CWE-ou-minkata/Sources/Plasma/PubUtilLib/plPhysX/plSimulationMgr.cpp

/*==LICENSE==*

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

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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/
#include "plSimulationMgr.h"

#include <NxPhysics.h>

#include "plgDispatch.h"
#include "hsTimer.h"
#include "plProfile.h"
#include "plPXPhysical.h"
#include "plPXPhysicalControllerCore.h"
#include "plPXConvert.h"
#include "plLOSDispatch.h"
#include "plPhysical/plPhysicsSoundMgr.h"
#include "plStatusLog/plStatusLog.h"
#include "pnSceneObject/plSimulationInterface.h"
#include "pnSceneObject/plCoordinateInterface.h"
#include "pnNetCommon/plSDLTypes.h"
#include "plMessage/plCollideMsg.h"
#include "plMessage/plAgeLoadedMsg.h"

#include "plModifier/plDetectorLog.h"

#ifndef PLASMA_EXTERNAL_RELEASE
#include "plPipeline/plDebugText.h"
bool plSimulationMgr::fDisplayAwakeActors=false;
#endif //PLASMA_EXTERNAL_RELEASE
// This gets called by PhysX whenever a trigger gets penetrated.  This is used
// for any Plasma detectors.
class SensorReport : public NxUserTriggerReport
{
    virtual void onTrigger(NxShape& triggerShape, NxShape& otherShape, NxTriggerFlag status)
    {
        plKey otherKey = nil;
        bool doReport = false;

        // Get our trigger physical.  This should definitely have a plPXPhysical
        plPXPhysical* triggerPhys = (plPXPhysical*)triggerShape.getActor().userData;

        // Get the triggerer. If it doesn't have a plPXPhyscial, it's an avatar
        plPXPhysical* otherPhys = (plPXPhysical*)otherShape.getActor().userData;
        if (otherPhys)
        {
            otherKey = otherPhys->GetObjectKey();
            doReport = triggerPhys->DoReportOn((plSimDefs::Group)otherPhys->GetGroup());
        }
        else
        {
            plPXPhysicalControllerCore* controller = plPXPhysicalControllerCore::GetController(otherShape.getActor());
            if (controller)
            {
                otherKey = controller->GetOwner();
                doReport = triggerPhys->DoReportOn(plSimDefs::kGroupAvatar);
            }
        }

        if (doReport)
        {
            if (status & NX_TRIGGER_ON_ENTER)
            {
                if (plSimulationMgr::fExtraProfile)
                    DetectorLogRed("-->Send Collision %s enter",triggerPhys->GetObjectKey()->GetName().c_str());
                plSimulationMgr::GetInstance()->AddCollisionMsg(triggerPhys->GetObjectKey(), otherKey, true);
            }
            else if (status & NX_TRIGGER_ON_LEAVE)
            {
                if (plSimulationMgr::fExtraProfile)
                    DetectorLogRed("-->Send Collision %s exit",triggerPhys->GetObjectKey()->GetName().c_str());
                plSimulationMgr::GetInstance()->AddCollisionMsg(triggerPhys->GetObjectKey(), otherKey, false);
            }
        }
    }
} gSensorReport;

// This gets called by PhysX whenever two actor groups that are set to report
// have a collision.  We enable this for when a dynamic collides with anything.
class ContactReport : public NxUserContactReport
{
    virtual void onContactNotify(NxContactPair& pair, NxU32 events)
    {
        plPXPhysical* phys1 = (plPXPhysical*)pair.actors[0]->userData;
        plPXPhysical* phys2 = (plPXPhysical*)pair.actors[1]->userData;

        // Normally, these are always valid because the avatar (who doesn't have
        // a physical) will push other physicals away before they actually touch
        // his actor.  However, if the avatar is warped to a new position he may
        // collide with the object for a few frames.  We just ignore it.
        if (!phys1 || !phys2)
            return;

        plSimulationMgr::GetInstance()->ConsiderSynch(phys1, phys2);

        if (phys1->GetSoundGroup() && phys2->GetSoundGroup())
        {
            hsPoint3 contactPoint(0, 0, 0);

