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/*
* $Id$
*
* This source code is part of
*
* G R O M A C S
*
* GROningen MAchine for Chemical Simulations
*
* VERSION 3.2.0
* Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
* Copyright (c) 1991-2000, University of Groningen, The Netherlands.
* Copyright (c) 2001-2004, The GROMACS development team,
* check out http://www.gromacs.org for more information.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* If you want to redistribute modifications, please consider that
* scientific software is very special. Version control is crucial -
* bugs must be traceable. We will be happy to consider code for
* inclusion in the official distribution, but derived work must not
* be called official GROMACS. Details are found in the README & COPYING
* files - if they are missing, get the official version at www.gromacs.org.
*
* To help us fund GROMACS development, we humbly ask that you cite
* the papers on the package - you can find them in the top README file.
*
* For more info, check our website at http://www.gromacs.org
*
* And Hey:
* GRoups of Organic Molecules in ACtion for Science
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define D_BOX_Z 1
#define D_BOX_Y 1
#define D_BOX_X 2
#define N_BOX_Z (2*D_BOX_Z+1)
#define N_BOX_Y (2*D_BOX_Y+1)
#define N_BOX_X (2*D_BOX_X+1)
#define N_IVEC (N_BOX_Z*N_BOX_Y*N_BOX_X)
#define CENTRAL (N_IVEC/2)
#define SHIFTS N_IVEC
#define XYZ2IS(x,y,z) (N_BOX_X*(N_BOX_Y*((z)+D_BOX_Z)+(y)+D_BOX_Y)+(x)+D_BOX_X)
#define IVEC2IS(iv) (XYZ2IS((iv)[XX],(iv)[YY],(iv)[ZZ]))
#define IS2X(iv) (((iv) % N_BOX_X) - D_BOX_X)
#define IS2Y(iv) ((((iv) / N_BOX_X) % N_BOX_Y) - D_BOX_Y)
#define IS2Z(iv) ((iv) / (N_BOX_X*N_BOX_Y) - D_BOX_Z)
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