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// Copyright (c) 2008-2025 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  

#ifndef SC_SCENE_H
#define SC_SCENE_H

#include "PxPhysXConfig.h"
#include "PxScene.h"
#include "PxSimulationEventCallback.h"
#include "foundation/PxPool.h"
#include "foundation/PxHashSet.h"
#include "foundation/PxHashMap.h"
#include "CmTask.h"
#include "CmFlushPool.h"
#include "CmPreallocatingPool.h"
#include "foundation/PxBitMap.h"
#include "ScIterators.h"
#include "PxsMaterialManager.h"
#include "PxvManager.h"
#include "ScStaticCore.h"
#include "ScBodyCore.h"
#include "PxAggregate.h"
#include "PxsContext.h"
#include "GuPrunerTypedef.h"
#include "DyContext.h"
#include "ScFiltering.h"
#include "ScBroadphase.h"
#include "ScInteraction.h"
#include "ScArticulationJointSim.h"
#include "ScConstraintInteraction.h"
#include "ScConstraintSim.h"

#define PX_MAX_DOMINANCE_GROUP 32

namespace
{
class OverlapFilterTask;
class OnOverlapCreatedTask;
class IslandInsertionTask;
}

namespace physx
{
	class NpShape;

struct PxTriggerPair;

class PxsSimulationController;
class PxsSimulationControllerCallback;
class PxsMemoryManager;

struct PxConeLimitedConstraint;

#if PX_SUPPORT_GPU_PHYSX
class PxsKernelWranglerManager;
class PxsHeapMemoryAllocatorManager;
#endif

namespace IG
{
	class SimpleIslandManager;
	typedef PxU32 EdgeIndex;
}

struct DelayedGPUTypes
{
	struct Data
	{
		IG::EdgeIndex		mEdgeIndex;
		IG::Edge::EdgeType	mType;
	};
	PxArray<Data>	mDelayed;
	PxMutex			mLock;
};

class PxsCCDContext;

namespace Cm
{
	class IDPool;
}

namespace Bp
{
	class AABBManagerBase;
	class BroadPhase;
	class BoundsArray;
}

namespace Dy
{
	class FeatherstoneArticulation;
	class Context;
#if PX_SUPPORT_GPU_PHYSX
	class DeformableSurface;
	class DeformableVolume;
	class ParticleSystem;
#endif
}

namespace Sc
{
	class ActorSim;
	class ElementSim;

	class ShapeCore;
	class RigidCore;
	class ConstraintCore;
	class ArticulationCore;
	class ArticulationJointCore;
	class ArticulationSpatialTendonCore;
	class ArticulationFixedTendonCore;
	class ArticulationMimicJointCore;
	class LLArticulationPool;
	class LLArticulationRCPool;
	class LLDeformableSurfacePool;
	class LLDeformableVolumePool;
	class LLParticleSystemPool;

	class BodyCore;
	class DeformableSurfaceCore;
	class DeformableVolumeCore;
	class ParticleSystemCore;

	class NPhaseCore;
	class ElementSimInteraction;
	class BodySim;
	class ShapeSim;
	class RigidSim;
	class StaticSim;
	class ConstraintSim;
	struct TriggerPairExtraData;
	class ObjectIDTracker;
	class ActorPairReport;
	class ContactStreamManager;
	class SqBoundsManager;
	class ShapeInteraction;
	class ElementInteractionMarker;
	class ArticulationSim;
	class DeformableSurfaceSim;
	class DeformableVolumeSim;
	class ParticleSystemSim;
	class SimStats;
	struct SimStateData;

	struct BatchInsertionState
	{
		BodySim*  bodySim;
		StaticSim*staticSim; 
		ShapeSim* shapeSim;
		ptrdiff_t staticActorOffset;
		ptrdiff_t staticShapeTableOffset;
		ptrdiff_t dynamicActorOffset;
		ptrdiff_t dynamicShapeTableOffset;
		ptrdiff_t shapeOffset;
	};

	struct BatchRemoveState
	{
		PxInlineArray<ShapeSim*, 64>			bufferedShapes;
		PxInlineArray<const ShapeCore*, 64>		removedShapes;
	};

	struct SceneInternalFlag
	{
		enum Enum
		{
			eSCENE_SIP_STATES_DIRTY_DOMINANCE		= (1<<1),
			eSCENE_SIP_STATES_DIRTY_VISUALIZATION	= (1<<2),
			eSCENE_DEFAULT							= 0
		};
	};

	struct SimulationStage
	{
		enum Enum
		{
			eCOMPLETE,
			eCOLLIDE,
			eFETCHCOLLIDE,
			eADVANCE,
			eFETCHRESULT
		};
	};

	struct SqBoundsSync;
	struct SqRefFinder;

	struct ParticleOrSoftBodyRigidInteraction
	{
		IG::EdgeIndex mIndex;
		PxU32 mCount;

		ParticleOrSoftBodyRigidInteraction() : mCount(0) {}
	};

	class Scene : public PxUserAllocated
	{
		struct SimpleBodyPair
		{
			ActorSim* body1;
			ActorSim* body2;
			PxU32 body1ID;
			PxU32 body2ID;
		};

		PX_NOCOPY(Scene)

	public:
												Scene(const PxSceneDesc& desc, PxU64 contextID);
												~Scene() {}	//use release() plz.

					void						preAllocate(PxU32 nbStatics, PxU32 nbBodies, PxU32 nbStaticShapes, PxU32 nbDynamicShapes);
					void						release();

	PX_FORCE_INLINE	PxsSimulationController*	getSimulationController()						{ return mSimulationController;	}
	PX_FORCE_INLINE	const PxsSimulationController*	getSimulationController()			const	{ return mSimulationController;	}

	PX_FORCE_INLINE	Bp::AABBManagerBase*		getAABBManager()								{ return mAABBManager;	}
	PX_FORCE_INLINE const Bp::AABBManagerBase*	getAABBManager()						const	{ return mAABBManager;	}
	PX_FORCE_INLINE PxArray<BodySim*>&			getCcdBodies()									{ return mCcdBodies;	}

	PX_FORCE_INLINE	IG::SimpleIslandManager*	getSimpleIslandManager()						{ return mSimpleIslandManager; }
	PX_FORCE_INLINE	const IG::SimpleIslandManager*	getSimpleIslandManager()			const	{ return mSimpleIslandManager; }

	PX_FORCE_INLINE SimulationStage::Enum		getSimulationStage()					const	{ return mSimulationStage; }
	PX_FORCE_INLINE void						setSimulationStage(SimulationStage::Enum stage)	{ mSimulationStage = stage; }

	PX_FORCE_INLINE	PxPool<SimStateData>*		getSimStateDataPool()							{ return mSimStateDataPool; }
	PX_FORCE_INLINE PxBitMap&					getDirtyShapeSimMap()							{ return mDirtyShapeSimMap; }

	PX_FORCE_INLINE	void						setGravity(const PxVec3& g)						{ mGravity = g;		}
	PX_FORCE_INLINE	const PxVec3&				getGravity()							const	{ return mGravity;	}

	PX_FORCE_INLINE void						setElapsedTime(PxReal t)						{ mDt = t; mOneOverDt = t > 0.0f ? 1.0f/t : 0.0f;	}
	PX_FORCE_INLINE	PxReal						getOneOverDt()							const	{ return mOneOverDt;								}
//	PX_FORCE_INLINE	PxReal						getDt()									const	{ return mDt;										}

	PX_FORCE_INLINE	void						setLimits(const PxSceneLimits& limits)			{ mLimits = limits;	}
	PX_FORCE_INLINE	const PxSceneLimits&		getLimits()								const	{ return mLimits;	}

	PX_FORCE_INLINE	void						setBatchRemove(BatchRemoveState* bs)			{ mBatchRemoveState = bs;	}
	PX_FORCE_INLINE	BatchRemoveState*			getBatchRemove()						const	{ return mBatchRemoveState;	}

	PX_FORCE_INLINE	void						setMaxArticulationLinks(const PxU32 maxLinks)	{ mMaxNbArticulationLinks = maxLinks;	}
	PX_FORCE_INLINE	PxU32						getMaxArticulationLinks()				const	{ return mMaxNbArticulationLinks;		}

	// mDynamicsContext wrappers
	PX_FORCE_INLINE	Dy::Context*				getDynamicsContext()							{ return mDynamicsContext; }
	PX_FORCE_INLINE const Dy::Context*			getDynamicsContext()					const	{ return mDynamicsContext; }

