Thanks Robert and Christophe, I guess my question is once I have a trackball manipulator on my main camera and read the camera's eye and center in the post draw callback, what is the transformation needed to convert those eye and center vectors to the vectors I would get if there was no trackball manipulator on the main camera ? Hope this is a bit clearer on what I want to do...
Bill -----Original Message----- From: [EMAIL PROTECTED] on behalf of Robert Osfield Sent: Tue 9/18/2007 11:28 AM To: OpenSceneGraph Users Subject: Re: [osg-users] Trackball and view question Hi Bill, The camera manipulators role is to modifying the view matrix so I'm a bit perplexed that you are suprised by this. Also please considering move from SimpleViewer up to osgViewer::Viewer working as an embedded viewer in 2.x rather than using SimpleViewer as it only existed for a short while and has been totally superseded. Robert. On 9/18/07, Poirier, Guillaume <[EMAIL PROTECTED]> wrote: > > > > > Hello everyone, > > I am using a SimpleViewer. I set up a post draw callback on its main > camera. In it > I read the camera eye, center, and up vectors. Initially, this give me (0, > 0, 0), > (0, 0, -1), and (0, 1, 0) respectively. This is what I expect and it gives > me a > particular view of my scene. > > Now I add a trackball manipulator to the main camera and set up the view > similar > to what I had previously. When I read back the data it is quite different. > I would have > expected the same camera position / orientation than before since what I > see is > similar. Unless the trackball affects the model position / orientation and > not just > the view ? How can I use a trackball and read back in the post draw > callback the > values I want ? > > > sincerely, > > > Bill > _______________________________________________ > 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
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