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/*
* 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.
*/
//typedef b2Contact* b2ContactCreateFcn(b2Shape* shape1, b2Shape* shape2, b2BlockAllocator* allocator);
//typedef void b2ContactDestroyFcn(b2Contact* contact, b2BlockAllocator* allocator);
var b2Contact = Class.create();
b2Contact.prototype =
{
GetManifolds: function(){return null},
GetManifoldCount: function()
{
return this.m_manifoldCount;
},
GetNext: function(){
return this.m_next;
},
GetShape1: function(){
return this.m_shape1;
},
GetShape2: function(){
return this.m_shape2;
},
//--------------- Internals Below -------------------
// this.m_flags
// enum
initialize: function(s1, s2)
{
// 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;
},
//virtual ~b2Contact() {}
Evaluate: function(){},
m_flags: 0,
// World pool and list pointers.
m_prev: null,
m_next: null,
// Nodes for connecting bodies.
m_node1: new b2ContactNode(),
m_node2: new b2ContactNode(),
m_shape1: null,
m_shape2: null,
m_manifoldCount: 0,
// Combined friction
m_friction: null,
m_restitution: null};
b2Contact.e_islandFlag = 0x0001;
b2Contact.e_destroyFlag = 0x0002;
b2Contact.AddType = function(createFcn, destroyFcn, type1, type2)
{
//b2Settings.b2Assert(b2Shape.e_unknownShape < type1 && type1 < b2Shape.e_shapeTypeCount);
//b2Settings.b2Assert(b2Shape.e_unknownShape < type2 && type2 < b2Shape.e_shapeTypeCount);
b2Contact.s_registers[type1][type2].createFcn = createFcn;
b2Contact.s_registers[type1][type2].destroyFcn = destroyFcn;
b2Contact.s_registers[type1][type2].primary = true;
if (type1 != type2)
{
b2Contact.s_registers[type2][type1].createFcn = createFcn;
b2Contact.s_registers[type2][type1].destroyFcn = destroyFcn;
b2Contact.s_registers[type2][type1].primary = false;
}
};
b2Contact.InitializeRegisters = function(){
b2Contact.s_registers = new Array(b2Shape.e_shapeTypeCount);
for (var i = 0; i < b2Shape.e_shapeTypeCount; i++){
b2Contact.s_registers[i] = new Array(b2Shape.e_shapeTypeCount);
for (var j = 0; j < b2Shape.e_shapeTypeCount; j++){
b2Contact.s_registers[i][j] = new b2ContactRegister();
}
}
b2Contact.AddType(b2CircleContact.Create, b2CircleContact.Destroy, b2Shape.e_circleShape, b2Shape.e_circleShape);
b2Contact.AddType(b2PolyAndCircleContact.Create, b2PolyAndCircleContact.Destroy, b2Shape.e_polyShape, b2Shape.e_circleShape);
b2Contact.AddType(b2PolyContact.Create, b2PolyContact.Destroy, b2Shape.e_polyShape, b2Shape.e_polyShape);
};
b2Contact.Create = function(shape1, shape2, allocator){
if (b2Contact.s_initialized == false)
{
b2Contact.InitializeRegisters();
b2Contact.s_initialized = true;
}
var type1 = shape1.m_type;
var type2 = shape2.m_type;
//b2Settings.b2Assert(b2Shape.e_unknownShape < type1 && type1 < b2Shape.e_shapeTypeCount);
//b2Settings.b2Assert(b2Shape.e_unknownShape < type2 && type2 < b2Shape.e_shapeTypeCount);
var createFcn = b2Contact.s_registers[type1][type2].createFcn;
if (createFcn)
{
if (b2Contact.s_registers[type1][type2].primary)
{
return createFcn(shape1, shape2, allocator);
}
else
{
var c = createFcn(shape2, shape1, allocator);
for (var i = 0; i < c.GetManifoldCount(); ++i)
{
var m = c.GetManifolds()[ i ];
m.normal = m.normal.Negative();
}
return c;
}
}
else
{
return null;
}
};
b2Contact.Destroy = function(contact, allocator){
//b2Settings.b2Assert(b2Contact.s_initialized == true);
if (contact.GetManifoldCount() > 0)
{
contact.m_shape1.m_body.WakeUp();
contact.m_shape2.m_body.WakeUp();
}
var type1 = contact.m_shape1.m_type;
var type2 = contact.m_shape2.m_type;
//b2Settings.b2Assert(b2Shape.e_unknownShape < type1 && type1 < b2Shape.e_shapeTypeCount);
//b2Settings.b2Assert(b2Shape.e_unknownShape < type2 && type2 < b2Shape.e_shapeTypeCount);
var destroyFcn = b2Contact.s_registers[type1][type2].destroyFcn;
destroyFcn(contact, allocator);
};
b2Contact.s_registers = null;
b2Contact.s_initialized = false;
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