c703f39459
Refactored original UserData and Descriptions strings to be managed alongside the new user object suppport within a single osg::Object::UserDataContainer.
336 lines
12 KiB
C++
336 lines
12 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library 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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* OpenSceneGraph Public License for more details.
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*/
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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/CopyOp>
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#include <osg/ref_ptr>
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#include <osg/Notify>
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#include <string>
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#include <vector>
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namespace osg {
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// forward declare
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class State;
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#define _ADDQUOTES(def) #def
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#define ADDQUOTES(def) _ADDQUOTES(def)
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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 convenient 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(library,name) \
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virtual osg::Object* cloneType() const { return new name (); } \
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virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new name (*this,copyop); } \
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const name *>(obj)!=NULL; } \
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virtual const char* libraryName() const { return #library; }\
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virtual const char* className() const { return #name; }
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template<typename T>
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T* clone(const T* t, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY)
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{
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if (t)
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{
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osg::ref_ptr<osg::Object> obj = t->clone(copyop);
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T* ptr = dynamic_cast<T*>(obj.get());
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if (ptr)
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{
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obj.release();
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return ptr;
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}
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else
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{
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OSG_WARN<<"Warning: osg::clone(const T*, osg::CopyOp&) cloned object not of type T, returning NULL."<<std::endl;
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return 0;
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}
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}
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else
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{
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OSG_WARN<<"Warning: osg::clone(const T*, osg::CopyOp&) passed null object to clone, returning NULL."<<std::endl;
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return 0;
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}
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}
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template<typename T>
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T* clone(const T* t, const std::string& name, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY)
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{
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T* newObject = osg::clone(t, copyop);
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if (newObject)
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{
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newObject->setName(name);
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return newObject;
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}
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else
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{
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OSG_WARN<<"Warning: osg::clone(const T*, const std::string&, const osg::CopyOp) passed null object to clone, returning NULL."<<std::endl;
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return 0;
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}
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}
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template<typename T>
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T* cloneType(const T* t)
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{
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if (t)
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{
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osg::ref_ptr<osg::Object> obj = t->cloneType();
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T* ptr = dynamic_cast<T*>(obj.get());
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if (ptr)
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{
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obj.release();
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return ptr;
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}
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else
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{
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OSG_WARN<<"Warning: osg::cloneType(const T*) cloned object not of type T, returning NULL."<<std::endl;
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return 0;
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}
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}
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else
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{
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OSG_WARN<<"Warning: osg::cloneType(const T*) passed null object to clone, returning NULL."<<std::endl;
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return 0;
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}
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}
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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 OSG_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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inline Object():Referenced(),_dataVariance(UNSPECIFIED) {}
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inline explicit Object(bool threadSafeRefUnref):Referenced(threadSafeRefUnref),_dataVariance(UNSPECIFIED) {}
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/** Copy constructor, optional CopyOp 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 CopyOp& copyop=CopyOp::SHALLOW_COPY);
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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 an object, with Object* return type.
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Must be defined by derived classes.*/
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virtual Object* clone(const CopyOp&) 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 library. Must be defined
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by derived classes. The OpenSceneGraph convention is that the
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namespace of a library is the same as the library name.*/
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virtual const char* libraryName() const = 0;
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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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/** Set whether to use a mutex to ensure ref() and unref() are thread safe.*/
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virtual void setThreadSafeRefUnref(bool threadSafe);
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/** Set the name of object using C++ style string.*/
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virtual void setName( const std::string& name ) { _name = name; }
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/** Set the name of object using a C style string.*/
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inline void setName( const char* name )
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{
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if (name) setName(std::string(name));
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else setName(std::string());
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}
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/** Get the name of object.*/
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inline const std::string& getName() const { return _name; }
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enum DataVariance
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{
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DYNAMIC,
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STATIC,
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UNSPECIFIED
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};
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/** Set the data variance of this object.
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* Can be set to either STATIC for values that do not change over the lifetime of the object,
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* or DYNAMIC for values that vary over the lifetime of the object. The DataVariance value
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* can be used by routines such as optimization codes that wish to share static data.
