C  Copyright (c) 2003-2010 University of Florida
C
C  This program is free software; you can redistribute it and/or modify
C  it under the terms of the GNU General Public License as published by
C  the Free Software Foundation; either version 2 of the License, or
C  (at your option) any later version.

C  This program is distributed in the hope that it will be useful,
C  but WITHOUT ANY WARRANTY; without even the implied warranty of
C  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
C  GNU General Public License for more details.

C  The GNU General Public License is included in this distribution
C  in the file COPYRIGHT.

C CALCULATES THE DISTANCE BETWEEN TWO POINTS IN CARTESIAN SPACE

      Double Precision FUNCTION DIST(A,B)
      IMPLICIT DOUBLE PRECISION (A-H,O-Z)
      DIMENSION A(3),B(3)
cYAU - I warn you, expanding all of these out does not ensure Z is positive.
      Z=  (A(1)-B(1))**2
      Z=Z+(A(2)-B(2))**2
      Z=Z+(A(3)-B(3))**2
      DIST = SQRT(Z)
      RETURN
      END

