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76 lines
2.4 KiB
76 lines
2.4 KiB
/* -*-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_OBSERVERNODEPATH |
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#define OSG_OBSERVERNODEPATH 1 |
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#include <osg/Node> |
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#include <osg/observer_ptr> |
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#include <vector> |
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namespace osg { |
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typedef std::vector< osg::ref_ptr<osg::Node> > RefNodePath; |
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/** ObserverNodePath is an observer class for tracking changes to a NodePath, |
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* that automatically invalidates it when nodes are deleted.*/ |
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class OSG_EXPORT ObserverNodePath |
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{ |
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public: |
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ObserverNodePath(); |
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ObserverNodePath(const ObserverNodePath& rhs); |
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ObserverNodePath(const osg::NodePath& nodePath); |
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~ObserverNodePath(); |
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ObserverNodePath& operator = (const ObserverNodePath& rhs); |
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/** get the NodePath from the first parental chain back to root, plus the specified node.*/ |
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void setNodePathTo(osg::Node* node); |
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void setNodePath(const osg::RefNodePath& nodePath); |
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void setNodePath(const osg::NodePath& nodePath); |
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void clearNodePath(); |
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/** Get a thread safe RefNodePath, return true if NodePath is valid.*/ |
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bool getRefNodePath(RefNodePath& refNodePath) const; |
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/** Get a lightweight NodePath that isn't thread safe but |
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* may be safely used in single threaded applications, or when |
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* its known that the NodePath won't be invalidated during usage |
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* of the NodePath. return true if NodePath is valid.*/ |
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bool getNodePath(NodePath& nodePath) const; |
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bool empty() const |
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{ |
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex); |
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return _nodePath.empty(); |
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} |
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protected: |
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void _setNodePath(const osg::NodePath& nodePath); |
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void _clearNodePath(); |
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typedef std::vector< osg::observer_ptr<osg::Node> > ObsNodePath; |
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mutable OpenThreads::Mutex _mutex; |
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ObsNodePath _nodePath; |
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}; |
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} |
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#endif
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