f612924a45
copy constructor which takes an optional Cloner object, and the old osg::Object::clone() has changed so that it now requires a Cloner as paramter. This is passed on to the copy constructor to help control the shallow vs deep copying. The old functionality of clone() which was clone of type has been renamed to cloneType(). Updated all of the OSG to work with these new conventions, implemention all the required copy constructors etc. A couple of areas will do shallow copies by design, a couple of other still need to be updated to do either shallow or deep. Neither of the shallow or deep copy operations have been tested yet, only the old functionality of the OSG has been checked so far, such running the viewer on various demo datasets. Also fixed a problem in osg::Optimize::RemoveRendundentNodesVisitor which was not checking that Group didn't have have any attached StateSet's, Callbacks or UserData. These checks have now been added, which fixes a bug which was revealled by the new osgscribe demo, this related to removal of group acting as state decorator. method
77 lines
2.8 KiB
Plaintext
77 lines
2.8 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSG_OBJECT
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#define OSG_OBJECT 1
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#include <osg/Referenced>
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#include <osg/ShallowCopy>
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namespace osg {
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/** META_Object macro define the standard clone, isSameKindAs and className methods.
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* Use when subclassing from Object to make it more convinient to define
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* the standard pure virtual clone, isSameKindAs and className methods
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* which are required for all Object subclasses.*/
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#define META_Object(T) \
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virtual osg::Object* cloneType() const { return new T (); } \
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virtual osg::Object* clone(const osg::Cloner& cloner) const { return new T (*this,cloner); } \
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const T *>(obj)!=NULL; } \
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virtual const char* className() const { return #T; }
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/** Base class/standard interface for objects which require IO support,
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cloning and reference counting.
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Based on GOF Composite, Prototype and Template Method patterns.
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*/
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class SG_EXPORT Object : public Referenced
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{
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public:
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/** Construct an object. Note Object is a pure virtual base class
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and therefore cannot be constructed on its own, only derived
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classes which override the clone and className methods are
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concrete classes and can be constructed.*/
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Object() {}
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/** Copy constructor, optional Cloner object can be used to control
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* shallow vs deep copying of dynamic data.*/
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Object(const Object&,const Cloner& cloner=ShallowCopy());
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/** Clone the type of an object, with Object* return type.
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Must be defined by derived classes.*/
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virtual Object* cloneType() const = 0;
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/** Clone the an object, with Object* return type.
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Must be defined by derived classes.*/
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virtual Object* clone(const Cloner&) const = 0;
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virtual bool isSameKindAs(const Object*) const { return true; }
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/** return the name of the object's class type. Must be defined
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by derived classes.*/
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virtual const char* className() const = 0;
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protected:
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/** Object destructor. Note, is protected so that Objects cannot
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be deleted other than by being dereferenced and the reference
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count being zero (see osg::Referenced), preventing the deletion
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of nodes which are still in use. This also means that
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Node's cannot be created on stack i.e Node node will not compile,
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forcing all nodes to be created on the heap i.e Node* node
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= new Node().*/
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virtual ~Object() {}
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private:
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/** disallow any copy operator.*/
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Object& operator = (const Object&) { return *this; }
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};
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};
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#endif
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