ABX wrote:
...
> You have to define distance as function and then find where it has minimum.
...

Yes, but as I stated in my original post, the mathematics of this is 
quite complex, it's not as though you're finding the minimum of a 
quadratic equation with one variable. Certainly the mathematics of it is 
quite beyond my abilities, which is why I haven't asked anyone to solve 
it, simply that if they happen to have access to a solution (or if 
they're math mad and really want to create their own solution) to post 
it here.

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