CWE-ou-minkata/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/

#include "hsTypes.h"
#include "plCollisionDetector.h"
#include "../plMessage/plCollideMsg.h"
#include "plgDispatch.h"
#include "../plMessage/plActivatorMsg.h"
#include "../pnMessage/plCameraMsg.h"
#include "../pnMessage/plTimeMsg.h"
#include "../plMessage/plInputIfaceMgrMsg.h"
#include "../pnInputCore/plControlEventCodes.h"
#include "../pnNetCommon/plNetApp.h"
#include "../pnSceneObject/plSceneObject.h"
#include "../pnNetCommon/plNetApp.h"
#include "../plNetClient/plNetLinkingMgr.h"

#include "plPhysical.h"

#include "../pnMessage/plPlayerPageMsg.h"
#include "../plMessage/plSimStateMsg.h"

#include "../pnSceneObject/plCoordinateInterface.h"
#include "../plAvatar/plArmatureMod.h"
#include "../plAvatar/plAvatarMgr.h"
#include "../plAvatar/plAvBrainHuman.h"
#include "../plAvatar/plAvBrainDrive.h"
#include "../plAvatar/plPhysicalControllerCore.h"

#include "../plModifier/plDetectorLog.h"

#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
#include "../plPhysX/plSimulationMgr.h"
#endif

plArmatureMod* plCollisionDetector::IGetAvatarModifier(plKey key)
{
	plSceneObject* avObj = plSceneObject::ConvertNoRef(key->ObjectIsLoaded());
	if (avObj)
	{
		// search through its modifiers to see if one of them is an avatar modifier
		plArmatureMod* avMod = nil;
		for (int i = 0; i < avObj->GetNumModifiers(); i++)
		{
			const plModifier* mod = avObj->GetModifier(i);
			// see if it is an avatar mod base class
			avMod = const_cast<plArmatureMod*>(plArmatureMod::ConvertNoRef(mod));
			if (avMod)
				return avMod;
		}
	}

	return nil;
}

bool plCollisionDetector::IIsDisabledAvatar(plKey key)
{
	plArmatureMod* avMod = IGetAvatarModifier(key);
	plArmatureBrain* avBrain = avMod ? avMod->GetCurrentBrain() : nil;
	return (plAvBrainDrive::ConvertNoRef(avBrain) != nil);
}

hsBool plCollisionDetector::MsgReceive(plMessage* msg)
{
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);

	if (pCollMsg)
	{
		// If the avatar is disabled (flying around), don't trigger
		if (IIsDisabledAvatar(pCollMsg->fOtherKey))
			return false;

		if (fType & kTypeBump) 
		{
			if (!fBumped && !fTriggered)
			{
				for (int i = 0; i < fReceivers.Count(); i++)
				{
					plActivatorMsg* pMsg = TRACKED_NEW plActivatorMsg;
					pMsg->AddReceiver( fReceivers[i] );

					if (fProxyKey)
						pMsg->fHiteeObj = fProxyKey;
					else
						pMsg->fHiteeObj = GetTarget()->GetKey();
					pMsg->fHitterObj = pCollMsg->fOtherKey;
					pMsg->SetSender(GetKey());
					pMsg->SetTriggerType( plActivatorMsg::kCollideContact );
					plgDispatch::MsgSend( pMsg );
				}
				fBumped = true;
				fTriggered = true;
				plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
				return true;
			}
			if (fTriggered)
			{
				fBumped = true;
				return true;
			}
			return false;
		}

		for (int i = 0; i < fReceivers.Count(); i++)
		{
			plActivatorMsg* pMsg = TRACKED_NEW plActivatorMsg;
			pMsg->AddReceiver( fReceivers[i] );
			if (fProxyKey)
				pMsg->fHiteeObj = fProxyKey;
			else
				pMsg->fHiteeObj = GetTarget()->GetKey();
			pMsg->fHitterObj = pCollMsg->fOtherKey;
			pMsg->SetSender(GetKey());
			
