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#ifndef PX_PHYSICS_SCP_BODYSIM
#define PX_PHYSICS_SCP_BODYSIM

#include "PsUtilities.h"
#include "PsIntrinsics.h"
#include "ScRigidSim.h"
#include "PxvDynamics.h"
#include "ScBodyCore.h"
#include "ScSimStateData.h"
#include "ScConstraintGroupNode.h"
#include "PxRigidDynamic.h"
#include "DyArticulation.h"
#include "PxsRigidBody.h"
#include "PxsSimpleIslandManager.h"

namespace physx
{
namespace Bp
{
	class BoundsArray;
}
	class PxsTransformCache;
	class PxsSimulationController;
namespace Sc
{
	#define SC_NOT_IN_SCENE_INDEX		0xffffffff  // the body is not in the scene yet
	#define SC_NOT_IN_ACTIVE_LIST_INDEX	0xfffffffe  // the body is in the scene but not in the active list

	class Scene;
	class ArticulationSim;

	static const PxReal ScInternalWakeCounterResetValue = 20.0f*0.02f;

#if PX_VC 
    #pragma warning(push)   
	#pragma warning( disable : 4324 ) // Padding was added at the end of a structure because of a __declspec(align) value.
#endif

	class BodySim : public RigidSim
	{
	public:
		enum InternalFlags
		{
			//BF_DISABLE_GRAVITY		= 1 << 0,	// Don't apply the scene's gravity

			BF_HAS_STATIC_TOUCH		= 1 << 1,	// Set when a body is part of an island with static contacts. Needed to be able to recalculate adaptive force if this changes
			BF_KINEMATIC_MOVED		= 1 << 2,	// Set when the kinematic was moved

			BF_ON_DEATHROW			= 1 << 3,	// Set when the body is destroyed

			BF_IS_IN_SLEEP_LIST		= 1 << 4,	// Set when the body is added to the list of bodies which were put to sleep
			BF_IS_IN_WAKEUP_LIST	= 1 << 5,	// Set when the body is added to the list of bodies which were woken up
			BF_SLEEP_NOTIFY			= 1 << 6,	// A sleep notification should be sent for this body (and not a wakeup event, even if the body is part of the woken list as well)
			BF_WAKEUP_NOTIFY		= 1 << 7,	// A wake up notification should be sent for this body (and not a sleep event, even if the body is part of the sleep list as well)

			BF_HAS_CONSTRAINTS		= 1 << 8,	// Set if the body has one or more constraints
			BF_KINEMATIC_SETTLING	= 1 << 9,	// Set when the body was moved kinematically last frame
			BF_KINEMATIC_SETTLING_2 = 1 << 10,
			BF_KINEMATIC_MOVE_FLAGS = BF_KINEMATIC_MOVED | BF_KINEMATIC_SETTLING | BF_KINEMATIC_SETTLING_2, //Used to clear kinematic masks in 1 call
			BF_KINEMATIC_SURFACE_VELOCITY = 1 << 11, //Set when the application calls setKinematicVelocity. Actor remains awake until application calls clearKinematicVelocity. 
			BF_IS_COMPOUND_RIGID	= 1 << 12	// Set when the body is a compound actor, we dont want to set the sq bounds

			// PT: WARNING: flags stored on 16-bits now.
		};

	public:
												BodySim(Scene&, BodyCore&, bool);
		virtual									~BodySim();

						void					notifyAddSpatialAcceleration();
						void					notifyClearSpatialAcceleration();
						void					notifyAddSpatialVelocity();
						void					notifyClearSpatialVelocity();
						void					updateCached(Cm::BitMapPinned* shapeChangedMap);
						void					updateCached(PxsTransformCache& transformCache, Bp::BoundsArray& boundsArray);
						void					updateContactDistance(PxReal* contactDistance, const PxReal dt, Bp::BoundsArray& boundsArray);

		// hooks for actions in body core when it's attached to a sim object. Generally
		// we get called after the attribute changed.
			
