include/calch.h

   1 /*
   2  *
   3  *                This source code is part of
   4  *
   5  *                 G   R   O   M   A   C   S
   6  *
   7  *          GROningen MAchine for Chemical Simulations
   8  *
   9  *                        VERSION 3.2.0
  10  * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
  11  * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
  12  * Copyright (c) 2001-2004, The GROMACS development team,
  13  * check out http://www.gromacs.org for more information.
  14
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * If you want to redistribute modifications, please consider that
  21  * scientific software is very special. Version control is crucial -
  22  * bugs must be traceable. We will be happy to consider code for
  23  * inclusion in the official distribution, but derived work must not
  24  * be called official GROMACS. Details are found in the README & COPYING
  25  * files - if they are missing, get the official version at www.gromacs.org.
  26  *
  27  * To help us fund GROMACS development, we humbly ask that you cite
  28  * the papers on the package - you can find them in the top README file.
  29  *
  30  * For more info, check our website at http://www.gromacs.org
  31  *
  32  * And Hey:
  33  * Gromacs Runs On Most of All Computer Systems
  34  */
  35
  36 #ifndef _calch_h
  37 #define _calch_h
  38
  39 #ifdef HAVE_CONFIG_H
  40 #include <config.h>
  41 #endif
  42
  43 #include "typedefs.h"
  44
  45 extern void calc_h_pos(int nht, rvec xa[], rvec xh[], int *l);
  46 /*
  47  *    w.f. van gunsteren, groningen, july 1981
  48  *
  49  *    translated to c d. van der spoel groningen jun 1993
  50  *    added option 5 jan 95
  51  *
  52  *    subroutine genh (nht,nh,na,d,alfa,x)
  53  *
  54  *    genh generates cartesian coordinates for hydrogen atoms
  55  *    using the coordinates of neighbour atoms.
  56  *
  57  *    nht      : type of hydrogen attachment (see manual)
  58  *    xh(1.. ) : atomic positions of the hydrogen atoms that are to be
  59  *               generated
  60  *    xa(1..4) : atomic positions of the control atoms i, j and k and l
  61  *    default bond lengths and angles are defined internally
  62  *
  63  *    l : dynamically changed index
  64  */
  65
  66 #endif  /* _calch_h */