Hi Stephan, I finally find the time to try your solution, and that works perfectly fine! The background video is displayed at 30fps independently of the 3D scene, so the user experience is much better now :D
Thanks a lot and merry Christmas ! Jeremy sth wrote: > Hi, > > instead of making the opengl-view transparent you can render the > live-video as a texture inside osg, you'll have to feed the video-image > into an osg-texture, but it's relatively simple to do. > > If you insist in a transparent opengl view you'll have to hack > GraphicsWindowIOS.mm, as there's no support for transparent views yet. > > Change eaglLayer.opaque = YES; to eaglLayer.opaque = NO; around line > 200, and be sure, that your osg-displaysettings / > GraphicsWindows::Traits require an alpha-channel. (I have not tested > this approach, ymmv) > > For some background: > http://stackoverflow.com/questions/1394934/iphone-layering-a-transparent-opengl-view-on-top-of-a-uiview > > HTH, > Stephan > > Am 26.11.11 21:36, schrieb Jeremy Blatter: > > > I'm developing an augmented reality application for iPad. I'm using > > OpenSceneGraph to render the 3D objects over the camera view. > > My code is based on the view_test iPhone example given with the sources on > > Github, so we can discuss my problem from this exemple. > > > > I wish to set the background of the OSG Viewer transparent, so we can see > > the UIView behind (which contains the iPad camera preview layer in my > > application, that works well). > > To be clear, say that in the view_test exemple, I change the background > > color of the view in FlipsideViewController.mm > > > > > > Code: > > - (void)viewDidLoad { > > ... > > self.view.backgroundColor = [UIColor redColor]; > > ... > > } > > > > > > > > Then, I wish to see this red color as background for my 3D scene (the box) > > instead of the default blue background. > > My intuition was to change the clearColor to black with the alpha channel > > set to 0 : > > > > > > Code: > > _viewer->getCamera()->setClearColor(osg::vec4(0.0f, 0.0f, 0.0f, 0.0f)); > > > > > > > > The background is black as expected, but the alpha value is not considered > > (as if it was always 1.0f). > > Any ideas? > > > > _______________________________________________ > osg-users mailing list > > 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=44451#44451 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
