Hi Adrian, I've got my head down dealing with some other complex areas of the OSG right now - it's even a multi-threaded part... so I'm not in a good place to dive into discussion about other complex areas. Give me a week and I'll be a in better position.
Robert. On Wed, May 21, 2008 at 8:01 AM, Adrian Egli OpenSceneGraph (3D) <[EMAIL PROTECTED]> wrote: > Hi Robert, Hi others, > > as you may get from the latest mailing list topics on Parallel Split Shadow > Maps implementation and fixes, we get some flickering effect in the shadow > if we are working in multi-threaded osgShadow.exe example. By add the > --SingleThread parameters, it works fine, no more flickering effect. (some > one reported that they have to add also --screen 0, but this not the same > problem, i guess) so back to the multi-threading issue we have in osg or at > least in pssm. > > i guess the problem comes from a bad synchronisation or may we don't have > yet a the camera synchronised or describted in a dependencie graph. > because in pssm we render (a-c) shadow maps into RTT and then we render the > whole scene as > default viewing camera master m. the a-c should be finish before we start to > render the visible / master camera. because the shadow maps are view > depended to the m. > > what are we doing: > > cull , update all pssm shadow map cameras, render/draw the shadow map > cameras, render the scene with GLSL based on the shadow map texture. > > how can we synchronise this step, it seams not to be enought to work with > render order prerender nestedrender or postrender. > > thanks for short describtion how it works in osg, and how we should fix the > problem we have. > well for the moment we have a robust working PSSM for singlethread, and this > isn't so bad, but it should also work for other settings. > > regards > adrian > > -- > ******************************************** > Adrian Egli > _______________________________________________ > 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