		virtual			void					postActorFlagChange(PxU32 oldFlags, PxU32 newFlags);
						void					postBody2WorldChange();
						void					postSetWakeCounter(PxReal t, bool forceWakeUp);
						void					postSetKinematicTarget();
						void					postSwitchToKinematic();
						void					postSwitchToDynamic();
						void					postPosePreviewChange(const PxU32 posePreviewFlag);  // called when PxRigidBodyFlag::eENABLE_POSE_INTEGRATION_PREVIEW changes

		PX_FORCE_INLINE const PxTransform&		getBody2World()		const	{ return getBodyCore().getCore().body2World;		}
		PX_FORCE_INLINE const PxTransform&		getBody2Actor()		const	{ return getBodyCore().getCore().getBody2Actor();	}
		PX_FORCE_INLINE const PxsRigidBody&		getLowLevelBody()	const	{ return mLLBody;									}
		PX_FORCE_INLINE	PxsRigidBody&			getLowLevelBody()			{ return mLLBody;									}
						void					wakeUp();  // note: for user API call purposes only, i.e., use from BodyCore. For simulation internal purposes there is internalWakeUp().
						void					putToSleep();

						void					disableCompound();

		static			PxU32					getRigidBodyOffset()		{ return  PxU32(PX_OFFSET_OF_RT(BodySim, mLLBody));}

	private:
						void					activate();
						void					deactivate();

		//---------------------------------------------------------------------------------
		// Constraint projection
		//---------------------------------------------------------------------------------
	public:
		PX_FORCE_INLINE	ConstraintGroupNode*	getConstraintGroup()								{ return mConstraintGroup; }
		PX_FORCE_INLINE	void					setConstraintGroup(ConstraintGroupNode* node)		{ mConstraintGroup = node; }

		//// A list of active projection trees in the scene might be better
		//PX_FORCE_INLINE void					projectPose() { PX_ASSERT(mConstraintGroup); ConstraintGroupNode::projectPose(*mConstraintGroup); }

		//---------------------------------------------------------------------------------
		// Kinematics
		//---------------------------------------------------------------------------------
	public:
		PX_FORCE_INLINE bool					isKinematic()								const	{ return getBodyCore().getFlags() & PxRigidBodyFlag::eKINEMATIC;	}
		PX_FORCE_INLINE bool					isArticulationLink()						const	{ return getActorType() == PxActorType::eARTICULATION_LINK; }
						void					calculateKinematicVelocity(PxReal oneOverDt);
						void					updateKinematicPose();
						bool					deactivateKinematic();
	private:
		PX_FORCE_INLINE void					initKinematicStateBase(BodyCore&, bool asPartOfCreation);

		//---------------------------------------------------------------------------------
		// Sleeping
		//---------------------------------------------------------------------------------
	public:
		PX_FORCE_INLINE	bool					isActive() const { return (mActiveListIndex < SC_NOT_IN_ACTIVE_LIST_INDEX); }
						void					setActive(bool active, PxU32 infoFlag=0);  // see ActivityChangeInfoFlag

		PX_FORCE_INLINE PxU32					getActiveListIndex() const { return mActiveListIndex; }  // if the body is active, the index is smaller than SC_NOT_IN_ACTIVE_LIST_INDEX
		PX_FORCE_INLINE void					setActiveListIndex(PxU32 index) { mActiveListIndex = index; }

		PX_FORCE_INLINE PxU32					getActiveCompoundListIndex() const { return mActiveCompoundListIndex; }  // if the body is active and is compound, the index is smaller than SC_NOT_IN_ACTIVE_LIST_INDEX
		PX_FORCE_INLINE void					setActiveCompoundListIndex(PxU32 index) { mActiveCompoundListIndex = index; }

						void					internalWakeUp(PxReal wakeCounterValue=ScInternalWakeCounterResetValue);
						void					internalWakeUpArticulationLink(PxReal wakeCounterValue);	// called by ArticulationSim to wake up this link

						PxReal					updateWakeCounter(PxReal dt, PxReal energyThreshold, const Cm::SpatialVector& motionVelocity);

						void					resetSleepFilter();
						void					notifyReadyForSleeping();			// inform the sleep island generation system that the body is ready for sleeping
						void					notifyNotReadyForSleeping();		// inform the sleep island generation system that the body is not ready for sleeping
		PX_FORCE_INLINE bool					checkSleepReadinessBesidesWakeCounter();  // for API triggered changes to test sleep readiness

