[GRASSLIST:479] measure lenght of vector

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Hi all:


First, thanks for the help on Flightgear and GPS.  I think I am getting to 
understand it, but right now I'm not doing it.  I'll let you know if I get 
it to work.

Right now, I have a question: how can I measure the lenght of a segment of 
a vector?  I read the docs, but I just don't get it.

TIA

Gustavo

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