162 lines
4.7 KiB
C++
162 lines
4.7 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "std_afx.h"
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#include "nel/3d/ps_located.h"
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#include "nel/3d/particle_system.h"
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#include "nel/misc/stream.h"
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#include "nel/misc/mem_stream.h"
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#include "dup_ps.h"
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#include <memory>
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using namespace NL3D;
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//=======================================================================
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/** This can duplicate any serializable type by using a serialization policy (polymorphic, non polymorphic ..)
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* The serialization policy must have a method to serial a pointer on the object (see example below)
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* NB : of course this is slow (but convenient) way of performing a copy
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* TODO maybe this could be used elsewhere ?
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*/
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template <class TSerializePolicy, typename T>
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static T *DupSerializable(const T *in) throw(NLMISC::EStream)
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{
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NLMISC::CMemStream ms;
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nlassert(!ms.isReading());
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T *nonConstIn = const_cast<T *>(in);
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TSerializePolicy::serial(nonConstIn, ms);
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std::vector<uint8> datas(ms.length());
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std::copy(ms.buffer(), ms.buffer() + ms.length(), datas.begin());
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ms.resetPtrTable();
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ms.invert();
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ms.fill(&datas[0], (uint32)datas.size());
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nlassert(ms.isReading());
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T *newObj = NULL;
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TSerializePolicy::serial(newObj, ms);
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return newObj;
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}
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/** A policy to duplicate a non-polymorphic type
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*/
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struct CDupObjPolicy
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{
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template <typename T>
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static void serial(T *&obj, NLMISC::IStream &dest) throw(NLMISC::EStream)
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{
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dest.serialPtr(obj);
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/*if (dest.isReading())
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{
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std::auto_ptr<T> newObj(new T);
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newObj->serialPtr(dest);
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delete obj;
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obj = newObj.release();
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}
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else
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{
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obj->serial(dest);
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}*/
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}
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};
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/** A policy to duplicate a polymorphic type
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*/
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struct CDupPolymorphicObjPolicy
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{
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template <typename T>
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static void serial(T *&obj, NLMISC::IStream &dest) throw(NLMISC::EStream)
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{
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dest.serialPolyPtr(obj);
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}
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};
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//=======================================================================
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/////////////////////////////////////////
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// temp until there is a clone method //
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/////////////////////////////////////////
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NL3D::CParticleSystemProcess *DupPSLocated(const CParticleSystemProcess *in)
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{
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if (!in) return NULL;
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try
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{
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// if the located doesn't belon to a system, copy it direclty
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if (in->getOwner() == NULL)
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{
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return DupSerializable<CDupPolymorphicObjPolicy>(in);
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}
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else
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{
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uint index = in->getOwner()->getIndexOf(*in);
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/** Duplicate the system, and detach.
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* We can't duplicate the object direclty (it may be referencing other objects in the system, so these objects will be copied too...)
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*/
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std::auto_ptr<CParticleSystem> newPS(DupSerializable<CDupObjPolicy>(in->getOwner()));
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// scene pointer is not serialised, but 'detach' may need the scene to be specified
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newPS->setScene(in->getOwner()->getScene());
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return newPS->detach(index);
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}
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}
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catch (NLMISC::EStream &e)
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{
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nlwarning (e.what());
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return NULL;
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}
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}
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//=======================================================================
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/////////////////////////////////////////
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// temp until there is a clone method //
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/////////////////////////////////////////
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NL3D::CPSLocatedBindable *DupPSLocatedBindable(CPSLocatedBindable *in)
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{
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if (!in) return NULL;
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try
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{
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// if no owner, can copy the object directy
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if (in->getOwner() == NULL)
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{
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return DupSerializable<CDupPolymorphicObjPolicy>(in);
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}
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else
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{
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CParticleSystem *srcPS = in->getOwner()->getOwner();
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std::auto_ptr<CParticleSystem> newPS(DupSerializable<CDupObjPolicy>(srcPS));
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// scene pointer is not serialised, but 'detach' may need the scene to be specified
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newPS->setScene(in->getOwner()->getOwner()->getScene());
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//
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uint index = srcPS->getIndexOf(*(in->getOwner()));
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uint subIndex = in->getOwner()->getIndexOf(in);
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//
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newPS->setScene(in->getOwner()->getScene()); // 'unbind' require the scene to be attached
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CPSLocated *loc = NLMISC::safe_cast<CPSLocated *>(newPS->getProcess(index));
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return loc->unbind(subIndex);
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}
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}
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catch (NLMISC::EStream &e)
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{
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nlwarning (e.what());
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return NULL;
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}
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}
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