#include <b2BroadPhase.h>

Public Types
enum	{ e_nullProxy = -1 }

Public Member Functions
	b2BroadPhase ()

int32	CreateProxy (const b2AABB &aabb, void *userData)

void	DestroyProxy (int32 proxyId)
	Destroy a proxy. It is up to the client to remove any pairs. More...

const b2AABB &	GetFatAABB (int32 proxyId) const
	Get the fat AABB for a proxy. More...

int32	GetProxyCount () const
	Get the number of proxies. More...

int32	GetTreeBalance () const
	Get the balance of the embedded tree. More...

int32	GetTreeHeight () const
	Get the height of the embedded tree. More...

float32	GetTreeQuality () const
	Get the quality metric of the embedded tree. More...

void *	GetUserData (int32 proxyId) const
	Get user data from a proxy. Returns NULL if the id is invalid. More...

void	MoveProxy (int32 proxyId, const b2AABB &aabb, const b2Vec2 &displacement)

template<typename T >
void	Query (T *callback, const b2AABB &aabb) const

template<typename T >
void	RayCast (T *callback, const b2RayCastInput &input) const

void	ShiftOrigin (const b2Vec2 &newOrigin)

bool	TestOverlap (int32 proxyIdA, int32 proxyIdB) const
	Test overlap of fat AABBs. More...

void	TouchProxy (int32 proxyId)
	Call to trigger a re-processing of it's pairs on the next call to UpdatePairs. More...

template<typename T >
void	UpdatePairs (T *callback)
	Update the pairs. This results in pair callbacks. This can only add pairs. More...

	~b2BroadPhase ()

Private Member Functions
void	BufferMove (int32 proxyId)

bool	QueryCallback (int32 proxyId)

void	UnBufferMove (int32 proxyId)

Private Attributes
int32 *	m_moveBuffer

int32	m_moveCapacity

int32	m_moveCount

b2Pair *	m_pairBuffer

int32	m_pairCapacity

int32	m_pairCount

int32	m_proxyCount

int32	m_queryProxyId

b2DynamicTree	m_tree

Friends
class	b2DynamicTree

Detailed Description

The broad-phase is used for computing pairs and performing volume queries and ray casts. This broad-phase does not persist pairs. Instead, this reports potentially new pairs. It is up to the client to consume the new pairs and to track subsequent overlap.

Definition at line 36 of file b2BroadPhase.h.

Member Enumeration Documentation

anonymous enum

Enumerator
e_nullProxy

Definition at line 40 of file b2BroadPhase.h.

Constructor & Destructor Documentation

b2BroadPhase::b2BroadPhase ( )

Definition at line 21 of file b2BroadPhase.cpp.

b2BroadPhase::~b2BroadPhase ( )

Definition at line 34 of file b2BroadPhase.cpp.

Member Function Documentation

void b2BroadPhase::BufferMove ( int32 proxyId )

private

Definition at line 69 of file b2BroadPhase.cpp.

int32 b2BroadPhase::CreateProxy	(	const b2AABB &	aabb,
		void *	userData
	)

Create a proxy with an initial AABB. Pairs are not reported until UpdatePairs is called.

Definition at line 40 of file b2BroadPhase.cpp.

void b2BroadPhase::DestroyProxy ( int32 proxyId )

Destroy a proxy. It is up to the client to remove any pairs.

Definition at line 48 of file b2BroadPhase.cpp.

const b2AABB & b2BroadPhase::GetFatAABB ( int32 proxyId ) const

inline

Get the fat AABB for a proxy.

Definition at line 159 of file b2BroadPhase.h.

int32 b2BroadPhase::GetProxyCount ( ) const

inline

Get the number of proxies.

Definition at line 164 of file b2BroadPhase.h.

int32 b2BroadPhase::GetTreeBalance ( ) const

inline

Get the balance of the embedded tree.

Definition at line 174 of file b2BroadPhase.h.

int32 b2BroadPhase::GetTreeHeight ( ) const

inline

Get the height of the embedded tree.

