Yes, I've done this as well, pretty easy to write, just allows you to
position the camera in altitude and azimuth while maintaining an up vector.
I'd say it's more common in sim apps than CAD apps, though.
I see someone else has posted code for this.
Paul Martz
Skew Matrix Software LLC <> 
+1 303 859 9466


[] On Behalf Of Richard
Baron Penman
Sent: Wednesday, April 22, 2009 12:44 AM
To: OpenSceneGraph Users
Subject: [osg-users] CAD style rotation


I am after an osgManipulator with CAD style rotation. 
In a typical CAD program the rotation keeps the roll fixed and orbits around
the centre of the screen.
In contrast the TrackballManipulator allows the roll to change and rotates
around the origin.

Has anyone come across code that implements this type of rotation?


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