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.)

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Documentation for Allegro CL version 8.0. This page was not revised from the 7.0 page.
Created 2005.12.9.