			if (fType & kTypeEnter && pCollMsg->fEntering)
			{
				pMsg->SetTriggerType( plActivatorMsg::kCollideEnter );
				plgDispatch::MsgSend( pMsg );
				continue;
			}
			if (fType & kTypeUnEnter && pCollMsg->fEntering)
			{
				pMsg->SetTriggerType( plActivatorMsg::kEnterUnTrigger );
				plgDispatch::MsgSend( pMsg );
				continue;
			}
			if(fType & kTypeExit && !pCollMsg->fEntering)
			{
				pMsg->SetTriggerType( plActivatorMsg::kCollideExit );
				plgDispatch::MsgSend( pMsg );
				continue;
			}
			if(fType & kTypeUnExit && !pCollMsg->fEntering)
			{
				pMsg->SetTriggerType( plActivatorMsg::kExitUnTrigger );
				plgDispatch::MsgSend( pMsg );
				continue;
			}
			if (fType & kTypeAny)
			{
				pMsg->SetTriggerType( plActivatorMsg::kCollideContact );
				plgDispatch::MsgSend( pMsg );
				continue;
			}

			delete (pMsg);
		}
		return true;
	}

	plEvalMsg* pEval = plEvalMsg::ConvertNoRef(msg);
	if (pEval)
	{
		if (!fBumped && fTriggered)
		{
			plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
			for (int i = 0; i < fReceivers.Count(); i++)
			{
				plActivatorMsg* pMsg = TRACKED_NEW plActivatorMsg;
				pMsg->AddReceiver( fReceivers[i] );
				if (fProxyKey)
					pMsg->fHiteeObj = fProxyKey;
				else
					pMsg->fHiteeObj = GetTarget()->GetKey();
				pMsg->SetSender(GetKey());
				pMsg->SetTriggerType( plActivatorMsg::kCollideUnTrigger );
				plgDispatch::MsgSend( pMsg );
				fTriggered = false;
			}
		}
		else
		if (fTriggered && fBumped)
		{
			fBumped = false;
		}
		return true;
	}

	return plDetectorModifier::MsgReceive(msg);
}

void plCollisionDetector::Read(hsStream* stream, hsResMgr* mgr)
{
	plDetectorModifier::Read(stream, mgr);
	stream->ReadSwap(&fType);
}
void plCollisionDetector::Write(hsStream* stream, hsResMgr* mgr)
{
	plDetectorModifier::Write(stream, mgr);
	stream->WriteSwap(fType);
}

/////////////////////////////////
/////////////////////////////////
/////////////////////////////////
/////////////////////////////////
// camera region detector

plCameraRegionDetector::~plCameraRegionDetector()
{
	for(int i = 0; i < fMessages.Count(); i++)
	{	
		plMessage* pMsg = fMessages[i];
		fMessages.Remove(i);
		delete(pMsg);
	}
	fMessages.SetCountAndZero(0);
}

void plCameraRegionDetector::ISendTriggerMsg()
{
	for (int i = 0; i < fMessages.Count(); ++i)
	{   
		hsRefCnt_SafeRef(fMessages[i]);
		if (fIsInside)
			fMessages[i]->SetCmd(plCameraMsg::kEntering);
		else
			fMessages[i]->ClearCmd(plCameraMsg::kEntering);

		plgDispatch::MsgSend(fMessages[i]);
	}
}

hsBool plCameraRegionDetector::MsgReceive(plMessage* msg)
{
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);
	if (pCollMsg)
	{
		// camera collisions are only for the local player
		if (plNetClientApp::GetInstance()->GetLocalPlayerKey() != pCollMsg->fOtherKey)
			return true;
		
		if (!fWaitingForEval)
			IRegisterForEval();

		fEntering = (pCollMsg->fEntering != 0);

