Thanks for your reply but my house names are not HUD texts. They are 3D objects too.
And for future purpose they have to be 3D objects. And I realize I posted to a wrong place in the forum, please move this post to the right place if you can ,thanks:) robertosfield wrote: > Hi Fan, > > > For HUD's like this have a look at the osghud example. The key bit you need > to add is to set the ClearMask to just clear the depth buffer of the overlaid > Camera, and set the RenderOrder of the Camera's to make sure the overlay > camera gets drawn second. > > Robert. > > > > On 24 April 2013 16:57, Fan ZHANG < ()> wrote: > > > Hi all, > > > > Sorry to disturb but I want to know how can I overlap two cameras with two > > different scenes? > > > > Here the picture is the result I tried with CompositeViewer, but this is > > not exactly what I want. As you can see, the names of houses are displayed > > in one view while buildings in another view. > > > > I have one scenegraph containing only buildings and another one containing > > only house names. Due to some specific needs, I can not put them under the > > same camera. > > > > So I have one camera adding houses as children and meanwhile one camera > > adding house names as children. So how can I overlap them in one view？ > > > > I tried like this but failed, I don't have a good master of OSG theory part > > :( > > > > > > Code: > > > > osgViewer::Viewer viewer; > > //is this a right way to add houses to one camera? > > viewer.getCamera()->addChild(houses); > > > > //here I want to construct a camera, with all the parameters the same as > > the viewer.getCamera(), so that they can be overlaped. Is this a right way? > > osg::Camera* myCam = new osg::Camera; > > myCam->setProjectionMatrix(viewer.getCamera()->getProjectionMatrix()); > > myCam->setViewMatrix(viewer.getCamera()->getViewMatrix()); > > myCam->setViewport(viewer.getCamera()->getViewport()); > > myCam->addChild(house names); > > myCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF); > > viewer.addSlave(myCam, false); > > > > > > > > And I don't know how to make them visualized. > > > > I searched for answer in older posts, and I found the "Producer" example, I > > don't have the Producer version. Then there was suggestion of looking at > > osgdistortion example where there are multiple cameras. However these > > multiple cameras share the same scene dataset, simple by > > viewer.assignSceneDataToCameras(). But I don't use the same dataset. > > > > I don't know if I make myself clear here. > > > > So huge thanks in advance for any reply:) > > > > Fan > > > > ------------------ > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=53788#53788 > > (http://forum.openscenegraph.org/viewtopic.php?p=53788#53788) > > > > > > > > > > Attachments: > > http://forum.openscenegraph.org//files/result_155.png > > (http://forum.openscenegraph.org//files/result_155.png) > > http://forum.openscenegraph.org//files/result_212.png > > (http://forum.openscenegraph.org//files/result_212.png) > > > > > > _______________________________________________ > > osg-users mailing list > > () > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > (http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org) > > > > > ------------------ > Post generated by Mail2Forum ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53790#53790 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
