Angle arguments

The angle argument is used to represent the yaw (horizontal) angle in degrees. The value returned from this argument range from -180.0 (inclusive) to 180 (exclusive), with -180.0 being due north:

$$\begin{array}{ccc}& N(-180°)& \\ & \uparrow & \\ & & \\ & & \\ W(90°)\leftarrow & \bullet & \to E(-90°)\\ & & \\ & & \\ & \downarrow & \\ & S(0°)& \end{array}$$

The ~ notation can be used to specify a rotation relative to the executor's yaw angle.