Changeset 5872 for OpenSceneGraph/trunk/examples/osgcamera/osgcamera.cpp

Timestamp:

01/02/07 18:39:31 (6 years ago)

Author:

robert

Message:

Added support for different threading models in osgViewer::Viewer

Files:

• OpenSceneGraph/trunk/examples/osgcamera/osgcamera.cpp (modified) (2 diffs)

OpenSceneGraph/trunk/examples/osgcamera/osgcamera.cpp

@@ -8 +8 @@
 #include <osgViewer/Viewer>
 #include <osgGA/TrackballManipulator>
+#include <osgGA/AnimationPathManipulator>
 #include <iostream>
 
-int main( int argc, char **argv )
+void singleWindowMultipleCameras(osgViewer::Viewer& viewer)
 {
-    if (argc<2) 
-    {
-        std::cout << argv[0] <<": requires filename argument." << std::endl;
-        return 1;
-    }
-
-
-    osg::DisplaySettings::instance()->setMaxNumberOfGraphicsContexts(2);
-    osg::Referenced::setThreadSafeReferenceCounting(true);
-
-    // load the scene.
-    osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile(argv[1]);
-    if (!loadedModel) 
-    {
-        std::cout << argv[0] <<": No data loaded." << std::endl;
-        return 1;
-    }
-
-    osgViewer::Viewer viewer;
-    
-    viewer.setSceneData(loadedModel.get());
-
-    viewer.setCameraManipulator(new osgGA::TrackballManipulator());
-    viewer.getCamera()->setClearColor(osg::Vec4f(0.6f,0.6f,0.8f,1.0f));
-
-#if 0
-
     osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
     if (!wsi) 
     {
         osg::notify(osg::NOTICE)<<"View::setUpViewAcrossAllScreens() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
-        return 0;
+        return;
     }
     
@@ -92 +66 @@
     viewer.setUpRenderingSupport();
     viewer.assignSceneDataToCameras();
+}
+
+void multipleWindowMultipleCameras(osgViewer::Viewer& viewer)
+{
+    osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
+    if (!wsi) 
+    {
+        osg::notify(osg::NOTICE)<<"View::setUpViewAcrossAllScreens() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
+        return;
+    }
+    
+    unsigned int width, height;
+    wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
+
+
+    unsigned int numCameras = 2;
+    double aspectRatioScale = (double)numCameras;
+    double translate_x = double(numCameras)-1;
+    for(unsigned int i=0; i<numCameras;++i, translate_x -= 2.0)
+    {
+        osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
+        traits->x = (i*width)/numCameras;
+        traits->y = 0;
+        traits->width = width/numCameras-1;
+        traits->height = height;
+    #if 1
+        traits->windowDecoration = false;
+    #else
+        traits->windowDecoration = true;
+    #endif            
+        traits->doubleBuffer = true;
+        traits->sharedContext = 0;
+
+        osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
+
+        osgViewer::GraphicsWindow* gw = dynamic_cast<osgViewer::GraphicsWindow*>(gc.get());
+        if (gw)
+        {
+            osg::notify(osg::NOTICE)<<"  GraphicsWindow has been created successfully."<<gw<<std::endl;
+
+            gw->getEventQueue()->getCurrentEventState()->setWindowRectangle(0, 0, traits->width, traits->height );
+        }
+        else
+        {
+            osg::notify(osg::NOTICE)<<"  GraphicsWindow has not been created successfully."<<std::endl;
+        }
+
+        osg::ref_ptr<osg::Camera> camera = new osg::Camera;
+        camera->setGraphicsContext(gc.get());
+        camera->setViewport(new osg::Viewport(0,0, width/numCameras, height));
+        GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
+        camera->setDrawBuffer(buffer);
+        camera->setReadBuffer(buffer);
+
+        viewer.addSlave(camera.get(), osg::Matrix::scale(aspectRatioScale, 1.0, 1.0)*osg::Matrix::translate(translate_x, 0.0, 0.0), osg::Matrix() );
+    }
+
+    viewer.setUpRenderingSupport();
+    viewer.assignSceneDataToCameras();
+}
+
+int main( int argc, char **argv )
+{
+    // use an ArgumentParser object to manage the program arguments.
+    osg::ArgumentParser arguments(&argc,argv);
+
+    if (argc<2) 
+    {
+        std::cout << argv[0] <<": requires filename argument." << std::endl;
+        return 1;
+    }
+
+
+    std::string pathfile;
+    osg::ref_ptr<osgGA::AnimationPathManipulator> apm = 0;
+    while (arguments.read("-p",pathfile))
+    {
+        apm = new osgGA::AnimationPathManipulator(pathfile);
+        if(!apm.valid() || !(apm->valid()) ) 
+        {
+            apm = 0;
+        }
+    }
+
+    osg::DisplaySettings::instance()->setMaxNumberOfGraphicsContexts(2);
+    osg::Referenced::setThreadSafeReferenceCounting(true);
+
+    // load the scene.
+    osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
+    if (!loadedModel) 
+    {
+        std::cout << argv[0] <<": No data loaded." << std::endl;
+        return 1;
+    }
+
+    osgViewer::Viewer viewer;
+    
+    while (arguments.read("-s")) { viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded); }
+    while (arguments.read("-g")) { viewer.setThreadingModel(osgViewer::Viewer::ThreadPerContext); }
+    while (arguments.read("-c")) { viewer.setThreadingModel(osgViewer::Viewer::ThreadPerCamera); }
+
+    viewer.setSceneData(loadedModel.get());
+
+    if (apm.valid()) viewer.setCameraManipulator(apm.get());
+    else viewer.setCameraManipulator( new osgGA::TrackballManipulator() );
+    viewer.getCamera()->setClearColor(osg::Vec4f(0.6f,0.6f,0.8f,1.0f));
+
+#if 1
+
+    // singleWindowMultipleCameras(viewer);
+    
+    multipleWindowMultipleCameras(viewer);
+    
     
 #else