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/*
* Copyright (C) 1998, 2000-2007, 2010, 2011, 2012, 2013 SINTEF ICT,
* Applied Mathematics, Norway.
*
* Contact information: E-mail: tor.dokken@sintef.no
* SINTEF ICT, Department of Applied Mathematics,
* P.O. Box 124 Blindern,
* 0314 Oslo, Norway.
*
* This file is part of SISL.
*
* SISL is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* SISL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with SISL. If not, see
* <http://www.gnu.org/licenses/>.
*
* In accordance with Section 7(b) of the GNU Affero General Public
* License, a covered work must retain the producer line in every data
* file that is created or manipulated using SISL.
*
* Other Usage
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the SISL library without
* disclosing the source code of your own applications.
*
* This file may be used in accordance with the terms contained in a
* written agreement between you and SINTEF ICT.
*/
#include "sisl-copyright.h"
/*
*
* $Id: s6dist.c,v 1.2 2001-03-19 15:59:01 afr Exp $
*
*/
#define S6DIST
#include "sislP.h"
#if defined(SISLNEEDPROTOTYPES)
double
s6dist(double epoint1[],double epoint2[],int idim)
#else
double s6dist(epoint1,epoint2,idim)
double epoint1[];
double epoint2[];
int idim;
#endif
/*
*********************************************************************
*
*********************************************************************
*
* PURPOSE : Compute the distance between the points epoint1 and
* epoint2.
*
*
*
* INPUT : epoint1 - First point in distance calculation.
* epoint2 - Second point in distance calculation.
* idim - Dimension of the space in which the points lie.
*
*
*
* OUTPUT : s6dist - Distance between the points.
*
*
* METHOD : Compute lenght of the vector epoint1-epoint2.
*
*
* REFERENCES :
*
*-
* CALLS :
*
* WRITTEN BY : Vibeke Skytt, SI, 88-06.
*
*********************************************************************
*/
{
register double *s1,*s2,*s3; /* Pointers used to travers epoint1 and epoint2
arrays. */
register double tdist=DZERO; /* Distance between the points. */
for (s1=epoint1,s2=epoint2,s3=epoint1+idim; s1<s3; s1++,s2++)
tdist += (*s1 - *s2)*(*s1 - *s2);
return(sqrt(tdist));
}
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