BodyID Class Reference

ID of a body. This is a way of reasoning about bodies in a multithreaded simulation while avoiding race conditions. More...

#include <BodyID.h>

Public Member Functions
	BodyID ()
	Construct invalid body ID.
	BodyID (uint32 inID)
	Construct from index and sequence number combined in a single uint32 (use with care!)
	BodyID (uint32 inID, uint8 inSequenceNumber)
	Construct from index and sequence number.
uint32	GetIndex () const
	Get index in body array.
uint8	GetSequenceNumber () const
uint32	GetIndexAndSequenceNumber () const
	Returns the index and sequence number combined in an uint32.
bool	IsInvalid () const
	Check if the ID is valid.
bool	operator== (const BodyID &inRHS) const
	Equals check.
bool	operator!= (const BodyID &inRHS) const
	Not equals check.
bool	operator< (const BodyID &inRHS) const
	Smaller than operator, can be used for sorting bodies.
bool	operator> (const BodyID &inRHS) const
	Greater than operator, can be used for sorting bodies.

Static Public Attributes
static JPH_OVERRIDE_NEW_DELETE constexpr uint32	cInvalidBodyID = 0xffffffff
	The value for an invalid body ID.
static constexpr uint32	cBroadPhaseBit = 0x00800000
	This bit is used by the broadphase.
static constexpr uint32	cMaxBodyIndex = 0x7fffff
	Maximum value for body index (also the maximum amount of bodies supported - 1)
static constexpr uint8	cMaxSequenceNumber = 0xff
	Maximum value for the sequence number.

Detailed Description

ID of a body. This is a way of reasoning about bodies in a multithreaded simulation while avoiding race conditions.

Constructor & Destructor Documentation

BodyID() [1/3]

BodyID::BodyID ( )

inline

Construct invalid body ID.

BodyID() [2/3]

BodyID::BodyID ( uint32 inID )

inlineexplicit

Construct from index and sequence number combined in a single uint32 (use with care!)

BodyID() [3/3]

BodyID::BodyID ( uint32 inID, uint8 inSequenceNumber )

inlineexplicit

Construct from index and sequence number.

Member Function Documentation

GetIndex()

uint32 BodyID::GetIndex ( ) const

inline

Get index in body array.

GetIndexAndSequenceNumber()

uint32 BodyID::GetIndexAndSequenceNumber ( ) const

inline

Returns the index and sequence number combined in an uint32.

GetSequenceNumber()

uint8 BodyID::GetSequenceNumber ( ) const

inline

Get sequence number of body. The sequence number can be used to check if a body ID with the same body index has been reused by another body. It is mainly used in multi threaded situations where a body is removed and its body index is immediately reused by a body created from another thread. Functions querying the broadphase can (after acquiring a body lock) detect that the body has been removed (we assume that this won't happen more than 128 times in a row).

IsInvalid()

bool BodyID::IsInvalid ( ) const

inline

Check if the ID is valid.

operator!=()

bool BodyID::operator!= ( const BodyID & inRHS ) const

inline

Not equals check.

operator<()

bool BodyID::operator< ( const BodyID & inRHS ) const

inline

Smaller than operator, can be used for sorting bodies.

operator==()

bool BodyID::operator== ( const BodyID & inRHS ) const

inline

Equals check.

operator>()

bool BodyID::operator> ( const BodyID & inRHS ) const

inline

Greater than operator, can be used for sorting bodies.

Member Data Documentation

cBroadPhaseBit

constexpr uint32 BodyID::cBroadPhaseBit = 0x00800000

staticconstexpr

This bit is used by the broadphase.

cInvalidBodyID

JPH_OVERRIDE_NEW_DELETE constexpr uint32 BodyID::cInvalidBodyID = 0xffffffff

staticconstexpr

The value for an invalid body ID.

cMaxBodyIndex

constexpr uint32 BodyID::cMaxBodyIndex = 0x7fffff

staticconstexpr

Maximum value for body index (also the maximum amount of bodies supported - 1)

cMaxSequenceNumber

constexpr uint8 BodyID::cMaxSequenceNumber = 0xff

staticconstexpr

Maximum value for the sequence number.

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

• Jolt/Physics/Body/BodyID.h