CWE-ou-minkata/Sources/Plasma/PubUtilLib/plIntersect/plSoftVolume.cpp

/*==LICENSE==*

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

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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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
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*==LICENSE==*/

#include "hsTypes.h"
#include "hsStream.h"

#include "plSoftVolume.h"

#include "plgDispatch.h"
#include "plMessage/plListenerMsg.h"

plSoftVolume::plSoftVolume() 
:   fListenState(0),
    fListenStrength(0),
    fInsideStrength(1.f),
    fOutsideStrength(0)
{
    fListenPos.Set(0,0,0);
}

plSoftVolume::~plSoftVolume()
{
}

void plSoftVolume::Read(hsStream* s, hsResMgr* mgr)
{
    plRegionBase::Read(s, mgr);

    fListenState = s->ReadSwap32();

    SetCheckListener(0 != (fListenState & kListenCheck));

    fInsideStrength = s->ReadSwapScalar();
    fOutsideStrength = s->ReadSwapScalar();
}

void plSoftVolume::Write(hsStream* s, hsResMgr* mgr)
{
    plRegionBase::Write(s, mgr);

    s->WriteSwap32(fListenState);

    s->WriteSwapScalar(fInsideStrength);
    s->WriteSwapScalar(fOutsideStrength);
}

hsScalar plSoftVolume::GetStrength(const hsPoint3& pos) const 
{ 
    return IRemapStrength(IGetStrength(pos));
}

hsScalar plSoftVolume::GetListenerStrength() const
{
    if( !(fListenState & kListenPosSet) )
    {
        // Some screw-up, haven't received a pos yet. Turn it off till we do.
        return fListenStrength = IRemapStrength(0);
    }
    if( fListenState & kListenDirty )
    {
        fListenStrength = IUpdateListenerStrength();
        fListenState &= ~kListenDirty;
    }
    return fListenStrength;
}

void plSoftVolume::UpdateListenerPosition(const hsPoint3& pos)
{
    fListenPos = pos;
    fListenState |= kListenDirty | kListenPosSet;
}

void plSoftVolume::SetCheckListener(hsBool on)
{
    if( on )
    {
        plgDispatch::Dispatch()->RegisterForExactType(plListenerMsg::Index(), GetKey());
        fListenState |= kListenCheck | kListenDirty | kListenRegistered;
    }
    else
    {
        plgDispatch::Dispatch()->UnRegisterForExactType(plListenerMsg::Index(), GetKey());
        fListenState &= ~(kListenCheck | kListenDirty | kListenRegistered);
    }
}

hsBool plSoftVolume::MsgReceive(plMessage* msg)
{
    plListenerMsg* list = plListenerMsg::ConvertNoRef(msg);
    if( list )
    {
        UpdateListenerPosition(list->GetPosition());
        return true;
    }

    return plRegionBase::MsgReceive(msg);
}

hsScalar plSoftVolume::IUpdateListenerStrength() const
{
    return fListenStrength = GetStrength(fListenPos);
}

void plSoftVolume::SetInsideStrength(hsScalar s)
{
    if( s < 0 )
        s = 0;
    else if( s > 1.f )
        s = 1.f;
    fInsideStrength = s;
}

void plSoftVolume::SetOutsideStrength(hsScalar s)
{
    if( s < 0 )
        s = 0;
    else if( s > 1.f )
        s = 1.f;
    fOutsideStrength = s;
}