Hi, How do I retrieve the body axis of the model? I'm thinking of retrieving
the body axis of the model and use it to rotate the model by osg::Quat
rotation(osg::Quat(yaw, body_axis_z)*osg::Quat(roll,
body_axis_y)*osg::Quat(pitch, body_axis_x)); pat->setAttitude(rotation);instead
of osg::Quat rotation(osg::Quat(yaw, osg::Vec3(0,0,1))*osg::Quat(roll,
osg::Vec3(0,1,0))*osg::Quat(pitch, osg:Vec3(1,0,0)));
pat->setAttitude(rotation); so that the aircraft will be rotated correctly.
Thanks. Regards,Cg
From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Wed, 4 Jun 2008 18:04:43
+0100Subject: Re: [osg-users] finding normal of models
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] : 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 CGSent: 04 June
2008 17:27To: OpenSceneGraph UsersSubject: [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
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