PTLINEDIST
THE BOX'S MAIN HELP:
This function returns the perpendicular distance between a point Q and the line defined by A and B.
A (input):
This is the first point of the line.
B (input):
This is the second point of the line.
Q (input):
The function returns the perpendicular distance between this point, Q and the line.
OUT (output):
This function returns the perpendicular distance between a point Q and the line defined by A and B.