Regarding getting yaw, pitch, roll separately frm 'vizconnect.getEuler('trac') functn

[Jeff]

The getEuler() command return a list with yaw, pitch, and roll. You can get the individual values directly:

yaw,pitch,roll = vizconnect.getTracker('HeadTracker').getEuler()

Or first save the list and then get the individual values:

ori = vizconnect.getTracker('HeadTracker').getEuler()
yaw = ori[0]
pitch = ori[1]
roll = ori[2]