Made the custom window set up a runtime option

examples/osghangglide/osghangglide.cpp

@@ -114,8 +114,6 @@ int main( int argc, char **argv )
     // construct the viewer.
     osgViewer::Viewer viewer;
 
-    viewer.setCameraManipulator(new GliderManipulator());
-
     // if user request help write it out to cout.
     if (arguments.read("-h") || arguments.read("--help"))
     {
@@ -123,24 +121,12 @@ int main( int argc, char **argv )
         return 1;
     }
     
-    // any option left unread are converted into errors to write out later.
-    arguments.reportRemainingOptionsAsUnrecognized();
+    bool customWindows = false;
+    while(arguments.read("-1")) customWindows = true;
+    while(arguments.read("-2")) customWindows = false;
 
-    // report any errors if they have occured when parsing the program aguments.
-    if (arguments.errors())
+    if (customWindows)
     {
-        arguments.writeErrorMessages(std::cout);
-        return 1;
-    }
-    
-    // load the nodes from the commandline arguments.
-    osg::Node* rootnode = osgDB::readNodeFiles(arguments);
-    if (!rootnode) rootnode = createModel();
-
-    viewer.setSceneData( rootnode );
-
-#if 0
-
         osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
         if (!wsi) 
         {
@@ -194,25 +180,19 @@ int main( int argc, char **argv )
 
             viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::scale(aspectRatioScale,1.0,1.0));
         }
-
-    viewer.setUpRenderingSupport();
-    viewer.assignSceneDataToCameras();
-    
-#else
-
+    }    
+    else
+    {
         viewer.setUpViewAcrossAllScreens();
     
-#endif    
-
-    viewer.realize();
-
-    while( !viewer.done() )
-    {
-        // fire off the cull and draw traversals of the scene.
-        viewer.frame();
-        
     }
 
-    return 0;
+    // set up the camera manipulation with out custom manipultor
+    viewer.setCameraManipulator(new GliderManipulator());
+
+    // pass the scene graph to the viewer    
+    viewer.setSceneData( createModel() );
+
+    return viewer.run();
 }