#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
		fLastStep = plSimulationMgr::GetInstance()->GetStepCount();
#endif
		return true;
	}

	return plObjectInVolumeDetector::MsgReceive(msg);
}
void plCameraRegionDetector::Read(hsStream* stream, hsResMgr* mgr)
{
	plDetectorModifier::Read(stream, mgr);
	int n = stream->ReadSwap32();
	fMessages.SetCountAndZero(n);
	for(int i = 0; i < n; i++ )
	{	
		plCameraMsg* pMsg =  plCameraMsg::ConvertNoRef(mgr->ReadCreatable(stream));
		fMessages[i] = pMsg;
	}

}
void plCameraRegionDetector::Write(hsStream* stream, hsResMgr* mgr)
{
	plDetectorModifier::Write(stream, mgr);
	stream->WriteSwap32(fMessages.GetCount());
	for(int i = 0; i < fMessages.GetCount(); i++ )
		mgr->WriteCreatable( stream, fMessages[i] );

}

void plCameraRegionDetector::IHandleEval(plEvalMsg*)
{
#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
	if (plSimulationMgr::GetInstance()->GetStepCount() - fLastStep > 1)
	{
#endif // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
		if (fIsInside != fEntering)
		{
			fIsInside = fEntering;
			DetectorLog("%s CameraRegion: %s", fIsInside ? "Entering" : "Exiting", GetKeyName());
			ISendTriggerMsg();
		}
		plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
		fWaitingForEval = false;
#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
	}
#endif
}

/////////////////////////////////
/////////////////////////////////
/////////////////////////////////
/////////////////////////////////
// object-in-volume detector

void plObjectInVolumeDetector::ITrigger(plKey hitter, bool entering)
{
#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
	for (bookKeepingList::iterator it = fCollisionList.begin(); it != fCollisionList.end(); ++it)
	{
		plCollisionBookKeepingInfo* collisionInfo = *it;
		if (collisionInfo->fHitter == hitter)
		{
			collisionInfo->fEntering = entering;
			collisionInfo->fLastStep = plSimulationMgr::GetInstance()->GetStepCount();
			return;
		}
	}
#endif // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND

	plCollisionBookKeepingInfo* collisionInfo = new plCollisionBookKeepingInfo(hitter, entering);
	fCollisionList.push_back(collisionInfo);
#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
	collisionInfo->fLastStep = plSimulationMgr::GetInstance()->GetStepCount();
#endif
}

void plObjectInVolumeDetector::IRegisterForEval()
{
	fWaitingForEval = true;
	plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
}

void plObjectInVolumeDetector::ISendTriggerMsg(plKey hitter, bool entering)
{
	plActivatorMsg* activatorMsg = new plActivatorMsg();
	activatorMsg->SetSender(GetKey());
	activatorMsg->AddReceivers(fReceivers);
	activatorMsg->fHiteeObj = fProxyKey ? fProxyKey : GetTarget()->GetKey();
	activatorMsg->fHitterObj = hitter;
	if (entering)
		activatorMsg->SetTriggerType(plActivatorMsg::kVolumeEnter);
	else
		activatorMsg->SetTriggerType(plActivatorMsg::kVolumeExit);

	plgDispatch::MsgSend(activatorMsg);
}

hsBool plObjectInVolumeDetector::MsgReceive(plMessage* msg)
{
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);
	if (pCollMsg)
	{
		// If the avatar is disabled (flying around), don't trigger
		if (IIsDisabledAvatar(pCollMsg->fOtherKey))
			return false;
       
		if (!fWaitingForEval)
			IRegisterForEval();

