54 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			C++
		
	
	
	
			
		
		
	
	
			54 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			C++
		
	
	
	
| /*
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| * Copyright (c) 2006-2010 Erin Catto http://www.box2d.org
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| *
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| * This software is provided 'as-is', without any express or implied
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| * warranty.  In no event will the authors be held liable for any damages
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| * arising from the use of this software.
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| * Permission is granted to anyone to use this software for any purpose,
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| * including commercial applications, and to alter it and redistribute it
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| * freely, subject to the following restrictions:
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| * 1. The origin of this software must not be misrepresented; you must not
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| * claim that you wrote the original software. If you use this software
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| * in a product, an acknowledgment in the product documentation would be
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| * appreciated but is not required.
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| * 2. Altered source versions must be plainly marked as such, and must not be
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| * misrepresented as being the original software.
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| * 3. This notice may not be removed or altered from any source distribution.
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| */
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| 
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| #include "Box2D/Dynamics/Contacts/b2ChainAndCircleContact.h"
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| #include "Box2D/Common/b2BlockAllocator.h"
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| #include "Box2D/Dynamics/b2Fixture.h"
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| #include "Box2D/Collision/Shapes/b2ChainShape.h"
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| #include "Box2D/Collision/Shapes/b2EdgeShape.h"
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| 
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| #include <new>
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| 
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| b2Contact* b2ChainAndCircleContact::Create(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB, b2BlockAllocator* allocator)
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| {
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| 	void* mem = allocator->Allocate(sizeof(b2ChainAndCircleContact));
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| 	return new (mem) b2ChainAndCircleContact(fixtureA, indexA, fixtureB, indexB);
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| }
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| 
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| void b2ChainAndCircleContact::Destroy(b2Contact* contact, b2BlockAllocator* allocator)
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| {
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| 	((b2ChainAndCircleContact*)contact)->~b2ChainAndCircleContact();
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| 	allocator->Free(contact, sizeof(b2ChainAndCircleContact));
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| }
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| 
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| b2ChainAndCircleContact::b2ChainAndCircleContact(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB)
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| : b2Contact(fixtureA, indexA, fixtureB, indexB)
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| {
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| 	b2Assert(m_fixtureA->GetType() == b2Shape::e_chain);
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| 	b2Assert(m_fixtureB->GetType() == b2Shape::e_circle);
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| }
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| 
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| void b2ChainAndCircleContact::Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB)
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| {
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| 	b2ChainShape* chain = (b2ChainShape*)m_fixtureA->GetShape();
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| 	b2EdgeShape edge;
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| 	chain->GetChildEdge(&edge, m_indexA);
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| 	b2CollideEdgeAndCircle(	manifold, &edge, xfA,
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| 							(b2CircleShape*)m_fixtureB->GetShape(), xfB);
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| }
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