CWE-ou-minkata/Sources/Plasma/FeatureLib/pfAnimation/plLineFollowMod.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
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/

#include "hsTypes.h"
#include "plLineFollowMod.h"
#include "plStereizer.h"
#include "plInterp/plAnimPath.h"
#include "hsResMgr.h"
#include "pnMessage/plRefMsg.h"
#include "pnSceneObject/plSceneObject.h"
#include "pnSceneObject/plCoordinateInterface.h"
#include "pnSceneObject/plDrawInterface.h"
#include "plgDispatch.h"
#include "plMessage/plListenerMsg.h"
#include "plMessage/plRenderMsg.h"
#include "pnMessage/plTimeMsg.h"
#include "hsBounds.h"
#include "plPipeline.h"
#include "hsFastMath.h"
#include "pnMessage/plPlayerPageMsg.h"
#include "pnNetCommon/plNetApp.h"
#include "plNetClient/plNetClientMgr.h"
#include "hsTimer.h"

plLineFollowMod::plLineFollowMod()
:   fPath(nil),
    fPathParent(nil),
    fRefObj(nil),
    fFollowMode(kFollowListener),
    fFollowFlags(kNone),
    fOffset(0),
    fOffsetClamp(0),
    fSpeedClamp(0)
{
    fSearchPos.Set(0,0,0);
}

plLineFollowMod::~plLineFollowMod()
{
    delete fPath;
}

void plLineFollowMod::SetSpeedClamp(hsScalar fps)
{
    fSpeedClamp = fps;
    if( fSpeedClamp > 0 )
    {
        fFollowFlags |= kSpeedClamp;
    }
    else
    {
        fFollowFlags &= ~kSpeedClamp;
    }

}

void plLineFollowMod::SetOffsetFeet(hsScalar f)
{
    fOffset = f;
    if( fOffset != 0 )
    {
        fFollowFlags &= ~kOffsetAng;
        fFollowFlags |= kOffsetFeet;
    }
    else
    {
        fFollowFlags &= ~kOffset;
    }
}

void plLineFollowMod::SetForceToLine(hsBool on)
{
    if( on )
        fFollowFlags |= kForceToLine;
    else
        fFollowFlags &= ~kForceToLine;
}

void plLineFollowMod::SetOffsetDegrees(hsScalar f)
{
    fOffset = hsScalarDegToRad(f);
    if( fOffset != 0 )
    {
        fFollowFlags &= ~kOffsetFeet;
        fFollowFlags |= kOffsetAng;
        fTanOffset = tanf(f);
    }
    else
    {
        fFollowFlags &= ~kOffset;
    }
}

void plLineFollowMod::SetOffsetClamp(hsScalar f)
{
    fOffsetClamp = f;
    if( fOffsetClamp > 0 )
    {
        fFollowFlags |= kOffsetClamp;
    }
    else
    {
        fFollowFlags &= ~kOffsetClamp;
    }
}

void plLineFollowMod::SetPath(plAnimPath* path)
{
    delete fPath;
    fPath = path;
}

void plLineFollowMod::Read(hsStream* stream, hsResMgr* mgr)
{
    plMultiModifier::Read(stream, mgr);

    fPath = plAnimPath::ConvertNoRef(mgr->ReadCreatable(stream));

    mgr->ReadKeyNotifyMe(stream, TRACKED_NEW plGenRefMsg(GetKey(), plRefMsg::kOnCreate, 0, kRefParent), plRefFlags::kPassiveRef);

    mgr->ReadKeyNotifyMe(stream, TRACKED_NEW plGenRefMsg(GetKey(), plRefMsg::kOnCreate, 0, kRefObject), plRefFlags::kPassiveRef);

    int n = stream->ReadSwap32();
    while(n--)
    {
        mgr->ReadKeyNotifyMe(stream, TRACKED_NEW plGenRefMsg(GetKey(), plRefMsg::kOnCreate, 0, kRefStereizer), plRefFlags::kPassiveRef);
    }

