b2Fixture Class Reference

#include <b2Fixture.h>

Public Member Functions
b2Shape::Type	GetType () const
b2Shape *	GetShape ()
const b2Shape *	GetShape () const
void	SetSensor (bool sensor)
	Set if this fixture is a sensor.
bool	IsSensor () const
void	SetFilterData (const b2Filter &filter)
const b2Filter &	GetFilterData () const
	Get the contact filtering data.
b2Body *	GetBody ()
const b2Body *	GetBody () const
b2Fixture *	GetNext ()
const b2Fixture *	GetNext () const
void *	GetUserData () const
void	SetUserData (void *data)
	Set the user data. Use this to store your application specific data.
bool	TestPoint (const b2Vec2 &p) const
bool	RayCast (b2RayCastOutput *output, const b2RayCastInput &input) const
void	GetMassData (b2MassData *massData) const
void	SetDensity (float32 density)
float32	GetDensity () const
	Get the density of this fixture.
float32	GetFriction () const
	Get the coefficient of friction.
void	SetFriction (float32 friction)
	Set the coefficient of friction.
float32	GetRestitution () const
	Get the coefficient of restitution.
void	SetRestitution (float32 restitution)
	Set the coefficient of restitution.
const b2AABB &	GetAABB () const
Protected Member Functions
	b2Fixture ()
	~b2Fixture ()
void	Create (b2BlockAllocator allocator, b2Body body, const b2FixtureDef *def)
void	Destroy (b2BlockAllocator *allocator)
void	CreateProxy (b2BroadPhase *broadPhase, const b2Transform &xf)
void	DestroyProxy (b2BroadPhase *broadPhase)
void	Synchronize (b2BroadPhase *broadPhase, const b2Transform &xf1, const b2Transform &xf2)
Protected Attributes
b2AABB	m_aabb
float32	m_density
b2Fixture *	m_next
b2Body *	m_body
b2Shape *	m_shape
float32	m_friction
float32	m_restitution
int32	m_proxyId
b2Filter	m_filter
bool	m_isSensor
void *	m_userData
Friends
class	b2Body
class	b2World
class	b2Contact
class	b2ContactManager

Detailed Description

A fixture is used to attach a shape to a body for collision detection. A fixture inherits its transform from its parent. Fixtures hold additional non-geometric data such as friction, collision filters, etc. Fixtures are created via b2Body::CreateFixture.

Warning:: you cannot reuse fixtures.

Constructor & Destructor Documentation

b2Fixture::b2Fixture ( ) [protected]

b2Fixture::~b2Fixture ( ) [protected]

Member Function Documentation

void b2Fixture::Create	(	b2BlockAllocator *	allocator,
		b2Body *	body,
		const b2FixtureDef *	def
	)			`[protected]`

void b2Fixture::CreateProxy	(	b2BroadPhase *	broadPhase,
		const b2Transform &	xf
	)			`[protected]`

void b2Fixture::Destroy ( b2BlockAllocator * allocator ) [protected]

void b2Fixture::DestroyProxy ( b2BroadPhase * broadPhase ) [protected]

const b2AABB & b2Fixture::GetAABB ( ) const [inline]

Get the fixture's AABB. This AABB may be enlarge and/or stale. If you need a more accurate AABB, compute it using the shape and the body transform.

const b2Body * b2Fixture::GetBody ( ) const [inline]

b2Body * b2Fixture::GetBody ( ) [inline]

Get the parent body of this fixture. This is NULL if the fixture is not attached.

Returns:: the parent body.

float32 b2Fixture::GetDensity ( ) const [inline]

Get the density of this fixture.

const b2Filter & b2Fixture::GetFilterData ( ) const [inline]

Get the contact filtering data.

float32 b2Fixture::GetFriction ( ) const [inline]

Get the coefficient of friction.

void b2Fixture::GetMassData ( b2MassData * massData ) const [inline]

Get the mass data for this fixture. The mass data is based on the density and the shape. The rotational inertia is about the shape's origin. This operation may be expensive.

const b2Fixture * b2Fixture::GetNext ( ) const [inline]

b2Fixture * b2Fixture::GetNext ( ) [inline]

Get the next fixture in the parent body's fixture list.

Returns:: the next shape.

float32 b2Fixture::GetRestitution ( ) const [inline]

Get the coefficient of restitution.

const b2Shape * b2Fixture::GetShape ( ) const [inline]

b2Shape * b2Fixture::GetShape ( ) [inline]

Get the child shape. You can modify the child shape, however you should not change the number of vertices because this will crash some collision caching mechanisms. Manipulating the shape may lead to non-physical behavior.

b2Shape::Type b2Fixture::GetType ( ) const [inline]

Get the type of the child shape. You can use this to down cast to the concrete shape.

Returns:: the shape type.

void * b2Fixture::GetUserData ( ) const [inline]

Get the user data that was assigned in the fixture definition. Use this to store your application specific data.

bool b2Fixture::IsSensor ( ) const [inline]

Is this fixture a sensor (non-solid)?

Returns:: the true if the shape is a sensor.

bool b2Fixture::RayCast	(	b2RayCastOutput *	output,
		const b2RayCastInput &	input
	)			const `[inline]`

Cast a ray against this shape.

Parameters:

	output	the ray-cast results.
	input	the ray-cast input parameters.

void b2Fixture::SetDensity ( float32 density ) [inline]

Set the density of this fixture. This will _not_ automatically adjust the mass of the body. You must call b2Body::ResetMassData to update the body's mass.

void b2Fixture::SetFilterData ( const b2Filter & filter )

Set the contact filtering data. This will not update contacts until the next time step when either parent body is active and awake.

void b2Fixture::SetFriction ( float32 friction ) [inline]

Set the coefficient of friction.

void b2Fixture::SetRestitution ( float32 restitution ) [inline]

Set the coefficient of restitution.

void b2Fixture::SetSensor ( bool sensor )

Set if this fixture is a sensor.

void b2Fixture::SetUserData ( void * data ) [inline]

Set the user data. Use this to store your application specific data.