you want to avoid creating a window then and just render the scene given a view to a off screen buffer (backbuffer, fbo, pbuffer) and read pixels from it without switching to the front buffer. but im new to osg so thats about the explanation i could give you :/
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tessier, Philip Sent: 24. april 2008 23:13 To: OpenSceneGraph Users Subject: Re: [osg-users] Off-screen rendering Thank you, Phil -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeremy Moles Sent: Thursday, April 24, 2008 4:08 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Off-screen rendering On Thu, 2008-04-24 at 15:48 -0500, Tessier, Philip wrote: > All, > > I was able to use the osgprerender example to obtain most of what I > need - the rendering of a scene into an osg::Image. As that's ALL I > want, I need help with a tweak to it. It uses a viewer.run() to do > the work. I've replaced this with a viewer.frame(). This produces a > flicker on the screen as the viewer realizes the frame. As I'm > interested in an off-screen grab, this is annoying. > > I'm reasonably sure that I don't want a viewer at all, but I don't > know what to simplify it to. This is a copy/paste of a response Robert gave to a question like this a few months ago... ------------------------------------------------------------------ Where supported one can use a pbuffer on Win32, X11 and Carbon implementations in osgViewer. Just create the Traits with the pbuffer option set to true, then create your GraphicsContext as per the osgcamera or osgwindows examples. ------------------------------------------------------------------ I had recommended looking at how SDL hides the Window, but this is almost certainly a better solution. :) If you want to get real crazy you could do something like: # OSG_WINDOW="0 0 1 1" ./myApp ...but that's an abysmal hack, and still ends up showing a little tiny block you can't do anything about. :) > Thanks, in advance, > Phil > > Philip A. Tessier > Northrop Grumman IT > [EMAIL PROTECTED] > 210-867-6775 > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ 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
