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Documentation                       Search   mot.h Go to the documentation of this file. /* Copyright, 2000 Nevrax Ltd. * * This file is part of NEVRAX NEL. * NEVRAX NEL 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 2, or (at your option) * any later version. * NEVRAX NEL 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 NEVRAX NEL; see the file COPYING. If not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, * MA 02111-1307, USA. */ #ifndef NL_MOT_H #define NL_MOT_H #include "nel/misc/types_nl.h" #include "nel/misc/smart_ptr.h" #include "nel/misc/bit_set.h" #include "nel/misc/class_id.h" #include <vector> #include <set> #include <map> namespace NLMISC { class IStream; } namespace NL3D { class IModel; class IObs; class ITrav; // *************************************************************************** class CMOT { public: // Ctor. CMOT(); // Dtor. virtual ~CMOT(); static void registerModel(const NLMISC::CClassId &idModel, const NLMISC::CClassId &idModelBase, IModel* (*creator)()); static void registerObs(const NLMISC::CClassId &idTrav, const NLMISC::CClassId &idModel, IObs* (*creator)()); public: void addTrav(ITrav *v); uint getNumTrav() const { return Traversals.size(); } ITrav *getTrav(uint index) const { nlassert(index < Traversals.size()); return Traversals[index].Trav; } ITrav *getTrav(const NLMISC::CClassId &idTrav) const; public: IModel *createModel(const NLMISC::CClassId &idModel); void deleteModel(IModel *model); void validateModels(); virtual void release(); // ****************** private: struct CModelEntry { NLMISC::CClassId ModelId, BaseModelId; IModel* (*Creator)(); bool operator<(const CModelEntry& o) const {return ModelId<o.ModelId;} bool operator==(const CModelEntry& o) const {return ModelId==o.ModelId;} bool operator!=(const CModelEntry& o) const {return !(*this==o);} }; struct CObsEntry { NLMISC::CClassId TravId, ModelId; IObs* (*Creator)(); bool operator<(const CObsEntry& o) const { if(TravId!=o.TravId) return TravId<o.TravId; else return ModelId<o.ModelId; } bool operator==(const CObsEntry& o) const { return ModelId==o.ModelId && TravId==o.TravId; } bool operator!=(const CObsEntry& o) const {return !(*this==o);} }; struct CTravEntry { NLMISC::CClassId TravId; ITrav *Trav; }; private: // must do this for _ValidateModelList access. friend class IModel; std::vector<CTravEntry> Traversals; std::set<IModel*> Models; IModel *_ValidateModelList; static std::set<CModelEntry> RegModels; static std::set<CObsEntry> RegObservers; private: // Create an observer, obeying the hierachy/observer system explained in createModel(). IObs *createObs(const ITrav *trav, const NLMISC::CClassId &idModel) const; protected: // For hertied class, to access observer result of a model. IObs *getModelObs(IModel *m, const NLMISC::CClassId &idTrav) const; private: // a dummy method, usefull for dynamic_cast only. virtual void dummyForDynamicCast() {} }; // *************************************************************************** class IModel : public NLMISC::CRefCount { protected: IModel(); virtual void initModel() { } virtual ~IModel(); public: enum TDirty { Dirty=0, // First bit, to say that the Model is dirty. Last }; NLMISC::CBitSet TouchObs; void foul(uint flag) { TouchObs.set(Dirty); TouchObs.set(flag); } void validate(); protected: // Observers created and linked by CMOT::createModel() friend class CMOT; friend class IObs; friend class ITrav; typedef std::map<NLMISC::CClassId, IObs*> CObsMap; CObsMap Observers; // Cache the last observer acceded through getObs(). mutable NLMISC::CClassId LastClassId; mutable IObs *LastObs; IObs *getObs(const NLMISC::CClassId &idTrav) const; // A link to the CMOT which created us, filled in createModel(). CMOT *_OwnerMot; // linked list of models to validate. IModel *_PrecModelToValidate; IModel *_NextModelToValidate; protected: virtual void update() { } virtual void cleanTouch() { TouchObs.clearAll(); } // for CMOT::createModel() and for CTransform::freezeHRC() only. void linkToValidateList(); void unlinkFromValidateList(); }; // *************************************************************************** class IObs : public NLMISC::CRefCount { public: IModel *Model; // The model for this observer. ITrav *Trav; // The traversal for this observer. public: IObs(); virtual ~IObs(); virtual void init() {} virtual bool isTreeNode() {return true;} virtual void addChild(IObs *son); virtual void delChild(IObs *son); virtual void addParent(IObs *father); virtual void delParent(IObs *father); sint getNumChildren() const {return NumSons;} IObs *getFirstChild() const { if(NumSons==0) return 0; CurSonIt= SonList.begin(); nlassert(CurSonIt!=SonList.end()); return (*CurSonIt); } IObs *getNextChild() const { nlassert(CurSonIt!=SonList.end()); CurSonIt++; if(CurSonIt==SonList.end()) return NULL; else return (*CurSonIt); } sint getNumParents() const {return NumFathers;} IObs *getFirstParent() const { if(NumFathers==0) return 0; CurFatherIt= FatherList.begin(); nlassert(CurFatherIt!=FatherList.end()); return (*CurFatherIt); } IObs *getNextParent() const { nlassert(CurFatherIt!=FatherList.end()); CurFatherIt++; if(CurFatherIt==FatherList.end()) return NULL; else return (*CurFatherIt); } virtual void traverse(IObs *caller)=0; virtual void update() { } void traverseSons() { for(IObs *c= getFirstChild(); c!=NULL; c= getNextChild()) { c->traverse(this); } } IObs *getObs(const NLMISC::CClassId &idTrav) const; protected: typedef std::list<IObs*> TObsList; typedef TObsList::iterator ItObsList; typedef TObsList::const_iterator ConstItObsList; typedef std::map<IObs *, ItObsList> TObsMap; typedef TObsMap::iterator ItObsMap; // separate in list/set, to have o(1) lookup, and o(logn) insertion/erase. TObsList SonList; TObsList FatherList; TObsMap SonMap; TObsMap FatherMap; sint NumFathers; sint NumSons; mutable ConstItObsList CurSonIt; mutable ConstItObsList CurFatherIt; }; // *************************************************************************** class ITrav : public NLMISC::CRefCount { public: ITrav() {Root=NULL;} virtual ~ITrav() {Root= NULL;} virtual IObs *createDefaultObs() const =0; virtual NLMISC::CClassId getClassId() const =0; virtual void addedToMOT(CMOT *mot) {} void setRoot(IModel *root); IModel *getRoot() const; void link(IModel *m1, IModel *m2) const; void unlink(IModel *m1, IModel *m2) const; void moveChildren(IModel *parentFrom, IModel *parentTo) const; void copyChildren(IModel *parentFrom, IModel *parentTo) const; sint getNumChildren(IModel *m) const; IModel *getFirstChild(IModel *m) const; IModel *getNextChild(IModel *m) const; sint getNumParents(IModel *m) const; IModel *getFirstParent(IModel *m) const; IModel *getNextParent(IModel *m) const; protected: // The root observer. NLMISC::CRefPtr<IObs> Root; }; } #endif // NL_MOT_H /* End of mot.h */