Renamed osg::CameraNode to osg::Camera, cleaned up osg::View.

Added beginnings of new osgViewer::Scene,View,Viewer,CompositeViewer and GraphicsWindowProxy files.

src/osgViewer/Scene.cpp

@@ -0,0 +1,122 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgViewer/Scene>
+
+using namespace osgViewer;
+
+Scene::Scene():
+    _firstFrame(true)
+{
+    _startTick = osg::Timer::instance()->tick();
+    _frameStamp = new osg::FrameStamp;
+    _frameStamp->setFrameNumber(0);
+    _frameStamp->setReferenceTime(0);
+
+    _updateVisitor = new osgUtil::UpdateVisitor;
+
+    _eventQueue->setStartTick(_startTick);
+
+    _eventVisitor = new osgGA::EventVisitor;
+    
+    setDatabasePager(new osgDB::DatabasePager);
+}
+
+Scene::~Scene()
+{
+}
+
+void Scene::setSceneData(osg::Node* node)
+{
+    _sceneData = node;
+    
+    if (_databasePager.valid())
+    {    
+        // register any PagedLOD that need to be tracked in the scene graph
+        _databasePager->registerPagedLODs(node);
+    }
+}
+
+osg::Node* Scene::getSceneData()
+{
+    return _sceneData.get();
+}
+
+const osg::Node* Scene::getSceneData() const
+{
+    return _sceneData.get();
+}
+
+void Scene::setDatabasePager(osgDB::DatabasePager* dp)
+{
+    _databasePager = dp;
+}
+
+void Scene::frameAdvance()
+{
+    osg::Timer_t currentTick  = osg::Timer::instance()->tick();
+    _frameStamp->setReferenceTime(osg::Timer::instance()->delta_s(_startTick,currentTick));
+    _frameStamp->setFrameNumber(_frameStamp->getFrameNumber()+1);
+}
+
+void Scene::frameEventTraversal()
+{
+    _eventQueue->frame( _frameStamp->getReferenceTime() );
+
+    osgGA::EventQueue::Events events;
+    _eventQueue->takeEvents(events);
+    
+    if (_eventVisitor.valid())
+    {
+        _eventVisitor->setTraversalNumber(_frameStamp->getFrameNumber());
+    }
+    
+    for(osgGA::EventQueue::Events::iterator itr = events.begin();
+        itr != events.end();
+        ++itr)
+    {
+        osgGA::GUIEventAdapter* event = itr->get();
+    
+        bool handled = false;
+        
+        if (_eventVisitor.valid() && getSceneData())
+        {
+            _eventVisitor->reset();
+            _eventVisitor->addEvent( event );
+            
+            getSceneData()->accept(*_eventVisitor);
+            
+            if (_eventVisitor->getEventHandled())  handled = true;
+        }
+        
+        for(EventHandlers::iterator hitr = _eventHandlers.begin();
+            hitr != _eventHandlers.end() && !handled;
+            ++hitr)
+        {
+//            handled = (*hitr)->handle( *event, *this, 0, 0);
+        }
+    }
+}
+
+void Scene::frameUpdateTraversal()
+{
+    if (_databasePager.valid())
+    {    
+        // tell the DatabasePager the frame number of that the scene graph is being actively used to render a frame
+        _databasePager->signalBeginFrame(_frameStamp.get());
+
+        // syncronize changes required by the DatabasePager thread to the scene graph
+        _databasePager->updateSceneGraph(_frameStamp->getReferenceTime());
+    }
+}
+