[osg-users] Disabling rendering
This might sound like an odd question, but is there a way to disable rendering (no culling and no draw) while still allowing intersections. The reason why I am asking is because I have a distributed system - i.e. some applications only performs intersections with the scene without rendering it. In addition, the osg update call must still occur since that's where some of my animation states gets uptate, which will change the outcome of intersection results (like sprites). Cheers, Guy -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=22641#22641 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Disabling rendering
Hi Guy, This might sound like an odd question, but is there a way to disable rendering (no culling and no draw) while still allowing intersections. The reason why I am asking is because I have a distributed system - i.e. some applications only performs intersections with the scene without rendering it. In addition, the osg update call must still occur since that's where some of my animation states gets uptate, which will change the outcome of intersection results (like sprites). Intersections are completely separate from cull and draw, so you can always do intersections even if no rendering is happening. But the hard part is getting the update visitor to run on your subgraph but not the cull visitor (the results of the cull visitor are used for rendering, so if the cull visitor doesn't run on a subgraph then that subgraph will not be rendered). There's a few ways to do it, I guess I would do that with a cull callback set on the root node of the subgraph you don't want to render, and which doesn't call traverse(node, nv);. That way the cull traversal will stop there for that subgraph, and won't visit the children. But since there's no similar update callback, the update traversal will traverse the whole thing. Hope this helps, J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Disabling rendering
Guy Volckaert wrote: This might sound like an odd question, but is there a way to disable rendering (no culling and no draw) while still allowing intersections. The reason why I am asking is because I have a distributed system - i.e. some applications only performs intersections with the scene without rendering it. In addition, the osg update call must still occur since that's where some of my animation states gets uptate, which will change the outcome of intersection results (like sprites). If using osgViewer, don't call viewer.frame(). If you still want the update traversal, run the UpdateVisitor by hand. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Disabling rendering
Paul. Thanks for the advice. What I ended-up doing is overriding the void ViewerBase::frame(double simulationTime) function. Depending on the state of a rendering flag, I either call or don't call the renderingTraversals() function. Hopefully, that won't cause any other issues. Cheers, Guy -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=22648#22648 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
