Hi One reason is that you can construct very optimal triangular meshes, that take you through the fast path on the graphics pipe, 4+ polygonal are not a optimizeable as the triangles, so unless you really need to preserve the polygonal shape I would recommend just using the triangles and let the tools in OSG the loaders and the optimizer you can run over you nodes do their best
Gordon Tomlinson Product Manager 3d Technology & Project Wyvern Overwatch® An Operating Unit of Textron Systems -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dario Minieri Sent: Tuesday, April 20, 2010 8:59 AM To: [email protected] Subject: Re: [osg-users] Untriangulate Meshes... Hi Michael Thanks for you reply. Yes, the wireframe view shows triangle instead 4gons. This isn't a real problem for me when you say: > (b) because triangle lists are faster to render than separate polygons. I'm not very familiar with 3D "inside" concepts, but I thought that having fewer polygons (though with 4 vertices) could be better, in terms of render time and memory, which have fully triangulated model. So, I'm in wrong? :D Many thanks Bye Michael Platings wrote: > Hi Dario, > no the FBX reader doesn't necessarily have to triangulate the mesh, I just > wrote it that way (a) for simplicity and (b) because triangle lists are > faster to render than separate polygons. > Presumably you're viewing the model in wireframe - are the extra lines a > major issue for your application? > > On 19 April 2010 19:59, Dario Minieri < ()> wrote: > > > Hi Gordon > > > > Simply, if I have a model with mesh consisting of polygons with 4 vertices > > (no others n-gons), it must necessarily be triangulated? The osgViewer > > always shows the triangulated models even though they are not originally. > > > > Many thanks > > > > Best Regards > > > > > > Tomlinson, Gordon wrote: > > > > > What do you define a 'untriangolate mesh' to be ? > > > > > > > > > > > > Gordon Tomlinson > > > Product Manager 3d Technology & Project Wyvern > > > Overwatch(r) > > > An Operating Unit of Textron Systems > > > > > > -----Original Message----- > > > From: > > > > > > > > > > [mailto:] On Behalf Of Dario > > > Minieri > > > Sent: Monday, April 19, 2010 10:11 AM > > > To: > > > > > > > > > > Subject: Untriangulate Meshes... > > > > > > Hi, > > > > > > Sorry for my noob question: OSG is unable to handle untriangolate > > > meshes? > > > > > > Thank you! > > > > > > Cheers, > > > Dario > > > > > > ------------------ > > > Read this topic online here: > > > http://forum.openscenegraph.org/viewtopic.php?p=26947#26947 > > > (http://forum.openscenegraph.org/viewtopic.php?p=26947#26947) > > > > > > > > > > > > > > > > > > _______________________________________________ > > > osg-users mailing list > > > > > > > > > > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or > > > (http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or) > > > g > > > _______________________________________________ > > > osg-users mailing list > > > > > > > > > > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > (http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org) > > > > > > > > > > > > > ------------------ > > > Post generated by Mail2Forum > > > > > > > > > ------------------ > > Read this topic online here: > > > > http://forum.openscenegraph.org/viewtopic.php?p=26961#26961 > > (http://forum.openscenegraph.org/viewtopic.php?p=26961#26961) > > > > > > > > > > > > > > _______________________________________________ > > osg-users mailing list > > () > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > (http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org) > > > > > > > > > ------------------ > Post generated by Mail2Forum > ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=27003#27003 _______________________________________________ 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