            // Just grab the last contact point
            NxContactStreamIterator i(pair.stream);
            while (i.goNextPair())
            {
                while (i.goNextPatch())
                {
                    const NxVec3& contactNormal = i.getPatchNormal();
                    while (i.goNextPoint())
                    {
                        contactPoint = plPXConvert::Point(i.getPoint());
                    }
                }
            }

            plSimulationMgr::GetInstance()->fSoundMgr->AddContact(
                phys1, phys2, contactPoint,
                plPXConvert::Vector(pair.sumNormalForce));
        }
    }
} gContactReport;

// This directs any errors or warnings from PhysX to the simulation log.
class ErrorStream : public NxUserOutputStream
{
    virtual void reportError(NxErrorCode e, const char* message, const char* file, int line)
    {
        const char* errorType = nil;
        switch (e)
        {
        case NXE_INVALID_PARAMETER: errorType = "invalid parameter";    break;
        case NXE_INVALID_OPERATION: errorType = "invalid operation";    break;
        case NXE_OUT_OF_MEMORY:     errorType = "out of memory";        break;
        case NXE_DB_INFO:           errorType = "info";                 break;
        case NXE_DB_WARNING:        errorType = "warning";              break;
        default:                    errorType = "unknown error";
        }

        plSimulationMgr::Log("%s(%d) : %s: %s", file, line, errorType, message);
    }

    virtual NxAssertResponse reportAssertViolation(const char* message, const char* file, int line)
    {
        plSimulationMgr::Log("access violation : %s (%s(%d))", message, file, line);
        hsAssert(0, "PhysX assert, see simulation log for details");
        return NX_AR_CONTINUE;
    }

    virtual void print(const char* message)
    {
        plSimulationMgr::Log(message);
    }
} gErrorStream;


/////////////////////////////////////////////////////////////////
//
// DEFAULTS
//
/////////////////////////////////////////////////////////////////

#define kDefaultMaxDelta    (0.15)        // if the step is greater than .15 seconds, clamp to that
#define kDefaultStepSize    (1.f / 60.f)  // default simulation freqency is 60hz

/////////////////////////////////////////////////////////////////
//
// CONSTRUCTION, INITIALIZATION, DESTRUCTION
//
/////////////////////////////////////////////////////////////////

// 
// Alloc all the sim timers here so they make a nice pretty display
//
//plProfile_CreateTimer(    "ClearContacts", "Simulation", ClearContacts);
plProfile_CreateTimer(  "Step", "Simulation", Step);
// plProfile_CreateTimer(   "  Broadphase", "Simulation", Broadphase);
plProfile_CreateCounter("  Awake", "Simulation", Awake);
plProfile_CreateCounter("  Contacts", "Simulation", Contacts);
plProfile_CreateCounter("  DynActors", "Simulation", DynActors);
plProfile_CreateCounter("  DynShapes", "Simulation", DynShapes);
plProfile_CreateCounter("  StaticShapes", "Simulation", StaticShapes);
plProfile_CreateCounter("  Actors", "Simulation", Actors);
plProfile_CreateCounter("  PhyScenes", "Simulation", Scenes);

// plProfile_CreateCounter("  Broadphase Rejected", "Simulation", BroadphaseReject);
// plProfile_CreateCounter("  Broadphase Accepted", "Simulation", BroadphaseAccept);
// plProfile_CreateCounter("  Impact", "Simulation", Impact);
// plProfile_CreateCounter("  Penetration", "Simulation", Penetration);
// plProfile_CreateTimer(   "Narrowphase", "Simulation", Narrowphase);
// plProfile_CreateTimer(   "ProcessInterpenetration", "Simulation", ProcessInterpenetration);
plProfile_CreateTimer(  "LineOfSight", "Simulation", LineOfSight);
plProfile_CreateTimer(  "ProcessSyncs", "Simulation", ProcessSyncs);
plProfile_CreateTimer(  "UpdateContexts", "Simulation", UpdateContexts);
// plProfile_CreateCounter("  ContextUpdates", "Simulation", ContextUpdates);
plProfile_CreateCounter("  MaySendLocation", "Simulation", MaySendLocation);
plProfile_CreateCounter("  LocationsSent", "Simulation", LocationsSent);
plProfile_CreateTimer(  "  PhysicsUpdates","Simulation",PhysicsUpdates);
// plProfile_CreateTimer(   "EntityCleanup", "Simulation", EntityCleanup);
plProfile_CreateCounter("SetTransforms Accepted", "Simulation", SetTransforms);
plProfile_CreateCounter("AnimatedPhysicals", "Simulation", AnimatedPhysicals);
plProfile_CreateCounter("AnimatedActivators", "Simulation", AnimatedActivators);
plProfile_CreateCounter("Controllers", "Simulation", Controllers);
// plProfile_CreateCounter("NumSteps", "Simulation", NumSteps);
plProfile_CreateCounter("StepLength", "Simulation", StepLen);

