Thank you very much to everyone for the replies, now the situation is much clearer and I think I can solve my problem which by the way is (should be) very easy, that is I need the context id simply to pass it to some function that check the support for extensions like "point sprite". I am going to have multiple opengl windows but on simple systems, with one card, one monitor, so checking for the supported extensions in one context should be valid for all the others.
Thank you again, Michele On Dec 14, 2007 11:14 AM, Robert Osfield <[EMAIL PROTECTED]> wrote: > HI Michale, > > The ContextID is associated with GraphicsContext's, and its the > Viewer's Camera's that hold the GraphicsContext (normally a > GraphicsWindowsX11/Win32/Carbon subclass), and each GraphicsContext > has the State object, each of which has the ContextID so on can do: > > viewer.getCamera()->getGraphicsContext()->getState()->getContextID(); > > Or if the viewer's master Camera doesn't have a GraphicsContext, > instead it delegates the rendering to its slaves then you'll need to > iterator through the slave Camera's to get the ContextID. There is a > viewer.getContexts(osgViewer::ViewerBase::Contexts&) convinience > method to help you get the lists of all the active graphics contexts, > so you could easily use this instead of iterating through. > > And... not once did you need to grapple with the internal > implementation of SceneView that is used the hood. But if you really > really must grapple then the Camera::getRenderer() will give you the > Renderer that is used to do the rendering - and its this > osgViewer::Renderer that has the SceneView that does all the internal > work. > > Robert. > > > On Dec 13, 2007 9:52 PM, Michele Bosi <[EMAIL PROTECTED]> wrote: > > Hello, > > I need to retrieve the current contextID or the contextID that a > > Viewer is working on, how do I do it? > > I saw in the documentation that one should retrieve the SceneView but > > it doesn't say how / from where, and I couldn't > > figure it out, as far a I could see osg::View and its subclasses > > doesn't have such a getSceneView() method > > or similar. I saw that there were some posts about how to retrieve the > > context from a camera but that seemed > > to be more of an hack than the actual "standard" way so if possible I > > would like to avoid that solution. > > So, what is the clean and mean way of retrieving the SceneView given > > an osgViewer::Viewer? > > > > Regards, > > Michele > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
