Actually, I also noticed that OSG v2.8.1 uses version 1.0 of the tristripper library.
As I'm quite in an hurry, I think I will re-implement my own tristripvisitor with the latest version of tristripper and check if this makes a difference. Will let you know what's the result of this test. But I believe this could really be a generic issue (it happens with all the models I tested) and thus would mean many people are currently using "not so well tri-stripped" geometries if they use this optimiser feature ! (it is the case for instance in the OSGExp export plugin for 3DS max as I've noticed this issue there for the first time). regards, Manu. 2009/11/23 Robert Osfield <[email protected]> > Hi Manu, > > If the tristripper doesn't connect the triangles together well then it > can result on few tristrips and lots of unconnected traingles that it > has to put into a single list of triangles to avoid lots of separate > primitive calls. > > As to why your model is not being stripped well I can't say. We've > used 3rd party code to do the tri-stripping so I'm not best placed to > answer the low level questions, but... the original author of the cdoe > Tanguy Fautre is now an OSG user and I believe still on the list so > perhaps he'll be able to chip in ;-) > > Robert. > > On Mon, Nov 23, 2009 at 11:08 AM, Emmanuel Roche > <[email protected]> wrote: > > Hi everyone, > > > > I have a strange problem with the TryStripVisitor: > > > > When I use it on a model (with about 6000 triangles, described as > TRIANGLES > > [thus using 18000 vertices]) I get trip strip primitive sets indeed.... > BUT > > actually I get a few TRIANGLE_STRIP primitive sets with 4 vertices in > each, > > and then a single big TRIANGLES primitive set with about 17950 vertices > !!!! > > > > So, most of the model is just not stripped at all ! any idea what I could > be > > doing wrong ??? > > > > Moreother, I've noticed that the geometry is then transformed as an > indexed > > geometry... correct me if I'm wrong but indexed geometries are slower > that > > simple vertices ordered arrays. If there a way to switch this or am I on > my > > own on this ? > > > > Regards, > > Manu. > > > > > > > > _______________________________________________ > > 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 >
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