	PX_FORCE_INLINE	void						setBounceThresholdVelocity(PxReal t)			{ mDynamicsContext->setBounceThreshold(-t);			}
	PX_FORCE_INLINE	PxReal						getBounceThresholdVelocity()			const	{ return -mDynamicsContext->getBounceThreshold();	}

	PX_FORCE_INLINE	PxSolverType::Enum 			getSolverType()							const	{ return mDynamicsContext->getSolverType();		}

	PX_FORCE_INLINE	void						setSolverBatchSize(PxU32 solverBatchSize)		{ mDynamicsContext->setSolverBatchSize(solverBatchSize);	}
	PX_FORCE_INLINE	PxU32						getSolverBatchSize()					const	{ return mDynamicsContext->getSolverBatchSize();			}

	PX_FORCE_INLINE	void						setSolverArticBatchSize(PxU32 solverBatchSize)	{ mDynamicsContext->setSolverArticBatchSize(solverBatchSize);	}
	PX_FORCE_INLINE	PxU32						getSolverArticBatchSize()				const	{ return mDynamicsContext->getSolverArticBatchSize();			}

	PX_FORCE_INLINE	void						setCCDMaxSeparation(PxReal separation)			{ mDynamicsContext->setCCDSeparationThreshold(separation);		}
	PX_FORCE_INLINE	PxReal						getCCDMaxSeparation()					const	{ return mDynamicsContext->getCCDSeparationThreshold();			}

	PX_FORCE_INLINE	void						setMaxBiasCoefficient(PxReal coeff)				{ mDynamicsContext->setMaxBiasCoefficient(coeff);				}
	PX_FORCE_INLINE	PxReal						getMaxBiasCoefficient()					const	{ return mDynamicsContext->getMaxBiasCoefficient();				}

	PX_FORCE_INLINE	void						setFrictionOffsetThreshold(PxReal t)			{ mDynamicsContext->setFrictionOffsetThreshold(t);				}
	PX_FORCE_INLINE	PxReal						getFrictionOffsetThreshold()			const	{ return mDynamicsContext->getFrictionOffsetThreshold();		}

	PX_FORCE_INLINE	void						setFrictionCorrelationDistance(PxReal t)		{ mDynamicsContext->setCorrelationDistance(t);					}
	PX_FORCE_INLINE	PxReal						getFrictionCorrelationDistance()		const	{ return mDynamicsContext->getCorrelationDistance();			}

	PX_FORCE_INLINE	PxReal						getLengthScale()						const	{ return mDynamicsContext->getLengthScale();	}

	PX_FORCE_INLINE	void						setDynamicsDirty()								{ mDynamicsContext->setStateDirty(true);		}
	//~mDynamicsContext wrappers

	// mLLContext wrappers
	PX_FORCE_INLINE	PxsContext*					getLowLevelContext()							{ return mLLContext; }
	PX_FORCE_INLINE const PxsContext*			getLowLevelContext()					const	{ return mLLContext; }

	PX_FORCE_INLINE Cm::FlushPool*				getFlushPool()									{ return &mLLContext->getTaskPool();	}

	PX_FORCE_INLINE	void						setPCM(bool enabled)							{ mLLContext->setPCM(enabled);			}
	PX_FORCE_INLINE	void						setContactCache(bool enabled)					{ mLLContext->setContactCache(enabled);	}

	PX_FORCE_INLINE	void						setContactModifyCallback(PxContactModifyCallback* callback)	{ mLLContext->setContactModifyCallback(callback);	}
	PX_FORCE_INLINE	PxContactModifyCallback*	getContactModifyCallback()							const	{ return mLLContext->getContactModifyCallback();	}

	PX_FORCE_INLINE	void						setDeformableSurfaceGpuPostSolveCallback(PxPostSolveCallback* callback) { mSimulationController->setDeformableSurfaceGpuPostSolveCallback(callback); }
	PX_FORCE_INLINE	void						setDeformableVolumeGpuPostSolveCallback(PxPostSolveCallback* callback) { mSimulationController->setDeformableVolumeGpuPostSolveCallback(callback); }

	PX_FORCE_INLINE	void						setVisualizationParameter(PxVisualizationParameter::Enum param, PxReal value)
												{
													mVisualizationParameterChanged = true;
													mLLContext->setVisualizationParameter(param, value);
												}

	PX_FORCE_INLINE	PxReal						getVisualizationParameter(PxVisualizationParameter::Enum param) const	{ return mLLContext->getVisualizationParameter(param);	}
	PX_FORCE_INLINE	void						setVisualizationCullingBox(const PxBounds3& box)						{ mLLContext->setVisualizationCullingBox(box);			}
	PX_FORCE_INLINE	const PxBounds3&			getVisualizationCullingBox()									const	{ return mLLContext->getVisualizationCullingBox();		}
	PX_FORCE_INLINE	PxReal						getVisualizationScale()											const	{ return mLLContext->getRenderScale();					}
	PX_FORCE_INLINE	PxRenderBuffer&				getRenderBuffer()														{ return mLLContext->getRenderBuffer();	}

	PX_FORCE_INLINE	void						setNbContactDataBlocks(PxU32 blockCount)								{ mLLContext->getNpMemBlockPool().setBlockCount(blockCount);			}
	PX_FORCE_INLINE	PxU32						getNbContactDataBlocksUsed()									const	{ return mLLContext->getNpMemBlockPool().getUsedBlockCount();			}
	PX_FORCE_INLINE	PxU32						getMaxNbContactDataBlocksUsed()									const	{ return mLLContext->getNpMemBlockPool().getMaxUsedBlockCount();		}
	PX_FORCE_INLINE	PxU32						getMaxNbConstraintDataBlocksUsed()								const	{ return mLLContext->getNpMemBlockPool().getPeakConstraintBlockCount();	}
	PX_FORCE_INLINE	void						setScratchBlock(void* addr, PxU32 size)									{ mLLContext->setScratchBlock(addr, size);								}
	//~mLLContext wrappers

	PX_FORCE_INLINE	void						setFlags(PxSceneFlags flags)
												{
													mPublicFlags = flags;
												}
	PX_FORCE_INLINE	PxSceneFlags				getFlags()										const	{ return mPublicFlags;	}
	PX_FORCE_INLINE	bool						readInternalFlag(SceneInternalFlag::Enum flag)	const	{ return (mInternalFlags & flag) != 0;	}

					void						addStatic(StaticCore&, NpShape*const *shapes, PxU32 nbShapes, size_t shapePtrOffset, PxBounds3* uninflatedBounds);
					void						removeStatic(StaticCore&, PxInlineArray<const ShapeCore*,64>& removedShapes, bool wakeOnLostTouch);

					void						addBody(BodyCore&, NpShape*const *shapes, PxU32 nbShapes, size_t shapePtrOffset, PxBounds3* uninflatedBounds, bool compound);
					void						removeBody(BodyCore&, PxInlineArray<const ShapeCore*,64>& removedShapes, bool wakeOnLostTouch);

					// Batch insertion API.
					// the bounds generated here are the uninflated bounds for the shapes, *if* they are trigger or sim shapes. 
					// It's up to the caller to ensure the bounds array is big enough.
					// Some care is required in handling these since sim and SQ tweak the bounds in slightly different ways.

					void						startBatchInsertion(BatchInsertionState&);
					void						addStatic(PxActor* actor, BatchInsertionState&, PxBounds3* outBounds);
					void						addBody(PxActor* actor, BatchInsertionState&, PxBounds3* outBounds, bool compound);
					void						finishBatchInsertion(BatchInsertionState&);

					void						addConstraint(ConstraintCore&, RigidCore*, RigidCore*);
					void						removeConstraint(ConstraintCore&);

					void						addConstraintToMap(ConstraintCore& constraint, RigidCore*, RigidCore*);
					void						removeConstraintFromMap(const ConstraintInteraction&);

					void						addArticulation(ArticulationCore&, BodyCore& root);
					void						removeArticulation(ArticulationCore&);

					void						addArticulationJoint(ArticulationJointCore&, BodyCore& parent, BodyCore& child);
					void						removeArticulationJoint(ArticulationJointCore&);

					void						addArticulationTendon(ArticulationSpatialTendonCore&);
	static			void						removeArticulationTendon(ArticulationSpatialTendonCore&);

					void						addArticulationTendon(ArticulationFixedTendonCore&);
	static			void						removeArticulationTendon(ArticulationFixedTendonCore&);

					void						addArticulationMimicJoint(ArticulationMimicJointCore&);
	static			void						removeArticulationMimicJoint(ArticulationMimicJointCore&);

					void						addArticulationSimControl(ArticulationCore& core);
					void						removeArticulationSimControl(ArticulationCore& core);

					void						updateBodySim(BodySim& sim);

