Thank you Robert, I apologize for my ignorance. Actually I don't want to make any zoom in, I just want to clip objects behind the camera (is there any problem in clipping a sphere against a rectangular box?)
Thanks, Gianluca -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield Sent: venerdì 24 aprile 2009 11.02 To: OpenSceneGraph Users Subject: Re: [osg-users] update of zNear and zFar during drawing HI Gianluca, Arggghhg... You can't use orthographic projects in the same way that you use perspective projections, it simply doesn't work. Use orthographic projections for external views of the scene where clipping is not used. Do *not* use it for internal views where clipping is critical. Try to do this on and you'll just waste lots of your time and lots of the communities time trying to explain to you why it won't work. Robert. On Fri, Apr 24, 2009 at 9:44 AM, Gianluca Natale <gianluca.nat...@adstorino.it> wrote: > Hi all. > I have a strange behavior when I let OSG update the near and far clipping > planes during drawing. > When I use a perspective projection, and I move the camera inside the model > (I mean, inside the global > > bounding sphere of the model), the near clipping plane is placed very near > to the camera, so to clip > > as few objects as possible. I like this behavior, and I would like to use it > also for Orthogonal projections. > But in that case, when I move the camera into the model, the near clipping > plane becomes negative, > so the viewing volume includes always the whole model. And I dont like this > now. > > Is this the right behavior, or did I miss something/make some mistake? > If this is the way it works for orthogonal projections, is there a way to > make it work like perspective one? > > > > Thanks in advance. > > Gianluca Natale > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.12.4/2077 - Release Date: 04/23/09 19:21:00 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
