[osg-submissions] FLT export: minor fixes

[Paul Martz]

The warning about GL_POINTS is valid -- No way to create point prim itives
in a FLT file, so they get dropped with warning messages.

The stack trace sort of implies a problem with how my code handles matrices.
Not really a good mapping between OSG and FLT becausse they're first class
citizens in OSG but mere ancillary records in FLT, so my code plays a little
shell game to get that to work, and it's possible I'm dereferencing a NULL
ptr somewhere. I'll take a look at it.

A small reproducer .osg file would be super handy if you could; email me
offline if necessary for security.
   -Paul 

> -----Original Message-----
> From: osg-submissions-bounces at lists.openscenegraph.org 
> [mailto:osg-submissions-bounces at lists.openscenegraph.org] On 
> Behalf Of Robert Osfield
> Sent: Friday, March 28, 2008 1:08 PM
> To: OpenSceneGraph Submissions
> Subject: Re: [osg-submissions] FLT export: minor fixes
> 
> Thanks changes merged and submitted to SVN.
> 
> I have a model here that produces some errors, unfortunately 
> it's not my to redistribute.
> 
> 
> osgconv umemain_new.flt test.ive
> Can't find texture (3) sp_skylt.inta
> Data written to 'test.ive'.
> 
> (normal warning nothing wrong yet)
> 
> Then converting back to .flt :
> 
> osgconv test.ive test.flt
> fltexp: GL_POINTS not supported in FLT export.
> fltexp: GL_POINTS not supported in FLT export.
> fltexp: GL_POINTS not supported in FLT export.
> fltexp: GL_POINTS not supported in FLT export.
> Data written to 'test.flt'.
> 
> Then viewing it:
> 
> osgviewer test.flt
> 
> The model is viewable but object in are positioned wrong.
> 
> Then if I convert from .flt to .flt directly I get a seg fault.
> 
> osgconv umemain_new.flt test.flt
> Can't find texture (3) sp_skylt.inta
> Segmentation fault (core dumped)
> 
> Stack trace:
> 
> (gdb) where
> #0  0x0000000001f21510 in ?? ()
> #1  0x00002aaaaab693f7 in flt::FltExportVisitor::apply () 
> from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #2  0x00002b69d715678f in osg::MatrixTransform::accept () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #3  0x00002b69d7140440 in osg::Group::traverse () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #4  0x00002aaaaab69bc0 in flt::FltExportVisitor::apply () 
> from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #5  0x00002b69d7141d6c in osg::Group::accept () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #6  0x00002b69d7140440 in osg::Group::traverse () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #7  0x00002aaaaab69bc0 in flt::FltExportVisitor::apply () 
> from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #8  0x00002b69d7141d6c in osg::Group::accept () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #9  0x00002b69d7140440 in osg::Group::traverse () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #10 0x00002aaaaab69bc0 in flt::FltExportVisitor::apply () 
> from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #11 0x00002b69d7141d6c in osg::Group::accept () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #12 0x00002b69d7140440 in osg::Group::traverse () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #13 0x00002aaaaab69bc0 in flt::FltExportVisitor::apply () 
> from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #14 0x00002b69d7141d6c in osg::Group::accept () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #15 0x00002b69d7140440 in osg::Group::traverse () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #16 0x00002aaaaab69bd1 in flt::FltExportVisitor::apply () 
> from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #17 0x00002b69d7141d6c in osg::Group::accept () from
> /home/robert/OpenSceneGraph/lib/libosg.so.32
> #18 0x00002aaaaab963d9 in FLTReaderWriter::writeNode () from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> #19 0x00002aaaaab9969a in FLTReaderWriter::writeNode () from 
> /home/robert/OpenSceneGraph/lib/osgPlugins-2.3.6/osgdb_openflight.so
> 
> I don't have a debug build yet though so can't provide line numbers.
> 
> Robert.
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