THETA

Returns the second angle associated with a Body 313 rotation sequence from one coordinate system object to another. This second rotation is referred to as the theta, , angle, and is used in association with the psi, , (1st rotation) and phi, , (3rd rotation) angles.
Positive angular displacement is determined by the right-hand rule.

Format

THETA (Object, Reference Frame)

Arguments

 
Object
Coordinate system object whose rotation is being measured.
Reference Frame
Coordinate system object with respect to which the rotation is being measured.

Example

The following example illustrates the use of the THETA function:
THETA(marker_O, marker_R)See the illustration for PSI.