PHI

 

The PHI function returns the rotation angle of the third 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 φ on the z-axis, which is the third rotation.

 

Example

PHI(body1.Marker1)

PHI(body1.Marker1, body2.Marker2)

PHI(1,2)   <Argument: (1)body1.Marker1, (2)body2.Marker2 >