Hi Michele, We should probably add such as catch higher up in the OSG. I'm spinning half a dozen plates at this end so would appreciate if you could chase this up.
Robert. On Tue, Jul 15, 2008 at 9:36 AM, Michele Bosi <[EMAIL PROTECTED]> wrote: > 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 > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
