CWE-ou-minkata/Sources/Plasma/FeatureLib/pfCamera/plCameraBrain.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 "HeadSpin.h"
#include <cmath>

#include "plCameraBrain.h"
#include "hsTimer.h"
#include "hsResMgr.h"
#include "plRefFlags.h"
#include "plCameraModifier.h"
#include "plVirtualCamNeu.h"
#include "plgDispatch.h"
#include "plInterp/plController.h"
#include "pnSceneObject/plSceneObject.h"
#include "pnSceneObject/plCoordinateInterface.h"
#include "pnSceneObject/plSimulationInterface.h"
#include "pnSceneObject/plDrawInterface.h"
#include "plScene/plSceneNode.h"
#include "pnMessage/plCameraMsg.h"
#include "pnMessage/plPlayerPageMsg.h"
#include "pnMessage/plEnableMsg.h"
#include "pnMessage/plTimeMsg.h"
#include "plMessage/plInputEventMsg.h"
#include "plMessage/plLOSRequestMsg.h"
#include "plMessage/plLOSHitMsg.h"
#include "plMessage/plAvatarMsg.h"
#include "pnKeyedObject/plKey.h"
#include "plInputCore/plInputDevice.h"
#include "plInputCore/plInputManager.h"
#include "pnNetCommon/plNetApp.h"
#include "pfAnimation/plLineFollowMod.h"
#include "plAvatar/plAvatarMgr.h"
#include "plAvatar/plArmatureMod.h"
#include "plAvatar/plAvBrainHuman.h"
#include "plNetClient/plNetClientMgr.h"

bool plCameraBrain1_FirstPerson::fDontFade = false;
float plCameraBrain1::fFallAccel         = 20.0f;
float plCameraBrain1::fFallDecel         = 5.0f;
float plCameraBrain1::fFallVelocity      = 50.0f;
float plCameraBrain1::fFallPOAAccel      = 10.0f;
float plCameraBrain1::fFallPOADecel      = 10.0f;
float plCameraBrain1::fFallPOAVelocity   = 50.0f;

// basic camera brain now is a fixed brain by default.
// if it doesn't have a subject (an object) it will just look straight ahead.
// if there's a subject it will follow it.

// the avatar and drive cameras are subclasses of the basic brain.

plCameraBrain1::plCameraBrain1() :
fCurCamSpeed(0.0f),
fCurViewSpeed(0.0f),
fVelocity(30.0f),
fAccel(30.0f),
fDecel(30.0f),  
fPOAVelocity(30.0f),
fPOAAccel(30.0f),
fPOADecel(30.0f),
fSubjectKey(nil),
fRail(nil),
fXPanLimit(0.0f),
fZPanLimit(0.0f),
fPanSpeed(0.5f),
fZoomMin(0.0f),
fZoomMax(0.0f),
fZoomRate(0.0f),
fOffsetLength(0.0f),
fOffsetPct(1.0f)
{
}

plCameraBrain1::plCameraBrain1(plCameraModifier1* pMod) :
fCurCamSpeed(0.0f),
fCurViewSpeed(0.0f),
fVelocity(30.0f),
fAccel(30.0f),
fDecel(30.0f),  
fPOAVelocity(30.0f),
fPOAAccel(30.0f),
fPOADecel(30.0f),
fSubjectKey(nil),
fRail(nil),
fXPanLimit(0.0f),
fZPanLimit(0.0f),
fZoomMin(0.0f),
fZoomMax(0.0f),
fZoomRate(0.0f),
fOffsetLength(0.0f),
fOffsetPct(1.0f)
{
    fCamera = pMod;
    pMod->SetBrain(this);
    fPOAGoal.Set(0,0,0);
    fGoal.Set(1,1,1);
    fPOAOffset.Set(0,0,0);
    hsVector3 up(0, 0, 1);
    fTargetMatrix.Make(&fGoal, &fPOAGoal, &up);
    fFlags.Clear();
}

plCameraBrain1::~plCameraBrain1()
{
}

void plCameraBrain1::AddTarget()
{
    fTargetMatrix = fCamera->GetTarget()->GetCoordinateInterface()->GetLocalToWorld();
    hsVector3 view;
    fTargetMatrix.GetAxis(0, &view, 0);
    fGoal = fTargetMatrix.GetTranslate();
    fPOAGoal = fGoal - view;
    fCamera->SetTargetPos(fGoal);
    fCamera->SetTargetPOA(fPOAGoal);
}

// called when we are pushed on top of the camera stack (or re-activated by another popping off directly above)
void plCameraBrain1::Push(bool recenter)
{
    if (fFlags.IsBitSet(kRailComponent))
    {
        fRail->Init();
    }
    if (recenter)
        plInputManager::SetRecenterMouse(false);
    fOffsetPct = 1.0f;
    // force update once to pop into position before we render
    SetFlags(kCutPOAOnce);
    SetFlags(kCutPosOnce);
    Update(true);
    
}

// called when we pop off the camera stack - only if we are the current camera
void plCameraBrain1::Pop()
{
    ClearMovementFlag(S_SET_FREELOOK);
}

// set the goal to which we want to animate the fov
void plCameraBrain1::SetFOVGoal(float w, float h, double t)
{ 
    if (fFOVhGoal == h || h == fCamera->GetFOVh() &&
        fFOVwGoal == w || w == fCamera->GetFOVw())
        return;

    float dif = h - fCamera->GetFOVh();
    fFOVhAnimRate = dif / ((float)t);

    fFOVhGoal = h; 
    fFOVStartTime = hsTimer::GetSysSeconds();
    fFOVEndTime = fFOVStartTime + t; 

    if (w == 0.f)
    {
        fFOVwGoal = IMakeFOVwZoom(h);
        dif = fFOVwGoal - fCamera->GetFOVw();
        fFOVwAnimRate = dif / ((float)t);
    }
    else
    {
        dif = w - fCamera->GetFOVw();
        fFOVwAnimRate = dif / ((float)t);
        fFOVwGoal = w;
    }

    fFlags.SetBit(kAnimateFOV); 
}

// set parameters for how this camera zooms FOV based on user input (mostly for telescopes)
void plCameraBrain1::SetZoomParams(float max, float min, float rate)
{
    fZoomRate = rate;
    fZoomMax = max;
    fZoomMin = min;
    fFlags.SetBit(kZoomEnabled);
}


// periodic update - forced means we are forcing an update at a non-normal time to "prime" the camera 
// into position before it renders the first time (hence the fake 10 second frame delta)
void plCameraBrain1::Update(bool forced)
{
    double secs = hsTimer::GetDelSysSeconds();
    if (forced)
        secs = 10.0f;
    // is there a subject we are following?
    if (GetSubject())
    {
        fTargetMatrix = fCamera->GetTarget()->GetCoordinateInterface()->GetLocalToWorld();
        fGoal = fTargetMatrix.GetTranslate();
        fPOAGoal = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
        fPOAGoal += fPOAOffset;
    }
    else
    {   
        // get view based on current orientation (we could be animated)
        if (fCamera->GetTarget())
        {
            fTargetMatrix = fCamera->GetTarget()->GetCoordinateInterface()->GetLocalToWorld();
            hsVector3 view;
            fTargetMatrix.GetAxis(0, &view, 0);
            fGoal = fTargetMatrix.GetTranslate();
            fPOAGoal = fGoal - (view * 10);
        }
    }
    AdjustForInput(secs);

    IMoveTowardGoal(secs);
    IPointTowardGoal(secs);
    if (fFlags.IsBitSet(kAnimateFOV))
        IAnimateFOV(secs);
        
}

// adjust FOV based on elapsed time
void plCameraBrain1::IAnimateFOV(double time)
{
    float dH = fFOVhAnimRate * hsTimer::GetDelSysSeconds();
    float dW = fFOVwAnimRate * hsTimer::GetDelSysSeconds();
    dH += fCamera->GetFOVh();
    dW += fCamera->GetFOVw();

    if ( (fFOVhAnimRate < 0.0f && dH <= fFOVhGoal) ||
         (fFOVhAnimRate > 0.0f && dH >= fFOVhGoal)  )
    {
        dH = fFOVhGoal;
    }
    if ( (fFOVwAnimRate < 0.0f && dW <= fFOVwGoal) ||
         (fFOVwAnimRate > 0.0f && dW >= fFOVwGoal)  )
    {
        dW = fFOVwGoal;
    }

    if (dW == fFOVwGoal && dH == fFOVhGoal)
        fFlags.ClearBit(kAnimateFOV);
    fCamera->SetFOV( dW, dH );
}

