Hi Wojtek, This morning I awoke and had an idea about why the compile bit be running currently with the update traversal, so I got up and reviewed the code and your test example. First up I can reproduce the problem of the red then green flag on my linux box so when I/we do come up with a solution I do have a chance of confirming the solution works at my end.
The problem itself looks to be caused by the GLObjectOperation which does runs GLObjectVisitor is something that is added to the GraphicsContext's GraphicsThread prior to the RunOperaration which will intigate the rendering of the cameras. What this will mean is that compile will always occur before the rendering of the cameras - this is a good thing. The compile will also happen right away after the realize()/startThreading() and before any barriers/blocks have been joined, now normally this is a good thing i.e. to get the compile done before any serious rendering happens, but and this is this big but, it will run concurrently with the first frames update/event traversal in all non SingleThreaded models, and even concurrently to the first frames cull traversal. So... this is why we have the problem. The solution is either to add a block that prevents the first frame from commencing till all the CompileOperations have been complete, or to move the compile into the osgViewer::Renderer::draw() implementation, so the compile is done after cull, but before the first draw(). The first solution introduces greater internal complexity, the second solution will mean the first frame will be very slow. I'm not clear on what route to take. Doing a hack of the second would probably the first thing to try. Robert. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
