Updated to Box2D 2.3.0
[qml-box2d:qml-box2d-folibis.git] / Box2D / Dynamics / Contacts / b2ChainAndPolygonContact.cpp
1 /*
2 * Copyright (c) 2006-2010 Erin Catto http://www.box2d.org
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty.  In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 * 1. The origin of this software must not be misrepresented; you must not
11 * claim that you wrote the original software. If you use this software
12 * in a product, an acknowledgment in the product documentation would be
13 * appreciated but is not required.
14 * 2. Altered source versions must be plainly marked as such, and must not be
15 * misrepresented as being the original software.
16 * 3. This notice may not be removed or altered from any source distribution.
17 */
18
19 #include <Box2D/Dynamics/Contacts/b2ChainAndPolygonContact.h>
20 #include <Box2D/Common/b2BlockAllocator.h>
21 #include <Box2D/Dynamics/b2Fixture.h>
22 #include <Box2D/Collision/Shapes/b2ChainShape.h>
23 #include <Box2D/Collision/Shapes/b2EdgeShape.h>
24
25 #include <new>
26
27 b2Contact* b2ChainAndPolygonContact::Create(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB, b2BlockAllocator* allocator)
28 {
29         void* mem = allocator->Allocate(sizeof(b2ChainAndPolygonContact));
30         return new (mem) b2ChainAndPolygonContact(fixtureA, indexA, fixtureB, indexB);
31 }
32
33 void b2ChainAndPolygonContact::Destroy(b2Contact* contact, b2BlockAllocator* allocator)
34 {
35         ((b2ChainAndPolygonContact*)contact)->~b2ChainAndPolygonContact();
36         allocator->Free(contact, sizeof(b2ChainAndPolygonContact));
37 }
38
39 b2ChainAndPolygonContact::b2ChainAndPolygonContact(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB)
40 : b2Contact(fixtureA, indexA, fixtureB, indexB)
41 {
42         b2Assert(m_fixtureA->GetType() == b2Shape::e_chain);
43         b2Assert(m_fixtureB->GetType() == b2Shape::e_polygon);
44 }
45
46 void b2ChainAndPolygonContact::Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB)
47 {
48         b2ChainShape* chain = (b2ChainShape*)m_fixtureA->GetShape();
49         b2EdgeShape edge;
50         chain->GetChildEdge(&edge, m_indexA);
51         b2CollideEdgeAndPolygon(        manifold, &edge, xfA,
52                                                                 (b2PolygonShape*)m_fixtureB->GetShape(), xfB);
53 }