I just wanted to let you know how I solved my problem: it seems that one has to avoid sending the resize events to OSG when the new size has zero area, that is, the width or height are == 0. Basically I just put the condition "if ( width * height )" in the Qt's resize event handler before dispatching the resize event to OSG.
Cheers, Michele On Mon, Jul 14, 2008 at 11:08 PM, Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi Michele, > > This most likely will be because the viewport is going to 0,0,0,0 size > and messing up projection matrix. I'm afraid I don't have an straight > forward solutions to this - it most likely will require so special > catch code to handle this problem case. > > Robert. > > On Mon, Jul 14, 2008 at 10:05 PM, Michele Bosi <[EMAIL PROTECTED]> wrote: >> I am sure this is a known problem, but looking on the archives didn't >> help, maybe I didn't come up with the right keywords, anyway... I am >> using OSG 2.4 (but the problem was already there since OSG 2.0) under >> both Win XP and Linux, with the Qt4 wrapper and when I resize the >> window to zero width or height and then restore it the content of the >> scene disappears (my program has 3d views that can be temprarily >> hidden/restored). This behaviour seem not to be related to the driver >> but to OSG since with OSG-based programs I get the same problem with >> nVidias as well as with ATIs, while other non-OSG-based programs don't >> show this problem. >> >> I suspect that with a zero-area viewport something breaks into the >> culling mechanism or some division by zero mixes up some OSG internal >> state or matrix. >> Does anyone know how to fix or work around this? do I have to reset >> something once I detect a non-zero area viewport in my resize event >> handler? >> >> Thanks, >> 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