		PX_FORCE_INLINE void					registerCountedInteraction() { mLLBody.getCore().numCountedInteractions++; PX_ASSERT(mLLBody.getCore().numCountedInteractions); }
		PX_FORCE_INLINE void					unregisterCountedInteraction() { PX_ASSERT(mLLBody.getCore().numCountedInteractions); mLLBody.getCore().numCountedInteractions--;}
		PX_FORCE_INLINE PxU32					getNumCountedInteractions()	const { return mLLBody.getCore().numCountedInteractions; }

		PX_FORCE_INLINE Ps::IntBool				isFrozen()	const	{ return Ps::IntBool(mLLBody.mInternalFlags & PxsRigidBody::eFROZEN);	}
	private:
		PX_FORCE_INLINE	void					notifyWakeUp(bool wakeUpInIslandGen = false);					// inform the sleep island generation system that the object got woken up
		PX_FORCE_INLINE	void					notifyPutToSleep();				// inform the sleep island generation system that the object was put to sleep
		PX_FORCE_INLINE void					internalWakeUpBase(PxReal wakeCounterValue);

		//---------------------------------------------------------------------------------
		// External velocity changes
		//---------------------------------------------------------------------------------
	public:
						void					updateForces(PxReal dt, PxsRigidBody** updatedBodySims, PxU32* updatedBodyNodeIndices, 
													PxU32& index, Cm::SpatialVector* acceleration, const bool useAcceleration, bool simUsesAdaptiveForce);
	private:
		PX_FORCE_INLINE void					raiseVelocityModFlag(VelocityModFlags f)				{ mVelModState |= f;					}
		PX_FORCE_INLINE void					clearVelocityModFlag(VelocityModFlags f)				{ mVelModState &= ~f;					}
		PX_FORCE_INLINE bool					readVelocityModFlag(VelocityModFlags f)					{ return (mVelModState & f) != 0;		}
		PX_FORCE_INLINE void					setForcesToDefaults(bool enableGravity);

		//---------------------------------------------------------------------------------
		// Miscellaneous
		//---------------------------------------------------------------------------------
	public:
		PX_FORCE_INLINE	PxU16					getInternalFlag()								const	{ return mInternalFlags;  }
		PX_FORCE_INLINE PxU16					readInternalFlag(InternalFlags flag)			const	{ return PxU16(mInternalFlags & flag);	}
		PX_FORCE_INLINE void					raiseInternalFlag(InternalFlags flag)					{ mInternalFlags |= flag;				}
		PX_FORCE_INLINE void					clearInternalFlag(InternalFlags flag)					{ mInternalFlags &= ~flag;				}
		PX_FORCE_INLINE PxU32					getFlagsFast()									const	{ return getBodyCore().getFlags();		}

		PX_FORCE_INLINE void					incrementBodyConstraintCounter()						{ mLLBody.mCore->numBodyInteractions++;					}
		PX_FORCE_INLINE void					decrementBodyConstraintCounter()						{ PX_ASSERT(mLLBody.mCore->numBodyInteractions>0); mLLBody.mCore->numBodyInteractions--; }

		PX_FORCE_INLINE	BodyCore&				getBodyCore()									const	{ return static_cast<BodyCore&>(getRigidCore());		}

		PX_INLINE		ArticulationSim*		getArticulation()								const	{ return mArticulation; }
						void 					setArticulation(ArticulationSim* a, PxReal wakeCounter, bool asleep, PxU32 bodyIndex);

		PX_FORCE_INLINE IG::NodeIndex			getNodeIndex() const									{ return mNodeIndex; }

		PX_FORCE_INLINE void					onConstraintAttach()									{ raiseInternalFlag(BF_HAS_CONSTRAINTS); registerCountedInteraction(); }
						void					onConstraintDetach();

		PX_FORCE_INLINE	void					onOriginShift(const PxVec3& shift)						{ mLLBody.mLastTransform.p -= shift; }

		PX_FORCE_INLINE	bool					notInScene()									const	{ return mActiveListIndex == SC_NOT_IN_SCENE_INDEX; }

