The code I suggested you look is still pretty relevant you just have to
work the algorithms around a bit 
Do a google on glUnProject and glProject, this is not a new topic :)

Gordon
Product Manager 3d
__________________________________________________________
Gordon Tomlinson
Email  : gtomlinson @ overwatch.textron.com
__________________________________________________________


-----Original Message-----
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Hagen
Sent: Wednesday, April 01, 2009 10:11 AM
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] Labeling 3D Nodes with HUD style

Thank you for the fast reply.

But I need the exact opposite of mouse picking.
I want to know the 2d Coordinates given the 3D Coordinates.
So a kind of reverse picking :-)

Thx
 Hagen

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=9539#9539





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