	PX_FORCE_INLINE	PxU32						getNbArticulations() const	{ return mArticulations.size();			}
	PX_FORCE_INLINE	ArticulationCore* const*	getArticulations()			{ return mArticulations.getEntries();	}
	
	PX_FORCE_INLINE	PxU32						getNbConstraints()	const	{ return mConstraints.size();		}
	PX_FORCE_INLINE	ConstraintCore*const*		getConstraints()	const	{ return mConstraints.getEntries();	}
	PX_FORCE_INLINE	ConstraintCore*const*		getConstraints()			{ return mConstraints.getEntries();	}

					void						initContactsIterator(ContactIterator&, PxsContactManagerOutputIterator&);

					void						setSimulationEventCallback(PxSimulationEventCallback* callback);
					PxSimulationEventCallback*	getSimulationEventCallback() const;

					void						setCCDContactModifyCallback(PxCCDContactModifyCallback* callback);
					PxCCDContactModifyCallback*	getCCDContactModifyCallback() const;

					void						setCCDMaxPasses(PxU32 ccdMaxPasses);
					PxU32						getCCDMaxPasses() const;

					void						setCCDThreshold(PxReal t);
					PxReal						getCCDThreshold() const;

		// Broad-phase management
					void						finishBroadPhase(PxBaseTask* continuation);
					void						finishBroadPhaseStage2(PxU32 ccdPass);
					void						preallocateContactManagers(PxBaseTask* continuation);

					void						islandInsertion(PxBaseTask* continuation);
					void						registerContactManagers(PxBaseTask* continuation);
					void						registerInteractions(PxBaseTask* continuation);
					void						registerSceneInteractions(PxBaseTask* continuation);

					void						secondPassNarrowPhase(PxBaseTask* continuation);

					void						setDominanceGroupPair(PxDominanceGroup group1, PxDominanceGroup group2, const PxDominanceGroupPair& dominance);
					PxDominanceGroupPair		getDominanceGroupPair(PxDominanceGroup group1, PxDominanceGroup group2) const;

		// Run
					void						simulate(PxReal timeStep, PxBaseTask* continuation);
					void						advance(PxReal timeStep, PxBaseTask* continuation);
					void						collide(PxReal timeStep, PxBaseTask* continuation);
					void						endSimulation();
					void						flush(bool sendPendingReports);
					void						fireBrokenConstraintCallbacks();
					void						fireTriggerCallbacks();
					void						fireQueuedContactCallbacks();
					void						fireOnAdvanceCallback();

					const PxArray<PxContactPairHeader>&
												getQueuedContactPairHeaders();

					void						postCallbacksPreSync();
					void						postCallbacksPreSyncKinematics();
					void						postReportsCleanup();
					void						fireCallbacksPostSync();
					void						syncSceneQueryBounds(SqBoundsSync& sync, SqRefFinder& finder);					

					PxU32						getDefaultContactReportStreamBufferSize() const;

					void						visualizeStartStep();
					void						visualizeContacts();

// PX_ENABLE_SIM_STATS
					void						getStats(PxSimulationStatistics& stats) const;
	PX_FORCE_INLINE	SimStats&					getStatsInternal() { return *mStats; }
// PX_ENABLE_SIM_STATS

					void						buildActiveActors();
					void						buildActiveAndFrozenActors();
					PxActor**					getActiveActors(PxU32& nbActorsOut);
					void						setActiveActors(PxActor** actors, PxU32 nbActors);

					PxActor**					getFrozenActors(PxU32& nbActorsOut);

					void						finalizeContactStreamAndCreateHeader(PxContactPairHeader& header, 
						const ActorPairReport& aPair, 
						ContactStreamManager& cs, PxU32 removedShapeTestMask);

					PxTaskManager*				getTaskManagerPtr() const { return mTaskManager; }
					PxCudaContextManager*		getCudaContextManager() const { return mCudaContextManager; }

					void						shiftOrigin(const PxVec3& shift);

	PX_FORCE_INLINE bool						isCollisionPhaseActive() const	{ return mIsCollisionPhaseActive; }
	PX_FORCE_INLINE void						setCollisionPhaseToActive()		{ PX_ASSERT(!mIsCollisionPhaseActive); mIsCollisionPhaseActive = true; }
	PX_FORCE_INLINE void						setCollisionPhaseToInactive()	{ PX_ASSERT(mIsCollisionPhaseActive); mIsCollisionPhaseActive = false; }

					void						addShape_(RigidSim&, ShapeCore&);
					void						removeShape_(ShapeSim&, bool wakeOnLostTouch);

					void						registerShapeInNphase(RigidCore* rigidCore, const ShapeCore& shapeCore, const PxU32 transformCacheID);
					void						unregisterShapeFromNphase(const ShapeCore& shapeCore, const PxU32 transformCacheID);

					void						notifyNphaseOnUpdateShapeMaterial(const ShapeCore& shapeCore);

	// Get an array of the active actors.
	PX_FORCE_INLINE	BodyCore*const*				getActiveBodiesArray()			const	{ return mActiveBodies.begin();			}
	PX_FORCE_INLINE	PxU32						getNumActiveBodies()			const	{ return mActiveBodies.size();			}

	PX_FORCE_INLINE	BodyCore*const*				getActiveCompoundBodiesArray()	const	{ return mActiveCompoundBodies.begin();	}
	PX_FORCE_INLINE	PxU32						getNumActiveCompoundBodies()	const	{ return mActiveCompoundBodies.size();	}

	PX_FORCE_INLINE	PxU32						getNbInteractions(InteractionType::Enum type)		const	{ return mInteractions[type].size();	}
	PX_FORCE_INLINE	PxU32						getNbActiveInteractions(InteractionType::Enum type)	const	{ return mActiveInteractionCount[type];	}
	// Get all interactions of a certain type
	PX_FORCE_INLINE	ElementSimInteraction**		getInteractions(InteractionType::Enum type)					{ return mInteractions[type].begin();	}
	PX_FORCE_INLINE	ElementSimInteraction**		getActiveInteractions(InteractionType::Enum type)			{ return mInteractions[type].begin();	}

					void						registerInteraction(ElementSimInteraction* interaction, bool active);
					void						unregisterInteraction(ElementSimInteraction* interaction);

					void						notifyInteractionActivated(Interaction* interaction);
					void						notifyInteractionDeactivated(Interaction* interaction);

	// for pool management of interaction arrays, a major cause of dynamic allocation
					void**						allocatePointerBlock(PxU32 size);
					void						deallocatePointerBlock(void**, PxU32 size);
	private:
	// Get the number of active one-way dominator actors
	PX_FORCE_INLINE	PxU32						getActiveKinematicBodiesCount() const { return mActiveKinematicBodyCount; }

	// Get an iterator to the active one-way dominator actors
	PX_FORCE_INLINE	BodyCore*const*				getActiveKinematicBodies() const { return mActiveBodies.begin(); }

	// Get the number of active non-kinematic actors
	PX_FORCE_INLINE	PxU32						getActiveDynamicBodiesCount() const { return mActiveBodies.size() - mActiveKinematicBodyCount; }

	// Get the active non-kinematic actors
	PX_FORCE_INLINE	BodyCore*const*				getActiveDynamicBodies() const { return mActiveBodies.begin() + mActiveKinematicBodyCount; }

					void						swapInteractionArrayIndices(PxU32 id1, PxU32 id2, InteractionType::Enum type);
	public:
					void						addDirtyArticulationSim(ArticulationSim* artiSim);
					void						removeDirtyArticulationSim(ArticulationSim* artiSim);
		
					void						addToActiveList(ActorSim& actor);
					void						removeFromActiveList(ActorSim& actor);
					void						removeFromActiveCompoundBodyList(BodySim& actor);
					void						swapInActiveBodyList(BodySim& body); // call when an active body gets switched from dynamic to kinematic or vice versa

					void						addActiveBreakableConstraint(ConstraintSim*, ConstraintInteraction*);
					void						removeActiveBreakableConstraint(ConstraintSim*);
		//the Actor should register its top level shapes with these.
					void						removeBody(BodySim&);

					//lists of actors woken up or put to sleep last simulate
					void                        onBodyWakeUp(BodySim* body);
					void                        onBodySleep(BodySim* body);

	PX_FORCE_INLINE	bool						isValid() const	{ return (mLLContext != NULL);	}

					void						addToLostTouchList(ActorSim& body1, ActorSim& body2);

