position-length

Arguments: position

Returns:

(sqrt (+ (square (position-x position))
         (square (position-y position))))

This is the Euclidean length of the two-dimensional vector represented by position. (allegro:square squares its argument). (See position-x and position-y.)

Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.