Generates the shortest line between two keypoints on an area.
First keypoint of line to be generated. If
P, graphical picking is enabled and all remaining command fields are ignored
(valid only in the GUI).
Second keypoint of line to be generated.
or area to which generated line is to be parallel.
Generates the shortest line between two keypoints,
both of which lie on an area. The generated line will also lie on the area.
P2 may also
be equidistant (in global Cartesian space) from the area (and on the same
side of the area), in which case a line parallel to the area is generated.