Hi, Antoine, Yes, I think so, you have to split the non-convex polygon. Convex polygon is convenient to do point-containing test since it is just an AND-combination of half-space. But non-convex polygon is not that simple.
-- Cheers, --- TianZJ At 2017-09-15 01:34:44, "Antoine Rennuit" <antoinerenn...@hotmail.com> wrote: >Dear OSG forum, > >I am currently using PolytopeIntersector with rectangular polygons for >picking. I am thinking of extending this selection mode with polygons than >could potentially be complex, non-convex for instance (e.g. polygons resulting >from hand drawn areas). > >Now I understand that the osg::Polytope class can only handle convex polygons. > >Does that mean that if I want to pick using non-convex polygons I need to >split my non-convex polygon into multiple convex osg::Polytopes and call the >IntersectionVisitor multiple times? Is this handled in OSG? Are there helpers >or should I do all this on the app side? > >Kind regards, > >Antoine. > >------------------ >Read this topic online here: >http://forum.openscenegraph.org/viewtopic.php?p=71725#71725 > > > > > >_______________________________________________ >osg-users mailing list >osg-users@lists.openscenegraph.org >http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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