IMO, it happens that, because of the mirror transformation (i.e. a negative scale factor in the global transformation), back facets do appear as front facets on the projection plane, and viceversa. And because of the 2-sided model lighting, normals are reverted when rendering the front facets (as they appear as back facets). It should be fixed by reverting the front face definition for object transformed by the mirror transform. I mean, I would apply a state set to that mirror transformation with this state attribute:
osg::FrontFace(CLOCKWISE); It worked for me for a similar issue I had in the past. Gianluca -----Original Message----- From: osg-users [mailto:[email protected]] On Behalf Of Ale Maro Sent: Wednesday, September 13, 2017 4:23 PM To: [email protected] Subject: Re: [osg-users] Mirror transformation I forgot to mention that the geode inherit from the root node a 2-sided lighting with different materials in front and back side. Cheers, Ale ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=71707#71707 _______________________________________________ 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
