BTW, I have a LinePointDistance.py from a PyGame site.  I don't want to post a copy here without permission, but that might help with the broken code of the same name which you've added....

Google is your friend.

http://arainyday.se/projects/python/LinePointDistance/LinePointDistance.py

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.