Hi Robert, Thanks for the info. Thats useful.
And please don't be angry with names - I am not particular about them. In case if any one cares, it is "Coleman Hawkins". Ages ago in 1961, an artist with a similar name gave a performance "Night Hawk", hence the id. (http://newman1971.wordpress.com/2007/06/02/coleman-hawkins-night-hawk-1961/) Thanks again. On Mon, Mar 24, 2008 at 10:50 PM, Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi "another how I wish they'd use their real name as that's we do in > the real world and it's much nicer and more civil", > > The state sorting in the OSG is done as part of the cull traversals > when the various Drawables and Stateset's are placing in the rendering > backend, composed of RenderBin/RenderStages and a StateGraph. When a > RenderBin is state sorted sorting is done via an STL map container, > sorting purely on the ptr to the StateSet. In the default state > sorting no fine grained start sorting is done - so contents of > StateSet aren't compared. Its possible to enable fine grained state > sorting but I've found that the cost of such sorting generally > outweighs the benefits, what is done by default appears to be a good > compromise between low CPU overhead and efficient use of the GPU. > > Robert. > > > > On Mon, Mar 24, 2008 at 5:13 PM, Night Hawk > <[EMAIL PROTECTED]> wrote: > > Hello All, > > > > I was reading the OSG quick guide and it was mentioned that OSG tries > > to optimize the StateSet changes to be minimal. > > > > So I am trying to understand how exactly the render loop is done. > > Would be done per StateSet as below: > > > > For each StateSet > > { > > Get all the nodes that have this state-set and render them > > } > > > > Or is there some other mechanism? > > > > Also, does any one know what is the cull-mechanism implemented in OSG? > > I read that there are multiple culling mechanisms possible (such as > > BSP heirarchical culling etc...) - not sure though. If someone can > > give some hint, then I will try to look up more on that method to get > > good understanding. > > > > Thank you for any pointers. > > _______________________________________________ > > 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 > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