    UInt32 f = stream->ReadSwap32();
    SetFollowMode(FollowMode(f & 0xffff));

    fFollowFlags = (UInt16)((f >> 16) & 0xffff);

    if( fFollowFlags & kOffset )
    {
        fOffset = stream->ReadSwapScalar();
    }
    if( fFollowFlags & kOffsetAng )
    {
        fTanOffset = tanf(fOffset);
    }
    if( fFollowFlags & kOffsetClamp )
    {
        fOffsetClamp = stream->ReadSwapScalar();
    }
    if( fFollowFlags & kSpeedClamp )
    {
        fSpeedClamp = stream->ReadSwapScalar();
    }
}

void plLineFollowMod::Write(hsStream* stream, hsResMgr* mgr)
{
    plMultiModifier::Write(stream, mgr);

    mgr->WriteCreatable(stream, fPath);

    mgr->WriteKey(stream, fPathParent); 

    mgr->WriteKey(stream, fRefObj); 

    stream->WriteSwap32(fStereizers.GetCount());
    int i;
    for( i = 0; i < fStereizers.GetCount(); i++ )
        mgr->WriteKey(stream, fStereizers[i]->GetKey());

    UInt32 f = UInt32(fFollowMode) | (UInt32(fFollowFlags) << 16);
    stream->WriteSwap32(f);

    if( fFollowFlags & kOffset )
        stream->WriteSwapScalar(fOffset);
    if( fFollowFlags & kOffsetClamp )
        stream->WriteSwapScalar(fOffsetClamp);
    if( fFollowFlags & kSpeedClamp )
        stream->WriteSwapScalar(fSpeedClamp);
}


#include "plProfile.h"
plProfile_CreateTimer("LineFollow", "RenderSetup", LineFollow);

hsBool plLineFollowMod::MsgReceive(plMessage* msg)
{
    plGenRefMsg* refMsg = plGenRefMsg::ConvertNoRef(msg);
    if( refMsg )
    {
        if( refMsg->GetContext() & (plRefMsg::kOnCreate|plRefMsg::kOnRequest|plRefMsg::kOnReplace) )
        {
            plSceneObject* obj = plSceneObject::ConvertNoRef(refMsg->GetRef());
            if( kRefParent == refMsg->fType )
                fPathParent = obj;
            else if( kRefObject == refMsg->fType )
                fRefObj = obj;
            else if( kRefStereizer == refMsg->fType )
            {
                plStereizer* ster = plStereizer::ConvertNoRef(refMsg->GetRef());
                int idx = fStereizers.Find(ster);
                if( idx == fStereizers.kMissingIndex )
                    fStereizers.Append(ster);
            }
        }
        else if( refMsg->GetContext() & (plRefMsg::kOnDestroy|plRefMsg::kOnRemove) )
        {
            if( kRefParent == refMsg->fType )
                fPathParent = nil;
            else if( kRefObject == refMsg->fType )
                fRefObj = nil;
            else if( kRefStereizer == refMsg->fType )
            {
                plStereizer* ster = (plStereizer*)(refMsg->GetRef());
                int idx = fStereizers.Find(ster);
                if( idx != fStereizers.kMissingIndex )
                    fStereizers.Remove(idx);
            }
        }
        return true;
    }
    plRenderMsg* rend = plRenderMsg::ConvertNoRef(msg);
    if( rend )
    {
        plProfile_BeginLap(LineFollow, this->GetKey()->GetUoid().GetObjectName());
        hsPoint3 oldPos = fSearchPos;
        fSearchPos = rend->Pipeline()->GetViewPositionWorld();
        ICheckForPop(oldPos, fSearchPos);
        plProfile_EndLap(LineFollow, this->GetKey()->GetUoid().GetObjectName());
        return true;
    }
    plListenerMsg* list = plListenerMsg::ConvertNoRef(msg);
    if( list )
    {
        hsPoint3 oldPos = fSearchPos;
        fSearchPos = list->GetPosition();
        ICheckForPop(oldPos, fSearchPos);

        ISetupStereizers(list);
        return true;
    }
    plPlayerPageMsg* pPMsg = plPlayerPageMsg::ConvertNoRef(msg);
    if (pPMsg)
    {
        if (pPMsg->fPlayer == plNetClientMgr::GetInstance()->GetLocalPlayerKey() && !pPMsg->fUnload)
        {
            fRefObj = (plSceneObject*)pPMsg->fPlayer->GetObjectPtr();
        }
        return true;
    }

    return plMultiModifier::MsgReceive(msg);
}

void plLineFollowMod::SetFollowMode(FollowMode f) 
{ 
    IUnRegister();
    fFollowMode = f; 
    IRegister();

    plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
}

void plLineFollowMod::IUnRegister()
{
    switch( fFollowMode )
    {
    case kFollowObject:
        break;
    case kFollowListener:
        plgDispatch::Dispatch()->UnRegisterForExactType(plListenerMsg::Index(), GetKey());
        break;
    case kFollowCamera:
        plgDispatch::Dispatch()->UnRegisterForExactType(plRenderMsg::Index(), GetKey());
        break;
    case kFollowLocalAvatar:
        plgDispatch::Dispatch()->UnRegisterForExactType(plPlayerPageMsg::Index(), GetKey());
        break;

