard();
  };

  // Game of Life
  var lifeBoard = new Board([50, 50], 2, neighborhoods.moore, [0.70, 0.3]).setRule(rules.gameOfLife)
  draw2dBoard("lifeBoard", lifeBoard, 6);


$(document).ready(function() {
  var boardSize = 300;

  // Elementary cellular automata
  var elemCanvas = document.getElementById("elemBoard");
  var elemContext = elemCanvas.getContext("2d");


var cells = [50, 50]
 , states = 2
 , randomStart = true

board = new Board(cells, states, neighborhoods.moore, randomStart).setRule(rules.gameOfLife)

})

custom automaton

var cells = [50, 50]
 , states = 4
 , randomStart = true


var topNeighborhood = [[0,0], [1,0], [2,0]] // The cell itself, the cell above, and the cell above that.

board = new Board(cells, states, 4, randomStart).setRule(function(states){
    if ([0,1].indexOf(states[0]) !== -1){
        return 2;
    }
    if ([2,3,4].indexOf(states[1]) !== -1){
        return 3;
    }      
    return Math.floor(Math.random() * 4);
 })

Elementary cellular automaton

This is a 1-dimensional cellular automata.

Consider the famous Rule 30 (00011110)

The binary numbers define the 8 possible states for the candidate cell and its two neighbors. A 1 means the cell's value in the next iteration is 1 (alive, presumably), 0 means the opposite. "Rule 30 is of special interest because it is chaotic" (http://mathworld.wolfram.com/Rule30.html)

Todo

Add 3-d support (three.js?) [http://cubes.io/]
improve Langton's ant.

chirs/cellular_automata

ca

quick start

Conway's Game of Life

custom automaton

Elementary cellular automaton

Todo

Other postential automata to implement