// declared at file scope so that both GetInstance and the destructor can access it.
static plSimulationMgr* gTheInstance = NULL;
bool plSimulationMgr::fExtraProfile = false;
bool plSimulationMgr::fSubworldOptimization = false;
bool plSimulationMgr::fDoClampingOnStep=true;

void plSimulationMgr::Init()
{
    hsAssert(!gTheInstance, "Initializing the sim when it's already been done");
    gTheInstance = new plSimulationMgr();
    if (gTheInstance->InitSimulation())
        gTheInstance->RegisterAs(kSimulationMgr_KEY);
    else
    {
        // There was an error when creating the PhysX simulation
        // ...then get rid of the simulation instance
        delete gTheInstance; // clean up the memory we allocated
        gTheInstance = nil;
    }
}

// when the app is going away completely
void plSimulationMgr::Shutdown()
{
    hsAssert(gTheInstance, "Simulation manager missing during shutdown.");
    if (gTheInstance)
    {
        gTheInstance->UnRegisterAs(kSimulationMgr_KEY);     // this will destroy the instance
        gTheInstance = nil;
    }
}

plSimulationMgr* plSimulationMgr::GetInstance()
{
    return gTheInstance;
}

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

plSimulationMgr::plSimulationMgr()
    : fSuspended(true)
    , fAccumulator(0.0f)
    , fStepCount(0)
    , fLOSDispatch(new plLOSDispatch())
    , fSoundMgr(new plPhysicsSoundMgr)
    , fLog(nil)
{

}

bool plSimulationMgr::InitSimulation()
{
    fSDK = NxCreatePhysicsSDK(NX_PHYSICS_SDK_VERSION, NULL, &gErrorStream);
    if (!fSDK)
        return false; // client will handle this and ask user to install

    fLog = plStatusLogMgr::GetInstance().CreateStatusLog(40, "Simulation.log", plStatusLog::kFilledBackground | plStatusLog::kAlignToTop);
    fLog->AddLine("Initialized simulation mgr");

#ifndef PLASMA_EXTERNAL_RELEASE
    // If this is an internal build, enable the PhysX debugger
    fSDK->getFoundationSDK().getRemoteDebugger()->connect("localhost", 5425);
#endif

    return true;
}

plSimulationMgr::~plSimulationMgr()
{
    fLOSDispatch->UnRef();
    fLOSDispatch = nil;

    delete fSoundMgr;
    fSoundMgr = nil;

    hsAssert(fScenes.empty(), "Unreleased scenes at shutdown");

    if (fSDK)
        fSDK->release();

    delete fLog;
    fLog = nil;
}

NxScene* plSimulationMgr::GetScene(plKey world)
{
    if (!world)
        world = GetKey();

    NxScene* scene = fScenes[world];

    if (!scene)
    {
        NxSceneDesc sceneDesc;
        sceneDesc.gravity.set(0, 0, -32.174049f);
        sceneDesc.userTriggerReport = &gSensorReport;
        sceneDesc.userContactReport = &gContactReport;
        scene = fSDK->createScene(sceneDesc);

        // See "Advancing The Simulation State" in the PhysX SDK Documentation
        // This will cause PhysX to only update for our step size. If we call simulate
        // faster than that, PhysX will return immediately. If we call it slower than that,
        // PhysX will do some extra steps for us (isn't that nice?).
        // Anyway, this should be a good way to make us independent of the framerate.
        // If not, I blame the usual suspects (Tye, eap, etc...)
        scene->setTiming(kDefaultStepSize);

        // Most physicals use the default friction and restitution values, so we
        // make them the default.
        NxMaterial* mat = scene->getMaterialFromIndex(0);
        float rest = mat->getRestitution();
        float sfriction = mat->getStaticFriction();
        float dfriction = mat->getDynamicFriction();
        mat->setRestitution(0.5);
        mat->setStaticFriction(0.5);
        mat->setDynamicFriction(0.5);

