#include <b2Contact.h>

Inheritance diagram for b2Contact:

Public Member Functions
virtual void	Evaluate (b2Manifold *manifold, const b2Transform &xfA, const b2Transform &xfB)=0
	Evaluate this contact with your own manifold and transforms.
int32	GetChildIndexA () const
	Get the child primitive index for fixture A.
int32	GetChildIndexB () const
	Get the child primitive index for fixture B.
b2Fixture *	GetFixtureA ()
	Get fixture A in this contact.
const b2Fixture *	GetFixtureA () const
b2Fixture *	GetFixtureB ()
	Get fixture B in this contact.
const b2Fixture *	GetFixtureB () const
float32	GetFriction () const
	Get the friction.
b2Manifold *	GetManifold ()
const b2Manifold *	GetManifold () const
b2Contact *	GetNext ()
	Get the next contact in the world's contact list.
const b2Contact *	GetNext () const
float32	GetRestitution () const
	Get the restitution.
float32	GetTangentSpeed () const
	Get the desired tangent speed. In meters per second.
void	GetWorldManifold (b2WorldManifold *worldManifold) const
	Get the world manifold.
bool	IsEnabled () const
	Has this contact been disabled?
bool	IsTouching () const
	Is this contact touching?
void	ResetFriction ()
	Reset the friction mixture to the default value.
void	ResetRestitution ()
	Reset the restitution to the default value.
void	SetEnabled (bool flag)
void	SetFriction (float32 friction)
void	SetRestitution (float32 restitution)
void	SetTangentSpeed (float32 speed)
	Set the desired tangent speed for a conveyor belt behavior. In meters per second.
Protected Types
enum	{ e_islandFlag = 0x0001, e_touchingFlag = 0x0002, e_enabledFlag = 0x0004, e_filterFlag = 0x0008, e_bulletHitFlag = 0x0010, e_toiFlag = 0x0020 }
Protected Member Functions
	b2Contact ()
	b2Contact (b2Fixture fixtureA, int32 indexA, b2Fixture fixtureB, int32 indexB)
void	FlagForFiltering ()
	Flag this contact for filtering. Filtering will occur the next time step.
void	Update (b2ContactListener *listener)
virtual	~b2Contact ()
Static Protected Member Functions
static void	AddType (b2ContactCreateFcn createFcn, b2ContactDestroyFcn destroyFcn, b2Shape::Type typeA, b2Shape::Type typeB)
static b2Contact *	Create (b2Fixture fixtureA, int32 indexA, b2Fixture fixtureB, int32 indexB, b2BlockAllocator *allocator)
static void	Destroy (b2Contact contact, b2Shape::Type typeA, b2Shape::Type typeB, b2BlockAllocator allocator)
static void	Destroy (b2Contact contact, b2BlockAllocator allocator)
static void	InitializeRegisters ()
Protected Attributes
b2Fixture *	m_fixtureA
b2Fixture *	m_fixtureB
uint32	m_flags
float32	m_friction
int32	m_indexA
int32	m_indexB
b2Manifold	m_manifold
b2Contact *	m_next
b2ContactEdge	m_nodeA
b2ContactEdge	m_nodeB
b2Contact *	m_prev
float32	m_restitution
float32	m_tangentSpeed
float32	m_toi
int32	m_toiCount
Static Protected Attributes
static bool	s_initialized = false
static b2ContactRegister	s_registers [b2Shape::e_typeCount][b2Shape::e_typeCount]
Friends
class	b2Body
class	b2ContactManager
class	b2ContactSolver
class	b2Fixture
class	b2World

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.

Definition at line 77 of file b2Contact.h.

Member Enumeration Documentation

anonymous enum [protected]

Enumerator:

e_islandFlag
e_touchingFlag
e_enabledFlag
e_filterFlag
e_bulletHitFlag
e_toiFlag

Definition at line 155 of file b2Contact.h.

Constructor & Destructor Documentation

b2Contact::b2Contact ( ) [inline, protected]

Definition at line 186 of file b2Contact.h.

b2Contact::b2Contact	(	b2Fixture *	fixtureA,
		int32	indexA,
		b2Fixture *	fixtureB,
		int32	indexB
	)		`[protected]`

Definition at line 126 of file b2Contact.cpp.