		ITrigger(pCollMsg->fOtherKey, (pCollMsg->fEntering != 0));
		return true;
	}

	plEvalMsg* pEval = plEvalMsg::ConvertNoRef(msg);
	if (pEval)
		IHandleEval(pEval);

	plPlayerPageMsg* pageMsg = plPlayerPageMsg::ConvertNoRef(msg);
	if (pageMsg && pageMsg->fUnload)
	{
		ITrigger(pageMsg->fPlayer, false);
	}

	return plCollisionDetector::MsgReceive(msg);
}

void plObjectInVolumeDetector::IHandleEval(plEvalMsg*)
{
	bookKeepingList::iterator it = fCollisionList.begin();
	while (it != fCollisionList.end())
	{
		plCollisionBookKeepingInfo* collisionInfo = *it;
#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
		if (plSimulationMgr::GetInstance()->GetStepCount() - collisionInfo->fLastStep > 1)
		{
#endif // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
			bool wasInside = fCurrentResidents.find(collisionInfo->fHitter) != fCurrentResidents.end();
			if (collisionInfo->fEntering != wasInside)
			{
				if (collisionInfo->fEntering)
				{
					fCurrentResidents.insert(collisionInfo->fHitter);
					DetectorLog("%s: Sending Volume Enter ActivatorMsg", GetKeyName());
					ISendTriggerMsg(collisionInfo->fHitter, true);
				}
				else
				{
					fCurrentResidents.erase(collisionInfo->fHitter);
					DetectorLog("%s: Sending Volume Exit ActivatorMsg", GetKeyName());
					ISendTriggerMsg(collisionInfo->fHitter, false);
				}
			}

			delete collisionInfo;
#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
			it = fCollisionList.erase(it);
		}
		else
		{
			++it;
		}
#else
			++it;
#endif // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
	}

#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
	if (fCollisionList.empty())
	{
		plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
		fWaitingForEval = false;
	}
#else
	fCollisionList.clear();
	plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
	fWaitingForEval = false;
#endif // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
}

void plObjectInVolumeDetector::SetTarget(plSceneObject* so)
{
	plCollisionDetector::SetTarget(so);

	if (so)
		plgDispatch::Dispatch()->RegisterForExactType(plPlayerPageMsg::Index(), GetKey());
	else
		plgDispatch::Dispatch()->UnRegisterForExactType(plPlayerPageMsg::Index(), GetKey());
}

void plObjectInVolumeDetector::Read(hsStream* stream, hsResMgr* mgr)
{
	plCollisionDetector::Read(stream, mgr);
}

void plObjectInVolumeDetector::Write(hsStream* stream, hsResMgr* mgr)
{
	plCollisionDetector::Write(stream, mgr);
}


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


plObjectInVolumeAndFacingDetector::plObjectInVolumeAndFacingDetector() :
	fFacingTolerance(0),
	fNeedWalkingForward(false),
	fAvatarInVolume(false),
	fTriggered(false)
{
}

plObjectInVolumeAndFacingDetector::~plObjectInVolumeAndFacingDetector()
{
}

void plObjectInVolumeAndFacingDetector::SetFacingTolerance(int degrees)
{
	fFacingTolerance = hsCosine(hsScalarDegToRad(degrees));
}

void plObjectInVolumeAndFacingDetector::ICheckForTrigger()
{
	plArmatureMod* armMod = plAvatarMgr::GetInstance()->GetLocalAvatar();
	plSceneObject* avatar = armMod ? armMod->GetTarget(0) : nil;
	plSceneObject* target = GetTarget();

	if (armMod && target)
	{
		hsVector3 playerView = avatar->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kView);
		hsVector3 objView = target->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kView);

		playerView.Normalize();
		objView.Normalize();

		hsScalar dot = playerView * objView;
//		hsStatusMessageF("Dot: %f Tolerance: %f", dot, fFacingTolerance);
		bool facing = dot >= fFacingTolerance;

		bool movingForward = false;
		if (fNeedWalkingForward)
		{
			// And are we walking towards it?
			plArmatureBrain* abrain =  armMod->FindBrainByClass(plAvBrainHuman::Index()); //armMod->GetCurrentBrain();
			plAvBrainHuman* brain = plAvBrainHuman::ConvertNoRef(abrain);
			if (brain && brain->IsMovingForward() && brain->fWalkingStrategy->IsOnGround())
				movingForward = true;
		}
		else
			movingForward = true;