					PxU32						createAggregate(void* userData, PxU32 maxNumShapes, PxAggregateFilterHint filterHint, PxU32 envID);

					void						deleteAggregate(PxU32 id);

					Dy::FeatherstoneArticulation*	createLLArticulation(ArticulationSim* sim);
					void							destroyLLArticulation(Dy::FeatherstoneArticulation&);

		PX_FORCE_INLINE	PxPool2<ConstraintInteraction, 4096>&	getConstraintInteractionPool()			{ return mConstraintInteractionPool;	}
	public:
		PX_FORCE_INLINE	const PxsMaterialManager&	getMaterialManager()				const	{ return mMaterialManager;			}
		PX_FORCE_INLINE	PxsMaterialManager&			getMaterialManager()						{ return mMaterialManager;			}

		PX_FORCE_INLINE	const BroadphaseManager&	getBroadphaseManager()				const	{ return mBroadphaseManager;			}
		PX_FORCE_INLINE	BroadphaseManager&			getBroadphaseManager()						{ return mBroadphaseManager;			}
		PX_FORCE_INLINE	bool						fireOutOfBoundsCallbacks()
													{
														return mBroadphaseManager.fireOutOfBoundsCallbacks(mAABBManager, *mElementIDPool, mContextId);
													}
		// Collision filtering
						void						setFilterShaderData(const void* data, PxU32 dataSize);
		PX_FORCE_INLINE	const void*					getFilterShaderDataFast()				const	{ return mFilterShaderData;				}
		PX_FORCE_INLINE	PxU32						getFilterShaderDataSizeFast()			const	{ return mFilterShaderDataSize;			}
		PX_FORCE_INLINE	PxSimulationFilterShader	getFilterShaderFast()					const	{ return mFilterShader;					}
		PX_FORCE_INLINE	PxSimulationFilterCallback*	getFilterCallbackFast()					const	{ return mFilterCallback;				}
		PX_FORCE_INLINE	PxPairFilteringMode::Enum	getKineKineFilteringMode()				const	{ return mKineKineFilteringMode;		}
		PX_FORCE_INLINE	PxPairFilteringMode::Enum	getStaticKineFilteringMode()			const	{ return mStaticKineFilteringMode;		}

		PX_FORCE_INLINE	PxU32						getTimeStamp()							const	{ return mTimeStamp;					}
		PX_FORCE_INLINE	PxU32						getReportShapePairTimeStamp()			const	{ return mReportShapePairTimeStamp;		}

		PX_FORCE_INLINE	NPhaseCore*					getNPhaseCore()							const	{ return mNPhaseCore;					}

						void						checkConstraintBreakage();
						void						collectSolverResidual();
						PxSceneResidual				getSolverResidual()						const;

		PX_FORCE_INLINE	PxArray<TriggerPairExtraData>&		
													getTriggerBufferExtraData()						{ return *mTriggerBufferExtraData;		}
		PX_FORCE_INLINE	PxArray<PxTriggerPair>&	getTriggerBufferAPI()							{ return mTriggerBufferAPI;				}
						void						reserveTriggerReportBufferSpace(const PxU32 pairCount, PxTriggerPair*& triggerPairBuffer, TriggerPairExtraData*& triggerPairExtraBuffer);

		PX_FORCE_INLINE	ObjectIDTracker&			getActorIDTracker()								{ return *mActorIDTracker;				}

		PX_FORCE_INLINE	void						markReleasedBodyIDForLostTouch(PxU32 id)		{ mLostTouchPairsDeletedBodyIDs.growAndSet(id); }
						void						resizeReleasedBodyIDMaps(PxU32 maxActors, PxU32 numActors);

		PX_FORCE_INLINE	StaticSim&					getStaticAnchor()								{ return *mStaticAnchor;				}

		PX_FORCE_INLINE Bp::BoundsArray&			getBoundsArray()						const	{ return *mBoundsArray; }
		PX_FORCE_INLINE void						updateContactDistance(PxU32 idx, PxReal distance)	{ (*mContactDistance)[idx] = distance; mHasContactDistanceChanged = true; }
		PX_FORCE_INLINE SqBoundsManager&			getSqBoundsManager()					const	{ return *mSqBoundsManager; }

		PX_FORCE_INLINE BodyCore* const*			getSleepBodiesArray(PxU32& count)				{ count = mSleepBodies.size(); return mSleepBodies.getEntries(); }

		PX_FORCE_INLINE PxTaskManager&				getTaskManager()						const	{ PX_ASSERT(mTaskManager); return *mTaskManager; }

		PX_FORCE_INLINE void						setPostSolverVelocityNeeded()					{ mContactReportsNeedPostSolverVelocity = true; }

		PX_FORCE_INLINE	ObjectIDTracker&			getConstraintIDTracker()						{ return *mConstraintIDTracker; }
		PX_FORCE_INLINE	ObjectIDTracker&			getElementIDPool()								{ return *mElementIDPool; }
		PX_FORCE_INLINE PxBitMap&					getVelocityModifyMap()							{ return mVelocityModifyMap; }

						void*						allocateConstraintBlock(PxU32 size);
						void						deallocateConstraintBlock(void* addr, PxU32 size);

						void						stepSetupCollide(PxBaseTask* continuation);//This is very important to guarantee thread safety in the collide
		PX_FORCE_INLINE void						addToPosePreviewList(BodySim& b)				{ PX_ASSERT(!mPosePreviewBodies.contains(&b)); mPosePreviewBodies.insert(&b); }
		PX_FORCE_INLINE void						removeFromPosePreviewList(BodySim& b)			{ PX_ASSERT(mPosePreviewBodies.contains(&b)); mPosePreviewBodies.erase(&b); }
#if PX_DEBUG
		PX_FORCE_INLINE bool						isInPosePreviewList(BodySim& b)			const	{ return mPosePreviewBodies.contains(&b); }
#endif

		PX_FORCE_INLINE	void						setSpeculativeCCDRigidBody(PxU32 index)				{ mSpeculativeCCDRigidBodyBitMap.growAndSet(index); }
		PX_FORCE_INLINE void						resetSpeculativeCCDRigidBody(PxU32 index)			{ if(index < mSpeculativeCCDRigidBodyBitMap.size()) mSpeculativeCCDRigidBodyBitMap.reset(index); }

		PX_FORCE_INLINE	void						setSpeculativeCCDArticulationLink(PxU32 index)		{ mSpeculativeCDDArticulationBitMap.growAndSet(index); }
		PX_FORCE_INLINE void						resetSpeculativeCCDArticulationLink(PxU32 index)	{ if(index < mSpeculativeCDDArticulationBitMap.size()) mSpeculativeCDDArticulationBitMap.reset(index); }

		PX_FORCE_INLINE	PxU64						getContextId() const { return mContextId; }
		PX_FORCE_INLINE bool						isUsingGpuDynamicsOrBp() const { return mUseGpuBp || mUseGpuDynamics; }
		PX_FORCE_INLINE bool						isUsingGpuDynamicsAndBp() const { return mUseGpuBp && mUseGpuDynamics; }
		PX_FORCE_INLINE bool						isUsingGpuDynamics() const { return mUseGpuDynamics; }
		PX_FORCE_INLINE bool						isUsingGpuBp() const { return mUseGpuBp; }

		PX_FORCE_INLINE void						setDirectGPUAPIInitialized() { mIsDirectGPUAPIInitialized = true; }
		PX_FORCE_INLINE bool						isDirectGPUAPIInitialized() const { return mIsDirectGPUAPIInitialized; }

		// statistics counters increase/decrease
		PX_FORCE_INLINE	void						increaseNumKinematicsCounter() { mNbRigidKinematic++; }
		PX_FORCE_INLINE	void						decreaseNumKinematicsCounter() { mNbRigidKinematic--; }
		PX_FORCE_INLINE	void						increaseNumDynamicsCounter() { mNbRigidDynamics++; }
		PX_FORCE_INLINE	void						decreaseNumDynamicsCounter() { mNbRigidDynamics--; }

						ConstraintCore*				findConstraintCore(const ActorSim* sim0, const ActorSim* sim1);

		//internal private methods:
	private:
					void						activateEdgesInternal(IG::Edge::EdgeType type);
					void						releaseConstraints(bool endOfScene);
		PX_INLINE	void						clearBrokenConstraintBuffer()	{ mBrokenConstraints.clear();	}

		/////////////////////////////////////////////////////////////

					void						collideStep(PxBaseTask* continuation);
					void						advanceStep(PxBaseTask* continuation);

