IslandBuilder Class Reference

Keeps track of connected bodies and builds islands for multithreaded velocity/position update. More...

#include <IslandBuilder.h>

Inheritance diagram for IslandBuilder:

Public Member Functions
	~IslandBuilder ()
	Destructor.
void	Init (uint32 inMaxActiveBodies)
	Initialize the island builder with the maximum amount of bodies that could be active.
void	PrepareContactConstraints (uint32 inMaxContactConstraints, TempAllocator *inTempAllocator)
	Prepare for simulation step by allocating space for the contact constraints.
void	PrepareNonContactConstraints (uint32 inNumConstraints, TempAllocator *inTempAllocator)
	Prepare for simulation step by allocating space for the non-contact constraints.
void	LinkBodies (uint32 inFirst, uint32 inSecond)
	Link two bodies by their index in the BodyManager::mActiveBodies list to form islands.
void	LinkConstraint (uint32 inConstraintIndex, uint32 inFirst, uint32 inSecond)
	Link a constraint to a body by their index in the BodyManager::mActiveBodies.
void	LinkContact (uint32 inContactIndex, uint32 inFirst, uint32 inSecond)
	Link a contact to a body by their index in the BodyManager::mActiveBodies.
void	Finalize (const BodyID *inActiveBodies, uint32 inNumActiveBodies, uint32 inNumContacts, TempAllocator *inTempAllocator)
	Finalize the islands after all bodies have been Link()-ed.
uint32	GetNumIslands () const
	Get the amount of islands formed.
void	GetBodiesInIsland (uint32 inIslandIndex, BodyID *&outBodiesBegin, BodyID *&outBodiesEnd) const
	Get iterator for a particular island, return false if there are no constraints.
bool	GetConstraintsInIsland (uint32 inIslandIndex, uint32 *&outConstraintsBegin, uint32 *&outConstraintsEnd) const
bool	GetContactsInIsland (uint32 inIslandIndex, uint32 *&outContactsBegin, uint32 *&outContactsEnd) const
void	SetNumPositionSteps (uint32 inIslandIndex, uint inNumPositionSteps)
	The number of position iterations for each island.
uint	GetNumPositionSteps (uint32 inIslandIndex) const
void	ResetIslands (TempAllocator *inTempAllocator)
	After you're done calling the three functions above, call this function to free associated data.
Public Member Functions inherited from NonCopyable
	NonCopyable ()=default
	NonCopyable (const NonCopyable &)=delete
void	operator= (const NonCopyable &)=delete

Detailed Description

Keeps track of connected bodies and builds islands for multithreaded velocity/position update.

Constructor & Destructor Documentation

~IslandBuilder()

JPH_NAMESPACE_BEGIN IslandBuilder::~IslandBuilder

(

)

Destructor.

Member Function Documentation

Finalize()

void IslandBuilder::Finalize	(	const BodyID *	inActiveBodies,
		uint32	inNumActiveBodies,
		uint32	inNumContacts,
		TempAllocator *	inTempAllocator )

Finalize the islands after all bodies have been Link()-ed.

GetBodiesInIsland()

void IslandBuilder::GetBodiesInIsland	(	uint32	inIslandIndex,
		BodyID *&	outBodiesBegin,
		BodyID *&	outBodiesEnd ) const

Get iterator for a particular island, return false if there are no constraints.

GetConstraintsInIsland()

bool IslandBuilder::GetConstraintsInIsland	(	uint32	inIslandIndex,
		uint32 *&	outConstraintsBegin,
		uint32 *&	outConstraintsEnd ) const

GetContactsInIsland()

bool IslandBuilder::GetContactsInIsland	(	uint32	inIslandIndex,
		uint32 *&	outContactsBegin,
		uint32 *&	outContactsEnd ) const

GetNumIslands()

uint32 IslandBuilder::GetNumIslands ( ) const

inline

Get the amount of islands formed.

GetNumPositionSteps()

uint IslandBuilder::GetNumPositionSteps ( uint32 inIslandIndex ) const

inline

Init()

void IslandBuilder::Init

(

uint32

inMaxActiveBodies

)

Initialize the island builder with the maximum amount of bodies that could be active.

LinkBodies()

void IslandBuilder::LinkBodies	(	uint32	inFirst,
		uint32	inSecond )

Link two bodies by their index in the BodyManager::mActiveBodies list to form islands.

LinkConstraint()

void IslandBuilder::LinkConstraint	(	uint32	inConstraintIndex,
		uint32	inFirst,
		uint32	inSecond )

Link a constraint to a body by their index in the BodyManager::mActiveBodies.

LinkContact()

void IslandBuilder::LinkContact	(	uint32	inContactIndex,
		uint32	inFirst,
		uint32	inSecond )

Link a contact to a body by their index in the BodyManager::mActiveBodies.

PrepareContactConstraints()

void IslandBuilder::PrepareContactConstraints	(	uint32	inMaxContactConstraints,
		TempAllocator *	inTempAllocator )

Prepare for simulation step by allocating space for the contact constraints.

PrepareNonContactConstraints()

void IslandBuilder::PrepareNonContactConstraints	(	uint32	inNumConstraints,
		TempAllocator *	inTempAllocator )

Prepare for simulation step by allocating space for the non-contact constraints.

ResetIslands()

void IslandBuilder::ResetIslands

(

TempAllocator *

inTempAllocator

)

After you're done calling the three functions above, call this function to free associated data.

SetNumPositionSteps()

void IslandBuilder::SetNumPositionSteps ( uint32 inIslandIndex, uint inNumPositionSteps )

inline

The number of position iterations for each island.

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

• Jolt/Physics/IslandBuilder.h
• Jolt/Physics/IslandBuilder.cpp