Definition at line 169 of file b2BroadPhase.h.

float32 b2BroadPhase::GetTreeQuality ( ) const

inline

Get the quality metric of the embedded tree.

Definition at line 179 of file b2BroadPhase.h.

void * b2BroadPhase::GetUserData ( int32 proxyId ) const

inline

Get user data from a proxy. Returns NULL if the id is invalid.

Definition at line 147 of file b2BroadPhase.h.

void b2BroadPhase::MoveProxy	(	int32	proxyId,
		const b2AABB &	aabb,
		const b2Vec2 &	displacement
	)

Call MoveProxy as many times as you like, then when you are done call UpdatePairs to finalized the proxy pairs (for your time step).

Definition at line 55 of file b2BroadPhase.cpp.

template<typename T >

void b2BroadPhase::Query	(	T *	callback,
		const b2AABB &	aabb
	)		const

inline

Query an AABB for overlapping proxies. The callback class is called for each proxy that overlaps the supplied AABB.

Definition at line 241 of file b2BroadPhase.h.

bool b2BroadPhase::QueryCallback ( int32 proxyId )

private

Definition at line 96 of file b2BroadPhase.cpp.

template<typename T >

void b2BroadPhase::RayCast	(	T *	callback,
		const b2RayCastInput &	input
	)		const

inline

Ray-cast against the proxies in the tree. This relies on the callback to perform a exact ray-cast in the case were the proxy contains a shape. The callback also performs the any collision filtering. This has performance roughly equal to k * log(n), where k is the number of collisions and n is the number of proxies in the tree.

Parameters

input	the ray-cast input data. The ray extends from p1 to p1 + maxFraction * (p2 - p1).
callback	a callback class that is called for each proxy that is hit by the ray.

Definition at line 247 of file b2BroadPhase.h.

void b2BroadPhase::ShiftOrigin ( const b2Vec2 & newOrigin )

inline

Shift the world origin. Useful for large worlds. The shift formula is: position -= newOrigin

Parameters

newOrigin the new origin with respect to the old origin

Definition at line 252 of file b2BroadPhase.h.

bool b2BroadPhase::TestOverlap	(	int32	proxyIdA,
		int32	proxyIdB
	)		const

inline

Test overlap of fat AABBs.

Definition at line 152 of file b2BroadPhase.h.

void b2BroadPhase::TouchProxy ( int32 proxyId )

Call to trigger a re-processing of it's pairs on the next call to UpdatePairs.

Definition at line 64 of file b2BroadPhase.cpp.

void b2BroadPhase::UnBufferMove ( int32 proxyId )

private

Definition at line 84 of file b2BroadPhase.cpp.

template<typename T >

void b2BroadPhase::UpdatePairs ( T * callback )

Update the pairs. This results in pair callbacks. This can only add pairs.

Definition at line 185 of file b2BroadPhase.h.

Friends And Related Function Documentation

friend class b2DynamicTree

friend

Definition at line 109 of file b2BroadPhase.h.

Member Data Documentation

int32* b2BroadPhase::m_moveBuffer

private

Definition at line 120 of file b2BroadPhase.h.

int32 b2BroadPhase::m_moveCapacity

private

Definition at line 121 of file b2BroadPhase.h.

int32 b2BroadPhase::m_moveCount

private

Definition at line 122 of file b2BroadPhase.h.

b2Pair* b2BroadPhase::m_pairBuffer

private

Definition at line 124 of file b2BroadPhase.h.

int32 b2BroadPhase::m_pairCapacity

private

Definition at line 125 of file b2BroadPhase.h.

int32 b2BroadPhase::m_pairCount

private

Definition at line 126 of file b2BroadPhase.h.

int32 b2BroadPhase::m_proxyCount

private

Definition at line 118 of file b2BroadPhase.h.

int32 b2BroadPhase::m_queryProxyId

private

Definition at line 128 of file b2BroadPhase.h.

b2DynamicTree b2BroadPhase::m_tree

private

Definition at line 116 of file b2BroadPhase.h.

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Friends

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation