HI A loaded model/node really does not in itself have a normal, its surfaces/tris etc that make up a model will have (or should have ) normal's. So sorry its not possible to retrieve a nodes normal's. In all my years of being involved with vis-sim, you really have to know before hand how your models are orientated, scaled etc , typically your modelling specs should state what is north, what is up, what units are used etc, then these need to be enforced on and followed by the content creators.
Personally I don't know a way of figuring out, in arbitary models what are north, up, right etc.. you have a chance with scale/units. you have to know the orientation details of the models Sorry not much help really __________________________________________________________ Gordon Tomlinson Email : [EMAIL PROTECTED] Website : www.vis-sim.com www.gordontomlinson.com __________________________________________________________ "Self defence is not a function of learning tricks but is a function of how quickly and intensely one can arouse one's instinct for survival" -Master Tambo Tetsura _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of CG Sent: 04 June 2008 17:27 To: OpenSceneGraph Users Subject: [osg-users] finding normal of models Hi, Is it possible to retrieve the Normal of a loaded node (i.e. an aircraft in openflt format)? I need to find out the normal to compute the forward and right axis to construct my rotation matrix to rotate the aircraft correctly in every tick. Right now, when I roll my aircraft to 90 degrees follow by a 90 degrees pitch, the aircraft instead of banking to the right, it rolls 90 degrees to the right and pitches up 90 degrees (as the rotation axis is unchanged). I'm using positiontransformattitude node for the setting of Attitude. Thanks. Regards, Cg _____ Always-on security tools provide safer ways to connect and share anywhere. Find out more. Windows Live <http://get.live.com/familysafety/overview>
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