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- #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);
- }
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