javascript Object Oriented implementation of conways game of life
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javascript object-oriented implementation of conways game of life

Try it at

Basic example: Suppose you have a div tag with id my-conways-space, with which you intend to wrap a Conway's Game of Life board then you can place a instance of Conway's Game of Life under that div:

     var conways = new Conways(number_of_rows, number_of_columns, 'my-conways-space', 'id-for-this-conways-board', 10);
     conways.draw();; // 50 is a pace (speed) for the game to run

(Currently, if you try to place two Conways objects, only one will be run. Looking to fix that)

Note that if you want to use buttons to control the game, here are some functions that are helpful:

    conways.pause(); // pause the game
    conways.clear(); // clears the world

To enable the display of color representing the strength (activity of a grid), you need to do:

    conways.handleColor(true); // true means the color handling is triggered from clicking a button

In that basic example, you will need to put this line of code above, so that the color setting is done before running. But you can customize this for your own purposes.

You can also make a pattern, by creating an array of coordinates, namely, a 2D Array that has row = coordinates, and col = 2, which is just x and y. For example, for the Gosper's Glider Gun,

      var coords =
          [1, 5],[1, 6],[2, 5],[2, 6],[11, 5],
          [11, 6],[11, 7],[12, 4],[12, 8],[13, 3],
          [13, 9],[14, 3],[14, 9],[15, 6],[16, 4],
          [16, 8],[17, 5],[17, 6],[17, 7],[18, 6],
          [21, 3],[21, 4],[21, 5],[22, 3],[22, 4],
          [22, 5],[23, 2],[23, 6],[25, 1],[25, 2],
          [25, 6],[25, 7],[35, 3],[35, 4],[36, 3],[36, 4]

Then, you can feed this pattern to the current Conways object:

     conways.feedPattern(coords); // the current pattern will be replaced. It will call draw() itself


This version of Life improves the performance by only caring about the 'active' cells - ones that are alive and surrounds alive.

For a reminder of the rules of Conway's Game of Life:

    Any live cell with fewer than two live neighbours dies, as if caused by under-population.
    Any live cell with two or three live neighbours lives on to the next generation.
    Any live cell with more than three live neighbours dies, as if by overcrowding.
    Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.

Good Luck!

Copyright 2014 Kaiyu Zheng