b2CircleContact.cpp
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上传日期:2022-01-07
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- /*
- * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
- *
- * 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/b2CircleContact.h>
- #include <Box2D/Dynamics/b2Body.h>
- #include <Box2D/Dynamics/b2Fixture.h>
- #include <Box2D/Dynamics/b2WorldCallbacks.h>
- #include <Box2D/Common/b2BlockAllocator.h>
- #include <Box2D/Collision/b2TimeOfImpact.h>
- #include <new>
- b2Contact* b2CircleContact::Create(b2Fixture* fixtureA, b2Fixture* fixtureB, b2BlockAllocator* allocator)
- {
- void* mem = allocator->Allocate(sizeof(b2CircleContact));
- return new (mem) b2CircleContact(fixtureA, fixtureB);
- }
- void b2CircleContact::Destroy(b2Contact* contact, b2BlockAllocator* allocator)
- {
- ((b2CircleContact*)contact)->~b2CircleContact();
- allocator->Free(contact, sizeof(b2CircleContact));
- }
- b2CircleContact::b2CircleContact(b2Fixture* fixtureA, b2Fixture* fixtureB)
- : b2Contact(fixtureA, fixtureB)
- {
- b2Assert(m_fixtureA->GetType() == b2Shape::e_circle);
- b2Assert(m_fixtureB->GetType() == b2Shape::e_circle);
- }
- void b2CircleContact::Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB)
- {
- b2CollideCircles(manifold,
- (b2CircleShape*)m_fixtureA->GetShape(), xfA,
- (b2CircleShape*)m_fixtureB->GetShape(), xfB);
- }