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    <p>In your <code>initialize</code>method, you access global variables instead of instance variables: <code>scene = new THREE.Scene();</code> will in fact reference <code>window.scene</code>.</p> <p>Check this example</p> <pre><code>var BodyShapeView = Backbone.View.extend({ scene:null, initialize:function(opts) { scene=opts.scene; } }); var s1=new BodyShapeView({scene:'s1'}); var s2=new BodyShapeView({scene:'s2'}); console.log(window.scene); //outputs s2 console.log(s1.scene); //outputs null </code></pre> <p><a href="http://jsfiddle.net/K8tjJ/1/" rel="nofollow">http://jsfiddle.net/K8tjJ/1/</a></p> <p>Change these references to <code>this.scene</code>, <code>this.camera</code>, etc.</p> <pre><code>var BodyShapeView = Backbone.View.extend({ scene:null, initialize:function(opts) { this.scene=opts.scene; } }); var s1=new BodyShapeView({scene:'s1'}); var s2=new BodyShapeView({scene:'s2'}); console.log(window.scene); //outputs undefined console.log(s1.scene); //outputs s1 </code></pre> <p><a href="http://jsfiddle.net/K8tjJ/2/" rel="nofollow">http://jsfiddle.net/K8tjJ/2/</a></p> <p>Additionally, <code>loader.load</code> uses a callback to process its results, you will (probably) lose the reference to <code>this</code> in the function. Try</p> <pre><code>var _this=this; loader.load( "img/originalMeanModel.obj", function ( object ) { ... _this.scene.add( _this.mesh ); // or _this.model if you prefer, but beware }); </code></pre> <p>Note that <code>this.model</code> is a special variable in Backbone.View and should be treated with care if you ever want to pass a model to your view.</p>
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    1. COThanks for the reply @nikoshr this makes complete sense! The only problem I now have is that when adding the model to the scene in the loader function I receive this error. "Uncaught TypeError: Cannot call method 'add' of undefined " for this line this.scene.add( this.model );
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    2. CO@TrueWheel The joys of this in JS. I modified my answer, that should solve your problem.
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    3. COThanks! Works perfectly and a great explanation :)
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