> Hi Paul, > > The field of view is governed by the cameras projection > matrix. The default projection matrix used is controlled via > the OSG_SCREEN_DISTANCE, OSG_SCREEN_HEIGHT and > OSG_SCREEEN_WIDTH if they are set, otherwise its defaults for > these are chosen, or the application itself sets the > projection matrix and hence the fov-x/fov-y.
Okay, I understand that "if you are setting fovx and fovy explicityly" refers to anything you might do in your app to set a non-default FOV. However, isn't it possible a user might still want their aspect ratio automatically adjusted for split screen stereo, even if they set a non-default FOV? The help text message implies the user should always disable aspect ratio auto adjustment in such a case. I'm not sure why. Maybe for the case where the user has set the FOV explicitly and _also_ has already compensated for the split screen stereo aspect ratio...? Thanks, -Paul > It might be appropriate to tweak the language of this comment > to better reflect the above. > > Robert. > > On Dec 10, 2007 9:40 PM, Paul Martz <[EMAIL PROTECTED]> wrote: > > > > > > Hi Robert -- If I do "osgviewer --help-env", one of the displayed > > environment variables is OSG_SPLIT_STEREO_AUTO_ADJUST_ASPECT_RATIO, > > with the following description: > > > > Default to ON to compenstate for the compression of the > aspect ratio > > when viewing in split screen stereo. Note, if you are setting fovx > > and fovy explicityly OFF should be used. > > However, no where in the --help-env output is any mention > of either "fovx" > > or "fovy", or how you would set them. Can you please elaborate on > > these values refer to? > > > > This is for my environment variable reference. In my > description for > > OSG_SPLIT_STEREO_AUTO_ADJUST_ASPECT_RATIO, I'd like to include text > > telling users that this should be set to OFF if they are setting > > "fovx" or "fovy", but I need to know what "fovx" and "fovy" are > > referring to and how a user would set them. Thanks. > > > > I see this is used in SceneView to compute the left and right eye > > projection scale factors, but I don't see any other way to > set these scale factors. > > Perhaps the message is simply out of date. > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > 303 859 9466 > > > > _______________________________________________ > > 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-opensce negraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