// move the camera's origin point (not where it is looking) toward where it is going
void plCameraBrain1::IMoveTowardGoal(double elapsedTime)
{
    bool current = plVirtualCam1::Instance()->IsCurrentCamera(GetCamera());

    if (fFlags.IsBitSet(kCutPos) || fFlags.IsBitSet(kNonPhys) || !current)
    {
        fCamera->SetTargetPos(fGoal);
        return;
    }

    if (fFlags.IsBitSet(kCutPosOnce))
    {
        fCamera->SetTargetPos(fGoal);
        fFlags.ClearBit(kCutPosOnce);
        return;
    }
    hsVector3 dir(fGoal - fCamera->GetTargetPos());
    float distToGoal=dir.Magnitude();
    
    //smooth out stoppage...
    float adjMaxVel = fVelocity;
    if (distToGoal <= 5.0f && distToGoal > 0.1f)
    {
        float mult = (distToGoal - 5.0f)*0.1f;
        adjMaxVel = fVelocity - hsABS(fVelocity*mult);
    }


    if (distToGoal > 0.0f)
        dir.Normalize();

    hsVector3 vel( dir * fCurCamSpeed );
    
    if (fFlags.IsBitSet(kFalling))
        IAdjustVelocity(plCameraBrain1::fFallAccel, plCameraBrain1::fFallDecel, &dir, &vel, plCameraBrain1::fFallVelocity, distToGoal, elapsedTime);
    else
    if (plVirtualCam1::Instance()->fUseAccelOverride)
        IAdjustVelocity(plVirtualCam1::Instance()->fAccel, plVirtualCam1::Instance()->fDecel, &dir, &vel, plVirtualCam1::Instance()->fVel, distToGoal, elapsedTime);
    else
    if (fFlags.IsBitSet(kPanicVelocity))
        IAdjustVelocity(fAccel, fDecel, &dir, &vel, 1000.0f, distToGoal, elapsedTime);
    else
    if (fFlags.IsBitSet(kRunning) && fVelocity < 16.0f) // speed up when we run if necessary
        IAdjustVelocity(fAccel, fDecel, &dir, &vel, 16.0f, distToGoal, elapsedTime);
    else
        IAdjustVelocity(fAccel, fDecel, &dir, &vel, adjMaxVel, distToGoal, elapsedTime);
        
    fCurCamSpeed = vel.Magnitude();

    float distMoved;
    if (fFlags.IsBitSet(kPanicVelocity))
        distMoved = IClampVelocity(&vel, 1000.0f, elapsedTime);
    else
    if (fFlags.IsBitSet(kFalling))
        distMoved = IClampVelocity(&vel, plCameraBrain1::fFallVelocity, elapsedTime);
    else
    if (fFlags.IsBitSet(kRunning) && fVelocity < 16.0f)
        distMoved = IClampVelocity(&vel, 16.0f, elapsedTime);
    else
        distMoved = IClampVelocity(&vel, fVelocity, elapsedTime);

    // compute final pos
    if (distMoved > distToGoal)
        fCamera->SetTargetPos(fGoal);
    else
        fCamera->SetTargetPos(fCamera->GetTargetPos() + vel);

}

void plCameraBrain1::SetMovementFlag(int f)
{ 
    fMoveFlags.SetBit(f); 
}


void plCameraBrain1::IPointTowardGoal(double elapsedTime)
{
    bool current = plVirtualCam1::Instance()->IsCurrentCamera(GetCamera());
    
    if (fFlags.IsBitSet(kCutPOA) || fFlags.IsBitSet(kNonPhys) || !current)
    {
        fCamera->SetTargetPOA(fPOAGoal);
        return;
    }
    if (fFlags.IsBitSet(kCutPOAOnce))
    {
        fCamera->SetTargetPOA(fPOAGoal);
        fFlags.ClearBit(kCutPOAOnce);
        return;
    }


    hsVector3 dir(fPOAGoal - fCamera->GetTargetPOA());
    float distToGoal=dir.Magnitude();
    
    if (distToGoal > 0.0f)
        dir.Normalize();

    // smooth out stoppage
    float adjMaxVel = fPOAVelocity;
    if (distToGoal <= 5.0f && distToGoal > 0.1f)
    {   
        float mult = (distToGoal - 5.0f)*0.1f;
        adjMaxVel = fPOAVelocity - hsABS(fPOAVelocity*mult);
    }   
    

    hsVector3 vel( dir * fCurViewSpeed );
    
    if (fFlags.IsBitSet(kFalling))
        IAdjustVelocity(plCameraBrain1::fFallPOAAccel, plCameraBrain1::fFallPOADecel, &dir, &vel, plCameraBrain1::fFallPOAVelocity, distToGoal, elapsedTime);
    else
    if (plVirtualCam1::Instance()->fUseAccelOverride)
        IAdjustVelocity(plVirtualCam1::Instance()->fAccel, plVirtualCam1::Instance()->fDecel, &dir, &vel, plVirtualCam1::Instance()->fVel, distToGoal, elapsedTime);
    else
    if (fFlags.IsBitSet(kPanicVelocity))
        IAdjustVelocity(fPOAAccel, fPOADecel, &dir, &vel, 1000.0f, distToGoal, elapsedTime);
    else
    if (fFlags.IsBitSet(kRunning) && fPOAVelocity < 16.0f)
        IAdjustVelocity(fPOAAccel, fPOADecel, &dir, &vel,  16.0f, distToGoal, elapsedTime);
    else
        IAdjustVelocity(fPOAAccel, fPOADecel, &dir, &vel,  adjMaxVel, distToGoal, elapsedTime);
    
    fCurViewSpeed = vel.Magnitude();
    
    float distMoved;
    if (fFlags.IsBitSet(kPanicVelocity))
        distMoved = IClampVelocity(&vel, 1000.0f, elapsedTime);
    else
    if (fFlags.IsBitSet(kFalling))
        distMoved = IClampVelocity(&vel, plCameraBrain1::fFallPOAVelocity, elapsedTime);
    else
    if (fFlags.IsBitSet(kRunning) && fPOAVelocity < 16.0f)
        distMoved = IClampVelocity(&vel, 16.0f, elapsedTime);
    else
        distMoved = IClampVelocity(&vel, fPOAVelocity, elapsedTime);

    // compute final pos
    if (distMoved > distToGoal)
        fCamera->SetTargetPOA(fPOAGoal);
    else
        fCamera->SetTargetPOA(fCamera->GetTargetPOA() + vel);
}


void plCameraBrain1::IAdjustVelocity(float adjAccelRate, float adjDecelRate, 
                                       hsVector3* dir, hsVector3* vel, float maxSpeed, 
                                       float distToGoal, double elapsedTime)
{
    float speed = vel->Magnitude();      // save current speed
    *vel = *dir * speed;                    // change vel to correct dir

    // compute accel/decel
    float finalAccelRate;

    if (IShouldDecelerate(adjDecelRate, speed, distToGoal))
    {
        finalAccelRate = -adjDecelRate;
    }
    else
    {
        finalAccelRate = adjAccelRate;
    }

    if (finalAccelRate  != 0)
    {
        // compute accel vector in the direction of the goal
        hsVector3 accelVec = *dir * finalAccelRate;
        accelVec = accelVec * (float)elapsedTime;

        // add acceleration to velocity
        *vel = *vel + accelVec;
    }
    else
    {
        *vel = *dir * maxSpeed;
    }
}

float plCameraBrain1::IClampVelocity(hsVector3* vel, float maxSpeed, double elapsedTime)
{
    *vel = *vel * (float)elapsedTime;
    maxSpeed *= (float)elapsedTime;

