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graphic-o3d-samples-box2d-3d-third-party-box2d-dynamics-joints-b2PulleyJointDef.js / js



  /*
  * Copyright (c) 2006-2007 Erin Catto 
* 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.

var b2PulleyJointDef = Class.create();
Object.extend(b2PulleyJointDef.prototype, b2JointDef.prototype);
Object.extend(b2PulleyJointDef.prototype, 
{
        initialize: 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;
        },

        groundPoint1: new b2Vec2(),
        groundPoint2: new b2Vec2(),
        anchorPoint1: new b2Vec2(),
        anchorPoint2: new b2Vec2(),
        maxLength1: null,
        maxLength2: null,
        ratio: null});




  *
  * 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.
  
  var b2PulleyJointDef = Class.create();
  Object.extend(b2PulleyJointDef.prototype, b2JointDef.prototype);
  Object.extend(b2PulleyJointDef.prototype, 
  {
          initialize: 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;
          },
  
          groundPoint1: new b2Vec2(),
          groundPoint2: new b2Vec2(),
          anchorPoint1: new b2Vec2(),
          anchorPoint2: new b2Vec2(),
          maxLength1: null,
          maxLength2: null,
          ratio: null});
  
  


(C) Æliens 20/2/2008

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.