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Unit Vector defined by two near points Help
Hello all, I am trying to make a unit vector subroutine for two near points. Given the two points a1, a2 (two triplets of number) I have to define the e=(a2-a1)/distance(a1,a2) {note that a2-a1 is in vector notation}. My problem arises when I have to evaluate the above as a1 tends to a2 and...
