khanat-code-old/code/nel/tools/3d/object_viewer/dup_ps.cpp

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2011-04-29 17:15:53 +00:00
// 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 "std_afx.h"
#include "nel/3d/ps_located.h"
#include "nel/3d/particle_system.h"
#include "nel/misc/stream.h"
#include "nel/misc/mem_stream.h"
#include "dup_ps.h"
#include <memory>
using namespace NL3D;
//=======================================================================
/** This can duplicate any serializable type by using a serialization policy (polymorphic, non polymorphic ..)
* The serialization policy must have a method to serial a pointer on the object (see example below)
* NB : of course this is slow (but convenient) way of performing a copy
* TODO maybe this could be used elsewhere ?
*/
template <class TSerializePolicy, typename T>
static T *DupSerializable(const T *in) throw(NLMISC::EStream)
{
NLMISC::CMemStream ms;
nlassert(!ms.isReading());
T *nonConstIn = const_cast<T *>(in);
TSerializePolicy::serial(nonConstIn, ms);
std::vector<uint8> datas(ms.length());
std::copy(ms.buffer(), ms.buffer() + ms.length(), datas.begin());
ms.resetPtrTable();
ms.invert();
ms.fill(&datas[0], (uint32)datas.size());
nlassert(ms.isReading());
T *newObj = NULL;
TSerializePolicy::serial(newObj, ms);
return newObj;
}
/** A policy to duplicate a non-polymorphic type
*/
struct CDupObjPolicy
{
template <typename T>
static void serial(T *&obj, NLMISC::IStream &dest) throw(NLMISC::EStream)
{
dest.serialPtr(obj);
/*if (dest.isReading())
{
std::auto_ptr<T> newObj(new T);
newObj->serialPtr(dest);
delete obj;
obj = newObj.release();
}
else
{
obj->serial(dest);
}*/
}
};
/** A policy to duplicate a polymorphic type
*/
struct CDupPolymorphicObjPolicy
{
template <typename T>
static void serial(T *&obj, NLMISC::IStream &dest) throw(NLMISC::EStream)
{
dest.serialPolyPtr(obj);
}
};
//=======================================================================
/////////////////////////////////////////
// temp until there is a clone method //
/////////////////////////////////////////
NL3D::CParticleSystemProcess *DupPSLocated(const CParticleSystemProcess *in)
{
if (!in) return NULL;
try
{
// if the located doesn't belon to a system, copy it direclty
if (in->getOwner() == NULL)
{
return DupSerializable<CDupPolymorphicObjPolicy>(in);
}
else
{
uint index = in->getOwner()->getIndexOf(*in);
/** Duplicate the system, and detach.
* We can't duplicate the object direclty (it may be referencing other objects in the system, so these objects will be copied too...)
*/
std::auto_ptr<CParticleSystem> newPS(DupSerializable<CDupObjPolicy>(in->getOwner()));
// scene pointer is not serialised, but 'detach' may need the scene to be specified
newPS->setScene(in->getOwner()->getScene());
return newPS->detach(index);
}
}
catch (NLMISC::EStream &e)
{
nlwarning (e.what());
return NULL;
}
}
//=======================================================================
/////////////////////////////////////////
// temp until there is a clone method //
/////////////////////////////////////////
NL3D::CPSLocatedBindable *DupPSLocatedBindable(CPSLocatedBindable *in)
{
if (!in) return NULL;
try
{
// if no owner, can copy the object directy
if (in->getOwner() == NULL)
{
return DupSerializable<CDupPolymorphicObjPolicy>(in);
}
else
{
CParticleSystem *srcPS = in->getOwner()->getOwner();
std::auto_ptr<CParticleSystem> newPS(DupSerializable<CDupObjPolicy>(srcPS));
// scene pointer is not serialised, but 'detach' may need the scene to be specified
newPS->setScene(in->getOwner()->getOwner()->getScene());
//
uint index = srcPS->getIndexOf(*(in->getOwner()));
uint subIndex = in->getOwner()->getIndexOf(in);
//
newPS->setScene(in->getOwner()->getScene()); // 'unbind' require the scene to be attached
CPSLocated *loc = NLMISC::safe_cast<CPSLocated *>(newPS->getProcess(index));
return loc->unbind(subIndex);
}
}
catch (NLMISC::EStream &e)
{
nlwarning (e.what());
return NULL;
}
}