		if (facing && movingForward && !fTriggered)
		{
			DetectorLog("%s: Trigger InVolume&Facing", GetKeyName());
			fTriggered = true;
			ISendTriggerMsg(avatar->GetKey(), true);
		}
		else if (!facing && fTriggered)
		{
			DetectorLog("%s: Untrigger InVolume&Facing", GetKeyName());
			fTriggered = false;
			ISendTriggerMsg(avatar->GetKey(), false);
		}
	}
}

hsBool plObjectInVolumeAndFacingDetector::MsgReceive(plMessage* msg)
{
	// Avatar is entering or exiting our detector box
	plCollideMsg* collMsg = plCollideMsg::ConvertNoRef(msg);
	if (collMsg)
	{
		// make sure this is the local player... the notify will be the thing that propagates over the network
		if (plNetClientApp::GetInstance()->GetLocalPlayerKey() != collMsg->fOtherKey)
			return true;

		// If the avatar is disabled (flying around), don't trigger
		if (IIsDisabledAvatar(collMsg->fOtherKey))
			return false;

		fAvatarInVolume = (collMsg->fEntering != 0);

		if (fAvatarInVolume)
		{
			plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
			ICheckForTrigger();
		}
		else
		{
			plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());

			// Avatar is leaving the volume, make sure to untrigger if we haven't already
			if (fTriggered)
			{
				fTriggered = false;
				ISendTriggerMsg(plNetClientApp::GetInstance()->GetLocalPlayerKey(), false);
			}
		}

		return true;
	}

	// Avatar is inside our detector box, so every frame we check if we need to trigger
	plEvalMsg* evalMsg = plEvalMsg::ConvertNoRef(msg);
	if (evalMsg)
	{
		ICheckForTrigger();
		return true;
	}

	return plObjectInVolumeDetector::MsgReceive(msg);
}

void plObjectInVolumeAndFacingDetector::Read(hsStream* stream, hsResMgr* mgr)
{
	plObjectInVolumeDetector::Read(stream, mgr);

	fFacingTolerance = stream->ReadSwapScalar();
	fNeedWalkingForward = stream->Readbool();
}

void plObjectInVolumeAndFacingDetector::Write(hsStream* stream, hsResMgr* mgr)
{
	plObjectInVolumeDetector::Write(stream, mgr);

	stream->WriteSwapScalar(fFacingTolerance);
	stream->Writebool(fNeedWalkingForward);
}

/////////////////////////////////
/////////////////////////////////
/////////////////////////////////
/////////////////////////////////
// subworld region detector

plSubworldRegionDetector::~plSubworldRegionDetector()
{
}


hsBool plSubworldRegionDetector::MsgReceive(plMessage* msg)
{
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);

	if (pCollMsg)
	{	
		if (plNetClientApp::GetInstance()->GetLocalPlayerKey() != pCollMsg->fOtherKey)
			return true;

		plArmatureMod* avMod = IGetAvatarModifier(pCollMsg->fOtherKey);
		if (avMod)
		{
			DetectorLog("%s subworld detector %s", pCollMsg->fEntering ? "Entering" : "Exiting", GetKeyName());

			if ((pCollMsg->fEntering && !fOnExit) ||
				(!pCollMsg->fEntering && fOnExit))
			{
				if (fSub)
				{
					plSceneObject* SO = plSceneObject::ConvertNoRef(fSub->ObjectIsLoaded());
					if (SO)
					{
						DetectorLogSpecial("Switching to subworld %s", fSub->GetName());

						plKey nilKey;
						plSubWorldMsg* msg = TRACKED_NEW plSubWorldMsg(GetKey(), avMod->GetKey(), fSub);
						msg->Send();
					}
				}
				else
				{
					DetectorLogSpecial("Switching to main subworld");
					plSubWorldMsg* msg = TRACKED_NEW plSubWorldMsg(GetKey(), avMod->GetKey(), nil);
					msg->Send();
				}
			}
		}

		return true;
	}

	return plCollisionDetector::MsgReceive(msg);
}

void plSubworldRegionDetector::Read(hsStream* stream, hsResMgr* mgr)
{
	plDetectorModifier::Read(stream, mgr);
	fSub = mgr->ReadKey(stream);
	fOnExit = stream->ReadBool();
}
void plSubworldRegionDetector::Write(hsStream* stream, hsResMgr* mgr)
{
	plDetectorModifier::Write(stream, mgr);
	mgr->WriteKey(stream, fSub);
	stream->WriteBool(fOnExit);
}

