lpzviewer.h

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00001 /***************************************************************************
00002  *   Copyright (C) 2005 by Robot Group Leipzig                             *
00003  *    martius@informatik.uni-leipzig.de                                    *
00004  *    der@informatik.uni-leipzig.de                                        *
00005  *                                                                         *
00006  *   This program is free software; you can redistribute it and/or modify  *
00007  *   it under the terms of the GNU General Public License as published by  *
00008  *   the Free Software Foundation; either version 2 of the License, or     *
00009  *   (at your option) any later version.                                   *
00010  *                                                                         *
00011  *   This program is distributed in the hope that it will be useful,       *
00012  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00013  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00014  *   GNU General Public License for more details.                          *
00015  *                                                                         *
00016  *   You should have received a copy of the GNU General Public License     *
00017  *   along with this program; if not, write to the                         *
00018  *   Free Software Foundation, Inc.,                                       *
00019  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
00020  *                                                                         *
00021  *
00022  *******************************************`********************************/
00023 
00024 #include <osgViewer/Viewer>
00025 #include <osg/Group>
00026 
00027 namespace lpzrobots {
00028 
00029   /** Viewer holds a single view on to a single scene 
00030       that supports the rendering of offscreen RRT (render to texture) cameras
00031       at any time (without sync)
00032   */
00033   class LPZViewer : public osgViewer::Viewer {
00034   public:
00035     
00036     LPZViewer();
00037 
00038     LPZViewer(osg::ArgumentParser& arguments);
00039 
00040     LPZViewer(const osgViewer::Viewer& viewer, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
00041 
00042     virtual ~LPZViewer();
00043 
00044     /// is there a need to do an offscreen rendering?
00045     bool needForOffScreenRendering();
00046 
00047     /** call this function to render the off screen scene.
00048         If no off screen nodes are supplied than nothing is done      
00049     */
00050     virtual void renderOffScreen();
00051 
00052     /** set the group that contains the offscreen scene (usually RTT cameras)
00053         If no group is set or the group is empty than nothing
00054         is done in renderOffscreen();
00055      */
00056     virtual void setOffScreenData(osg::Group* offscreen);
00057     
00058   protected:
00059     virtual void offScreenRenderingTraversals();
00060     osg::Group* offScreenGroup;
00061 
00062     void lpzviewerConstructorInit();
00063 
00064   };
00065 
00066 }
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