FGFS-4.1/OpenSceneGraph
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Moved rendering support into GraphisContext, osgViewer::Viewer/View, and

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added frame stamp updating and update traversal to osgViewer::Scene/Viewer.

Updated osgcamera example to use new Viewer API calls instead of using local
rendering calls.
This commit is contained in:
Robert Osfield
2006-12-21 16:56:20 +00:00
parent 8f9d2eeb46
commit 4fc9af7ea0
10 changed files with 311 additions and 96 deletions
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63
examples/osgcamera/osgcamera.cpp
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@@ -71,67 +71,22 @@ int main( int argc, char **argv )
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->setSceneData(loadedModel.get());
viewer->setCameraManipulator(new osgGA::TrackballManipulator());
viewer->setUpViewAcrossAllScreens();
viewer->realize();
osgViewer::Viewer viewer;
viewer->getCamera()->setClearColor(osg::Vec4f(0.6f,0.6f,0.8f,1.0f));
osg::ref_ptr<osg::FrameStamp> frameStamp = new osg::FrameStamp;
viewer.setSceneData(loadedModel.get());
unsigned int frameNum = 0;
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.getCamera()->setClearColor(osg::Vec4f(0.6f,0.6f,0.8f,1.0f));
osgUtil::UpdateVisitor updateVisitor;
updateVisitor.setFrameStamp(frameStamp.get());
setUpFrameStamp(viewer->getCamera(), frameStamp.get(), loadedModel.get());
for(unsigned i=0; i<viewer->getNumSlaves(); ++i)
viewer.setUpViewAcrossAllScreens();
viewer.realize();
while(!viewer.done())
{
osg::View::Slave& slave = viewer->getSlave(i);
setUpFrameStamp(slave._camera.get(), frameStamp.get(), loadedModel.get());
viewer.frame();
}
// 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->frameAdvance();
viewer->frameEventTraversal();
viewer->frameUpdateTraversal();
// viewer->getCamera()->setViewMatrix(viewMatrix);
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());
}
}
}