b2Contact Class Reference

#include <b2Contact.h>

Inheritance diagram for b2Contact:

Public Member Functions
b2Manifold *	GetManifold ()
const b2Manifold *	GetManifold () const
void	GetWorldManifold (b2WorldManifold *worldManifold) const
	Get the world manifold.
bool	IsTouching () const
	Is this contact touching?
void	SetEnabled (bool flag)
bool	IsEnabled () const
	Has this contact been disabled?
b2Contact *	GetNext ()
	Get the next contact in the world's contact list.
const b2Contact *	GetNext () const
b2Fixture *	GetFixtureA ()
	Get the first fixture in this contact.
const b2Fixture *	GetFixtureA () const
b2Fixture *	GetFixtureB ()
	Get the second fixture in this contact.
const b2Fixture *	GetFixtureB () const
virtual void	Evaluate (b2Manifold *manifold, const b2Transform &xfA, const b2Transform &xfB)=0
	Evaluate this contact with your own manifold and transforms.
Protected Types
enum	{ e_islandFlag = 0x0001, e_touchingFlag = 0x0002, e_enabledFlag = 0x0004, e_filterFlag = 0x0008 }
Protected Member Functions
void	FlagForFiltering ()
	Flag this contact for filtering. Filtering will occur the next time step.
	b2Contact ()
	b2Contact (b2Fixture fixtureA, b2Fixture fixtureB)
virtual	~b2Contact ()
void	Update (b2ContactListener *listener)
Static Protected Member Functions
static void	AddType (b2ContactCreateFcn createFcn, b2ContactDestroyFcn destroyFcn, b2Shape::Type typeA, b2Shape::Type typeB)
static void	InitializeRegisters ()
static b2Contact *	Create (b2Fixture fixtureA, b2Fixture fixtureB, b2BlockAllocator *allocator)
static void	Destroy (b2Contact contact, b2Shape::Type typeA, b2Shape::Type typeB, b2BlockAllocator allocator)
static void	Destroy (b2Contact contact, b2BlockAllocator allocator)
Protected Attributes
uint32	m_flags
b2Contact *	m_prev
b2Contact *	m_next
b2ContactEdge	m_nodeA
b2ContactEdge	m_nodeB
b2Fixture *	m_fixtureA
b2Fixture *	m_fixtureB
b2Manifold	m_manifold
int32	m_toiCount
Static Protected Attributes
static b2ContactRegister	s_registers [b2Shape::e_typeCount][b2Shape::e_typeCount]
static bool	s_initialized = false
Friends
class	b2ContactManager
class	b2World
class	b2ContactSolver
class	b2Body
class	b2Fixture

Detailed Description

The class manages contact between two shapes. A contact exists for each overlapping AABB in the broad-phase (except if filtered). Therefore a contact object may exist that has no contact points.

Member Enumeration Documentation

anonymous enum [protected]

Enumerator:

e_islandFlag
e_touchingFlag
e_enabledFlag
e_filterFlag

Constructor & Destructor Documentation

b2Contact::b2Contact ( ) [inline, protected]

b2Contact::b2Contact	(	b2Fixture *	fixtureA,
		b2Fixture *	fixtureB
	)			`[protected]`

virtual b2Contact::~b2Contact ( ) [inline, protected, virtual]

Member Function Documentation

void b2Contact::AddType	(	b2ContactCreateFcn *	createFcn,
		b2ContactDestroyFcn *	destroyFcn,
		b2Shape::Type	typeA,
		b2Shape::Type	typeB
	)			`[static, protected]`

b2Contact * b2Contact::Create	(	b2Fixture *	fixtureA,
		b2Fixture *	fixtureB,
		b2BlockAllocator *	allocator
	)			`[static, protected]`

Reimplemented in b2CircleContact, b2PolygonAndCircleContact, and b2PolygonContact.

void b2Contact::Destroy	(	b2Contact *	contact,
		b2BlockAllocator *	allocator
	)			`[static, protected]`

Reimplemented in b2CircleContact, b2PolygonAndCircleContact, and b2PolygonContact.

static void b2Contact::Destroy	(	b2Contact *	contact,
		b2Shape::Type	typeA,
		b2Shape::Type	typeB,
		b2BlockAllocator *	allocator
	)			`[static, protected]`

virtual void b2Contact::Evaluate	(	b2Manifold *	manifold,
		const b2Transform &	xfA,
		const b2Transform &	xfB
	)			`[pure virtual]`

Evaluate this contact with your own manifold and transforms.

Implemented in b2CircleContact, b2PolygonAndCircleContact, and b2PolygonContact.

void b2Contact::FlagForFiltering ( ) [inline, protected]

Flag this contact for filtering. Filtering will occur the next time step.

const b2Fixture * b2Contact::GetFixtureA ( ) const [inline]

b2Fixture * b2Contact::GetFixtureA ( ) [inline]

Get the first fixture in this contact.

const b2Fixture * b2Contact::GetFixtureB ( ) const [inline]

b2Fixture * b2Contact::GetFixtureB ( ) [inline]

Get the second fixture in this contact.

const b2Manifold * b2Contact::GetManifold ( ) const [inline]

b2Manifold * b2Contact::GetManifold ( ) [inline]

Get the contact manifold. Do not modify the manifold unless you understand the internals of Box2D.

const b2Contact * b2Contact::GetNext ( ) const [inline]

b2Contact * b2Contact::GetNext ( ) [inline]

Get the next contact in the world's contact list.

void b2Contact::GetWorldManifold ( b2WorldManifold * worldManifold ) const [inline]

Get the world manifold.

void b2Contact::InitializeRegisters ( ) [static, protected]

bool b2Contact::IsEnabled ( ) const [inline]

Has this contact been disabled?

bool b2Contact::IsTouching ( ) const [inline]

Is this contact touching?

void b2Contact::SetEnabled ( bool flag ) [inline]

Enable/disable this contact. This can be used inside the pre-solve contact listener. The contact is only disabled for the current time step (or sub-step in continuous collisions).

void b2Contact::Update ( b2ContactListener * listener ) [protected]