    // clamp speed  (clamp if going negative?)
    float distMoved = vel->Magnitude();
    if (distMoved > maxSpeed)
    {
        vel->Normalize();
        *vel = *vel * maxSpeed;
        return maxSpeed;
    }
    return distMoved;
}

bool plCameraBrain1::IShouldDecelerate(float decelSpeed, float curSpeed, float distToGoal)
{
    if (decelSpeed == 0)
        // no deceleration
        return false;

    // compute distance required to stop, given decel speed (in units/sec sq)
    float stopTime = curSpeed / decelSpeed;      
    float avgSpeed = curSpeed * .5f;
    float stopDist = avgSpeed * stopTime;

    return (hsABS(distToGoal) <= hsABS(stopDist));  // stopDist+avgSpeed?   
}

//
// Make adjustments to camera position based on 
// user input - NOTE this is for mouse-cursor based adjustment
//
void plCameraBrain1::AdjustForInput(double secs)
{
    // move closer to camera target based on user input
    if (fOffsetPct < 1.0f)
    {
        hsVector3 v(fPOAGoal - fGoal);
        float len = v.Magnitude();
        len = len - (len * fOffsetPct);
        v.Normalize();
        fGoal = fGoal + (v * len);
    }
}

void plCameraBrain1::Read(hsStream* stream, hsResMgr* mgr)
{
    hsKeyedObject::Read(stream, mgr);
    fPOAOffset.Read(stream);
    plGenRefMsg* msg = new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kSubject ); // SceneObject
    mgr->ReadKeyNotifyMe( stream, msg, plRefFlags::kActiveRef );
    
    plGenRefMsg* msg2 = new plGenRefMsg( GetKey(), plRefMsg::kOnRequest, 0, kRailComponent ); // SceneObject
    mgr->ReadKeyNotifyMe( stream, msg2, plRefFlags::kActiveRef );

    fFlags.Read(stream);

    if (fFlags.IsBitSet(kFollowLocalAvatar))
    {
        if (plNetClientApp::GetInstance() && plNetClientApp::GetInstance()->GetLocalPlayer())
            SetSubject((plSceneObject*)plNetClientApp::GetInstance()->GetLocalPlayer());
            
        plgDispatch::Dispatch()->RegisterForExactType(plPlayerPageMsg::Index(), GetKey());
    }
    fAccel = stream->ReadLEFloat();
    fDecel = stream->ReadLEFloat();
    fVelocity = stream->ReadLEFloat();
    fPOAAccel = stream->ReadLEFloat();
    fPOADecel = stream->ReadLEFloat();
    fPOAVelocity = stream->ReadLEFloat();
    fXPanLimit = stream->ReadLEFloat();
    fZPanLimit = stream->ReadLEFloat();
    fZoomRate = stream->ReadLEFloat();
    fZoomMin = stream->ReadLEFloat();
    fZoomMax = stream->ReadLEFloat();

}

void plCameraBrain1::Write(hsStream* stream, hsResMgr* mgr)
{
    hsKeyedObject::Write(stream, mgr);
    fPOAOffset.Write(stream);
    mgr->WriteKey(stream, GetSubject());
    mgr->WriteKey(stream, fRail);
    fFlags.Write(stream);
    stream->WriteLEFloat(fAccel);
    stream->WriteLEFloat(fDecel);
    stream->WriteLEFloat(fVelocity);
    stream->WriteLEFloat(fPOAAccel);
    stream->WriteLEFloat(fPOADecel);
    stream->WriteLEFloat(fPOAVelocity);
    stream->WriteLEFloat(fXPanLimit);
    stream->WriteLEFloat(fZPanLimit);
    stream->WriteLEFloat(fZoomRate);
    stream->WriteLEFloat(fZoomMin);
    stream->WriteLEFloat(fZoomMax);
}

float plCameraBrain1::IMakeFOVwZoom(float fovH) const
{
    float num = tan(hsDegreesToRadians(fovH / 2)) * tan(hsDegreesToRadians(fCamera->GetFOVw() / 2));
    float denom = tan(hsDegreesToRadians(fCamera->GetFOVh() / 2));
    return 2 * hsABS(hsRadiansToDegrees(atan(num / denom)));
}

bool plCameraBrain1::MsgReceive(plMessage* msg)
{
    plCameraMsg* pCamMsg = plCameraMsg::ConvertNoRef(msg);
    if (pCamMsg)
    {
        if (pCamMsg->Cmd(plCameraMsg::kStartZoomIn))
        {
            fFlags.SetBit(kAnimateFOV);
            fFOVhGoal = fZoomMin;
            fFOVwGoal = IMakeFOVwZoom(fZoomMin);
            fFOVwAnimRate = fFOVhAnimRate = -1*fZoomRate;
            return true;
        }
        else
        if (pCamMsg->Cmd(plCameraMsg::kStartZoomOut))
        {
            fFlags.SetBit(kAnimateFOV);
            fFOVhGoal = fZoomMax;
            fFOVwGoal = IMakeFOVwZoom(fZoomMax);
            fFOVwAnimRate = fFOVhAnimRate = fZoomRate;
            return true;
        }
        else
        if (pCamMsg->Cmd(plCameraMsg::kStopZoom))
        {
            fFlags.ClearBit(kAnimateFOV);
            return true;
        }
        else
        if (pCamMsg->Cmd(plCameraMsg::kNonPhysOn))
        {
            fFlags.SetBit(kNonPhys);
            return true;
        }
        else
        if (pCamMsg->Cmd(plCameraMsg::kNonPhysOff))
        {
            fFlags.ClearBit(kNonPhys);
            return true;
        }
    }
    plGenRefMsg* pRefMsg = plGenRefMsg::ConvertNoRef(msg);
    if (pRefMsg)
    {
        if (pRefMsg->fType == kSubject)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
                SetSubject((plSceneObject*)pRefMsg->GetRef());
            else
                SetSubject(nil);
            return true;
        }
        else
        if (pRefMsg->fType == kRailComponent)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
            {
                fFlags.SetBit(kRailComponent);
                fRail = (plRailCameraMod*)pRefMsg->GetRef();
            }
            else
            {
                fRail = nil;
                fFlags.ClearBit(kRailComponent);
            }
            return true;
        }
    }
    plPlayerPageMsg* pPMsg = plPlayerPageMsg::ConvertNoRef(msg);
    if (pPMsg)
    {
        if (pPMsg->fPlayer == plNetClientMgr::GetInstance()->GetLocalPlayerKey())
        {
            if (pPMsg->fUnload)
            {
                if (fFlags.IsBitSet(kFollowLocalAvatar))
                    SetSubject(nil);
            }
            else
            {
                plGenRefMsg* msg = new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kSubject ); // SceneObject
                hsgResMgr::ResMgr()->AddViaNotify(pPMsg->fPlayer, msg, plRefFlags::kPassiveRef);