        // By default we just leave all the collision groups enabled, since
        // PhysX already makes sure that things like statics and statics don't
        // collide.  However, we do make it so the avatar and dynamic blockers
        // only block avatars and dynamics.
        for (int i = 0; i < plSimDefs::kGroupMax; i++)
        {
            scene->setGroupCollisionFlag(i, plSimDefs::kGroupAvatarBlocker, false);
            scene->setGroupCollisionFlag(i, plSimDefs::kGroupDynamicBlocker, false);
            scene->setGroupCollisionFlag(i, plSimDefs::kGroupLOSOnly, false);
            scene->setGroupCollisionFlag(plSimDefs::kGroupLOSOnly, i, false);
            scene->setGroupCollisionFlag(i, plSimDefs::kGroupAvatarKinematic, false);
        }
        scene->setGroupCollisionFlag(plSimDefs::kGroupAvatar, plSimDefs::kGroupAvatar, false);
        scene->setGroupCollisionFlag(plSimDefs::kGroupAvatar, plSimDefs::kGroupAvatarBlocker, true);
        scene->setGroupCollisionFlag(plSimDefs::kGroupDynamic, plSimDefs::kGroupDynamicBlocker, true);
        scene->setGroupCollisionFlag(plSimDefs::kGroupAvatar, plSimDefs::kGroupStatic, true);
        scene->setGroupCollisionFlag(plSimDefs::kGroupStatic, plSimDefs::kGroupAvatar, true);
        scene->setGroupCollisionFlag(plSimDefs::kGroupAvatar, plSimDefs::kGroupDynamic, true);

        // Kinematically controlled avatars interact with detectors and dynamics
        scene->setGroupCollisionFlag(plSimDefs::kGroupAvatarKinematic, plSimDefs::kGroupDetector, true);
        scene->setGroupCollisionFlag(plSimDefs::kGroupAvatarKinematic, plSimDefs::kGroupDynamic, true);

        // The dynamics are in actor group 1, everything else is in 0.  Request
        // a callback for whenever a dynamic touches something.
        scene->setActorGroupPairFlags(0, 1, NX_NOTIFY_ON_TOUCH);
        scene->setActorGroupPairFlags(1, 1, NX_NOTIFY_ON_TOUCH);

        fScenes[world] = scene;
    }

    return scene;
}

void plSimulationMgr::ReleaseScene(plKey world)
{
    if (!world)
        world = GetKey();

    SceneMap::iterator it = fScenes.find(world);
    hsAssert(it != fScenes.end(), "Unknown scene");
    if (it != fScenes.end())
    {
        NxScene* scene = it->second;
        if (scene->getNbActors() == 0)
        {
            fSDK->releaseScene(*scene);
            fScenes.erase(it);
        }
    }
}

void plSimulationMgr::AddCollisionMsg(plKey hitee, plKey hitter, bool enter)
{
    // First, make sure we have no dupes
    for (CollisionVec::iterator it = fCollideMsgs.begin(); it != fCollideMsgs.end(); ++it)
    {
        plCollideMsg* pMsg = *it;

        // Should only ever be one receiver.
        // Oh, it seems we should update the hit status. The latest might be different than the older...
        // Even in the same frame >.<
        if (pMsg->fOtherKey == hitter && pMsg->GetReceiver(0) == hitee)
        {
            pMsg->fEntering = enter;
            DetectorLogRed("DUPLICATE COLLISION: %s hit %s",
                (hitter ? hitter->GetName().c_str() : "(nil)"),
                (hitee ? hitee->GetName().c_str() : "(nil)"));
            return;
        }
    }

    // Still here? Then this must be a unique hit!
    plCollideMsg* pMsg = new plCollideMsg;
    pMsg->AddReceiver(hitee);
    pMsg->fOtherKey = hitter;
    pMsg->fEntering = enter;
    fCollideMsgs.push_back(pMsg);
}
void plSimulationMgr::AddCollisionMsg(plCollideMsg* msg)
{
    fCollideMsgs.push_back(msg);
}

void plSimulationMgr::Advance(float delSecs)
{
    if (fSuspended)
        return;

    fAccumulator += delSecs;
    if (fAccumulator < kDefaultStepSize)
    {
        // Not enough time has passed to perform a substep.
        plPXPhysicalControllerCore::UpdateNonPhysical(fAccumulator / kDefaultStepSize);
        return;
    }
    else if (fAccumulator > kDefaultMaxDelta)
    {
        if (fExtraProfile)
            Log("Step clamped from %f to limit of %f", fAccumulator, kDefaultMaxDelta);
        fAccumulator = kDefaultMaxDelta;
    }