		// subroutines of collideStep/solveStep:
					void						kinematicsSetup(PxBaseTask* continuation);
					void						stepSetupSolve(PxBaseTask* continuation);

					void						processNarrowPhaseTouchEvents(PxBaseTask* continuation);
					void						setEdgesConnected(PxBaseTask* continuation);
					void						processNarrowPhaseLostTouchEvents(PxBaseTask* continuation);
					void						processNarrowPhaseLostTouchEventsIslands(PxBaseTask* continuation);
					void						processLostTouchPairs();
					void						integrateKinematicPose();
					void						updateKinematicCached(PxBaseTask* continuation);

					void						beforeSolver(PxBaseTask* continuation);
					void						checkForceThresholdContactEvents(PxU32 ccdPass);
	private:
					void						putObjectsToSleep();
					void						wakeObjectsUp();

					void						collectPostSolverVelocitiesBeforeCCD();

					void						clearSleepWakeBodies();
		PX_INLINE	void						cleanUpSleepBodies();
		PX_INLINE	void						cleanUpWokenBodies();
		PX_INLINE	void						cleanUpSleepOrWokenBodies(PxCoalescedHashSet<BodyCore*>& bodyList, PxU32 removeFlag, bool& validMarker);

	private:

		// Material manager
					PX_ALIGN(16, PxsMaterialManager	mMaterialManager);

					BroadphaseManager			mBroadphaseManager;
					PxU64						mContextId;

					PxArray<BodyCore*>			mActiveBodies;  // Sorted: kinematic before dynamic
					PxU32						mActiveKinematicBodyCount;  // Number of active kinematics. This is also the index in mActiveBodies where the active dynamic bodies start.
					PxU32						mActiveDynamicBodyCount;  // Number of active dynamics. This is also the index in mActiveBodies where the active soft bodies start.
					PxArray<BodyCore*>			mActiveCompoundBodies;

					BodyCore**					mActiveKinematicsCopy;
					PxU32						mActiveKinematicsCopyCapacity;

					// PT: this array used for:
					// - debug visualization
					// - processing trigger interactions
					// - updating dirty interactions
					PxArray<ElementSimInteraction*>	mInteractions[InteractionType::eTRACKED_IN_SCENE_COUNT];
					PxU32							mActiveInteractionCount[InteractionType::eTRACKED_IN_SCENE_COUNT]; // Interactions with id < activeInteractionCount are active

					template <typename T, PxU32 size>
					struct Block
					{
						PxU8 mem[sizeof(T)*size];
						Block() {}	// get around VS warning C4345, otherwise useless
					};

					typedef Block<void*, 8>	PointerBlock8;
					typedef Block<void*, 16> PointerBlock16;
					typedef Block<void*, 32> PointerBlock32;

					PxPool<PointerBlock8>	mPointerBlock8Pool;
					PxPool<PointerBlock16>	mPointerBlock16Pool;
					PxPool<PointerBlock32>	mPointerBlock32Pool;

					PxsContext*					mLLContext;

					Bp::AABBManagerBase*		mAABBManager;
					PxsCCDContext*				mCCDContext;
					PxI32						mNumFastMovingShapes;
					PxU32						mCCDPass;

					IG::SimpleIslandManager*	mSimpleIslandManager;

					Dy::Context*				mDynamicsContext;

					PxsMemoryManager*			mMemoryManager;

#if PX_SUPPORT_GPU_PHYSX
					PxsKernelWranglerManager*				mGpuWranglerManagers;
					PxsHeapMemoryAllocatorManager*			mHeapMemoryAllocationManager;
#endif

					PxsSimulationController*	mSimulationController;

					PxsSimulationControllerCallback*	mSimulationControllerCallback;

					PxSceneLimits				mLimits;

					PxVec3						mGravity;			//!< Gravity vector

					PxArray<PxContactPairHeader>
												mQueuedContactPairHeaders;
		//time:
		//constants set with setTiming():
					PxReal						mDt;						//delta time for current step.
					PxReal						mOneOverDt;					//inverse of dt.
		//stepping / counters:
					PxU32						mTimeStamp;					//Counts number of steps.
					PxU32						mReportShapePairTimeStamp;	//Timestamp for refreshing the shape pair report structure. Updated before delayed shape/actor deletion and before CCD passes.
		//containers:
		// Those ones contain shape ptrs from Actor, i.e. compound level, not subparts

					PxCoalescedHashSet<ConstraintCore*>		mConstraints;
												
					Bp::BoundsArray*						mBoundsArray;
					PxFloatArrayPinned*						mContactDistance;
					bool									mHasContactDistanceChanged;
					SqBoundsManager*						mSqBoundsManager;

					PxArray<BodySim*>				mCcdBodies;
					PxArray<PxTriggerPair>			mTriggerBufferAPI;
					PxArray<TriggerPairExtraData>*	mTriggerBufferExtraData;

					PxCoalescedHashSet<ArticulationCore*> mArticulations;
					PxCoalescedHashSet<ArticulationSim*> mDirtyArticulationSims;

					PxArray<ConstraintCore*>	mBrokenConstraints;
					PxCoalescedHashSet<ConstraintSim*> mActiveBreakableConstraints;

					// pools for joint buffers
					// The pools below currently cover all the internal cases
					typedef Block<PxU8, 128> MemBlock128;
					typedef Block<PxU8, 256> MemBlock256;
					typedef Block<PxU8, 384> MemBlock384;
					typedef Block<PxU8, 512> MemBlock512;

					PxPool2<MemBlock128, 8192>	mMemBlock128Pool;
					PxPool2<MemBlock256, 8192>	mMemBlock256Pool;
					PxPool2<MemBlock384, 8192>	mMemBlock384Pool;
					PxPool2<MemBlock512, 8192>	mMemBlock512Pool;

					// broad phase data:
					NPhaseCore*					mNPhaseCore;

					// Collision filtering
					void*						mFilterShaderData;
					PxU32						mFilterShaderDataSize;
					PxU32						mFilterShaderDataCapacity;
					PxSimulationFilterShader	mFilterShader;
					PxSimulationFilterCallback*	mFilterCallback;

			const	PxPairFilteringMode::Enum	mKineKineFilteringMode;
			const	PxPairFilteringMode::Enum	mStaticKineFilteringMode;

					PxCoalescedHashSet<BodyCore*> mSleepBodies;
					PxCoalescedHashSet<BodyCore*> mWokeBodies;

					bool						mWokeBodyListValid;
					bool						mSleepBodyListValid;
			const	bool						mEnableStabilization;

						PxArray<PxActor*>				mActiveActors;
						PxArray<PxActor*>				mFrozenActors;

						PxArray<const PxRigidBody*>	mClientPosePreviewBodies;	// buffer for bodies that requested early report of the integrated pose (eENABLE_POSE_INTEGRATION_PREVIEW).
																			// This buffer gets exposed to users. Is officially accessible from PxSimulationEventCallback::onAdvance()
																			// until the next simulate()/advance().
						PxArray<PxTransform>			mClientPosePreviewBuffer;	// buffer of newly integrated poses for the bodies that requested a preview. This buffer gets exposed
																			// to users.

						PxSimulationEventCallback*	mSimulationEventCallback;

					SimStats*					mStats;
					PxU32						mInternalFlags;	// PT: combination of ::SceneInternalFlag, looks like only 2 bits are needed
					PxSceneFlags				mPublicFlags;	// Copy of PxSceneDesc::flags, of type PxSceneFlag

					// PT: TODO: unify names, "tracker" or "pool"?
					ObjectIDTracker*			mConstraintIDTracker;	// PT: provides Sc::ContraintSim::mLowLevelConstraint::index
					ObjectIDTracker*			mActorIDTracker;		// PT: provides Sc::ActorSim::mId
					ObjectIDTracker*			mElementIDPool;			// PT: provides Sc::ElementSim::mElementID

					StaticCore					mAnchorCore;
					StaticSim*					mStaticAnchor;

					Cm::PreallocatingPool<ShapeSim>*	mShapeSimPool;
					Cm::PreallocatingPool<StaticSim>*	mStaticSimPool;
					Cm::PreallocatingPool<BodySim>*		mBodySimPool;
					PxPool2<ConstraintSim, 4096>		mConstraintSimPool;
					PxPool2<ArticulationJointSim, 4096>	mArticulationJointSimPool;
					LLArticulationRCPool*				mLLArticulationRCPool;

					PxHashMap<PxPair<const ActorSim*, const ActorSim*>, ConstraintCore*> mConstraintMap;
														
