1 /*
2 * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
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/b2CircleContact.h>
20 #include <Box2D/Dynamics/b2Body.h>
21 #include <Box2D/Dynamics/b2Fixture.h>
22 #include <Box2D/Dynamics/b2WorldCallbacks.h>
23 #include <Box2D/Common/b2BlockAllocator.h>
24 #include <Box2D/Collision/b2TimeOfImpact.h>
25
26 #include <new>
27 using namespace std;
28
Create(b2Fixture * fixtureA,int32,b2Fixture * fixtureB,int32,b2BlockAllocator * allocator)29 b2Contact* b2CircleContact::Create(b2Fixture* fixtureA, int32, b2Fixture* fixtureB, int32, b2BlockAllocator* allocator)
30 {
31 void* mem = allocator->Allocate(sizeof(b2CircleContact));
32 return new (mem) b2CircleContact(fixtureA, fixtureB);
33 }
34
Destroy(b2Contact * contact,b2BlockAllocator * allocator)35 void b2CircleContact::Destroy(b2Contact* contact, b2BlockAllocator* allocator)
36 {
37 ((b2CircleContact*)contact)->~b2CircleContact();
38 allocator->Free(contact, sizeof(b2CircleContact));
39 }
40
b2CircleContact(b2Fixture * fixtureA,b2Fixture * fixtureB)41 b2CircleContact::b2CircleContact(b2Fixture* fixtureA, b2Fixture* fixtureB)
42 : b2Contact(fixtureA, 0, fixtureB, 0)
43 {
44 b2Assert(m_fixtureA->GetType() == b2Shape::e_circle);
45 b2Assert(m_fixtureB->GetType() == b2Shape::e_circle);
46 }
47
Evaluate(b2Manifold * manifold,const b2Transform & xfA,const b2Transform & xfB)48 void b2CircleContact::Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB)
49 {
50 b2CollideCircles(manifold,
51 (b2CircleShape*)m_fixtureA->GetShape(), xfA,
52 (b2CircleShape*)m_fixtureB->GetShape(), xfB);
53 }
54