> Now, I think it is normal to obtain undefined result if I > enable fog without set the other attributes...
If you enable fog, behavior is defined. In OpenGL, the defaults are: FOG_MODE is EXP FOG_DENSITY is 1.0 FOG_COLOR is 0,0,0,0 FOG_COORDINATE_SOURCE is FRAGMENT_DEPTH I don't believe OSG changes any of these, so this should be what an OSG app gets by simply enabling Fog. > But I still > ask me why it worked until yesterday, since I introduced > precipitation two weeks ago! Something else in the code must have changed. It sounds like your app (or some library that it uses) used to set the FOG_MODE to LINEAR, but that code got deleted or changed and you suddenly got EXP instead, resulting in all black. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
