/*==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 "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;
}