					PxPool2<ConstraintInteraction, 4096>	mConstraintInteractionPool;

					PxPool<SimStateData>*		mSimStateDataPool;

					BatchRemoveState*			mBatchRemoveState;

					PxArray<SimpleBodyPair>		mLostTouchPairs;
					PxBitMap					mLostTouchPairsDeletedBodyIDs;	// Need to know which bodies have been deleted when processing the lost touch pair list.
																				// Can't use the existing rigid object ID tracker class since this map needs to be cleared at
																				// another point in time.
					PxBitMap					mVelocityModifyMap;

					PxArray<PxvContactManagerTouchEvent> mTouchFoundEvents;
					PxArray<PxvContactManagerTouchEvent> mTouchLostEvents;

					PxBitMap								mDirtyShapeSimMap;

					PxU32						mDominanceBitMatrix[PX_MAX_DOMINANCE_GROUP];

					bool						mVisualizationParameterChanged;

					PxU32						mMaxNbArticulationLinks;

					// statics:
					PxU32						mNbRigidStatics;
					PxU32						mNbRigidDynamics;
					PxU32						mNbRigidKinematic;
					PxU32						mNbGeometries[PxGeometryType::eGEOMETRY_COUNT];

					//IG::Node::eTYPE_COUNT
					PxU32						mNumDeactivatingNodes[IG::Node::eTYPE_COUNT];

					// task decomposition
					void						setupBroadPhaseFirstAndSecondPassTasks(PxBaseTask* continuation);
					void						broadPhase(PxBaseTask* continuation);
					void						broadPhaseFirstPass(PxBaseTask* continuation);
					void						broadPhaseSecondPass(PxBaseTask* continuation);
					void						updateBroadPhase(PxBaseTask* continuation);
					void						preIntegrate(PxBaseTask* continuation);
					void						postBroadPhase(PxBaseTask* continuation);
					void						postBroadPhaseContinuation(PxBaseTask* continuation);
					void						preRigidBodyNarrowPhase(PxBaseTask* continuation);
					void						postBroadPhaseStage2(PxBaseTask* continuation);
					void						postBroadPhaseStage3(PxBaseTask* continuation);
					void						updateBoundsAndShapes(PxBaseTask* continuation);
					void						rigidBodyNarrowPhase(PxBaseTask* continuation);
					void						unblockNarrowPhase(PxBaseTask* continuation);
					void						islandGen(PxBaseTask* continuation);
					void						postIslandGen(PxBaseTask* continuation);
					void						solver(PxBaseTask* continuation);
					void						updateBodies(PxBaseTask* continuation);
					void						updateShapes(PxBaseTask* continuation);
					void						updateSimulationController(PxBaseTask* continuation);
					void						updateDynamics(PxBaseTask* continuation);
					void						updateDynamicsPostPartitioning(PxBaseTask* continuation);
					void						processLostContacts(PxBaseTask*);
					void						processLostContacts2(PxBaseTask*);
					void						processLostContacts3(PxBaseTask*);
					void						destroyManagers(PxBaseTask*);
					void						lostTouchReports(PxBaseTask*);
					void						unregisterInteractions(PxBaseTask*);
					void						postThirdPassIslandGen(PxBaseTask*);
					void						postSolver(PxBaseTask* continuation);
					void						afterIntegration(PxBaseTask* continuation);  // performs sleep check, for instance
					void						postCCDPass(PxBaseTask* continuation);
					void						ccdBroadPhaseAABB(PxBaseTask* continuation);
					void						ccdBroadPhase(PxBaseTask* continuation);
					void						updateCCDMultiPass(PxBaseTask* continuation);
					void						updateCCDSinglePass(PxBaseTask* continuation);
					void						updateCCDSinglePassStage2(PxBaseTask* continuation);
					void						updateCCDSinglePassStage3(PxBaseTask* continuation);
					void						finalizationPhase(PxBaseTask* continuation);

					void						postNarrowPhase(PxBaseTask* continuation);

					void						addShapes(NpShape*const* shapes, PxU32 nbShapes, size_t ptrOffset, RigidSim& sim, PxBounds3* outBounds);
					void						removeShapes(RigidSim& , PxInlineArray<ShapeSim*, 64>& , PxInlineArray<const ShapeCore*, 64>&, bool wakeOnLostTouch);

	private:
					void						addShapes(NpShape*const* shapes, PxU32 nbShapes, size_t ptrOffset, RigidSim& sim, ShapeSim*& prefetchedShapeSim, PxBounds3* outBounds);
					void						updateContactDistances(PxBaseTask* continuation);
					void						updateDirtyShapes(PxBaseTask* continuation);

					Cm::DelegateTask<Scene, &Scene::secondPassNarrowPhase>		mSecondPassNarrowPhase;
					Cm::DelegateTask<Scene, &Scene::postNarrowPhase>			mPostNarrowPhase;
					Cm::DelegateTask<Scene, &Scene::finalizationPhase>			mFinalizationPhase;
					Cm::DelegateTask<Scene, &Scene::updateCCDMultiPass>			mUpdateCCDMultiPass;

					//multi-pass ccd stuff
					PxArray<Cm::DelegateTask<Scene, &Scene::updateCCDSinglePass> >			mUpdateCCDSinglePass;
					PxArray<Cm::DelegateTask<Scene, &Scene::updateCCDSinglePassStage2> >	mUpdateCCDSinglePass2;
					PxArray<Cm::DelegateTask<Scene, &Scene::updateCCDSinglePassStage3> >	mUpdateCCDSinglePass3;
					PxArray<Cm::DelegateTask<Scene, &Scene::ccdBroadPhaseAABB> >			mCCDBroadPhaseAABB;
					PxArray<Cm::DelegateTask<Scene, &Scene::ccdBroadPhase> >				mCCDBroadPhase;
					PxArray<Cm::DelegateTask<Scene, &Scene::postCCDPass> >					mPostCCDPass;

					Cm::DelegateTask<Scene, &Scene::afterIntegration>					mAfterIntegration;
					Cm::DelegateTask<Scene, &Scene::postSolver>							mPostSolver;
					Cm::DelegateTask<Scene, &Scene::solver>								mSolver;
					Cm::DelegateTask<Scene, &Scene::updateBodies>						mUpdateBodies;
					Cm::DelegateTask<Scene, &Scene::updateShapes>						mUpdateShapes;
					Cm::DelegateTask<Scene, &Scene::updateSimulationController>			mUpdateSimulationController;
					Cm::DelegateTask<Scene, &Scene::updateDynamics>						mUpdateDynamics;
					Cm::DelegateTask<Scene, &Scene::updateDynamicsPostPartitioning>		mUpdateDynamicsPostPartitioning;
					Cm::DelegateTask<Scene, &Scene::processLostContacts>				mProcessLostContactsTask;
					Cm::DelegateTask<Scene, &Scene::processLostContacts2>				mProcessLostContactsTask2;
					Cm::DelegateTask<Scene, &Scene::processLostContacts3>				mProcessLostContactsTask3;
					Cm::DelegateTask<Scene, &Scene::destroyManagers>					mDestroyManagersTask;
					Cm::DelegateTask<Scene, &Scene::lostTouchReports>					mLostTouchReportsTask;
					Cm::DelegateTask<Scene, &Scene::unregisterInteractions>				mUnregisterInteractionsTask;
					Cm::DelegateTask<Scene,
						&Scene::processNarrowPhaseLostTouchEventsIslands>				mProcessNarrowPhaseLostTouchTasks;
					Cm::DelegateTask<Scene,
						&Scene::processNarrowPhaseLostTouchEvents>						mProcessNPLostTouchEvents;
					Cm::DelegateTask<Scene, &Scene::postThirdPassIslandGen>				mPostThirdPassIslandGenTask;
#if !USE_SPLIT_SECOND_PASS_ISLAND_GEN
					Cm::DelegateTask<Scene, &Scene::postIslandGen>						mPostIslandGen;
#endif
					Cm::DelegateTask<Scene, &Scene::islandGen>							mIslandGen;
					Cm::DelegateTask<Scene, &Scene::preRigidBodyNarrowPhase>			mPreRigidBodyNarrowPhase;
					Cm::DelegateTask<Scene, &Scene::setEdgesConnected>					mSetEdgesConnectedTask;
					Cm::DelegateFanoutTask<Scene, &Scene::updateBoundsAndShapes>		mUpdateBoundAndShapeTask;
					Cm::DelegateTask<Scene, &Scene::rigidBodyNarrowPhase>				mRigidBodyNarrowPhase;
					Cm::DelegateTask<Scene, &Scene::unblockNarrowPhase>					mRigidBodyNPhaseUnlock;
					Cm::DelegateTask<Scene, &Scene::postBroadPhase>						mPostBroadPhase;
					Cm::DelegateTask<Scene, &Scene::postBroadPhaseContinuation>			mPostBroadPhaseCont;
					Cm::DelegateTask<Scene, &Scene::postBroadPhaseStage2>				mPostBroadPhase2;
					Cm::DelegateFanoutTask<Scene, &Scene::postBroadPhaseStage3>			mPostBroadPhase3;
					Cm::DelegateTask<Scene, &Scene::preallocateContactManagers>			mPreallocateContactManagers;
					Cm::DelegateTask<Scene, &Scene::islandInsertion>					mIslandInsertion;
					Cm::DelegateTask<Scene, &Scene::registerContactManagers>			mRegisterContactManagers;
					Cm::DelegateTask<Scene, &Scene::registerInteractions>				mRegisterInteractions;
					Cm::DelegateTask<Scene, &Scene::registerSceneInteractions>			mRegisterSceneInteractions;
					Cm::DelegateTask<Scene, &Scene::broadPhase>							mBroadPhase;
					Cm::DelegateTask<Scene, &Scene::advanceStep>						mAdvanceStep;
					Cm::DelegateTask<Scene, &Scene::collideStep>						mCollideStep;
					Cm::DelegateTask<Scene, &Scene::broadPhaseFirstPass>				mBpFirstPass;
					Cm::DelegateTask<Scene, &Scene::broadPhaseSecondPass>				mBpSecondPass;
					Cm::DelegateTask<Scene, &Scene::updateBroadPhase>					mBpUpdate;
					Cm::DelegateTask<Scene, &Scene::preIntegrate>						mPreIntegrate;