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

Definition at line 188 of file b2Contact.h.

Member Function Documentation

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

Definition at line 51 of file b2Contact.cpp.

b2Contact * b2Contact::Create	(	b2Fixture *	fixtureA,
		int32	indexA,
		b2Fixture *	fixtureB,
		int32	indexB,
		b2BlockAllocator *	allocator
	)		`[static, protected]`

Reimplemented in b2ChainAndCircleContact, b2ChainAndPolygonContact, b2CircleContact, b2EdgeAndCircleContact, b2EdgeAndPolygonContact, b2PolygonContact, and b2PolygonAndCircleContact.

Definition at line 69 of file b2Contact.cpp.

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

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

Reimplemented in b2ChainAndCircleContact, b2ChainAndPolygonContact, b2CircleContact, b2EdgeAndCircleContact, b2EdgeAndPolygonContact, b2PolygonContact, and b2PolygonAndCircleContact.

Definition at line 101 of file b2Contact.cpp.

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 b2ChainAndCircleContact, b2ChainAndPolygonContact, b2CircleContact, b2EdgeAndCircleContact, b2EdgeAndPolygonContact, b2PolygonContact, and b2PolygonAndCircleContact.

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

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

Definition at line 304 of file b2Contact.h.

int32 b2Contact::GetChildIndexA ( ) const [inline]

Get the child primitive index for fixture A.

Definition at line 289 of file b2Contact.h.

int32 b2Contact::GetChildIndexB ( ) const [inline]

Get the child primitive index for fixture B.

Definition at line 299 of file b2Contact.h.

b2Fixture * b2Contact::GetFixtureA ( ) [inline]

Get fixture A in this contact.

Definition at line 274 of file b2Contact.h.

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

Definition at line 279 of file b2Contact.h.

b2Fixture * b2Contact::GetFixtureB ( ) [inline]

Get fixture B in this contact.

Definition at line 284 of file b2Contact.h.

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

Definition at line 294 of file b2Contact.h.

float32 b2Contact::GetFriction ( ) const [inline]

Get the friction.

Definition at line 314 of file b2Contact.h.

b2Manifold * b2Contact::GetManifold ( ) [inline]

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

Definition at line 222 of file b2Contact.h.

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

Definition at line 227 of file b2Contact.h.

b2Contact * b2Contact::GetNext ( ) [inline]

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

Definition at line 264 of file b2Contact.h.

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

Definition at line 269 of file b2Contact.h.

float32 b2Contact::GetRestitution ( ) const [inline]

Get the restitution.

Definition at line 329 of file b2Contact.h.

float32 b2Contact::GetTangentSpeed ( ) const [inline]

Get the desired tangent speed. In meters per second.

Definition at line 344 of file b2Contact.h.

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

Get the world manifold.

Definition at line 232 of file b2Contact.h.

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

Definition at line 40 of file b2Contact.cpp.

bool b2Contact::IsEnabled ( ) const [inline]

Has this contact been disabled?

Definition at line 254 of file b2Contact.h.

bool b2Contact::IsTouching ( ) const [inline]

Is this contact touching?

Definition at line 259 of file b2Contact.h.

void b2Contact::ResetFriction ( ) [inline]

Reset the friction mixture to the default value.

Definition at line 319 of file b2Contact.h.

void b2Contact::ResetRestitution ( ) [inline]

Reset the restitution to the default value.

Definition at line 334 of file b2Contact.h.

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).

Definition at line 242 of file b2Contact.h.

void b2Contact::SetFriction ( float32 friction ) [inline]

Override the default friction mixture. You can call this in b2ContactListener::PreSolve. This value persists until set or reset.

Definition at line 309 of file b2Contact.h.

void b2Contact::SetRestitution ( float32 restitution ) [inline]

Override the default restitution mixture. You can call this in b2ContactListener::PreSolve. The value persists until you set or reset.

Definition at line 324 of file b2Contact.h.

void b2Contact::SetTangentSpeed ( float32 speed ) [inline]

Set the desired tangent speed for a conveyor belt behavior. In meters per second.

Definition at line 339 of file b2Contact.h.

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

Definition at line 161 of file b2Contact.cpp.