///////////////////////////////////
///////////////////////////////////
/// plPanicLinkDetector
///////////////////////////////////
hsBool plPanicLinkRegion::MsgReceive(plMessage* msg)
{

	if (plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg))
	{
		if (plNetClientApp::GetInstance()->GetLocalPlayerKey() != pCollMsg->fOtherKey)
			return true;

		if (pCollMsg->fEntering)
		{
			plArmatureMod* avMod = IGetAvatarModifier(pCollMsg->fOtherKey);
			if (avMod)
			{
				if (avMod->IsLinkedIn())
				{
					hsPoint3 kinPos;
					if (avMod->GetController())
					{
						avMod->GetController()->GetPositionSim(kinPos);
						DetectorLogSpecial("Avatar is panic linking. KinPos at %f,%f,%f and is %s", kinPos.fX, kinPos.fY, kinPos.fZ, avMod->GetController()->IsEnabled() ? "enabled" : "disabled");
					}
					avMod->PanicLink(fPlayLinkOutAnim);
				} else
					DetectorLogRed("PANIC LINK %s before we actually linked in!", GetKey()->GetName());
			}
		}

		return true;
	}

	return plCollisionDetector::MsgReceive(msg);
}

void plPanicLinkRegion::Read(hsStream* stream, hsResMgr* mgr)
{
	plCollisionDetector::Read(stream, mgr);

	fPlayLinkOutAnim = stream->ReadBool();
}

void plPanicLinkRegion::Write(hsStream* stream, hsResMgr* mgr)
{
	plCollisionDetector::Write(stream, mgr);

	stream->WriteBool(fPlayLinkOutAnim);
}

/////////////////////////////////////////////////////////////////
//
// PLSIMPLEREGIONSENSOR
//
/////////////////////////////////////////////////////////////////

// ctor default
plSimpleRegionSensor::plSimpleRegionSensor()
: fEnterMsg(nil), fExitMsg(nil)
{
}

// ctor canonical
plSimpleRegionSensor::plSimpleRegionSensor(plMessage *enterMsg, plMessage *exitMsg)
: fEnterMsg(enterMsg), fExitMsg(exitMsg)
{
}

// dtor
plSimpleRegionSensor::~plSimpleRegionSensor()
{
	if(fEnterMsg)
		fEnterMsg->UnRef();
	if(fExitMsg)
		fExitMsg->UnRef();
}

// WRITE
void plSimpleRegionSensor::Write(hsStream *stream, hsResMgr *mgr)
{
	plSingleModifier::Write(stream, mgr);
	if(fEnterMsg)
	{
		stream->Writebool(true);
		mgr->WriteCreatable(stream, fEnterMsg);
	} else {
		stream->Writebool(false);
	}
	if(fExitMsg)
	{
		stream->Writebool(true);
		mgr->WriteCreatable(stream, fExitMsg);
	} else {
		stream->Writebool(false);
	}
}

// READ
void plSimpleRegionSensor::Read(hsStream *stream, hsResMgr *mgr)
{
	plSingleModifier::Read(stream, mgr);
	if(stream->Readbool())
	{
		fEnterMsg = plMessage::ConvertNoRef(mgr->ReadCreatable(stream));
	} else {
		fEnterMsg = nil;
	}

	if(stream->Readbool())
	{
		fExitMsg = plMessage::ConvertNoRef(mgr->ReadCreatable(stream));
		hsAssert(fExitMsg, "Corrupted plSimpleRegionSensor during read.");
	} else {
		fExitMsg = nil;
	}
}