    ++fStepCount;

    // Perform as many whole substeps as possible saving the remainder in our accumulator.
    int numSubSteps = (int)(fAccumulator / kDefaultStepSize + 0.000001f);
    float delta = numSubSteps * kDefaultStepSize;
    fAccumulator -= delta;

    plProfile_IncCount(StepLen, (int)(delta*1000));
    plProfile_BeginTiming(Step);

    plPXPhysicalControllerCore::Apply(delta);
    
    for (SceneMap::iterator it = fScenes.begin(); it != fScenes.end(); it++)
    {
        NxScene* scene = it->second;
        bool do_advance = true;
        if (fSubworldOptimization)
        {
            plKey world = (plKey)it->first;
            if (world == GetKey())
                world = nil;
            do_advance = plPXPhysicalControllerCore::AnyControllersInThisWorld(world);
        }
        if (do_advance)
        {
            scene->simulate(delta);
            scene->flushStream();
            scene->fetchResults(NX_RIGID_BODY_FINISHED, true);
        }
    }

    plPXPhysicalControllerCore::Update(numSubSteps, fAccumulator / kDefaultStepSize);

    plProfile_EndTiming(Step);
#ifndef PLASMA_EXTERNAL_RELEASE
    if(plSimulationMgr::fDisplayAwakeActors)IDrawActiveActorList();
#endif 
    if (fExtraProfile)
    {
        int contacts = 0, dynActors = 0, dynShapes = 0, awake = 0, stShapes=0, actors=0, scenes=0, controllers=0 ;
        for (SceneMap::iterator it = fScenes.begin(); it != fScenes.end(); it++)
        {
            bool do_advance = true;
            if (fSubworldOptimization)
            {
                plKey world = (plKey)it->first;
                if (world == GetKey())
                    world = nil;
                do_advance = plPXPhysicalControllerCore::AnyControllersInThisWorld(world);
            }
            if (do_advance)
            {
                NxScene* scene = it->second;
                NxSceneStats stats;
                scene->getStats(stats);

                contacts += stats.numContacts;
                dynActors += stats.numDynamicActors;
                dynShapes += stats.numDynamicShapes;
                awake += stats.numDynamicActorsInAwakeGroups;
                stShapes += stats.numStaticShapes;
                actors += stats.numActors;
                scenes += 1;
                controllers += plPXPhysicalControllerCore::NumControllers();
            }
        }

        plProfile_IncCount(Awake, awake);
        plProfile_IncCount(Contacts, contacts);
        plProfile_IncCount(DynActors, dynActors);
        plProfile_IncCount(DynShapes, dynShapes);
        plProfile_IncCount(StaticShapes, stShapes);
        plProfile_IncCount(Actors, actors);
        plProfile_IncCount(Scenes, scenes);
        plProfile_IncCount(Controllers, controllers);
    }

    plProfile_IncCount(AnimatedPhysicals, plPXPhysical::fNumberAnimatedPhysicals);
    plProfile_IncCount(AnimatedActivators, plPXPhysical::fNumberAnimatedActivators);

    fSoundMgr->Update();

    plProfile_BeginTiming(ProcessSyncs);
    IProcessSynchs();
    plProfile_EndTiming(ProcessSyncs);

    plProfile_BeginTiming(UpdateContexts);
    ISendUpdates();
    plProfile_EndTiming(UpdateContexts);
}

void plSimulationMgr::ISendUpdates()
{
    for (CollisionVec::iterator it = fCollideMsgs.begin(); it != fCollideMsgs.end(); ++it)
    {
        plCollideMsg* pMsg = *it;
        DetectorLogYellow("Collision: %s was triggered by %s. Sending an %s msg", pMsg->GetReceiver(0)->GetName().c_str(),
                          pMsg->fOtherKey ? pMsg->fOtherKey->GetName().c_str() : "(nil)" , pMsg->fEntering ? "'enter'" : "'exit'");
        plgDispatch::Dispatch()->MsgSend(pMsg);
    }
    fCollideMsgs.clear();

