123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
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/* -*-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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using namespace osgViewer;
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Scene::Scene():
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_firstFrame(true)
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{
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_startTick = osg::Timer::instance()->tick();
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_frameStamp = new osg::FrameStamp;
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_frameStamp->setFrameNumber(0);
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_frameStamp->setReferenceTime(0);
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_updateVisitor = new osgUtil::UpdateVisitor;
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_eventQueue->setStartTick(_startTick);
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_eventVisitor = new osgGA::EventVisitor;
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setDatabasePager(new osgDB::DatabasePager);
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}
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Scene::~Scene()
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{
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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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if (_databasePager.valid())
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{
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// register any PagedLOD that need to be tracked in the scene graph
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_databasePager->registerPagedLODs(node);
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}
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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::frameAdvance()
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{
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osg::Timer_t currentTick = osg::Timer::instance()->tick();
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_frameStamp->setReferenceTime(osg::Timer::instance()->delta_s(_startTick,currentTick));
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_frameStamp->setFrameNumber(_frameStamp->getFrameNumber()+1);
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}
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void Scene::frameEventTraversal()
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{
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_eventQueue->frame( _frameStamp->getReferenceTime() );
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osgGA::EventQueue::Events events;
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_eventQueue->takeEvents(events);
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if (_eventVisitor.valid())
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{
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_eventVisitor->setTraversalNumber(_frameStamp->getFrameNumber());
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}
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for(osgGA::EventQueue::Events::iterator itr = events.begin();
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itr != events.end();
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++itr)
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{
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osgGA::GUIEventAdapter* event = itr->get();
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bool handled = false;
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if (_eventVisitor.valid() && getSceneData())
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{
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_eventVisitor->reset();
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_eventVisitor->addEvent( event );
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getSceneData()->accept(*_eventVisitor);
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if (_eventVisitor->getEventHandled()) handled = true;
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}
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for(EventHandlers::iterator hitr = _eventHandlers.begin();
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hitr != _eventHandlers.end() && !handled;
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++hitr)
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{
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// handled = (*hitr)->handle( *event, *this, 0, 0);
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}
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}
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}
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void Scene::frameUpdateTraversal()
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{
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if (_databasePager.valid())
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{
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// tell the DatabasePager the frame number of that the scene graph is being actively used to render a frame
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_databasePager->signalBeginFrame(_frameStamp.get());
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// syncronize changes required by the DatabasePager thread to the scene graph
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_databasePager->updateSceneGraph(_frameStamp->getReferenceTime());
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}
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}
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