The PSI function returns the rotation angle of the first rotation in a z-x-z sequence of Euler angles.
Format
Arguments definition
|
Marker1 |
The name or argument number of a marker to be calculated. |
|
Marker2 |
The name or argument number of a marker to be calculated. •If omitted, then the InertiaMarker is applied. |
Formulation
In line with the sequentially defined rotation order, return
rotation angle 
on the z-axis, which is the
first rotation.
Example
PSI (body1.Marker1)
PSI (body1.Marker1, body2.Marker2)
PSI (1,2) <Argument: (1)body1.Marker1, (2)body2.Marker2 >