                fFlags.SetBit(kCutPosOnce);
                fFlags.SetBit(kCutPOAOnce);
            }
        }
        return true;
    }
    plControlEventMsg* pCMsg = plControlEventMsg::ConvertNoRef(msg);
    if (pCMsg)
    {
        if (pCMsg->ControlActivated())
        {
            SetMovementFlag(pCMsg->GetControlCode());
            if (pCMsg->GetControlCode() == S_SET_FREELOOK)
            {
                plInputManager::SetRecenterMouse(true);
                plMouseDevice::HideCursor();
            }
            if (pCMsg->GetControlCode() == B_CAMERA_ZOOM_IN && fFlags.IsBitSet(kZoomEnabled))
            {
                fFlags.SetBit(kAnimateFOV);
                fFOVhGoal = fZoomMin;
                fFOVwGoal = IMakeFOVwZoom(fZoomMin);
                fFOVwAnimRate = fFOVhAnimRate = -1*fZoomRate;
                fFOVEndTime = hsTimer::GetSysSeconds() + 60;
                return true;
            }
            else
            if (pCMsg->GetControlCode() == B_CAMERA_ZOOM_OUT && fFlags.IsBitSet(kZoomEnabled))
            {
                fFlags.SetBit(kAnimateFOV);
                fFOVhGoal = fZoomMax;
                fFOVwGoal = IMakeFOVwZoom(fZoomMin);
                fFOVwAnimRate = fFOVhAnimRate = fZoomRate;
                fFOVEndTime = hsTimer::GetSysSeconds() + 60;
                return true;
            }
            else
            if (pCMsg->GetControlCode() == B_CAMERA_RECENTER)
            {
                if (fFlags.IsBitSet(kZoomEnabled))
                {
                    fFlags.SetBit(kAnimateFOV);
                    fFOVhGoal = fZoomMin + ((fZoomMax - fZoomMin) / 2);
                    fFOVwGoal = IMakeFOVwZoom(fFOVhGoal);
                    if (fCamera->GetFOVh() >= fFOVhGoal)
                        fFOVwAnimRate = fFOVhAnimRate = -1*fZoomRate;
                    else
                        fFOVwAnimRate = fFOVhAnimRate = fZoomRate;
                    fFOVEndTime = hsTimer::GetSysSeconds() + 60;
                }
                return true;
            }
        }
        else
        {
            ClearMovementFlag(pCMsg->GetControlCode());
            if (pCMsg->GetControlCode() == S_SET_FREELOOK)
            {
                plInputManager::SetRecenterMouse(false);
                plMouseDevice::ShowCursor();
            }
            else
            if ( (pCMsg->GetControlCode() == B_CAMERA_ZOOM_IN || pCMsg->GetControlCode() == B_CAMERA_ZOOM_OUT)  
                && fFlags.IsBitSet(kZoomEnabled) )
            {
                fFlags.ClearBit(kAnimateFOV);
                return true;
            }

        }   
        return true;
    }
    
    return hsKeyedObject::MsgReceive(msg);
}

plSceneObject* plCameraBrain1::GetSubject()
{
    if (fSubjectKey)
        return plSceneObject::ConvertNoRef(fSubjectKey->ObjectIsLoaded());
    return nil;
}

void plCameraBrain1::SetSubject(plSceneObject* sub)
{
    if (sub)
        fSubjectKey = sub->GetKey();
    else
        fSubjectKey = nil;
}

//
//
// new drive mode brain
//


float plCameraBrain1_Drive::fTurnRate = 100.0f;
float plCameraBrain1_Drive::fAcceleration = 200.0f;
float plCameraBrain1_Drive::fDeceleration = 200.0f;
float plCameraBrain1_Drive::fMaxVelocity = 100.0f;


// constructor
plCameraBrain1_Drive::plCameraBrain1_Drive() : plCameraBrain1()
{
    fGoal.Set(100,100,100);
    fPOAGoal.Set(0,0,0);
    fUp.Set(0,0,1);
    fCamera->SetTargetPos(fGoal);
    fCamera->SetTargetPOA(fPOAGoal);
    fLastTime = 0.f;
}

plCameraBrain1_Drive::plCameraBrain1_Drive(plCameraModifier1* pMod) : plCameraBrain1(pMod)
{   
    fGoal.Set(100,100,100);
    fPOAGoal.Set(0,0,0);
    fUp.Set(0,0,1);
    fCamera->SetTargetPos(fGoal);
    fCamera->SetTargetPOA(fPOAGoal);
    fLastTime = 0.f;
}

// destructor
plCameraBrain1_Drive::~plCameraBrain1_Drive()
{
}


void plCameraBrain1_Drive::Push(bool recenter)
{
    plCameraBrain1::Push(recenter);
    plInputManager::SetRecenterMouse(true);
    fLastTime = hsTimer::GetSeconds();
}
void plCameraBrain1_Drive::Pop()
{   
    plInputManager::SetRecenterMouse(false);
}

// 
// Update Method
//
void plCameraBrain1_Drive::Update(bool forced)
{
    hsVector3 neg_up = -1 * fUp; 
    fTargetMatrix.Make(&fGoal, &fPOAGoal, &neg_up);
    
    // update our desired position:
    double time = hsTimer::GetSeconds();
    float eTime = (float)(time-fLastTime);
    if(eTime > 0.01f)
        eTime = 0.01f;
    fLastTime = time;
    hsPoint3 cameraPos = fCamera->GetTargetPos();
    hsVector3 view, up, right;
        
    fTargetMatrix.GetAxis(&view,&up,&right);
    float delta = 5.0f * eTime;

    // adjust speed
    if (HasMovementFlag(B_CAMERA_DRIVE_SPEED_UP))
    {
        plCameraBrain1_Drive::fAcceleration += delta;
        plCameraBrain1_Drive::fDeceleration += delta;
        plCameraBrain1_Drive::fMaxVelocity += delta;
    }
    if (HasMovementFlag(B_CAMERA_DRIVE_SPEED_DOWN))
    {
        plCameraBrain1_Drive::fAcceleration -= delta;
        plCameraBrain1_Drive::fDeceleration -= delta;
        plCameraBrain1_Drive::fMaxVelocity -= delta;

        if (plCameraBrain1_Drive::fAcceleration <= 0.0f)
            plCameraBrain1_Drive::fAcceleration = 0.0f;
        
        if (plCameraBrain1_Drive::fTurnRate <= 0.0f)
            plCameraBrain1_Drive::fTurnRate = 0.0f;
        
        if (plCameraBrain1_Drive::fDeceleration <= 0.0f)
            plCameraBrain1_Drive::fDeceleration = 0.0f;

        if (plCameraBrain1_Drive::fMaxVelocity <= 0.0f)
            plCameraBrain1_Drive::fMaxVelocity = 0.0f;

    }
    if (plVirtualCam1::Instance()->fUseAccelOverride)
    {
        fMaxVelocity = plVirtualCam1::Instance()->fVel;
    }

    float speed = fMaxVelocity;
    float turn = 1.0f;
    
    if (HasMovementFlag(B_CONTROL_MODIFIER_FAST))
    {
        turn *= 0.25;
        speed *= 10;
    }
    if (HasMovementFlag(B_CAMERA_MOVE_FORWARD))
    {
        cameraPos += view * speed * eTime;
    }
    if (HasMovementFlag(B_CAMERA_MOVE_BACKWARD))
    {
        cameraPos += view * speed * eTime * -1;
    }
    if (HasMovementFlag(B_CAMERA_MOVE_LEFT))
    {
        cameraPos += right * speed * eTime * -1;
    }
    if (HasMovementFlag(B_CAMERA_MOVE_RIGHT))
    {
        cameraPos += right * speed * eTime;
    }
    if (HasMovementFlag(B_CAMERA_MOVE_DOWN))
    {
        cameraPos += up * speed * eTime * -1;
    }
    if (HasMovementFlag(B_CAMERA_MOVE_UP))
    {
        cameraPos += up * speed * eTime;
    }
    fGoal = cameraPos;

    IMoveTowardGoal(eTime);
    hsMatrix44 rot;

    // make sure camera is perpindicular to absolute up
    fTargetMatrix.fMap[0][2] = 0.0f;
    fTargetMatrix.fMap[1][2] = 0.0f;

    fTargetMatrix.GetAxis(&view,&up,&right);

    if ( HasMovementFlag( B_CAMERA_ROTATE_RIGHT ) ||  HasMovementFlag( B_CAMERA_ROTATE_LEFT ) )
    {
        hsQuat q(turn * fTurnRate * eTime * deltaX, &up);   
        q.NormalizeIfNeeded();
        q.MakeMatrix(&rot);
        ClearMovementFlag( B_CAMERA_ROTATE_RIGHT );
        ClearMovementFlag( B_CAMERA_ROTATE_LEFT );
        fTargetMatrix = rot * fTargetMatrix;
    }
    rot.Reset();

    if ( HasMovementFlag( B_CAMERA_ROTATE_UP ) || HasMovementFlag(B_CAMERA_ROTATE_DOWN) )
    {
        hsQuat q(turn * fTurnRate* eTime * deltaY, &right); 
        q.NormalizeIfNeeded();
        q.MakeMatrix(&rot);
        ClearMovementFlag( B_CAMERA_ROTATE_UP );
        ClearMovementFlag( B_CAMERA_ROTATE_DOWN );
        fTargetMatrix = rot * fTargetMatrix;
    }

    fTargetMatrix.GetAxis(&view,&up,&right);
    hsPoint3 at(fGoal + (view * 2.0f));

