Hi Paul, Different drivers manage compilation and linking in different ways on different drivers so it's hard to give any hard rules.
In general making sure your scene graph is pre-compile before rendering helps avoid most problems with compiles occur during rendering. Robert. On Tue, Apr 28, 2009 at 2:46 AM, <[email protected]> wrote: > > I have multiple shaders. I attach one shader to the root of the scene graph. > I then load in objects and attach one of another set of shaders to the root > of the object and attach it to the main scene graph. When I say "attach a > shader", I'm loading a fragment and vertex shader from a file and attaching > them to a new Program object each time. I then attach the Program object to > the object's state set. > > Is there any performance advantage to doing it this way or creating one > Program object for each shader and attach these same Program object to my > objects. Or should I be creating a set of StateSet's and attaching the > appropriate StateSet to my object based on the Shader I want to use. > > To complicate things, I have multiple cameras used to render to multiple > Frame Buffer Objects. > > What I'm seeing is a (single) missed frame when an object with a "new" shader > appears in the Field of View (running at 120Hz)? > > Could OSG be attempting to "recompile" my shader? Is driver downloading the > shader each time to the video card. > > Paul P. > > > > _______________________________________________ > 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
