Melchior FRANZ > Sent: 20 June 2007 16:35 > To: flightgear-devel@lists.sourceforge.net > Subject: Re: [Flightgear-devel] [ANN] OSG - Improved Weather Radar > > > * Vivian Meazza -- Wednesday 20 June 2007: > > Melchior FRANZ > > > I don't say that the radar patch is buggy, it's > > > just the old render-to-texture feature. (It's also not my > > > graphics card driver, as Qt4 has no problems with RTT.) > > > Perhaps this isn't a new bug after all. > > Yes, that's my assumption. I've spent some time on that but > still haven't found the cause. > > Tender-to-texture works in fg/osg and QT4, so it doesn't seem > to be a graphics card driver problem. > > 3D clouds also use RenderTexture but don't cause crashes. So, > what's the difference? Answer: the clouds never call the > RenderTexture destructor! If I comment out "delete rt" in > ~FGODGauge(), then I don't get a crash either. Unfortunately, > I couldn't find out if the destruction is really needed > (calling glXDestroyPbuffer()). The RTT instruments are only > destroyed at exit, and maybe the destruction of the GL > context frees everything, anyway? > > BTW: the TestRenderTexture app in simgear/screen/ does also > not crash, despite calling glXDestroyPbuffer() for mode > changes (Return-key). But it does also not destroy the > RenderTexture class at exit! So is this an acceptable method? > Would commenting out "delete rt" be the solution for 0.9.11? > (And committing the radar patch, of course. :-) >
Hmm, I don't get the crash here, so it is difficult to take a view. On the one hand, if 3D clouds don't call the destructor, then that should be good enough for od-gauge. On the other hand, would not calling the destructor cause memory not to be released on exit? I'll test it here to see if I can detect an adverse effects. Vivian ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