    SceneMap::iterator it = fScenes.begin();
    for (; it != fScenes.end(); it++)
    {
        NxScene* scene = it->second;
        uint32_t numActors = scene->getNbActors();
        NxActor** actors = scene->getActors();

        for (int i = 0; i < numActors; i++)
        {
            plPXPhysical* physical = (plPXPhysical*)actors[i]->userData;
            if (physical)
            {
                if (physical->GetSceneNode())
                {
                    physical->SendNewLocation();
                }
                else
                {
                    // if there's no scene node, it's not active (probably about to be collected)
                    const plKey physKey = physical->GetKey();
                    if (physKey)
                    {
                        const plString &physName = physical->GetKeyName();
                        if (!physName.IsNull())
                        {
                            plSimulationMgr::Log("Removing physical <%s> because of missing scene node.\n", physName.c_str());
                        }
                    }
//                  Remove(physical);
                }
            }
        }

//      // iterate through the db types, which are powers-of-two enums.
//      for( plLOSDB db = static_cast<plLOSDB>(1) ;
//          db < plSimDefs::kLOSDBMax;
//          db = static_cast<plLOSDB>(db << 1) )
//      {
//          fLOSSolvers[db]->Resolve(fSubspace);
//      }
//      if(fNeedLOSCullPhase)
//      {
//          for( plLOSDB db = static_cast<plLOSDB>(1) ;
//              db < plSimDefs::kLOSDBMax;
//              db = static_cast<plLOSDB>(db << 1) )
//          {
//              fLOSSolvers[db]->Resolve(fSubspace);
//          }
//          fNeedLOSCullPhase = false;
//      }
    }
}

/////////////////////////////////////////////////////////////////
//
//  RESOLUTION & TIMEOUT PARAMETERS
//
/////////////////////////////////////////////////////////////////

int plSimulationMgr::GetMaterialIdx(NxScene* scene, float friction, float restitution)
{
    if (friction == 0.5f && restitution == 0.5f)
        return 0;

    // Use the nutty PhysX method to search for a matching material
    #define kNumMatsPerCall 32
    NxMaterial* materials[kNumMatsPerCall];
    NxU32 iterator = 0;
    bool getMore = true;
    while (getMore)
    {
        int numMats = scene->getMaterialArray(materials, kNumMatsPerCall, iterator);

        for (int i = 0; i < numMats; i++)
        {
            if (materials[i]->getDynamicFriction() == friction &&
                materials[i]->getRestitution() == restitution)
            {
                return materials[i]->getMaterialIndex();
            }
        }

        getMore = (numMats == kNumMatsPerCall);
    }

    // Couldn't find the material, so create it
    NxMaterialDesc desc;
    desc.restitution = restitution;
    desc.dynamicFriction = friction;
    desc.staticFriction = friction;
    NxMaterial* mat = scene->createMaterial(desc);
    if (mat)
        return mat->getMaterialIndex();
    else
        return NULL;
}

/////////////////////////////////////////////////////////////////
//
//  SYNCHRONIZATION
//  Very much a work in progress.
//  *** would like to synchronize interacting groups as an atomic unit
//  *** need a "morphing synch" that incrementally approaches the target
//
/////////////////////////////////////////////////////////////////

const double plSimulationMgr::SynchRequest::kDefaultTime = -1000.0;

void plSimulationMgr::ConsiderSynch(plPXPhysical* physical, plPXPhysical* other)
{
    if (physical->GetProperty(plSimulationInterface::kNoSynchronize) &&
        (!other || other->GetProperty(plSimulationInterface::kNoSynchronize)))
        return;

    // We only need to sync if a dynamic is colliding with something.
    // Set it up so the dynamic is in 'physical'
    if (other && other->GetGroup() == plSimDefs::kGroupDynamic)
    {
        plPXPhysical* temp = physical;
        physical = other;
        other = temp;
    }
    // Neither is dynamic, so we can exit now
    else if (physical->GetGroup() != plSimDefs::kGroupDynamic)
        return;

    bool syncPhys = !physical->GetProperty(plSimulationInterface::kNoSynchronize) &&
                    physical->IsDynamic() &&
                    physical->IsLocallyOwned();
    bool syncOther = other &&
                    !other->GetProperty(plSimulationInterface::kNoSynchronize) &&
                    other->IsDynamic() != 0.f &&
                    other->IsLocallyOwned();

    if (syncPhys)
    {
        double timeNow = hsTimer::GetSysSeconds();
        double timeElapsed = timeNow - physical->GetLastSyncTime();