    // Now passing in Up for up parameter, instead of down. mf_flip_up - mf
    fTargetMatrix.MakeCamera(&fGoal, &at, &up);
    
    fPOAGoal = at;
    fUp = up;

    fCamera->SetTargetPos(fGoal);
    fCamera->SetTargetPOA(fPOAGoal);
}

bool plCameraBrain1_Drive::MsgReceive(plMessage* msg)
{
    plMouseEventMsg* pMouseMsg = plMouseEventMsg::ConvertNoRef(msg);
    if( pMouseMsg )
    {
        if (pMouseMsg->GetDX() > 0.4 || pMouseMsg->GetDX() < -0.4)
        {
            bDisregardY = true;
            return true;
        }
        else
        if (pMouseMsg->GetDY() > 0.4 || pMouseMsg->GetDY() < -0.4)
        {
            bDisregardX = true;
            return true;
        }

        if (bDisregardY && pMouseMsg->GetDY() != 0.0)
        {
            bDisregardY = false;
            return true;
        }   
        
        if (bDisregardX && pMouseMsg->GetDX() != 0.0)
        {
            bDisregardX = false;
            return true;
        }
        if (pMouseMsg->GetDX() < 0)
        {
            SetMovementFlag( B_CAMERA_ROTATE_RIGHT );
            deltaX = pMouseMsg->GetDX();
        }
        else
        if (pMouseMsg->GetDX() > 0)
        {
            SetMovementFlag( B_CAMERA_ROTATE_LEFT );
            deltaX = pMouseMsg->GetDX();
        }
        else
        if (pMouseMsg->GetDY() > 0)
        {
            SetMovementFlag( B_CAMERA_ROTATE_DOWN );
            deltaY = pMouseMsg->GetDY();
        }
        else
        if (pMouseMsg->GetDY() < 0)
        {
            deltaY = pMouseMsg->GetDY();
            SetMovementFlag( B_CAMERA_ROTATE_UP );
        }
        
        return true;
    }
    
    return plCameraBrain1::MsgReceive(msg);
}



//
//
//
// new simplified avatar camera

// constructor
plCameraBrain1_Avatar::plCameraBrain1_Avatar() : plCameraBrain1()
{
    bObscured = false;
    fOffset.Set(0,0,0);
    fPOAOffset.Set(0,0,0);
    fFaded = false;
}

plCameraBrain1_Avatar::plCameraBrain1_Avatar(plCameraModifier1* pMod) : plCameraBrain1(pMod)
{
    bObscured = false;
    fOffset.Set(0,0,0);
    fPOAOffset.Set(0,0,0);
    fFaded = false;
}
    

// destructor
plCameraBrain1_Avatar::~plCameraBrain1_Avatar()
{
    if (!plNetClientMgr::GetInstance())
        return;
        
    if (fFaded)
    {
        plCameraTargetFadeMsg* pMsg = new plCameraTargetFadeMsg;
        pMsg->SetFadeOut(false);
        pMsg->SetSubjectKey(plNetClientMgr::GetInstance()->GetLocalPlayerKey());
        pMsg->SetBCastFlag(plMessage::kBCastByExactType);
        pMsg->SetBCastFlag(plMessage::kNetPropagate, false);
        pMsg->AddReceiver(plNetClientMgr::GetInstance()->GetLocalPlayerKey());
        plgDispatch::MsgSend(pMsg);
    }

}

void plCameraBrain1_Avatar::Pop()
{
    bObscured = false;
    if (fFaded)
        ISendFadeMsg(false);
    plCameraBrain1::Pop();
}

void plCameraBrain1_Avatar::Push(bool recenter)
{
    bObscured = false;
    fFallTimer = 0.0f;
    plCameraBrain1::Push(recenter);
}


// 
// Update Method
//
void plCameraBrain1_Avatar::Update(bool forced)
{
    if (!GetSubject())
        return;
    if (HasFlag(kBeginFalling) && hsTimer::GetSysSeconds() >= fFallTimer)
    {
        fFallTimer = 0.0f;
        
        fFlags.SetBit(kFalling);
        fFlags.ClearBit(kBeginFalling);
        plVirtualCam1::Instance()->SetFlags(plVirtualCam1::kFalling);
        plVirtualCam1::Instance()->StartUnPan();
        fOffsetPct = 1.0f;
        
    }
    // determine elapsed time;
    double secs = hsTimer::GetDelSysSeconds();
    if (forced)
        secs = 10.0f;

    if (fFlags.IsBitSet(kIsTransitionCamera))
    {
        if (GetKey())
            hsStatusMessageF("%s thinks it's the transition camera\n", GetKeyName().c_str());
    }
    else
    {
        CalculatePosition();
        AdjustForInput(secs);
    }
    
    IMoveTowardGoal(secs);
    IPointTowardGoal(secs);
    
    if (fFlags.IsBitSet(kAnimateFOV))
        IAnimateFOV(secs);
}

//
// Calculate the best position for the camera in basic follow mode:
//
void plCameraBrain1_Avatar::CalculatePosition()
{
    if (!GetSubject() || !GetSubject()->GetCoordinateInterface())
        return;
        
    // get target pos
    hsPoint3 targetFrom = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
    
    // get view normal
    hsVector3 view = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kView);
    hsVector3 right = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kRight);
    
    // compute camera position and interest
    if (HasFlag(kWorldspacePos))
    {
        fGoal = targetFrom + GetOffset();
    }
    else
    {
        fGoal = targetFrom;
        if (!fFlags.IsBitSet(kFalling))
        {
            fGoal = fGoal - view * GetOffset().fY;
            fGoal = fGoal - right * GetOffset().fX;
            fGoal.fZ += GetOffset().fZ;
        }
        else
        {
            fGoal = fGoal - view * 0.5;
            fGoal.fZ += 20;
        }
    }

    if (HasFlag(kWorldspacePOA))
    {
        fPOAGoal = targetFrom + GetPOAOffset();
    }
    else
    {
        fPOAGoal = targetFrom;
        //if (!fFlags.IsBitSet(kFalling))
        {
            fPOAGoal = fPOAGoal - view * GetPOAOffset().fY;
            fPOAGoal = fPOAGoal - right * GetPOAOffset().fX;
            fPOAGoal.fZ += GetPOAOffset().fZ;
        }
    }

    // check to see if we've lagged too far behind
    hsVector3 dist(fCamera->GetTargetPos() - fGoal);
    if (dist.MagnitudeSquared() > (4*fOffset.MagnitudeSquared()))
        SetFlags(kPanicVelocity);
    else
        ClearFlags(kPanicVelocity);

    // check LOS
    if (GetCamera()->GetKey() && fFlags.IsBitSet(kMaintainLOS) && (plVirtualCam1::Instance()->GetCurrentStackCamera() == GetCamera()))
    {
        plLOSRequestMsg* pMsg = new plLOSRequestMsg( GetCamera()->GetKey(), fPOAGoal, fGoal, plSimDefs::kLOSDBCameraBlockers,
            plLOSRequestMsg::kTestClosest, plLOSRequestMsg::kReportHitOrMiss);
        plgDispatch::MsgSend( pMsg );
    }
    
    if (bObscured)
    {
        fGoal = fHitPoint + (fHitNormal * 0.5f);
        
        hsVector3 newOff(fGoal - fPOAGoal);
        hsVector3 actualOff(fCamera->GetTargetPos() - fPOAGoal);
        if (newOff.MagnitudeSquared() <= 16.0f && actualOff.MagnitudeSquared() <= 16.0f && !fFaded)
        {
            ISendFadeMsg(true);
            fFaded = true;
        }
        else
        if (newOff.MagnitudeSquared() >= 16.0f && fFaded)
        {
            ISendFadeMsg(false);
            fFaded = false;
        }
    }
    else
    if (fFaded && !bObscured)
    {
        ISendFadeMsg(false);
        fFaded = false;
    }
}   


