Set radius and angle (S)

This command defines a spherical polar coordinate by a radius and two angles; Fii and Beta. Fii is measured from the positive portion of x-axis counterclockwise. Beta angle is measured from the x-y plane. Default values are computed from the vector between the previous active point and current location.

In the example below, location is defined using two different Fii values, 120° and -60°. Value of angle Beta is usually set between -90° to 90° but it is possible to use angle also > 90° as shown in the example.