Shayne,
After retrieving the Quat orientation with getRotate you can use this
snippet:
osg::Vec3d getHPRfromQuat(osg::Quat quat){
// From: http://guardian.curtin.edu.au/cga/faq/angles.html
// Except OSG exchanges pitch & roll from what is listed on that
page
double qx = quat.x();
double qy = quat.y();
double qz = quat.z();
double qw = quat.w();
double sqx = qx * qx;
double sqy = qy * qy;
double sqz = qz * qz;
double sqw = qw * qw;
double term1 = 2*(qx*qy+qw*qz);
double term2 = sqw+sqx-sqy-sqz;
double term3 = -2*(qx*qz-qw*qy);
double term4 = 2*(qw*qx+qy*qz);
double term5 = sqw - sqx - sqy + sqz;
double heading = atan2(term1, term2);
double pitch = atan2(term4, term5);
double roll = asin(term3);
return osg::Vec3d( heading, pitch, roll );
}
--
Roland
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC
Sent: zaterdag 22 november 2008 0:52
To: OpenSceneGraph Users
Subject: [osg-users] extracting heading, pitch, roll from
rotation matrix...
Is there any method or class in OSG that extracts heading,
pitch, and roll angles from a rotation matrix?
I've searched and haven't seen anything. I just want to make
sure there isn't anything out there before I embark on writing my own...
Thanks in advance,
-Shayne
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