void plCameraBrain1_Avatar::IHandleObstacle()
{
    // swing around the 'obstacle'
}

void plCameraBrain1_Avatar::ISendFadeMsg(bool fade)
{
    if (plVirtualCam1::IsCurrentCamera(GetCamera()))
    {
        if (fade)
            plVirtualCam1::AddMsgToLog("current camera sending Fade Out message to Avatar");
        else
            plVirtualCam1::AddMsgToLog("current camera sending Fade In message to Avatar");
    
        plCameraTargetFadeMsg* pMsg = new plCameraTargetFadeMsg;
        pMsg->SetFadeOut(fade);
        pMsg->SetSubjectKey(GetSubject()->GetKey());
        pMsg->SetBCastFlag(plMessage::kBCastByExactType);
        pMsg->SetBCastFlag(plMessage::kNetPropagate, false);
        pMsg->AddReceiver(GetSubject()->GetKey());
        plgDispatch::MsgSend(pMsg);
    }
}

bool plCameraBrain1_Avatar::MsgReceive(plMessage* msg)
{
    plLOSHitMsg *pLOSMsg = plLOSHitMsg::ConvertNoRef( msg );
    if( pLOSMsg )
    {
        bObscured = !pLOSMsg->fNoHit;
        fHitPoint = pLOSMsg->fHitPoint;
        fHitNormal = pLOSMsg->fNormal;
        if (pLOSMsg->fHitFlags & plSimDefs::kLOS_CameraAvoidObject)
            fObstacle = (plSceneObject*)pLOSMsg->fObj->GetObjectPtr();
        else
            fObstacle = nil;
        return true;
    }
    plMouseEventMsg* pMouseMsg = plMouseEventMsg::ConvertNoRef(msg);
    if( pMouseMsg )
    {
        if (pMouseMsg->GetButton() == kWheelPos || pMouseMsg->GetButton() == kWheelNeg)
        {
            if (fFlags.IsBitSet(kFalling))
                return true;
        
            fOffsetPct += -1 * ( (pMouseMsg->GetWheelDelta() / 24) * 0.01f);
            if (fOffsetPct > 1.0f)
                fOffsetPct = 1.0f;
            else
            if (fOffsetPct < 0.1f)
                fOffsetPct = 0.1f;
            return true;
        }
    }
    plGenRefMsg* pRefMsg = plGenRefMsg::ConvertNoRef(msg);
    if (pRefMsg)
    {
        if (pRefMsg->fType == kSubject)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
            {
                SetSubject((plSceneObject*)pRefMsg->GetRef());
                plSceneObject* avSO = nil;
                if (plNetClientMgr::GetInstance())
                    avSO = plSceneObject::ConvertNoRef(plNetClientMgr::GetInstance()->GetLocalPlayer());

                if (GetSubject() == avSO)
                {
                    plArmatureMod* avMod = plAvatarMgr::GetInstance()->GetLocalAvatar();
                    if (avMod)
                        avMod->RegisterForBehaviorNotify(GetKey());
                }
            }
            else
                SetSubject(nil);
            return true;
        }
    }
    plAvatarBehaviorNotifyMsg *behNotifymsg = plAvatarBehaviorNotifyMsg::ConvertNoRef(msg);
    if (behNotifymsg)
    {
        if (behNotifymsg->fType == plHBehavior::kBehaviorTypeFall && fFlags.IsBitSet(kVerticalWhenFalling))
        {
            if (behNotifymsg->state)
            {   
                SetFlags(kBeginFalling);
                fFallTimer = hsTimer::GetSysSeconds() + plVirtualCam1::fFallTimerDelay;
            }
            else
            if (!behNotifymsg->state)
            {
                if (fFlags.IsBitSet(kFalling))
                {   plVirtualCam1::Instance()->ClearFlags(plVirtualCam1::kFalling);
                    fFlags.ClearBit(kFalling);
                }
                else
                {
                    ClearFlags(kBeginFalling);
                    fFallTimer = 0.0f;
                }
            }
        }
        else
        if (behNotifymsg->fType == plHBehavior::kBehaviorTypeFall)
        {
            if (behNotifymsg->state && fFlags.IsBitSet(kSpeedUpWhenRunning))
                fFlags.SetBit(kRunning);
            else
                fFlags.ClearBit(kRunning);
        }
        return true;
    }
    return plCameraBrain1::MsgReceive(msg);
}

void plCameraBrain1_Avatar::Read(hsStream* stream, hsResMgr* mgr)
{
    plCameraBrain1::Read(stream, mgr);
    fOffset.Read(stream);
    SetFlags(kCutPOA);
    
    if (fFlags.IsBitSet(kFollowLocalAvatar) && GetSubject())
    {
        plSceneObject* avSO = plSceneObject::ConvertNoRef(plNetClientMgr::GetInstance()->GetLocalPlayer());
        if (GetSubject() == avSO)
        {
            plArmatureMod* avMod = plAvatarMgr::GetInstance()->GetLocalAvatar();
            if (avMod)
                avMod->RegisterForBehaviorNotify(GetKey());
        }
    }

}

void plCameraBrain1_Avatar::Write(hsStream* stream, hsResMgr* mgr)
{
    plCameraBrain1::Write(stream, mgr);
    fOffset.Write(stream);
}


//
// first person cam, derived from avatar cam -
// only difference is push() & pop() fade avatar in/out
//

plCameraBrain1_FirstPerson::plCameraBrain1_FirstPerson() : plCameraBrain1_Avatar()
{
    fPosNode = nil;
}

plCameraBrain1_FirstPerson::plCameraBrain1_FirstPerson(plCameraModifier1* pMod) : plCameraBrain1_Avatar(pMod)
{
}   

// destructor
plCameraBrain1_FirstPerson::~plCameraBrain1_FirstPerson()
{
}

bool plCameraBrain1_FirstPerson::MsgReceive(plMessage* msg)
{

    plGenRefMsg* pRefMsg = plGenRefMsg::ConvertNoRef(msg);
    if (pRefMsg)
    {
        if (pRefMsg->fType == kSubject)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
            {   
                fPosNode = nil;
                SetSubject((plSceneObject*)pRefMsg->GetRef());
                // are we the built-in 1st person camera?  If we are, change our subject pointer to FPCameraOrigin node on the avatar
                plUoid U(kDefaultCameraMod1_KEY);
                plKey pKey = hsgResMgr::ResMgr()->FindKey(U);
                if (pKey && pKey == fCamera->GetKey())
                {
                    const plCoordinateInterface* ci = GetSubject()->GetCoordinateInterface();
                    for (int i = 0; i < ci->GetNumChildren(); i++)
                    {
                        plSceneObject* child = (plSceneObject*)ci->GetChild(i)->GetOwner();
                        if (child)
                        {
                            const plString& name = child->GetKeyName();
                            if (name.Compare("FPCameraOrigin", plString::kCaseInsensitive) == 0)
                            {
                                fPosNode = child;
                                SetOffset(hsVector3(0,0,0));
                                SetPOAOffset(hsVector3(0,-10,0));
                                return true;
                            }
                        }
                    }
                }
            }
            else
            {
                fPosNode = nil;
                SetSubject(nil);
            }
            return true;
        }
    }
    plMouseEventMsg* pMouseMsg = plMouseEventMsg::ConvertNoRef(msg);
    if( pMouseMsg )
    {
        if (pMouseMsg->GetButton() == kWheelPos || pMouseMsg->GetButton() == kWheelNeg)
        {
            return true;
        }
    }
    return plCameraBrain1_Avatar::MsgReceive(msg);
}

void plCameraBrain1_FirstPerson::CalculatePosition()
{
    // get target pos
    hsPoint3 targetFrom;
    if (fPosNode)
        targetFrom = fPosNode->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
    else
        targetFrom = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();

    // get view normal
    hsVector3 view = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kView);
    hsVector3 right = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kRight);
    
