The distance formula for x,y is
squareroot((x1 - x2)^2 +(y1-y2)^2).. noz is that
distnorootnoz is the same, without the root(not always needed, takes cpu time)
distnoroot is xyz, with no root, same reason
dist is xyz with root
__________________
++[>++++++<-]>[<++++++>-]<.>++++[>+++++<-]>[<
+++++>-]<+.+++++++..+++.>>+++++[<++++++>-]<+
+.<<+++++++++++++++.>.+++.------.--------.>+.
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