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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