    // compute camera position and interest
    if (HasFlag(kWorldspacePos))
    {
        fGoal = targetFrom + GetOffset();
    }
    else
    {
        fGoal = targetFrom;
        fGoal = fGoal - view * GetOffset().fY;
        fGoal = fGoal - right * GetOffset().fX;
        fGoal.fZ += GetOffset().fZ;
    }

    if (HasFlag(kWorldspacePOA))
    {
        fPOAGoal = targetFrom + GetPOAOffset();
    }
    else
    {
        fPOAGoal = targetFrom;
        fPOAGoal = fPOAGoal - view * GetPOAOffset().fY;
        fPOAGoal = fPOAGoal - right * GetPOAOffset().fX;
        fPOAGoal.fZ += GetPOAOffset().fZ;
    }

    // check to see if we've lagged too far behind
    hsVector3 dist(fCamera->GetTargetPos() - fGoal);
    if (dist.MagnitudeSquared() > (4*fOffset.MagnitudeSquared()))
        SetFlags(kPanicVelocity);
    else
        ClearFlags(kPanicVelocity);

    // check LOS
    if (GetCamera()->GetKey() && fFlags.IsBitSet(kMaintainLOS) && (plVirtualCam1::Instance()->GetCurrentStackCamera() == GetCamera()))
    {
        plLOSRequestMsg* pMsg = new plLOSRequestMsg( GetCamera()->GetKey(), fPOAGoal, fGoal, plSimDefs::kLOSDBCameraBlockers,
            plLOSRequestMsg::kTestClosest, plLOSRequestMsg::kReportHitOrMiss);
        plgDispatch::MsgSend( pMsg );
    }
    
    if (bObscured)
    {
        fGoal = fHitPoint + (fHitNormal * 0.5f);
        
        hsVector3 newOff(fGoal - fPOAGoal);
        hsVector3 actualOff(fCamera->GetTargetPos() - fPOAGoal);
        if (newOff.MagnitudeSquared() <= 16.0f && actualOff.MagnitudeSquared() <= 16.0f && !fFaded)
        {
            ISendFadeMsg(true);
            fFaded = true;
        }
        else
        if (newOff.MagnitudeSquared() >= 16.0f && fFaded)
        {
            ISendFadeMsg(false);
            fFaded = false;
        }
    }
    else
    if (fFaded && !bObscured)
    {
        ISendFadeMsg(false);
        fFaded = false;
    }
}   


void plCameraBrain1_FirstPerson::Push(bool recenter)
{
    if (!GetSubject())
        return; 
    
    if (plCameraBrain1_FirstPerson::fDontFade)
        return;
    plEnableMsg* pMsg = new plEnableMsg;
    pMsg->SetCmd(plEnableMsg::kDisable);
    pMsg->AddType(plEnableMsg::kDrawable);
    pMsg->SetBCastFlag(plMessage::kPropagateToModifiers);
    pMsg->AddReceiver(GetSubject()->GetKey());
    pMsg->SetSender(GetCamera()->GetKey());
    plgDispatch::MsgSend(pMsg);
    plCameraBrain1::Push(recenter);
    
    ISendFadeMsg(true);
}

void plCameraBrain1_FirstPerson::Pop()
{

    plCameraBrain1::Pop();
    if (!GetSubject())
        return;
    
    ISendFadeMsg(false);
}

//
// true fixed cam, derived from basic cam -
// Has a separate interest point object it maintains
//

plCameraBrain1_Fixed::plCameraBrain1_Fixed() : plCameraBrain1()
{
    fTargetPoint= nil;
}

plCameraBrain1_Fixed::plCameraBrain1_Fixed(plCameraModifier1* pMod) : plCameraBrain1(pMod)
{
    fTargetPoint = nil;
}   

// destructor
plCameraBrain1_Fixed::~plCameraBrain1_Fixed()
{
}

void plCameraBrain1_Fixed::Read(hsStream* stream, hsResMgr* mgr)
{
    plCameraBrain1::Read(stream, mgr);
    mgr->ReadKeyNotifyMe( stream, new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, 99), plRefFlags::kPassiveRef);
}

void plCameraBrain1_Fixed::Write(hsStream* stream, hsResMgr* mgr)
{
    plCameraBrain1::Write(stream, mgr);
    mgr->WriteKey(stream, fTargetPoint);
}

void plCameraBrain1_Fixed::Update(bool forced)
{
    double secs = hsTimer::GetDelSysSeconds();
    if (forced)
        secs = 10.0f;
    
    if (!fFlags.IsBitSet(kIsTransitionCamera))
    {
        if(fTargetPoint)
            fTargetPoint->GetBrain()->Update();

        if (GetSubject())
        {
            fTargetMatrix = fCamera->GetTarget()->GetCoordinateInterface()->GetLocalToWorld();
            fGoal = fTargetMatrix.GetTranslate();
            
            // get target pos
            hsPoint3 targetFrom = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
            
            // get view normal
            hsVector3 view = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kView);
            hsVector3 right = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetAxis(hsMatrix44::kRight);
            
            // compute camera position and interest
            if (HasFlag(kWorldspacePOA))
            {
                fPOAGoal = targetFrom + GetPOAOffset();
            }
            else
            {
                fPOAGoal = targetFrom;
                fPOAGoal = fPOAGoal - view * GetPOAOffset().fY;
                fPOAGoal = fPOAGoal - right * GetPOAOffset().fX;
                fPOAGoal.fZ += GetPOAOffset().fZ;
            }

        }
        else
        {   
            if (fCamera->GetTarget())
            {
                fTargetMatrix = fCamera->GetTarget()->GetCoordinateInterface()->GetLocalToWorld();
                hsVector3 view;
                hsVector3 up;
                fTargetMatrix.GetAxis(0, &view, &up);
                fGoal = fTargetMatrix.GetTranslate();
                if (fTargetPoint)
                    fPOAGoal = fTargetPoint->GetBrain()->GetGoal();
                else
                    fPOAGoal = fGoal - (view * 10);
            }
        }
        if (fFlags.IsBitSet(kRailComponent) && fRail)
        {       
            if (fCurCamSpeed == 0)
                fCurCamSpeed = 1.0f;
            if (forced)
                fGoal = fRail->GetGoal(10, 10);
            else
                fGoal = fRail->GetGoal(secs, fCurCamSpeed);
        }
        AdjustForInput(secs);
    }
    IMoveTowardGoal(secs);
    IPointTowardGoal(secs);
    if (fFlags.IsBitSet(kAnimateFOV))
        IAnimateFOV(secs);
}

void plCameraBrain1_Fixed::CalculatePosition()
{
}

bool plCameraBrain1_Fixed::MsgReceive(plMessage* msg)
{
    plGenRefMsg* pRefMsg = plGenRefMsg::ConvertNoRef(msg);
    if (pRefMsg)
    {
        if (pRefMsg->GetContext() == plRefMsg::kOnCreate &&
            pRefMsg->fType == 99)
        {
            fTargetPoint = (plCameraModifier1*)(pRefMsg->GetRef());
        }
    }
    return (plCameraBrain1::MsgReceive(msg));
}



//
//
//
// circle camera crap
static const float kTwoPI    = 2.0f*M_PI;

plCameraBrain1_Circle::plCameraBrain1_Circle() : plCameraBrain1_Fixed()
{ 
    fCircleFlags = 0;
    fCenterObject = nil;
    fCenter.Set(0,0,0);
    fCurRad = fGoalRad = 1;
    fPOAObj = nil;
    fCirPerSec = 0.25f;
}
plCameraBrain1_Circle::plCameraBrain1_Circle(plCameraModifier1* pMod) : plCameraBrain1_Fixed(pMod)
{ 
    fCircleFlags = 0;
    fCenterObject = nil;
    fCenter.Set(0,0,0);
    fCurRad = fGoalRad = 1;
    fPOAObj = nil;
    fCirPerSec = 0.25f;
}

plCameraBrain1_Circle::~plCameraBrain1_Circle() 
{ 
}

//
//
//
void plCameraBrain1_Circle::Update(bool forced)
{
    double secs = hsTimer::GetDelSysSeconds();
    if (forced)
        secs = 10.0f;

    if (!GetSubject() || !GetSubject()->GetCoordinateInterface())
        return;
    hsPoint3 sub = GetSubject()->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
    fGoal = IGetClosestPointOnCircle(&sub);
    
    if (fPOAObj && fPOAObj->GetCoordinateInterface())
        fPOAGoal = fPOAObj->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
    else
        fPOAGoal = GetCenterPoint();
    
    fPOAGoal += fPOAOffset;
    
    hsPoint3 goalpos = fCamera->GetTargetPos();
    if (HasFlag(kCutPosOnce))
    {
        fGoal = MoveTowardsFromGoal(&goalpos, secs, true);
        fFlags.ClearBit(kCutPos);
    }
    else
    {   
        fGoal = MoveTowardsFromGoal(&goalpos, secs);
        fFlags.SetBit(kCutPos);
    }
    AdjustForInput(secs);
    