		PX_FORCE_INLINE bool					usingSqKinematicTarget()						const	
		{ 	
			PxU32 ktFlags(PxRigidBodyFlag::eUSE_KINEMATIC_TARGET_FOR_SCENE_QUERIES | PxRigidBodyFlag::eKINEMATIC);
			return (getFlagsFast()&ktFlags) == ktFlags;
		}

		PX_FORCE_INLINE	PxU32					getNbShapes()									const	{ return mElementCount; }

						void					createSqBounds();
						void					destroySqBounds();
						void					freezeTransforms(Cm::BitMapPinned* shapeChangedMap);
						void					invalidateSqBounds();
	private:

		//---------------------------------------------------------------------------------
		// Base body
		//---------------------------------------------------------------------------------
						PxsRigidBody			mLLBody;

		//---------------------------------------------------------------------------------
		// Island manager
		//---------------------------------------------------------------------------------
						IG::NodeIndex			mNodeIndex;

		//---------------------------------------------------------------------------------
		// External velocity changes
		//---------------------------------------------------------------------------------
		// VelocityMod data allocated on the fly when the user applies velocity changes
		// which need to be accumulated.
		// VelMod dirty flags stored in BodySim so we can save ourselves the expense of looking at 
		// the separate velmod data if no forces have been set.
						PxU16					mInternalFlags;
						PxU8					mVelModState;

		//---------------------------------------------------------------------------------
		// Sleeping
		//---------------------------------------------------------------------------------
						PxU32					mActiveListIndex;	// Used by Scene to track active bodies
						PxU32					mActiveCompoundListIndex;	// Used by Scene to track active compound bodies

		//---------------------------------------------------------------------------------
		// Articulation
		//---------------------------------------------------------------------------------
						ArticulationSim*		mArticulation;				// NULL if not in an articulation

		//---------------------------------------------------------------------------------
		// Joints & joint groups
		//---------------------------------------------------------------------------------

		// This is a tree data structure that gives us the projection order of joints in which this body is the tree root.
		// note: the link of the root body is not necces. the root link due to the re-rooting of the articulation!
						ConstraintGroupNode*	mConstraintGroup;
	};

#if PX_VC 
     #pragma warning(pop) 
#endif

} // namespace Sc

PX_FORCE_INLINE void Sc::BodySim::setForcesToDefaults(bool enableGravity)
{
	if (!(mLLBody.mCore->mFlags & PxRigidBodyFlag::eRETAIN_ACCELERATIONS))
	{
		SimStateData* simStateData = getBodyCore().getSimStateData(false);
		if(simStateData) 
		{
			VelocityMod* velmod = simStateData->getVelocityModData();
			velmod->clear();
		}

		if (enableGravity)
			mVelModState = VMF_GRAVITY_DIRTY;	// We want to keep the gravity flag to make sure the acceleration gets changed to gravity-only
												// in the next step (unless the application adds new forces of course)
		else
			mVelModState = 0;
	}
	else
	{
		SimStateData* simStateData = getBodyCore().getSimStateData(false);
		if (simStateData)
		{
			VelocityMod* velmod = simStateData->getVelocityModData();
			velmod->clearPerStep();
		}

		mVelModState &= (~(VMF_VEL_DIRTY));
	}
}

PX_FORCE_INLINE bool Sc::BodySim::checkSleepReadinessBesidesWakeCounter()
{
	const BodyCore& bodyCore = getBodyCore();
	const SimStateData* simStateData = bodyCore.getSimStateData(false);
	const VelocityMod* velmod = simStateData ? simStateData->getVelocityModData() : NULL;

	bool readyForSleep = bodyCore.getLinearVelocity().isZero() && bodyCore.getAngularVelocity().isZero();
	if (readVelocityModFlag(VMF_ACC_DIRTY))
	{
		readyForSleep = readyForSleep && (!velmod || velmod->getLinearVelModPerSec().isZero());
		readyForSleep = readyForSleep && (!velmod || velmod->getAngularVelModPerSec().isZero());
	}
	if (readVelocityModFlag(VMF_VEL_DIRTY))
	{
		readyForSleep = readyForSleep && (!velmod || velmod->getLinearVelModPerStep().isZero());
		readyForSleep = readyForSleep && (!velmod || velmod->getAngularVelModPerStep().isZero());
	}

	return readyForSleep;
}


}

#endif
