BroadPhase Class Reference

Used to do coarse collision detection operations to quickly prune out bodies that will not collide. More...

#include <BroadPhase.h>

Inheritance diagram for BroadPhase:

Classes
struct	UpdateState
	Context used during broadphase update. More...

Public Types
using	AddState = void *
	Handle used during adding bodies to the broadphase.

Public Member Functions
virtual void	Init (BodyManager *inBodyManager, const BroadPhaseLayerInterface &inLayerInterface)
virtual void	Optimize ()
	Should be called after many objects have been inserted to make the broadphase more efficient, usually done on startup only.
virtual void	FrameSync ()
	Must be called just before updating the broadphase when none of the body mutexes are locked.
virtual void	LockModifications ()
	Must be called before UpdatePrepare to prevent modifications from being made to the tree.
virtual UpdateState	UpdatePrepare ()
virtual void	UpdateFinalize (const UpdateState &inUpdateState)
	Finalizing the update will quickly apply the changes.
virtual void	UnlockModifications ()
	Must be called after UpdateFinalize to allow modifications to the broadphase.
virtual AddState	AddBodiesPrepare (BodyID *ioBodies, int inNumber)
virtual void	AddBodiesFinalize (BodyID *ioBodies, int inNumber, AddState inAddState)=0
virtual void	AddBodiesAbort (BodyID *ioBodies, int inNumber, AddState inAddState)
virtual void	RemoveBodies (BodyID *ioBodies, int inNumber)=0
virtual void	NotifyBodiesAABBChanged (BodyID *ioBodies, int inNumber, bool inTakeLock=true)=0
virtual void	NotifyBodiesLayerChanged (BodyID *ioBodies, int inNumber)=0
	Call whenever the layer (and optionally the aabb as well) of a body changes (can change order of ioBodies array)
virtual void	FindCollidingPairs (BodyID *ioActiveBodies, int inNumActiveBodies, float inSpeculativeContactDistance, const ObjectVsBroadPhaseLayerFilter &inObjectVsBroadPhaseLayerFilter, const ObjectLayerPairFilter &inObjectLayerPairFilter, BodyPairCollector &ioPairCollector) const =0
virtual void	CastAABoxNoLock (const AABoxCast &inBox, CastShapeBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter, const ObjectLayerFilter &inObjectLayerFilter) const =0
	Same as BroadPhaseQuery::CastAABox but can be implemented in a way to take no broad phase locks.
virtual AABox	GetBounds () const =0
	Get the bounding box of all objects in the broadphase.
Public Member Functions inherited from BroadPhaseQuery
virtual	~BroadPhaseQuery ()=default
	Virtual destructor.
virtual void	CastRay (const RayCast &inRay, RayCastBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter={ }, const ObjectLayerFilter &inObjectLayerFilter={ }) const =0
	Cast a ray and add any hits to ioCollector.
virtual void	CollideAABox (const AABox &inBox, CollideShapeBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter={ }, const ObjectLayerFilter &inObjectLayerFilter={ }) const =0
	Get bodies intersecting with inBox and any hits to ioCollector.
virtual void	CollideSphere (Vec3Arg inCenter, float inRadius, CollideShapeBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter={ }, const ObjectLayerFilter &inObjectLayerFilter={ }) const =0
	Get bodies intersecting with a sphere and any hits to ioCollector.
virtual void	CollidePoint (Vec3Arg inPoint, CollideShapeBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter={ }, const ObjectLayerFilter &inObjectLayerFilter={ }) const =0
	Get bodies intersecting with a point and any hits to ioCollector.
virtual void	CollideOrientedBox (const OrientedBox &inBox, CollideShapeBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter={ }, const ObjectLayerFilter &inObjectLayerFilter={ }) const =0
	Get bodies intersecting with an oriented box and any hits to ioCollector.
virtual void	CastAABox (const AABoxCast &inBox, CastShapeBodyCollector &ioCollector, const BroadPhaseLayerFilter &inBroadPhaseLayerFilter={ }, const ObjectLayerFilter &inObjectLayerFilter={ }) const =0
	Cast a box and add any hits to ioCollector.
Public Member Functions inherited from NonCopyable
	NonCopyable ()=default
	NonCopyable (const NonCopyable &)=delete
void	operator= (const NonCopyable &)=delete

Protected Attributes
BodyManager *	mBodyManager = nullptr
	Link to the body manager that manages the bodies in this broadphase.

Detailed Description

Used to do coarse collision detection operations to quickly prune out bodies that will not collide.

Member Typedef Documentation

AddState

using BroadPhase::AddState = void *

Handle used during adding bodies to the broadphase.

Member Function Documentation

AddBodiesAbort()

virtual void BroadPhase::AddBodiesAbort ( BodyID * ioBodies, int inNumber, AddState inAddState )

inlinevirtual

Abort adding bodies to the broadphase, supply the return value of AddBodiesPrepare in inAddState. This can be done on a background thread without influencing the broadphase. Please ensure that the ioBodies array passed to AddBodiesPrepare is unmodified and passed again to this function.

Reimplemented in BroadPhaseQuadTree.

AddBodiesFinalize()

virtual void BroadPhase::AddBodiesFinalize ( BodyID * ioBodies, int inNumber, AddState inAddState )

pure virtual

Finalize adding bodies to the broadphase, supply the return value of AddBodiesPrepare in inAddState. Please ensure that the ioBodies array passed to AddBodiesPrepare is unmodified and passed again to this function.

