/*
* 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.
*/

/**
 * The pulley joint is connected to two bodies and two fixed ground points.
 * 
 * The pulley supports a ratio such that:
 * length1 + ratio * length2 = constant
 * Yes, the force transmitted is scaled by the ratio.
 * The pulley also enforces a maximum length limit on both sides. This is
 * useful to prevent one side of the pulley hitting the top.
 * 
 * @class b2PulleyJointDef
 * @constructor
 */
var b2PulleyJointDef = function () {
    // The constructor for b2JointDef
	this.type = b2Joint.e_unknownJoint;
	this.userData = null;
	this.body1 = null;
	this.body2 = null;
	this.collideConnected = false;
	//

	// initialize instance variables for references
	this.groundPoint1 = new b2Vec2();
	this.groundPoint2 = new b2Vec2();
	this.anchorPoint1 = new b2Vec2();
	this.anchorPoint2 = new b2Vec2();
	//

	this.type = b2Joint.e_pulleyJoint;
	this.groundPoint1.Set(-1.0, 1.0);
	this.groundPoint2.Set(1.0, 1.0);
	this.anchorPoint1.Set(-1.0, 0.0);
	this.anchorPoint2.Set(1.0, 0.0);
	this.maxLength1 = 0.5 * b2PulleyJoint.b2_minPulleyLength;
	this.maxLength2 = 0.5 * b2PulleyJoint.b2_minPulleyLength;
	this.ratio = 1.0;
	this.collideConnected = true;
};

Object.extend(b2PulleyJointDef.prototype, b2JointDef.prototype);
Object.extend(b2PulleyJointDef.prototype, 
{
	groundPoint1: new b2Vec2(),
	groundPoint2: new b2Vec2(),
	anchorPoint1: new b2Vec2(),
	anchorPoint2: new b2Vec2(),
	maxLength1: null,
	maxLength2: null,
	ratio: null
});