    }
}

void plLineFollowMod::IRegister()
{
    switch( fFollowMode )
    {
    case kFollowObject:
        break;
    case kFollowListener:
        plgDispatch::Dispatch()->RegisterForExactType(plListenerMsg::Index(), GetKey());
        break;
    case kFollowCamera:
        plgDispatch::Dispatch()->RegisterForExactType(plRenderMsg::Index(), GetKey());
        break;
    case kFollowLocalAvatar:
        {   
            if (plNetClientApp::GetInstance() && plNetClientApp::GetInstance()->GetLocalPlayer())
                fRefObj = ((plSceneObject*)plNetClientApp::GetInstance()->GetLocalPlayer());
            plgDispatch::Dispatch()->RegisterForExactType(plPlayerPageMsg::Index(), GetKey());
            break;
        }
    }
}

hsBool plLineFollowMod::IEval(double secs, hsScalar del, UInt32 dirty)
{
    if( !fPath )
        return false;

    ISetPathTransform();

    if( !IGetSearchPos() )
        return false;

    hsMatrix44 tgtXfm;
    IGetTargetTransform(fSearchPos, tgtXfm);

    if( fFollowFlags & kOffset )
        IOffsetTargetTransform(tgtXfm);

    int i;
    for( i = 0; i < GetNumTargets(); i++ )
    {
        ISetTargetTransform(i, tgtXfm);
    }
    return true;
}

hsBool plLineFollowMod::IOffsetTargetTransform(hsMatrix44& tgtXfm)
{
    hsPoint3 tgtPos = tgtXfm.GetTranslate();

    hsVector3 tgt2src(&fSearchPos, &tgtPos);
    hsScalar t2sLen = tgt2src.Magnitude();
    hsFastMath::NormalizeAppr(tgt2src);

    hsVector3 out;
    out.Set(-tgt2src.fY, tgt2src.fX, 0); // (0,0,1) X (tgt2src)

    if( fFollowFlags & kOffsetAng )
    {
        hsScalar del = t2sLen * fTanOffset;
        if( fFollowFlags & kOffsetClamp ) 
        {
            if( del > fOffsetClamp )
                del = fOffsetClamp;
            else if( del < -fOffsetClamp )
                del = -fOffsetClamp;
        }
        out *= del;
    }
    else if( fFollowFlags & kOffsetFeet )
    {
        out *= fOffset;
    }
    else
        out.Set(0,0,0);

    if( fFollowFlags & kForceToLine )
    {
        hsPoint3 newSearch = tgtPos;
        newSearch += out;
        IGetTargetTransform(newSearch, tgtXfm);
    }
    else
    {
        tgtXfm.fMap[0][3] += out[0];
        tgtXfm.fMap[1][3] += out[1];
        tgtXfm.fMap[2][3] += out[2];
    }

    return true;
}

hsBool plLineFollowMod::IGetTargetTransform(hsPoint3& searchPos, hsMatrix44& tgtXfm)
{
    hsScalar t = fPath->GetExtremePoint(searchPos);
    if( fFollowFlags & kFullMatrix )
    {
        fPath->SetCurTime(t, plAnimPath::kNone);
        fPath->GetMatrix44(&tgtXfm);
    }
    else
    {
        fPath->SetCurTime(t, plAnimPath::kCalcPosOnly);
        hsPoint3 pos;
        fPath->GetPosition(&pos);
        tgtXfm.MakeTranslateMat((hsVector3*)&pos);
    }

    return true;
}

void plLineFollowMod::ISetPathTransform()
{
    if( fPathParent && fPathParent->GetCoordinateInterface() )
    {
        hsMatrix44 l2w = fPathParent->GetCoordinateInterface()->GetLocalToWorld();
        hsMatrix44 w2l = fPathParent->GetCoordinateInterface()->GetWorldToLocal();
        
        fPath->SetTransform(l2w, w2l);
    }
}

void plLineFollowMod::ICheckForPop(const hsPoint3& oldPos, const hsPoint3& newPos)
{
    hsVector3 del(&oldPos, &newPos);