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* UNSPECIFIED is used to specify that the DataVariance hasn't been set yet. */
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inline void setDataVariance(DataVariance dv) { _dataVariance = dv; }
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/** Get the data variance of this object.*/
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inline DataVariance getDataVariance() const { return _dataVariance; }
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/** Compute the DataVariance based on an assessment of callback etc.*/
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virtual void computeDataVariance() {}
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/**
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* Set user data, data must be subclassed from Referenced to allow
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* automatic memory handling. If your own data isn't directly
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* subclassed from Referenced then create an adapter object
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* which points to your own object and handles the memory addressing.
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*/
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void setUserData(Referenced* obj);
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/** Get user data.*/
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Referenced* getUserData();
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/** Get const user data.*/
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const Referenced* getUserData() const;
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/** Add user data object.*/
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void addUserObject(Object* obj);
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/** Add element to list of user data objects.*/
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void setUserObject(unsigned int i, Object* obj);
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/** Remove element from the list of user data objects.*/
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void removeUserObject(unsigned int i);
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/** Get the index position of specified user data object.*/
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unsigned int getUserObjectIndex(const osg::Object* obj) const;
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/** Get the index position of first user data object that matches specified name.*/
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unsigned int getUserObjectIndex(const std::string& name) const;
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/** Get user data object as specified index position. */
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Object* getUserObject(unsigned int i);
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/** Get const user data object as specified index position. */
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const Object* getUserObject(unsigned int i) const;
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/** Get first user data object with specified name. */
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Object* getUserObject(const std::string& name);
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/** Get first const user data object with specified name. */
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const Object* getUserObject(const std::string& name) const;
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/** Get number of user objects assigned to this object.*/
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unsigned int getNumUserObjects() const;
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/** Convinience method that casts the named UserObject to osg::TemplateValueObject<T> and gets the value.
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* To use this template method you need to include the osg/ValueObject header.*/
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template<typename T>
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bool getUserValue(const std::string& name, T& value) const;
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/** Convinience method that creates the osg::TemplateValueObject<T> to store the
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* specified value and adds it as a named UserObject.
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* To use this template method you need to include the osg/ValueObject header. */
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template<typename T>
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void setUserValue(const std::string& name, const T& value);
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/** A vector of std::string's which are used to describe the object.*/
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typedef std::vector<std::string> DescriptionList;
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/** Set the list of string descriptions.*/
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void setDescriptions(const DescriptionList& descriptions);
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/** Get the description list of the node.*/
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DescriptionList& getDescriptions();
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/** Get the const description list of the const node.*/
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const DescriptionList& getDescriptions() const;
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/** Get a single const description of the const node.*/
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const std::string& getDescription(unsigned int i) const;
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/** Get a single description of the node.*/
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std::string& getDescription(unsigned int i);
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/** Get the number of descriptions of the node.*/
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unsigned int getNumDescriptions() const;
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/** Add a description string to the node.*/
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void addDescription(const std::string& desc);
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/** Resize any per context GLObject buffers to specified size. */
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virtual void resizeGLObjectBuffers(unsigned int /*maxSize*/) {}
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/** If State is non-zero, this function releases any associated OpenGL objects for
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* the specified graphics context. Otherwise, releases OpenGL objects
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* for all graphics contexts. */
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virtual void releaseGLObjects(osg::State* = 0) const {}
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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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Nodes 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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std::string _name;
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DataVariance _dataVariance;
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/** Internal structure for storing all user data.*/
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class OSG_EXPORT UserDataContainer : public osg::Referenced
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{
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public:
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UserDataContainer();
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UserDataContainer(const UserDataContainer& udc, const osg::CopyOp& copyop=CopyOp::SHALLOW_COPY);
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virtual void setThreadSafeRefUnref(bool threadSafe);
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typedef std::vector< osg::ref_ptr<osg::Object> > ObjectList;
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ref_ptr<Referenced> _userData;
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DescriptionList _descriptionList;
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ObjectList _objectList;
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protected:
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virtual ~UserDataContainer() {}
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};
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ref_ptr<UserDataContainer> _userDataContainer;
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/** Convinience method that returns the UserDataContainer, and if one doesn't already exist creates and assigns
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* one to the Object and then return this new UserDataContainer.*/
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UserDataContainer* getOrCreateUserDataContainer()
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{
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if (!_userDataContainer.valid()) _userDataContainer = new UserDataContainer;
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return _userDataContainer.get();
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}
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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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