        // If both objects are capable of syncing, we want to do it at the same
        // time, so no interpenetration issues pop up on other clients
        if (syncOther)
            timeElapsed = std::max(timeElapsed, timeNow - other->GetLastSyncTime());

        // Set the sync time to 1 second from the last sync
        double syncTime = 0.0;
        if (timeElapsed > 1.0)
            syncTime = hsTimer::GetSysSeconds();
        else
            syncTime = hsTimer::GetSysSeconds() + (1.0 - timeElapsed);

        // This line will create and insert the request if it's not there already.
        SynchRequest& physReq = fPendingSynchs[physical];
        if (physReq.fTime == SynchRequest::kDefaultTime)
            physReq.fKey = physical->GetKey();
        physReq.fTime = syncTime;

        if (syncOther)
        {
            SynchRequest& otherReq = fPendingSynchs[other];
            if (otherReq.fTime == SynchRequest::kDefaultTime)
                otherReq.fKey = other->GetKey();
            otherReq.fTime = syncTime;
        }
    }
}

void plSimulationMgr::IProcessSynchs()
{
    double time = hsTimer::GetSysSeconds();

    PhysSynchMap::iterator i = fPendingSynchs.begin();

    while (i != fPendingSynchs.end())
    {
        SynchRequest req = (*i).second;
        if (req.fKey->ObjectIsLoaded())
        {
            plPXPhysical* phys = (*i).first;
            bool timesUp = (time >= req.fTime);
            bool allQuiet = false;//phys->GetActo GetBody()->isActive() == false;

            if (timesUp || allQuiet)
            {
                phys->DirtySynchState(kSDLPhysical, plSynchedObject::kBCastToClients);
                i = fPendingSynchs.erase(i);
            }
            else
            {
                i++;
            }
        }
        else
        {
            i = fPendingSynchs.erase(i);
        }
    }
}

void plSimulationMgr::Log(const char * fmt, ...)
{
    if(gTheInstance)
    {
        plStatusLog* log = GetInstance()->fLog;
        if(log)
        {
            va_list args;
            va_start(args, fmt);
            log->AddLineV(fmt, args);
            va_end(args);
        }
    }
}

void plSimulationMgr::LogV(const char* formatStr, va_list args)
{
    if(gTheInstance)
    {
        plStatusLog * log = GetInstance()->fLog;
        if(log)
        {
            log->AddLineV(formatStr, args);
        }
    }
}

void plSimulationMgr::ClearLog()
{
    if(gTheInstance)
    {
        plStatusLog *log = GetInstance()->fLog;
        if(log)
        {
            log->Clear();
        }
    }
}
#ifndef PLASMA_EXTERNAL_RELEASE

void plSimulationMgr::IDrawActiveActorList()
{
    plDebugText     &debugTxt = plDebugText::Instance();
    char            strBuf[ 2048 ];
    int             lineHeight = debugTxt.GetFontSize() + 4;
    uint32_t          scrnWidth, scrnHeight;

    debugTxt.GetScreenSize( &scrnWidth, &scrnHeight );
    int y = 10;
    int x = 10;

    sprintf(strBuf, "Number of scenes: %d", fScenes.size());
    debugTxt.DrawString(x, y, strBuf);
    y += lineHeight;
    int sceneNumber=1;
    for (SceneMap::iterator it = fScenes.begin(); it != fScenes.end(); it++)
    {
        
        sprintf(strBuf, "Scene: %s",it->first->GetName().c_str());
        debugTxt.DrawString(x, y, strBuf);
        y += lineHeight;
        uint32_t numActors =it->second->getNbActors();
        NxActor** actors =it->second->getActors();
        for(uint32_t i=0;i<numActors;i++)
        {
            if(!actors[i]->isSleeping())
            {
                sprintf(strBuf,"\t%s",actors[i]->getName());
                debugTxt.DrawString(x, y, strBuf);
                y += lineHeight;
            }
        }
        sceneNumber++;
    }
}
#endif //PLASMA_EXTERNAL_RELEASE