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

AddBodiesPrepare()

virtual AddState BroadPhase::AddBodiesPrepare ( BodyID * ioBodies, int inNumber )

inlinevirtual

Prepare adding inNumber bodies at ioBodies to the broadphase, returns a handle that should be used in AddBodiesFinalize/Abort. This can be done on a background thread without influencing the broadphase. ioBodies may be shuffled around by this function and should be kept that way until AddBodiesFinalize/Abort is called.

Reimplemented in BroadPhaseQuadTree.

CastAABoxNoLock()

virtual void BroadPhase::CastAABoxNoLock ( const AABoxCast & inBox, CastShapeBodyCollector & ioCollector, const BroadPhaseLayerFilter & inBroadPhaseLayerFilter, const ObjectLayerFilter & inObjectLayerFilter ) const

pure virtual

Same as BroadPhaseQuery::CastAABox but can be implemented in a way to take no broad phase locks.

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

FindCollidingPairs()

virtual void BroadPhase::FindCollidingPairs ( BodyID * ioActiveBodies, int inNumActiveBodies, float inSpeculativeContactDistance, const ObjectVsBroadPhaseLayerFilter & inObjectVsBroadPhaseLayerFilter, const ObjectLayerPairFilter & inObjectLayerPairFilter, BodyPairCollector & ioPairCollector ) const

pure virtual

Find all colliding pairs between dynamic bodies Note that this function is very specifically tailored for the PhysicsSystem::Update function, hence it is not part of the BroadPhaseQuery interface. One of the assumptions it can make is that no locking is needed during the query as it will only be called during a very particular part of the update.

Parameters

ioActiveBodies	is a list of bodies for which we need to find colliding pairs (this function can change the order of the ioActiveBodies array). This can be a subset of the set of active bodies in the system.
inNumActiveBodies	is the size of the ioActiveBodies array.
inSpeculativeContactDistance	Distance at which speculative contact points will be created.
inObjectVsBroadPhaseLayerFilter	is the filter that determines if an object can collide with a broadphase layer.
inObjectLayerPairFilter	is the filter that determines if two objects can collide.
ioPairCollector	receives callbacks for every body pair found.

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

FrameSync()

virtual void BroadPhase::FrameSync ( )

inlinevirtual

Must be called just before updating the broadphase when none of the body mutexes are locked.

Reimplemented in BroadPhaseQuadTree.

GetBounds()

virtual AABox BroadPhase::GetBounds ( ) const

pure virtual

Get the bounding box of all objects in the broadphase.

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

Init()

JPH_NAMESPACE_BEGIN void BroadPhase::Init ( BodyManager * inBodyManager, const BroadPhaseLayerInterface & inLayerInterface )

virtual

Initialize the broadphase.

Parameters

inBodyManager	The body manager singleton
inLayerInterface	Interface that maps object layers to broadphase layers. Note that the broadphase takes a pointer to the data inside inObjectToBroadPhaseLayer so this object should remain static.

Reimplemented in BroadPhaseQuadTree.

LockModifications()

virtual void BroadPhase::LockModifications ( )

inlinevirtual

Must be called before UpdatePrepare to prevent modifications from being made to the tree.

Reimplemented in BroadPhaseQuadTree.

NotifyBodiesAABBChanged()

virtual void BroadPhase::NotifyBodiesAABBChanged ( BodyID * ioBodies, int inNumber, bool inTakeLock = true )

pure virtual

Call whenever the aabb of a body changes (can change order of ioBodies array) inTakeLock should be false if we're between LockModifications/UnlockModificiations in which case care needs to be taken to not call this between UpdatePrepare/UpdateFinalize

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

NotifyBodiesLayerChanged()

virtual void BroadPhase::NotifyBodiesLayerChanged ( BodyID * ioBodies, int inNumber )

pure virtual

Call whenever the layer (and optionally the aabb as well) of a body changes (can change order of ioBodies array)

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

Optimize()

virtual void BroadPhase::Optimize ( )

inlinevirtual

Should be called after many objects have been inserted to make the broadphase more efficient, usually done on startup only.

Reimplemented in BroadPhaseQuadTree.

RemoveBodies()

virtual void BroadPhase::RemoveBodies ( BodyID * ioBodies, int inNumber )

pure virtual

Remove inNumber bodies in ioBodies from the broadphase. ioBodies may be shuffled around by this function.

Implemented in BroadPhaseBruteForce, and BroadPhaseQuadTree.

UnlockModifications()

virtual void BroadPhase::UnlockModifications ( )

inlinevirtual

Must be called after UpdateFinalize to allow modifications to the broadphase.

Reimplemented in BroadPhaseQuadTree.

UpdateFinalize()

virtual void BroadPhase::UpdateFinalize ( const UpdateState & inUpdateState )

inlinevirtual

Finalizing the update will quickly apply the changes.

Reimplemented in BroadPhaseQuadTree.

UpdatePrepare()

virtual UpdateState BroadPhase::UpdatePrepare ( )

inlinevirtual

Update the broadphase, needs to be called frequently to update the internal state when bodies have been modified. The UpdatePrepare() function can run in a background thread without influencing the broadphase

Reimplemented in BroadPhaseQuadTree.

Member Data Documentation

mBodyManager

BodyManager* BroadPhase::mBodyManager = nullptr

protected

Link to the body manager that manages the bodies in this broadphase.

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

• Jolt/Physics/Collision/BroadPhase/BroadPhase.h
• Jolt/Physics/Collision/BroadPhase/BroadPhase.cpp