159 lines
3.6 KiB
C++
159 lines
3.6 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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#include <osgViewer/Scene>
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#include <osgGA/EventVisitor>
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using namespace osgViewer;
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namespace osgViewer
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{
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struct SceneSingleton
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{
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SceneSingleton() {}
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inline void add(Scene* scene)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
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_cache.push_back(scene);
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}
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inline void remove(Scene* scene)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
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for(SceneCache::iterator itr = _cache.begin();
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itr != _cache.end();
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++itr)
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{
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if (scene==itr->get())
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{
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_cache.erase(itr);
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break;
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}
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}
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}
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inline Scene* getScene(osg::Node* node)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
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for(SceneCache::iterator itr = _cache.begin();
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itr != _cache.end();
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++itr)
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{
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Scene* scene = itr->get();
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if (scene && scene->getSceneData()==node) return scene;
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}
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return 0;
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}
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typedef std::vector< osg::observer_ptr<Scene> > SceneCache;
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SceneCache _cache;
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OpenThreads::Mutex _mutex;
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};
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static SceneSingleton& getSceneSingleton()
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{
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static SceneSingleton s_sceneSingleton;
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return s_sceneSingleton;
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}
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// Use a proxy to force the initialization of the the SceneSingleton during static initialization
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OSG_INIT_SINGLETON_PROXY(SceneSingletonProxy, getSceneSingleton())
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}
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Scene::Scene():
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osg::Referenced(true)
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{
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setDatabasePager(osgDB::DatabasePager::create());
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setImagePager(new osgDB::ImagePager);
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getSceneSingleton().add(this);
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}
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Scene::~Scene()
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{
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getSceneSingleton().remove(this);
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}
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void Scene::setSceneData(osg::Node* node)
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{
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_sceneData = node;
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}
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osg::Node* Scene::getSceneData()
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{
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return _sceneData.get();
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}
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const osg::Node* Scene::getSceneData() const
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{
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return _sceneData.get();
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}
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void Scene::setDatabasePager(osgDB::DatabasePager* dp)
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{
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_databasePager = dp;
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}
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void Scene::setImagePager(osgDB::ImagePager* ip)
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{
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_imagePager = ip;
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}
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void Scene::updateSceneGraph(osg::NodeVisitor& updateVisitor)
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{
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if (!_sceneData) return;
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if (getDatabasePager())
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{
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// synchronize changes required by the DatabasePager thread to the scene graph
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getDatabasePager()->updateSceneGraph((*updateVisitor.getFrameStamp()));
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}
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if (getImagePager())
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{
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// synchronize changes required by the DatabasePager thread to the scene graph
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getImagePager()->updateSceneGraph(*(updateVisitor.getFrameStamp()));
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}
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if (getSceneData())
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{
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updateVisitor.setImageRequestHandler(getImagePager());
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getSceneData()->accept(updateVisitor);
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}
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}
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Scene* Scene::getScene(osg::Node* node)
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{
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return getSceneSingleton().getScene(node);
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return 0;
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}
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Scene* Scene::getOrCreateScene(osg::Node* node)
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{
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if (!node) return 0;
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osgViewer::Scene* scene = getScene(node);
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if (!scene)
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{
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scene = new Scene;
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scene->setSceneData(node);
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}
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return scene;
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}
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