Hi Robert, I'm implementing various sort-last compositing methods using OSG. For depth compositing you need to composite after the opaque data has been rendered but before the transparent data has been rendered. Compositing is actually done with buffer transfers Read Pixels, Texture Images, PBOs, etc...
Since each view has to do different work I just added Geodes with custom drawables to the scene graph which do the required GL action. The problem with this method is I'm adding at least one node for each GPU I want to work with, in some sort-last cases multiple nodes per GPU. This is not a clean implementation in my opinion. So I am looking for other ideas on how I can insert operations in-between rendering bins. - Jason On Wed, May 7, 2008 at 2:59 AM, Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi Jason, > > What do types of operations are you looking to do? > > Robert. > > On Mon, Apr 28, 2008 at 9:58 PM, Jason Baurick <[EMAIL PROTECTED]> wrote: > > Hi, > > > > I recently started working with OSG and I have what is hopefully a > simple > > question. I have a composite viewer with two views, I want to perform > an > > action on the buffers in each view between the opaque rendering and the > > transparent rendering, each view needs to perform a different action. > > Currently to make this work I added two nodes to my scene graph, culled > out > > one for each view and then stuck them in a renderbin between the opaque > and > > transparent bins. So I guess what I'm asking is if there is a simpler > way > > to do this? I tried setting up camera callbacks, but this happens at > the > > wrong point, my next thought would be to overload the draw traversal. > > > > Any suggestions would be welcomed, thank you in advance. > > > > -- > > --Jason Baurick > > > > _______________________________________________ > > 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 > -- --Jason Baurick
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