					Cm::FlushPool														mTaskPool;
					PxTaskManager*														mTaskManager;
					PxCudaContextManager*												mCudaContextManager;

					bool																mContactReportsNeedPostSolverVelocity;
					bool																mUseGpuDynamics;
					bool																mUseGpuBp;
					bool																mCCDBp;

					SimulationStage::Enum												mSimulationStage;

					PxCoalescedHashSet<const BodySim*>									mPosePreviewBodies;  // list of bodies that requested early report of the integrated pose (eENABLE_POSE_INTEGRATION_PREVIEW).

					PxArray<PxsContactManager*>											mPreallocatedContactManagers;
					PxArray<ShapeInteraction*>											mPreallocatedShapeInteractions;
					PxArray<ElementInteractionMarker*>									mPreallocatedInteractionMarkers;

					// PT: class members that should ideally just be local parameters passed from task to task
					OverlapFilterTask*													mOverlapFilterTaskHead;	// PT: tmp data passed from finishBroadPhase to preallocateContactManagers
					PxArray<FilterInfo>													mFilterInfo;			// PT: tmp data passed from finishBroadPhase to preallocateContactManagers
					OnOverlapCreatedTask*												mOverlapCreatedTaskHead;
					IslandInsertionTask*												mIslandInsertionTaskHead;
					PxArray<IG::EdgeIndex>												mPreallocatedHandles;
					DelayedGPUTypes														mGPUTypes;				// PT: GPU types found in last part of Sc::Scene::islandInsertion(), delayed for later processing
					//~class members that should ideally just be local parameters passed from task to task

					PxBitMap															mSpeculativeCCDRigidBodyBitMap;
					PxBitMap															mSpeculativeCDDArticulationBitMap;

					bool																mIsCollisionPhaseActive;
					// Set to true as long as collision phase is active (used as an indicator that it is OK to read object pose, 
					// velocity etc. compared to the solver phase where these properties might get written to).
					bool																mIsDirectGPUAPIInitialized;


				public:
					// For OmniPVD. To notify NpScene that actor's sleeping state has changed.
					typedef void(*SleepingStateChangedCallback)(PxRigidDynamic&, bool);
					PxSceneResidual				 mResidual;
					SleepingStateChangedCallback mOnSleepingStateChanged;

// PT: moved all the GPU-related code & data here in an attempt to clearly separate the CPU/GPU bits
#if PX_SUPPORT_GPU_PHYSX
	public:
					void								gpu_addToActiveList(ActorSim& actorSim, ActorCore* appendedActorCore);
					void								gpu_removeFromActiveList(ActorSim& actorSim, PxU32 removedActiveIndex);
					void								gpu_clearSleepWakeBodies();
					void								gpu_buildActiveActors();
					void								gpu_buildActiveAndFrozenActors();
					void								gpu_setSimulationEventCallback(PxSimulationEventCallback* callback);
					PxU32								gpu_cleanUpSleepAndWokenBodies();
					void								gpu_fireOnSleepCallback(PxActor** actors);
					void								gpu_fireOnWakeCallback(PxActor** actors);
					void								gpu_updateBounds();
					void								gpu_releasePools();
					void								gpu_release();

					void								addDeformableSurface(DeformableSurfaceCore&);
					void								removeDeformableSurface(DeformableSurfaceCore&);
					void								addDeformableVolume(DeformableVolumeCore&);
					void								removeDeformableVolume(DeformableVolumeCore&);
					void								addParticleSystem(ParticleSystemCore&);
					void								removeParticleSystem(ParticleSystemCore&);

	PX_FORCE_INLINE	PxU32								getNbDeformableSurfaces()	const	{ return mDeformableSurfaces.size();		}
	PX_FORCE_INLINE	DeformableSurfaceCore* const*		getDeformableSurfaces()				{ return mDeformableSurfaces.getEntries();	}

	PX_FORCE_INLINE	PxU32								getNbDeformableVolumes()	const	{ return mDeformableVolumes.size();	}
	PX_FORCE_INLINE	DeformableVolumeCore* const*		getDeformableVolumes()				{ return mDeformableVolumes.getEntries();	}

	PX_FORCE_INLINE	PxU32								getNbParticleSystems()	const	{ return mParticleSystems.size();		}
	PX_FORCE_INLINE	ParticleSystemCore* const*			getParticleSystems()			{ return mParticleSystems.getEntries();	}

	// PT: redundant?
	// Get the active deformable surface actors
	PX_FORCE_INLINE	DeformableSurfaceCore*const*		getActiveDeformableSurfacesArray()	const { return mActiveDeformableSurfaces.begin(); }
	PX_FORCE_INLINE	PxU32								getNumActiveDeformableSurfaces()	const { return mActiveDeformableSurfaces.size(); }

	// PT: redundant?
	// Get the active deformable surface actors
	PX_FORCE_INLINE	DeformableVolumeCore*const*			getActiveDeformableVolumesArray()	const { return mActiveDeformableVolumes.begin(); }
	PX_FORCE_INLINE	PxU32								getNumActiveDeformableVolumes()		const { return mActiveDeformableVolumes.size(); }

	PX_FORCE_INLINE	const PxsDeformableSurfaceMaterialManager&	getDeformableSurfaceMaterialManager()	const	{ return mDeformableSurfaceMaterialManager;	}
	PX_FORCE_INLINE	PxsDeformableSurfaceMaterialManager&		getDeformableSurfaceMaterialManager()			{ return mDeformableSurfaceMaterialManager;	}

	PX_FORCE_INLINE	const PxsDeformableVolumeMaterialManager&	getDeformableVolumeMaterialManager()	const	{ return mDeformableVolumeMaterialManager;	}
	PX_FORCE_INLINE	PxsDeformableVolumeMaterialManager&			getDeformableVolumeMaterialManager()			{ return mDeformableVolumeMaterialManager;	}

	PX_FORCE_INLINE	const PxsPBDMaterialManager&		getPBDMaterialManager()				const	{ return mPBDMaterialManager;		}
	PX_FORCE_INLINE	PxsPBDMaterialManager&				getPBDMaterialManager()						{ return mPBDMaterialManager;		}

					Dy::DeformableSurface*				createLLDeformableSurface(DeformableSurfaceSim* sim);
					void								destroyLLDeformableSurface(Dy::DeformableSurface& femCloth);

					Dy::DeformableVolume*				createLLDeformableVolume(DeformableVolumeSim* sim);
					void								destroyLLDeformableVolume(Dy::DeformableVolume& deformableVolume);

