code: function getNextObjectInPool() {
  
  		var object;
  
  		if ( _objectCount === _objectPool.length ) {
  
  			object = new THREE.RenderableObject();
  			_objectPool.push( object );
  
  		} else {
  
  			object =  _objectPool[ _objectCount ];
  
  		}
  
  		_objectCount ++;
  
  		return object;
  
  	}
docs: Pools