// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "StdAfx.h"
#include "nel/3d/particle_system_model.h"
#include "nel/3d/particle_system_shape.h"
#include "nel/misc/path.h"
#include "export_appdata.h"
#include "export_nel.h"


using namespace NL3D;

IShape* CExportNel::buildParticleSystem(INode& node, TimeValue time)
{
	ObjectState os = node.EvalWorldState(time);
    Object *obj = os.obj;
	nlassert(obj);
	std::string shapeName;
	// try to get the complete path	
	if (!CExportNel::getValueByNameUsingParamBlock2(node, "ps_file_name", (ParamType2) TYPE_STRING, &shapeName, 0))
	{
		// if not found, get from the APP_DATAS
		shapeName = CExportNel::getNelObjectName(node);
		if (shapeName.empty()) return NULL;
		shapeName = NLMISC::CPath::lookup("shapeName", false);
		if (shapeName.empty()) return NULL;
	}
	
	//
	
	if (!shapeName.empty())
	{											
		NL3D::CShapeStream ss;
		NLMISC::CIFile iF;
		if (iF.open(shapeName.c_str()))
		{
			iF.serial(ss);
			if (!dynamic_cast<CParticleSystemShape *>(ss.getShapePointer()))
			{
				mprintf("Error : Object shape %s isn't a particle system", shapeName.c_str());
				return NULL;
			}

			CParticleSystemShape *pss = static_cast<CParticleSystemShape *>(ss.getShapePointer());

			// ********************************
			// *** Export default transformation
			// ********************************

			// Get the node matrix
			Matrix3 localTM;
			getLocalMatrix (localTM, node, time);

			// Get the translation, rotation, scale of the node
			CVector pos, scale;
			CQuat rot;
			decompMatrix (scale, rot, pos, localTM);

			// Set the default values
			pss->getDefaultPos()->setDefaultValue(pos);					
			pss->getDefaultScale()->setDefaultValue(scale);					
			pss->getDefaultRotQuat()->setDefaultValue(rot);												
			return pss;
		}
		else
		{
			mprintf("Error : Can't find %s while exporting a particle system \n", shapeName.c_str());
			return NULL;
		}				
	}
	return NULL;
}