					Dy::ParticleSystem*					createLLParticleSystem(ParticleSystemSim* sim);
					void								destroyLLParticleSystem(Dy::ParticleSystem& softBody);

					void								cleanUpSleepDeformableVolumes();
					void								cleanUpWokenDeformableVolumes();
					void								cleanUpSleepOrWokenDeformableVolumes(PxCoalescedHashSet<DeformableVolumeCore*>& bodyList, PxU32 removeFlag, bool& validMarker);

					void								addDeformableSurfaceSimControl(DeformableSurfaceCore& core);
					void								removeDeformableSurfaceSimControl(DeformableSurfaceCore& core);
					void								addDeformableVolumeSimControl(DeformableVolumeCore& core);
					void								removeDeformableVolumeSimControl(DeformableVolumeCore& core);
					void								addParticleSystemSimControl(ParticleSystemCore& core);
					void								removeParticleSystemSimControl(ParticleSystemCore& core);

					void								addParticleFilter(Sc::ParticleSystemCore* core, DeformableVolumeSim& sim, PxU32 particleId, PxU32 userBufferId, PxU32 tetId);
					void								removeParticleFilter(Sc::ParticleSystemCore* core, DeformableVolumeSim& sim, PxU32 particleId, PxU32 userBufferId, PxU32 tetId);

					PxU32								addParticleAttachment(Sc::ParticleSystemCore* core, DeformableVolumeSim& sim, PxU32 particleId, PxU32 userBufferId, PxU32 tetId, const PxVec4& barycentric);
					void								removeParticleAttachment(Sc::ParticleSystemCore* core, DeformableVolumeSim& sim, PxU32 handle);

					void								addRigidFilter(BodyCore* core, DeformableVolumeSim& sim, PxU32 vertId);
					void								removeRigidFilter(BodyCore* core, DeformableVolumeSim& sim, PxU32 vertId);

					PxU32								addRigidAttachment(BodyCore* core, DeformableVolumeSim& sim, PxU32 vertId, const PxVec3& actorSpacePose, PxConeLimitedConstraint* constraint, bool doConversion);
					void								removeRigidAttachment(BodyCore* core, DeformableVolumeSim& sim, PxU32 handle);
						
					void								addTetRigidFilter(BodyCore* core, DeformableVolumeSim& sim, PxU32 tetIdx);
					void								removeTetRigidFilter(BodyCore* core, DeformableVolumeSim& sim, PxU32 tetIdx);

					PxU32								addTetRigidAttachment(BodyCore* core, DeformableVolumeSim& sim, PxU32 tetIdx, const PxVec4& barycentric, const PxVec3& actorSpacePose, PxConeLimitedConstraint* constraint, bool doConversion);
						
					void								addSoftBodyFilter(DeformableVolumeCore& core, PxU32 tetIdx0, DeformableVolumeSim& sim, PxU32 tetIdx1);
					void								removeSoftBodyFilter(DeformableVolumeCore& core, PxU32 tetIdx0, DeformableVolumeSim& sim, PxU32 tetIdx1);
					void								addSoftBodyFilters(DeformableVolumeCore& core, DeformableVolumeSim& sim, PxU32* tetIndices0, PxU32* tetIndices1, PxU32 tetIndicesSize);
					void								removeSoftBodyFilters(DeformableVolumeCore& core, DeformableVolumeSim& sim, PxU32* tetIndices0, PxU32* tetIndices1, PxU32 tetIndicesSize);

					PxU32								addSoftBodyAttachment(DeformableVolumeCore& core, PxU32 tetIdx0, const PxVec4& triBarycentric0, DeformableVolumeSim& sim, PxU32 tetIdx1, const PxVec4& tetBarycentric1, PxConeLimitedConstraint* constraint, PxReal constraintOffset, bool doConversion);
					void								removeSoftBodyAttachment(DeformableVolumeCore& core, DeformableVolumeSim& sim, PxU32 handle);

					void								addClothFilter(DeformableSurfaceCore& core, PxU32 triIdx, Sc::DeformableVolumeSim& sim, PxU32 tetIdx);
					void								removeClothFilter(DeformableSurfaceCore& core, PxU32 triIdx, Sc::DeformableVolumeSim& sim, PxU32 tetIdx);

					PxU32								addClothAttachment(DeformableSurfaceCore& core, PxU32 triIdx, const PxVec4& triBarycentric, DeformableVolumeSim& sim, PxU32 tetIdx, const PxVec4& tetBarycentric, PxConeLimitedConstraint* constraint, PxReal constraintOffset, bool doConversion);
					void								removeClothAttachment(DeformableSurfaceCore& core, DeformableVolumeSim& sim, PxU32 handle);

					PxU32								addRigidAttachment(BodyCore* core, DeformableSurfaceSim& sim, PxU32 vertId, const PxVec3& actorSpacePose, PxConeLimitedConstraint* constraint);
					void								removeRigidAttachment(BodyCore* core, DeformableSurfaceSim& sim, PxU32 handle);

					void								addClothFilter(DeformableSurfaceCore& core0, PxU32 triIdx0, Sc::DeformableSurfaceSim& sim1, PxU32 triIdx1);
					void								removeClothFilter(DeformableSurfaceCore& core, PxU32 triIdx0, DeformableSurfaceSim& sim1, PxU32 triIdx1);

					PxU32								addTriClothAttachment(DeformableSurfaceCore& core0, PxU32 triIdx0, const PxVec4& barycentric0, Sc::DeformableSurfaceSim& sim1, PxU32 triIdx1, const PxVec4& barycentric1);
					void								removeTriClothAttachment(DeformableSurfaceCore& core, DeformableSurfaceSim& sim1, PxU32 handle);

					void								addTriRigidFilter(BodyCore* core, DeformableSurfaceSim& sim, PxU32 triIdx);
					void								removeTriRigidFilter(BodyCore* core, DeformableSurfaceSim& sim, PxU32 triIdx);

					PxU32								addTriRigidAttachment(BodyCore* core, DeformableSurfaceSim& sim, PxU32 triIdx, const PxVec4& barycentric, const PxVec3& actorSpacePose, PxConeLimitedConstraint* constraint);
					void								removeTriRigidAttachment(BodyCore* core, DeformableSurfaceSim& sim, PxU32 handle);

					void								addRigidAttachment(BodyCore* core, ParticleSystemSim& sim);
					void								removeRigidAttachment(BodyCore* core, ParticleSystemSim& sim);

					PxActor**							getActiveDeformableVolumeActors(PxU32& nbActorsOut);
					void								setActiveDeformableVolumeActors(PxActor** actors, PxU32 nbActors);

					//PxActor**							getActiveDeformableSurfaceActors(PxU32& nbActorsOut);
					//void								setActiveDeformableSurfaceActors(PxActor** actors, PxU32 nbActors);

#if !USE_SPLIT_SECOND_PASS_ISLAND_GEN
					PxU64								mPadding;
#endif
					PxU64								mPadding2;
					PX_ALIGN(16, PxsDeformableSurfaceMaterialManager	mDeformableSurfaceMaterialManager);
					PX_ALIGN(16, PxsDeformableVolumeMaterialManager		mDeformableVolumeMaterialManager);
					PX_ALIGN(16, PxsPBDMaterialManager		mPBDMaterialManager);

					PxArray<DeformableSurfaceCore*>		mActiveDeformableSurfaces;
					PxArray<DeformableVolumeCore*>		mActiveDeformableVolumes;
					PxArray<ParticleSystemCore*>		mActiveParticleSystems;

					PxCoalescedHashSet<DeformableSurfaceCore*>	mDeformableSurfaces;
					PxCoalescedHashSet<DeformableVolumeCore*>	mDeformableVolumes;
					PxCoalescedHashSet<ParticleSystemCore*>		mParticleSystems;

					PxCoalescedHashSet<DeformableVolumeCore*>	mSleepDeformableVolumes;
					PxCoalescedHashSet<DeformableVolumeCore*>	mWokeDeformableVolumes;

					PxArray<PxActor*>					mActiveDeformableSurfaceActors;
					PxArray<PxActor*>					mActiveDeformableVolumeActors;

					LLDeformableSurfacePool*			mLLDeformableSurfacePool;
					LLDeformableVolumePool*				mLLDeformableVolumePool;
					LLParticleSystemPool*				mLLParticleSystemPool;

					PxHashMap<PxPair<PxU32, PxU32>, ParticleOrSoftBodyRigidInteraction> mParticleOrSoftBodyRigidInteractionMap;

					bool								mWokeDeformableVolumeListValid;
					bool								mSleepDeformableVolumeListValid;
#endif
	};

	bool	activateInteraction(Interaction* interaction);
	void	activateInteractions(Sc::ActorSim& actorSim);
	void	deactivateInteractions(Sc::ActorSim& actorSim);

} // namespace Sc

}

#endif