text: ﻿/*
  * Copyright (c) 2006-2007 Erin Catto http:
  *
  * This software is provided 'as-is', without any express or implied
  * warranty.  In no event will the authors be held liable for any damages
  * arising from the use of this software.
  * Permission is granted to anyone to use this software for any purpose,
  * including commercial applications, and to alter it and redistribute it
  * freely, subject to the following restrictions:
  * 1. The origin of this software must not be misrepresented; you must not
  * claim that you wrote the original software. If you use this software
  * in a product, an acknowledgment in the product documentation would be
  * appreciated but is not required.
  * 2. Altered source versions must be plainly marked, and must not be
  * misrepresented the original software.
  * 3. This notice may not be removed or altered from any source distribution.
  */
  
  
  
  // We use contact ids to facilitate warm starting.
  var b2ContactID = Class.create();
  b2ContactID.prototype = 
  {
  	initialize: function(){
  		// initialize instance variables for references
  		this.features = new Features();
  		//
  
  		this.features._m_id = this;
  
  	},
  	Set: function(id){
  		this.set_key(id._key);
  	},
  	Copy: function(){
  		var id = new b2ContactID();
  		id.set_key(this._key);
  		return id;
  	},
  	get_key: function(){
  		return this._key;
  	},
  	set_key: function(value) {
  		this._key = value;
  		this.features._referenceFace = this._key & 0x000000ff;
  		this.features._incidentEdge = ((this._key & 0x0000ff00) >> 8) & 0x000000ff;
  		this.features._incidentVertex = ((this._key & 0x00ff0000) >> 16) & 0x000000ff;
  		this.features._flip = ((this._key & 0xff000000) >> 24) & 0x000000ff;
  	},
  	features: new Features(),
  	_key: 0};
  