Hi Joel, It rather sounds like you are trying to over complicate things.
The OSG will report errors in shaders to the console, and you can up the vebosity of the debug messages by setting the OSG_NOTIFY_LEVEL to DEBUG. This output level will included all the shader code passed to OpenGL as well as all the errors. Robert. On Thu, Oct 20, 2011 at 7:07 PM, Joel Graff <[email protected]> wrote: > Hi, > > I have a postdraw callback attached to the viewer camera which looks for any > shaders with error logs and flags them for removal. I have a separate > callback that then iterates those flags and removes them accordingly. > > However, to make the shaders accessible to my postdraw callback, I had to > keep references to them in the draw callback instance. It worked fine, but > it's a bit of a pain to manage. So, I'm looking for a little better way of > doing that. > > My best thought at the moment is: > > 1. Create a postdrawNodeVisitor with 'apply (osg::Program&)' as an overload. > All post-draw shader manipulation is encapsulated there. > > 2. Add my camera as a child of the scenegraph's root node (which isn't > rendered by the camera). > > 3. In my postdraw callback, call camera->getParent( 0 )->accept ( > postdrawNodeVisitor ); > > The solution appears to be good enough - I don't need to traverse the graph > every time to do shader maintenance (only when they get added or removed from > the graph), so the postdraw would trigger a traversal only when necessary. > > However, it just seems a bit odd to add the camera as a child to the root > node to get the job done. Is there some other linkage to the scene graph > available from a camera's post draw? > > Thanks, > > Joel > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=43476#43476 > > > > > > _______________________________________________ > 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
