finding euclidean distance,better code?

[Robert Bossy]

Gabriel Genellina wrote:
> That's what I said in another paragraph. "sum of coordinates" is using a  
> different distance definition; it's the way you measure distance in a city  
> with square blocks. I don't know if the distance itself has a name, but 
I think it is called Manhattan distance in reference of the walking 
distance from one point to another in this city.

RB