00:01
Okay, so euler's angles and three -dimensional motion.
00:06
So euler's angles or eulerian angles are a set of three angles that describe the orientation of a rigid body with respect to a fixed coordinate system.
00:28
Typically, people use theta, phi, and psi.
00:32
This angle right here, the first angle, is typically what we call the angle of rotation about the z -axis, aka the precession angle.
00:51
It describes the rotation of that body around that vertical z -axis.
01:00
The second angle, phi, is the angle of rotation about the x -axis after that first rotation.
01:17
This is called the nutation angle.
01:24
Think of this as the tilt of the body's axis, sort of side to side...