Changeset 5824 for OpenSceneGraph/trunk/examples/osgcamera/osgcamera.cpp

Timestamp:

12/19/06 17:12:29 (6 years ago)

Author:

robert

Message:

Added osgViewer::Viewer / osgViewer::GraphicsWindowsX11 usage.

Files:

• OpenSceneGraph/trunk/examples/osgcamera/osgcamera.cpp (modified) (4 diffs)

OpenSceneGraph/trunk/examples/osgcamera/osgcamera.cpp

@@ -17 +17 @@
 #include <osgDB/Registry>
 
+#include <osgViewer/View>
+
 #include <map>
 #include <list>
@@ -22 +24 @@
 
 
+#if !defined(_WIN32)
+
+#include <osgViewer/GraphicsWindowX11>
+#include <osgViewer/Viewer>
+
+void renderCamera(osg::Camera* camera)
+{
+    osg::GraphicsContext* gc = camera->getGraphicsContext();
+    if (!gc) return;
+    
+    osgUtil::SceneView* sceneView = dynamic_cast<osgUtil::SceneView*>(camera->getRenderingCache(0));
+    if (!sceneView) return;
+
+    gc->makeCurrent();
+    
+    sceneView->cull();
+    sceneView->draw();
+    
+    gc->swapBuffers();
+}
+
+void setUpFrameStamp(osg::Camera* camera, osg::FrameStamp* frameStamp, osg::Node* loadedModel)
+{
+    osgUtil::SceneView* sceneView = dynamic_cast<osgUtil::SceneView*>(camera->getRenderingCache(0));
+    if (!sceneView) return;
+    
+    sceneView->setFrameStamp(frameStamp);
+    
+    sceneView->setSceneData(loadedModel);
+    
+}
+
+int main( int argc, char **argv )
+{
+    if (argc<2) 
+    {
+        std::cout << argv[0] <<": requires filename argument." << std::endl;
+        return 1;
+    }
+
+    // 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;
+    }
+    
+    // initialize the view to look at the center of the scene graph
+    const osg::BoundingSphere& bs = loadedModel->getBound();
+    osg::Matrix viewMatrix;
+    viewMatrix.makeLookAt(bs.center()-osg::Vec3(0.0,2.0f*bs.radius(),0.0),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
+
+    osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;
+    viewer->setUpViewAcrossAllScreens();
+    viewer->realize();
+    
+    viewer->getCamera()->setClearColor(osg::Vec4f(0.6f,0.6f,0.8f,1.0f));
+    
+    osg::ref_ptr<osg::FrameStamp> frameStamp = new osg::FrameStamp;
+
+    unsigned int frameNum = 0;
+
+    osgUtil::UpdateVisitor updateVisitor;
+    updateVisitor.setFrameStamp(frameStamp.get());
+    
+    setUpFrameStamp(viewer->getCamera(), frameStamp.get(), loadedModel.get());
+    for(unsigned i=0; i<viewer->getNumSlaves(); ++i)
+    {
+        osg::View::Slave& slave = viewer->getSlave(i);
+        setUpFrameStamp(slave._camera.get(), frameStamp.get(), loadedModel.get());
+    }
+
+    // record the timer tick at the start of rendering.    
+    osg::Timer_t start_tick = osg::Timer::instance()->tick();
+    osg::Timer_t previous_tick = start_tick;
+
+    while(true)
+    {
+        osg::Timer_t current_tick = osg::Timer::instance()->tick();
+
+        frameStamp->setReferenceTime(osg::Timer::instance()->delta_s(start_tick,current_tick));
+        frameStamp->setFrameNumber(frameNum++);
+        
+        //std::cout<<"Frame rate "<<1.0/osg::Timer::instance()->delta_s(previous_tick,current_tick)<<std::endl;
+        previous_tick = current_tick;
+
+        // do the update traversal.
+        loadedModel->accept(updateVisitor);
+
+
+        viewer->getCamera()->setViewMatrix(viewMatrix);
+
+        viewer->updateSlaves();
+
+        if (viewer->getCamera() && viewer->getCamera()->getGraphicsContext()) renderCamera(viewer->getCamera());
+        
+        for(unsigned i=0; i<viewer->getNumSlaves(); ++i)
+        {
+            osg::View::Slave& slave = viewer->getSlave(i);
+            if (slave._camera.valid() && slave._camera->getGraphicsContext()) renderCamera(slave._camera.get());
+        }
+        
+    }
+}
+
+
+#else
+
+
+//////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//  
+//  ORIGINAL osgcamera example code.
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -156 +271 @@
     }
 
+
+    osg::ref_ptr<osgViewer::View> view = new osgViewer::View;
+    view->setUpViewAcrossAllScreens();
+
+
+
+
     unsigned int numScreens = wsi->getNumScreens();
-    for(unsigned int i=0; i<numScreens; ++i)
-    {
-        osg::GraphicsContext::ScreenIdentifier si;
-        si._screenNum = 0;
-        
-        unsigned int width, height;
-        wsi->getScreenResolution(si, width, height);
-        
-        std::cout<<"screen= "<<i<<" width="<<width<<" height="<<height<<std::endl;
-    }
-        
 
     unsigned int numberCameras = numScreens;
@@ -410 +521 @@
     return 0;
 }
+
+#endif