    hsScalar elapsed = hsTimer::GetDelSysSeconds();
    hsScalar speedSq = 0.f;
    if (elapsed > 0.f)
        speedSq = del.MagnitudeSquared() / elapsed;

    const hsScalar kMaxSpeedSq = 30.f * 30.f; // (feet per sec)^2
    if( speedSq > kMaxSpeedSq )
        fFollowFlags |= kSearchPosPop;
    else
        fFollowFlags &= ~kSearchPosPop;
}

hsBool plLineFollowMod::IGetSearchPos()
{
    hsPoint3 oldPos = fSearchPos;
    if( kFollowObject == fFollowMode )
    {
        if( !fRefObj )
            return false;

        if( fRefObj->GetCoordinateInterface() )
        {
            fSearchPos = fRefObj->GetCoordinateInterface()->GetWorldPos();
            ICheckForPop(oldPos, fSearchPos);
            return true;
        }
        else if( fRefObj->GetDrawInterface() )
        {
            fSearchPos = fRefObj->GetDrawInterface()->GetWorldBounds().GetCenter();
            ICheckForPop(oldPos, fSearchPos);
            return true;
        }
        return false;
    }
    else 
    if (fFollowMode == kFollowLocalAvatar)
    {   
        if (!fRefObj)
            return false;
        if( fRefObj->GetCoordinateInterface() )
        {
            fSearchPos = fRefObj->GetCoordinateInterface()->GetWorldPos();
            ICheckForPop(oldPos, fSearchPos);
            return true;
        }
        else if( fRefObj->GetDrawInterface() )
        {
            fSearchPos = fRefObj->GetDrawInterface()->GetWorldBounds().GetCenter();
            ICheckForPop(oldPos, fSearchPos);
            return true;
        }
        return false;
    }
    return true;
}

hsMatrix44 plLineFollowMod::IInterpMatrices(const hsMatrix44& m0, const hsMatrix44& m1, hsScalar parm)
{
    hsMatrix44 retVal;
    int i, j;
    for( i = 0; i < 3; i++ )
    {
        for( j = 0; j < 4; j++ )
        {
            retVal.fMap[i][j] = m0.fMap[i][j] * (1.f - parm) + m1.fMap[i][j] * parm;
        }
    }
    retVal.fMap[3][0] = retVal.fMap[3][1] = retVal.fMap[3][2] = 0;
    retVal.fMap[3][3] = 1.f;
    retVal.NotIdentity();
    return retVal;
}

hsMatrix44 plLineFollowMod::ISpeedClamp(plCoordinateInterface* ci, const hsMatrix44& unclTgtXfm)
{
    // If our search position has popped, or delsysseconds is zero, just return as is.
    if( (fFollowFlags & kSearchPosPop) || !(hsTimer::GetDelSysSeconds() > 0) )
        return unclTgtXfm;

    const hsMatrix44 currL2W = ci->GetLocalToWorld();
    const hsPoint3 oldPos = currL2W.GetTranslate();
    const hsPoint3 newPos = unclTgtXfm.GetTranslate();
    const hsVector3 del(&newPos, &oldPos);
    hsScalar elapsed = hsTimer::GetDelSysSeconds();
    hsScalar speed = 0.f;
    if (elapsed > 0.f)
        speed = del.Magnitude() / elapsed;

    if( speed > fSpeedClamp )
    {
        hsScalar parm = fSpeedClamp / speed;

        hsMatrix44 clTgtXfm = IInterpMatrices(currL2W, unclTgtXfm, parm);

        return clTgtXfm;
    }

    return unclTgtXfm;
}

void plLineFollowMod::ISetTargetTransform(int iTarg, const hsMatrix44& unclTgtXfm)
{
    plCoordinateInterface* ci = IGetTargetCoordinateInterface(iTarg);
    if( ci )
    {
        hsMatrix44 tgtXfm = fFollowFlags & kSpeedClamp ? ISpeedClamp(ci, unclTgtXfm) : unclTgtXfm;
        if( fFollowFlags & kFullMatrix )
        {
            // This branch currently never gets taken. If it ever does,
            // we should probably optimize out this GetInverse() (depending
            // on how often it gets taken).
            const hsMatrix44& l2w = tgtXfm;
            hsMatrix44 w2l;
            l2w.GetInverse(&w2l);

            ci->SetTransform(l2w, w2l);
        }
        else
        {
            hsMatrix44 l2w = ci->GetLocalToWorld();
            hsMatrix44 w2l = ci->GetWorldToLocal();