// MSGRECEIVE
hsBool plSimpleRegionSensor::MsgReceive(plMessage *msg)
{
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);

	if (pCollMsg)
	{
		// make sure this is the local player... the notify will be the thing that propagates over the network
		if (plNetClientApp::GetInstance()->GetLocalPlayerKey() != pCollMsg->fOtherKey)
			return true;

		plKey theThingWhatDoneHitUs = pCollMsg->fOtherKey;
		
		if(pCollMsg->fEntering)
		{
			if(fEnterMsg)
			{
				fEnterMsg->ClearReceivers();
				fEnterMsg->AddReceiver(theThingWhatDoneHitUs);
				fEnterMsg->Ref();
				fEnterMsg->Send();
			}
		} 
		else {
			if(fExitMsg)
			{
				fExitMsg->ClearReceivers();
				fExitMsg->AddReceiver(theThingWhatDoneHitUs);
				fExitMsg->Ref();
				fExitMsg->Send();
			}
		}
		return true;
	}
	return plSingleModifier::MsgReceive(msg);
}

// IEVAL
hsBool plSimpleRegionSensor::IEval(double secs, hsScalar del, UInt32 dirty)
{
	return false;
}

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

// Nuke the Read/Write functions on the next file format change
void plSwimDetector::Write(hsStream *stream, hsResMgr *mgr)
{
	plSimpleRegionSensor::Write(stream, mgr);

	stream->WriteByte(0);
	stream->WriteSwapScalar(0);
	stream->WriteSwapScalar(0);
}

void plSwimDetector::Read(hsStream *stream, hsResMgr *mgr)
{
	plSimpleRegionSensor::Read(stream, mgr);

	stream->ReadByte();
	stream->ReadSwapScalar();
	stream->ReadSwapScalar();
}
hsBool plSwimDetector::MsgReceive(plMessage *msg)
{
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);

	if (pCollMsg)
	{
		//removed local player check because this will apply the brain to the local 
		//controller of the foreign avatar which we still want.
		//and if we prop swim state by notify messages we still have a chance of missing it from players
		//who were in the region before we linked in
		plKey theThingWhatDoneHitUs = pCollMsg->fOtherKey;
		if(pCollMsg->fEntering)
		{
			if(fEnterMsg)
			{
				fEnterMsg->ClearReceivers();
				fEnterMsg->AddReceiver(theThingWhatDoneHitUs);
				fEnterMsg->Ref();
				fEnterMsg->Send();
			}
		} 
		else {
		if(fExitMsg)
			{
				fExitMsg->ClearReceivers();
				fExitMsg->AddReceiver(theThingWhatDoneHitUs);
				fExitMsg->Ref();
				fExitMsg->Send();
			}
		}
		return true;
	}
	return plSimpleRegionSensor::MsgReceive(msg);
}
hsBool  plRidingAnimatedPhysicalDetector::MsgReceive(plMessage *msg)
{
	
	plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);

	if (pCollMsg)
	{
		//removed local player check because this will apply the brain to the local 
		//controller of the foreign avatar which we still want.
		//and if we prop  state by notify messages we still have a chance of missing it from players
		//who were in the region before we linked in
		plKey theThingWhatDoneHitUs = pCollMsg->fOtherKey;
		if(pCollMsg->fEntering)
		{
			if(fEnterMsg)
			{
				fEnterMsg->ClearReceivers();
				fEnterMsg->AddReceiver(theThingWhatDoneHitUs);
				fEnterMsg->Ref();
				fEnterMsg->Send();
			}
		} 
		else {
		if(fExitMsg)
			{
				fExitMsg->ClearReceivers();
				fExitMsg->AddReceiver(theThingWhatDoneHitUs);
				fExitMsg->Ref();
				fExitMsg->Send();
			}
		}
		return true;
	}
	return plSimpleRegionSensor::MsgReceive(msg);
}