    IMoveTowardGoal(secs);
    IPointTowardGoal(secs);
    if (fFlags.IsBitSet(kAnimateFOV))
        IAnimateFOV(secs);
}

//
// keep us on the circle
//
hsPoint3 plCameraBrain1_Circle::MoveTowardsFromGoal(const hsPoint3* fromGoal, double secs, bool warp)
{

    if (fCurRad != fGoalRad)
    {
        float dist = hsABS(fGoalRad-fCurRad);
    
        hsAssert(dist>=0 && dist<=kTwoPI, "illegal radian diff");
        bool mustWrap = (dist > M_PI);  // go opposite direction for shortcut and wrap

        // compute speed
        float speed; 
        if (warp)
            speed = (float)(kTwoPI * 100 * secs);
        else
            speed = (float)(kTwoPI * fCirPerSec * secs);

        // move towards goalRad
        hsAssert(fCurRad>=0 && fCurRad<=kTwoPI, "illegal radian value");

        if (fCurRad<fGoalRad)
        {
            if (mustWrap)
            {
                fCurRad-=speed;
                bool didWrap=false;
                while(fCurRad<0)
                {
                    didWrap=true;
                    fCurRad+=kTwoPI;
                }
                if (fCurRad<fGoalRad && didWrap)
                    fCurRad=fGoalRad;
            }
            else
            {
                fCurRad+=speed;
                if (fCurRad>fGoalRad)
                    fCurRad=fGoalRad;
            }
        }
        else
        {
            if (mustWrap)
            {
                fCurRad+=speed;
                bool didWrap=false;
                while(fCurRad>kTwoPI)
                {
                    didWrap=true;
                    fCurRad-=kTwoPI;
                }
                if (fCurRad>fGoalRad && didWrap)
                    fCurRad=fGoalRad;
            }
            else
            {
                fCurRad-=speed;
                if (fCurRad<fGoalRad)
                    fCurRad=fGoalRad;
            }
        }
    }
    hsAssert(fCurRad>=0 && fCurRad<=kTwoPI, "illegal radian value");
    
    hsPoint3 x;
    x = GetCenterPoint() + hsVector3((float)cos(fCurRad)*fRadius, (float)sin(fCurRad)*fRadius, 0.0f);
    x.fZ = fCamera->GetTargetPos().fZ;
    return x;
}

hsPoint3 plCameraBrain1_Circle::IGetClosestPointOnCircle(const hsPoint3* toThis)
{
    hsPoint3 center=GetCenterPoint();
    hsPoint3 p(toThis->fX, toThis->fY, center.fZ);  // Move to plane of circle
    hsVector3 v;
    if (!(GetCircleFlags() & kFarthest) )
    {
        v = hsVector3(&p, &center);
    }
    else
    {
        // farthest
        v = hsVector3(&center, &p);
    }
    v.Normalize();
    fGoalRad = (float)atan2(v.fY, v.fX); // -pi to pi
    hsAssert(fGoalRad>=-M_PI && fGoalRad<=M_PI, "Illegal atan2 val");
    if (fGoalRad<0)
        fGoalRad = kTwoPI + fGoalRad;   // 0 to 2pi
    hsAssert(fGoalRad>=0 && fGoalRad<=kTwoPI, "Illegal atan2 val");
    v = v * fRadius;
    center = center + v;
    center.fZ = fCamera->GetTargetPos().fZ;
    return (center);
}


hsPoint3 plCameraBrain1_Circle::GetCenterPoint()
{
    if (fCenterObject && fCenterObject->GetCoordinateInterface())
    {
        return fCenterObject->GetCoordinateInterface()->GetLocalToWorld().GetTranslate();
    }
    return fCenter;
}

void plCameraBrain1_Circle::Write(hsStream* stream, hsResMgr* mgr)
{
    plCameraBrain1::Write(stream, mgr);
    stream->WriteLE32(GetCircleFlags());
    fCenter.Write(stream);
    stream->WriteLEScalar(GetRadius());
    mgr->WriteKey(stream, fCenterObject);
    mgr->WriteKey(stream, fPOAObj);
    stream->WriteLEScalar(fCirPerSec);
}

void plCameraBrain1_Circle::Read(hsStream* stream, hsResMgr* mgr)
{
    plCameraBrain1::Read(stream, mgr);
    SetCircleFlags(stream->ReadLE32());
    if (GetCircleFlags() & kCircleLocalAvatar)
    {
        if (plNetClientApp::GetInstance() && plNetClientApp::GetInstance()->GetLocalPlayer())
            SetPOAObject((plSceneObject*)plNetClientApp::GetInstance()->GetLocalPlayer());
            
        plgDispatch::Dispatch()->RegisterForExactType(plPlayerPageMsg::Index(), GetKey());
    }

    fCenter.Read(stream);
    SetRadius(stream->ReadLEScalar());
    plGenRefMsg* msg = new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kCircleTarget ); // SceneObject
    mgr->ReadKeyNotifyMe( stream, msg, plRefFlags::kActiveRef );
    plGenRefMsg* msg2 = new plGenRefMsg( GetKey(), plRefMsg::kOnRequest, 0, kPOAObject ); // SceneObject
    mgr->ReadKeyNotifyMe( stream, msg2, plRefFlags::kActiveRef );
    fCirPerSec = stream->ReadLEScalar();
    plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
}

bool plCameraBrain1_Circle::MsgReceive(plMessage* msg)
{
    plGenRefMsg* pRefMsg = plGenRefMsg::ConvertNoRef(msg);
    if (pRefMsg)
    {
        if (pRefMsg->fType == kCircleTarget)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
                fCenterObject = (plSceneObject*)pRefMsg->GetRef();
            else
                fCenterObject = nil;
            return true;
        }
        else
        if (pRefMsg->fType == kPOAObject)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
                fPOAObj = (plSceneObject*)pRefMsg->GetRef();
            else
                fPOAObj = nil;
            return true;
        }
        else
        if (pRefMsg->fType == kSubject)
        {
            if( pRefMsg->GetContext() & ( plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace ) )
                SetSubject((plSceneObject*)pRefMsg->GetRef());
            else
                SetSubject(nil);
            return true;
        }
    }
    plPlayerPageMsg* pPMsg = plPlayerPageMsg::ConvertNoRef(msg);
    if (pPMsg && pPMsg->fPlayer == plNetClientMgr::GetInstance()->GetLocalPlayerKey())
    {
        if (pPMsg->fUnload)
        {
            if (GetCircleFlags() & kCircleLocalAvatar)
                fPOAObj = nil;
            if (fFlags.IsBitSet(kFollowLocalAvatar))
                SetSubject(nil);
        }
        else
        {
            if (GetCircleFlags() & kCircleLocalAvatar)
            {   
                SetPOAObject((plSceneObject*)pPMsg->fPlayer->GetObjectPtr());
                fFlags.SetBit(kCutPOA);
            }
            if (fFlags.IsBitSet(kFollowLocalAvatar))
            {
                plGenRefMsg* msg = new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kSubject ); // SceneObject
                hsgResMgr::ResMgr()->AddViaNotify(pPMsg->fPlayer, msg, plRefFlags::kPassiveRef);

                fFlags.SetBit(kCutPosOnce);
                fFlags.SetBit(kCutPOA);
            }
        }
        return true;
    }
    return (plCameraBrain1_Fixed::MsgReceive(msg));
}