            hsPoint3 pos = tgtXfm.GetTranslate();
            hsPoint3 oldPos = l2w.GetTranslate();
            
            l2w.SetTranslate(&pos);

            hsMatrix44 xlate;
            xlate.Reset();
            xlate.SetTranslate(&oldPos);
            w2l = w2l * xlate;
            xlate.SetTranslate(&-pos);
            w2l = w2l * xlate;

            ci->SetTransform(l2w, w2l);
        }
        hsPoint3 newPos = tgtXfm.GetTranslate();
        int i;
        for( i = 0; i < fStereizers.GetCount(); i++ )
        {
            if( fStereizers[i] )
            {
                fStereizers[i]->SetWorldInitPos(newPos);
                fStereizers[i]->Stereize();
            }
        }
    }
}

void plLineFollowMod::ISetupStereizers(const plListenerMsg* listMsg)
{
    int i;
    for( i = 0; i < fStereizers.GetCount(); i++ )
    {
        if( fStereizers[i] )
            fStereizers[i]->SetFromListenerMsg(listMsg);
    }
}

void plLineFollowMod::AddTarget(plSceneObject* so)
{
    plMultiModifier::AddTarget(so);

    if( so )
        plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
}

void plLineFollowMod::RemoveTarget(plSceneObject* so)
{
    plMultiModifier::RemoveTarget(so);
}

void plLineFollowMod::AddStereizer(const plKey& key)
{
    hsgResMgr::ResMgr()->SendRef(plKey(key), TRACKED_NEW plGenRefMsg(GetKey(), plRefMsg::kOnCreate, 0, kRefStereizer), plRefFlags::kPassiveRef);
}

void plLineFollowMod::RemoveStereizer(const plKey& key)
{
    hsgResMgr::ResMgr()->SendRef(plKey(key), TRACKED_NEW plGenRefMsg(GetKey(), plRefMsg::kOnRemove, 0, kRefStereizer), plRefFlags::kPassiveRef);
}

// derived version of this class for rail cameras
// the difference is the rail camera just calculates 
// the desired position but does not move the target to
// it.

plRailCameraMod::plRailCameraMod() :
fCurrentTime(0.0f),
fTargetTime(0.0f),
fFarthest(false)
{
    plLineFollowMod::plLineFollowMod();
    fGoal.Set(0,0,0);
}

plRailCameraMod::~plRailCameraMod()
{
}

hsBool  plRailCameraMod::IGetTargetTransform(hsPoint3& searchPos, hsMatrix44& tgtXfm)
{
    if (fPath->GetFarthest())
    {   
        fFarthest = true;
        fPath->SetFarthest(false);
    }
    fTargetTime = fPath->GetExtremePoint(searchPos);
    fPath->SetCurTime(fTargetTime, plAnimPath::kCalcPosOnly);
    hsPoint3 pos;
    fPath->GetPosition(&pos);
    tgtXfm.MakeTranslateMat((hsVector3*)&pos);
    
    return true;
}

hsPoint3 plRailCameraMod::GetGoal(double secs, hsScalar speed)
{
    hsScalar delTime;
    int dir;
    if (fTargetTime == fCurrentTime)
        return fGoal;

    if (fTargetTime > fCurrentTime)
    {   
        dir = 1;
        delTime = fTargetTime - fCurrentTime;
    }
    else
    {   
        dir = -1;
        delTime = fCurrentTime - fTargetTime;
    }
    if (fPath->GetWrap() && delTime > fPath->GetLength() * 0.5f)
        dir *= -1;
    
    if (delTime <= (secs * speed))
        fCurrentTime = fTargetTime;
    else
        fCurrentTime += (hsScalar)((secs * speed) * dir);

    if (fPath->GetWrap())
    {
        if (fCurrentTime > fPath->GetLength())
            fCurrentTime = (fCurrentTime - fPath->GetLength());
        else
        if (fCurrentTime < 0.0f)
            fCurrentTime = fPath->GetLength() - fCurrentTime;
    }
    if (fFarthest)
        fPath->SetCurTime((fPath->GetLength() - fCurrentTime), plAnimPath::kCalcPosOnly);
    else
        fPath->SetCurTime(fCurrentTime, plAnimPath::kCalcPosOnly);
    
    fPath->GetPosition(&fGoal);
    
    fPath->SetCurTime(fTargetTime, plAnimPath::kCalcPosOnly);
    
    return fGoal;
}