if this is your code (with all the comments) then here is what you should do:
- forget about your osg::Camera* camera = new Camera; // there is already a Camera attached to the View - use view.getCamera()->setProjectionMatrixAsPerspective(45,1,1,1000); - no need to attach any CameraManipulator if you want to set the view matrix by your own (although that is the purpose of the CameraManipulator, to change the view matrix - probably you do it this way when you get more familiar with the code) - in your loop you do viewer.getView(0)->getCamera()->setViewMatrixAsLookAt(eye,center,up) -Nick On Wed, Dec 15, 2010 at 7:02 PM, Bart Jan Schuit <[email protected]> wrote: > Hi, > > I'm trying to setup some cameras without a manipulator. When I assign a > Trackballmanipulator on the vies, I get the cow projected on the screen. But > as soon as I manually setup the cameras, I get a completely black screen. > I extract eye, center and up from Tman (Trackballmanipulator) by > Tman->getMatrix().lookat(eye, center, up). > > This gives some nice coordinates, but when I put these in a camera without > a manipulator like Tman, I just get a black screen. What am I doing wrong > here? > > > Code: > > int main( int argc, char **argv ) > { > > // use an ArgumentParser object to manage the program arguments. > osg::ArgumentParser arguments(&argc,argv); > > > > osg::Group* scene = new osg::Group(); > osg::Node* groundNode = NULL; > groundNode = osgDB::readNodeFile("cow.osg"); > > scene->addChild(groundNode); > > osgViewer::CompositeViewer viewer(arguments); > > if (arguments.read("-2")) > { > > // view one > { > > osg::Vec3d eye = osg::Vec3d(0,0,250); > osg::Vec3d center = osg::Vec3d(0,0,250); > osg::Vec3d up = osg::Vec3d(0,0,-1); > osg::Quat rotation; > osg::Matrixd viewmat; > > osg::Camera* camera = new osg::Camera; > osgViewer::View* view = new osgViewer::View; > view->setName("View one"); > viewer.addView(view); > //camera->setProjectionMatrix( osg::Matrix::ortho2D(0,512,0,512) ); > //not doing anything > //camera->setReferenceFrame( osg::Transform::ABSOLUTE_RF ); > //camera->setViewMatrix( osg::Matrix::identity() ); > view->setCameraManipulator(Tman); > //Tman->setAutoComputeHomePosition(false); > view->setUpViewOnSingleScreen(0); > view->setSceneData(scene); > //view->setCamera(camera); > > } > > // view two > { > osg::Matrixd viewmat; > osg::Camera* camera = new osg::Camera; > osgViewer::View* view = new osgViewer::View; > view->setName("View two"); > viewer.addView(view); > view->setUpViewOnSingleScreen(1); > view->setSceneData(scene); > //view->setCamera(camera); > view->setCameraManipulator(Tman); > view->setName("right"); > osg::Vec3d eye = osg::Vec3d(0,0,25); > osg::Vec3d center = osg::Vec3d(0,0,25); > osg::Vec3d up = osg::Vec3d(0,0,-1); > } > } > viewer.realize(); > > > > while(!viewer.done()) > { > > osg::Vec3d eye = osg::Vec3d(0,0,50); > osg::Vec3d center = osg::Vec3d(0,0,50); > osg::Vec3d up = osg::Vec3d(0,0,-1); > Tman->setHomePosition(eye,center,up); //not working. Doesn't > matter how I set eye, center etc. > viewer.frame(); > } > } > > > > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=34890#34890 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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