54 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			C++
		
	
	
	
		
		
			
		
	
	
			54 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			C++
		
	
	
	
|  | /*
 | ||
|  | * Copyright (c) 2006-2010 Erin Catto http://www.box2d.org
 | ||
|  | * | ||
|  | * 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 as such, and must not be | ||
|  | * misrepresented as being the original software. | ||
|  | * 3. This notice may not be removed or altered from any source distribution. | ||
|  | */ | ||
|  | 
 | ||
|  | #include "Box2D/Dynamics/Contacts/b2ChainAndCircleContact.h"
 | ||
|  | #include "Box2D/Common/b2BlockAllocator.h"
 | ||
|  | #include "Box2D/Dynamics/b2Fixture.h"
 | ||
|  | #include "Box2D/Collision/Shapes/b2ChainShape.h"
 | ||
|  | #include "Box2D/Collision/Shapes/b2EdgeShape.h"
 | ||
|  | 
 | ||
|  | #include <new>
 | ||
|  | 
 | ||
|  | b2Contact* b2ChainAndCircleContact::Create(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB, b2BlockAllocator* allocator) | ||
|  | { | ||
|  | 	void* mem = allocator->Allocate(sizeof(b2ChainAndCircleContact)); | ||
|  | 	return new (mem) b2ChainAndCircleContact(fixtureA, indexA, fixtureB, indexB); | ||
|  | } | ||
|  | 
 | ||
|  | void b2ChainAndCircleContact::Destroy(b2Contact* contact, b2BlockAllocator* allocator) | ||
|  | { | ||
|  | 	((b2ChainAndCircleContact*)contact)->~b2ChainAndCircleContact(); | ||
|  | 	allocator->Free(contact, sizeof(b2ChainAndCircleContact)); | ||
|  | } | ||
|  | 
 | ||
|  | b2ChainAndCircleContact::b2ChainAndCircleContact(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB) | ||
|  | : b2Contact(fixtureA, indexA, fixtureB, indexB) | ||
|  | { | ||
|  | 	b2Assert(m_fixtureA->GetType() == b2Shape::e_chain); | ||
|  | 	b2Assert(m_fixtureB->GetType() == b2Shape::e_circle); | ||
|  | } | ||
|  | 
 | ||
|  | void b2ChainAndCircleContact::Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB) | ||
|  | { | ||
|  | 	b2ChainShape* chain = (b2ChainShape*)m_fixtureA->GetShape(); | ||
|  | 	b2EdgeShape edge; | ||
|  | 	chain->GetChildEdge(&edge, m_indexA); | ||
|  | 	b2CollideEdgeAndCircle(	manifold, &edge, xfA, | ||
|  | 							(b2CircleShape*)m_fixtureB->GetShape(), xfB); | ||
|  | } |