topical media & game development

talk show tell print

graphic-o3d-samples-box2d-3d-third-party-box2d-dynamics-contacts-b2PolyAndCircleContact.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.
*/

var b2PolyAndCircleContact = Class.create();
Object.extend(b2PolyAndCircleContact.prototype, b2Contact.prototype);
Object.extend(b2PolyAndCircleContact.prototype, {

                initialize: function(s1, s2) {
                // The constructor for b2Contact
                // initialize instance variables for references
                this.m_node1 = new b2ContactNode();
                this.m_node2 = new b2ContactNode();
                //
                this.m_flags = 0;

                if (!s1 || !s2){
                        this.m_shape1 = null;
                        this.m_shape2 = null;
                        return;
                }

                this.m_shape1 = s1;
                this.m_shape2 = s2;

                this.m_manifoldCount = 0;

                this.m_friction = Math.sqrt(this.m_shape1.m_friction * this.m_shape2.m_friction);
                this.m_restitution = b2Math.b2Max(this.m_shape1.m_restitution, this.m_shape2.m_restitution);

                this.m_prev = null;
                this.m_next = null;

                this.m_node1.contact = null;
                this.m_node1.prev = null;
                this.m_node1.next = null;
                this.m_node1.other = null;

                this.m_node2.contact = null;
                this.m_node2.prev = null;
                this.m_node2.next = null;
                this.m_node2.other = null;
                //

                // initialize instance variables for references
                this.m_manifold = [new b2Manifold()];
                //

                //super(shape1, shape2);

                b2Settings.b2Assert(this.m_shape1.m_type == b2Shape.e_polyShape);
                b2Settings.b2Assert(this.m_shape2.m_type == b2Shape.e_circleShape);
                this.m_manifold[0].pointCount = 0;
                this.m_manifold[0].points[0].normalImpulse = 0.0;
                this.m_manifold[0].points[0].tangentImpulse = 0.0;
        },
        //~b2PolyAndCircleContact() {}

        Evaluate: function(){
                b2Collision.b2CollidePolyAndCircle(this.m_manifold[0], this.m_shape1, this.m_shape2, false);

                if (this.m_manifold[0].pointCount > 0)
                {
                        this.m_manifoldCount = 1;
                }
                else
                {
                        this.m_manifoldCount = 0;
                }
        },

        GetManifolds: function()
        {
                return this.m_manifold;
        },

        m_manifold: [new b2Manifold()]})

b2PolyAndCircleContact.Create = function(shape1, shape2, allocator){
                return new b2PolyAndCircleContact(shape1, shape2);
        };
b2PolyAndCircleContact.Destroy = function(contact, allocator){
                //
        };



  *
  * 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.
  */
  
  var b2PolyAndCircleContact = Class.create();
  Object.extend(b2PolyAndCircleContact.prototype, b2Contact.prototype);
  Object.extend(b2PolyAndCircleContact.prototype, {
  
                  initialize: function(s1, s2) {
                  // The constructor for b2Contact
                  // initialize instance variables for references
                  this.m_node1 = new b2ContactNode();
                  this.m_node2 = new b2ContactNode();
                  //
                  this.m_flags = 0;
  
                  if (!s1 || !s2){
                          this.m_shape1 = null;
                          this.m_shape2 = null;
                          return;
                  }
  
                  this.m_shape1 = s1;
                  this.m_shape2 = s2;
  
                  this.m_manifoldCount = 0;
  
                  this.m_friction = Math.sqrt(this.m_shape1.m_friction * this.m_shape2.m_friction);
                  this.m_restitution = b2Math.b2Max(this.m_shape1.m_restitution, this.m_shape2.m_restitution);
  
                  this.m_prev = null;
                  this.m_next = null;
  
                  this.m_node1.contact = null;
                  this.m_node1.prev = null;
                  this.m_node1.next = null;
                  this.m_node1.other = null;
  
                  this.m_node2.contact = null;
                  this.m_node2.prev = null;
                  this.m_node2.next = null;
                  this.m_node2.other = null;
                  //
  
                  // initialize instance variables for references
                  this.m_manifold = [new b2Manifold()];
                  //
  
                  //super(shape1, shape2);
  
                  b2Settings.b2Assert(this.m_shape1.m_type == b2Shape.e_polyShape);
                  b2Settings.b2Assert(this.m_shape2.m_type == b2Shape.e_circleShape);
                  this.m_manifold[0].pointCount = 0;
                  this.m_manifold[0].points[0].normalImpulse = 0.0;
                  this.m_manifold[0].points[0].tangentImpulse = 0.0;
          },
          //~b2PolyAndCircleContact() {}
  
          Evaluate: function(){
                  b2Collision.b2CollidePolyAndCircle(this.m_manifold[0], this.m_shape1, this.m_shape2, false);
  
                  if (this.m_manifold[0].pointCount > 0)
                  {
                          this.m_manifoldCount = 1;
                  }
                  else
                  {
                          this.m_manifoldCount = 0;
                  }
          },
  
          GetManifolds: function()
          {
                  return this.m_manifold;
          },
  
          m_manifold: [new b2Manifold()]})
  
  b2PolyAndCircleContact.Create = function(shape1, shape2, allocator){
                  return new b2PolyAndCircleContact(shape1, shape2);
          };
  b2PolyAndCircleContact.Destroy = function(contact, allocator){
                  //
          };
  


(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.