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Game of Life in Backbone.js
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| var stepTime = 1; | |
| var col = undefined; | |
| var Cell = Backbone.Model.extend({ | |
| x: -1, | |
| y: -1, | |
| alive: false, | |
| nextAlive: false, | |
| initialize: function() { | |
| this.id = this.get('x')+","+this.get('y'); | |
| }, | |
| computeNextState: function(){ | |
| var na = col.neighbors(this); | |
| if(this.get('alive')){ | |
| if(na == 2 || na == 3){ | |
| this.set({'nextAlive': true}) | |
| } else { | |
| this.set({'nextAlive': false}) | |
| } | |
| }else{ | |
| if(na == 3){ | |
| this.set({'nextAlive': true}) | |
| } else { | |
| this.set({'nextAlive': false}) | |
| } | |
| } | |
| }, | |
| transition: function(){ | |
| this.set({'alive': this.get('nextAlive')}); | |
| } | |
| }); | |
| var CellView = Backbone.View.extend({ | |
| tagName: 'td', | |
| initialize: function() { | |
| this.model.bind('change:alive', _.bind(this.reRender, this)); | |
| }, | |
| render: function(){ | |
| $(this.el).attr({'width': 6, 'height': 4}); | |
| this.reRender(); | |
| }, | |
| reRender: function(){ | |
| $(this.el).attr({'bgcolor': this.model.get('alive') ? '#000' : '#FFF'}); | |
| } | |
| }); | |
| var CellCollection = Backbone.Collection.extend({ | |
| model: Cell, | |
| neighbors: function(model){ | |
| var ns = 0; | |
| _([-1,0,1]).each(function(xd) { | |
| _([-1,0,1]).each(function(yd) { | |
| if(xd == 0 && yd == 0){ | |
| } else { | |
| n = col.get((model.get('x')+xd)+","+(model.get('y')+yd)) | |
| if (n && n.get('alive')) { | |
| ns ++; | |
| } | |
| } | |
| }); | |
| }); | |
| return ns; | |
| } | |
| }); | |
| function stepGame(){ | |
| col.each( function(e){ | |
| e.computeNextState(); | |
| }); | |
| col.each( function(e){ | |
| e.transition(); | |
| }); | |
| setTimeout("stepGame()", stepTime); | |
| } | |
| $(function(){ | |
| var models = new Array(); | |
| var trs = $(document.createElement('tbody')); | |
| for(var x=0; x< 100; x++){ | |
| var tr = $(document.createElement('tr')); | |
| for(var y=0; y<100; y++){ | |
| var alive = (Math.floor(Math.random() * 100) % 2) == 1; | |
| var cell = new Cell({'x': x, 'y': y, 'alive': alive}); | |
| models.push(cell); | |
| var cv = new CellView({model: cell}); | |
| cv.render(); | |
| tr.append(cv.el); | |
| } | |
| trs.append(tr) | |
| } | |
| $('#world').html(trs) | |
| col = new CellCollection(models); | |
| setTimeout("stepGame()", stepTime); | |
| }); |
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| <html> | |
| <head> | |
| <script type="text/javascript" src="jquery.min.js"></script> | |
| <script type="text/javascript" src="underscore.js"></script> | |
| <script type="text/javascript" src="backbone.js"></script> | |
| <script type="text/javascript" src="game_of_life.js"></script> | |
| </head> | |
| <body> | |
| <table id="world"> | |
| </table> | |
| </body> | |
| </html> |
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