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// Viewer.hxx -- alternative flightgear viewer application
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//
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// Copyright (C) 2009 - 2012 Mathias Froehlich
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#ifndef _FGVIEWER_VIEWER_HXX
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#define _FGVIEWER_VIEWER_HXX
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#include <osgViewer/Viewer>
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#include <simgear/math/SGMath.hxx>
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#include <simgear/scene/util/SGReaderWriterOptions.hxx>
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#include <simgear/timing/timestamp.hxx>
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#include <simgear/props/props.hxx>
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#include "Drawable.hxx"
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#include "Frustum.hxx"
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#include "Renderer.hxx"
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#include "SlaveCamera.hxx"
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#include "ArgumentParser.hxx"
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#if FG_HAVE_HLA
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#include "HLAViewerFederate.hxx"
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#endif
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namespace fgviewer {
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class Viewer : public osgViewer::Viewer {
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public:
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Viewer(ArgumentParser& arguments);
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virtual ~Viewer();
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bool readCameraConfig(const SGPropertyNode& viewerNode);
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void setupDefaultCameraConfigIfUnset();
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/// Short circuit osg config files.
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virtual bool readConfiguration(const std::string& filename);
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/// Callback class that cares for the camera and drawable setup
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void setRenderer(Renderer* renderer);
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Renderer* getRenderer();
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/// Access and create drawables
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Drawable* getOrCreateDrawable(const std::string& name);
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Drawable* getDrawable(const std::string& name);
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unsigned getDrawableIndex(const std::string& name);
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Drawable* getDrawable(unsigned index);
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unsigned getNumDrawables() const;
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/// Access and create slave cameras
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SlaveCamera* getOrCreateSlaveCamera(const std::string& name);
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SlaveCamera* getSlaveCamera(const std::string& name);
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unsigned getSlaveCameraIndex(const std::string& name);
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SlaveCamera* getSlaveCamera(unsigned index);
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unsigned getNumSlaveCameras() const;
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/// Realize the contexts and attach the cameras there
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virtual void realize();
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bool realizeDrawables();
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bool realizeSlaveCameras();
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/// exec methods
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virtual void advance(double simTime);
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virtual void updateTraversal();
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bool updateSlaveCameras();
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/// Store this per viewer instead of global.
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void setReaderWriterOptions(simgear::SGReaderWriterOptions* readerWriterOptions);
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simgear::SGReaderWriterOptions* getReaderWriterOptions();
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/// Puts the scene data under the renderer.
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/// Replaces the whole renderer independent scene.
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virtual void setSceneData(osg::Node* node);
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/// Adds the scene node to the global scene
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/// Use this to add something to the displayed scene.
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void insertSceneData(osg::Node* node);
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bool insertSceneData(const std::string& fileName, const osgDB::Options* options = 0);
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/// Return the scene data group.
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osg::Group* getSceneDataGroup();
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/// Traverse the scenegraph and throw out all child nodes that can be loaded again.
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void purgeLevelOfDetailNodes();
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/// Return a default screen identifier. Under UNIX the default DISPLAY environment variable.
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static osg::GraphicsContext::ScreenIdentifier getDefaultScreenIdentifier();
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/// Interpret the given display. Is mergend with the default screen identifier.
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static osg::GraphicsContext::ScreenIdentifier getScreenIdentifier(const std::string& display);
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/// Return screen settings, mostly the resolution of the given screen.
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osg::GraphicsContext::ScreenSettings getScreenSettings(const osg::GraphicsContext::ScreenIdentifier& screenIdentifier);
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/// Return traits struct for the given screen identifier. The size and position is already set up for a fullscreen window.
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osg::GraphicsContext::Traits* getTraits(const osg::GraphicsContext::ScreenIdentifier& screenIdentifier);
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/// Helper to create an new graphics context from traits.
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osg::GraphicsContext* createGraphicsContext(osg::GraphicsContext::Traits* traits);
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#if FG_HAVE_HLA
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/// The federate if configured, can only be set once
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const HLAViewerFederate* getViewerFederate() const;
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HLAViewerFederate* getViewerFederate();
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void setViewerFederate(HLAViewerFederate* viewerFederate);
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#endif
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private:
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Viewer(const Viewer&);
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Viewer& operator=(const Viewer&);
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/// Unload all lod's
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class _PurgeLevelOfDetailNodesVisitor;
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#ifdef __linux__
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/// Under linux make sure that the screen saver does not jump in
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class _ResetScreenSaverSwapCallback;
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#endif
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/// The renderer used to setup the higher level camera/scenegraph structure
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SGSharedPtr<Renderer> _renderer;
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/// The drawables managed by this viewer.
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typedef std::vector<SGSharedPtr<Drawable> > DrawableVector;
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DrawableVector _drawableVector;
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/// The slave cameras for this viewer.
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/// Since we support more complex renderers, we can not only use osg::View::Slave.
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typedef std::vector<SGSharedPtr<SlaveCamera> > SlaveCameraVector;
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SlaveCameraVector _slaveCameraVector;
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/// The top level options struct
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osg::ref_ptr<simgear::SGReaderWriterOptions> _readerWriterOptions;
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/// The top level scenegraph structure that is used for drawing
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osg::ref_ptr<osg::Group> _sceneDataGroup;
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/// Stores the time increment for each frame.
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/// If zero, the time advance is done to the current real time.
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SGTimeStamp _timeIncrement;
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/// The current simulation time of the viewer
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SGTimeStamp _simTime;
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#if FG_HAVE_HLA
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/// The federate if configured
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SGSharedPtr<HLAViewerFederate> _viewerFederate;
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#endif
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};
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} // namespace fgviewer
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#endif
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