include/gpp_nextnb.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
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   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
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  34  */
  35
  36 #ifndef _gpp_nextnb_h
  37 #define _gpp_nextnb_h
  38
  39 #include "grompp.h"
  40
  41 typedef struct {
  42   int nr;               /* nr atoms (0 <= i < nr) (atoms->nr)           */
  43   int nrex;             /* with nrex lists of neighbours                */
  44                         /* respectively containing zeroth, first        */
  45                         /* second etc. neigbours (0 <= nre < nrex)      */
  46   int **nrexcl;         /* with (0 <= nrx < nrexcl[i][nre]) neigbours   */
  47                         /* per list stored in one 2d array of lists     */
  48   int ***a;             /* like this: a[i][nre][nrx]                    */
  49 } t_nextnb;
  50
  51 extern void init_nnb(t_nextnb *nnb, int nr, int nrex);
  52 /* Initiate the arrays for nnb (see above) */
  53
  54 extern void done_nnb(t_nextnb *nnb);
  55 /* Cleanup the nnb struct */
  56
  57 #ifdef DEBUG_NNB
  58 #define print_nnb(nnb, s) __print_nnb(nnb, s)
  59 extern void print_nnb(t_nextnb *nnb, char *s);
  60 /* Print the nnb struct */
  61 #else
  62 #define print_nnb(nnb, s)
  63 #endif
  64
  65 extern void gen_nnb(t_nextnb *nnb,t_params plist[]);
  66 /* Generate a t_nextnb structure from bond information.
  67  * With the structure you can either generate exclusions
  68  * or generate angles and dihedrals. The structure must be
  69  * initiated using init_nnb.
  70  */
  71
  72 extern void nnb2excl (t_nextnb *nnb, t_blocka *excl);
  73 /* generate exclusions from nnb */
  74
  75 extern void generate_excl (int nrexcl, int nratoms,
  76                            t_params plist[],t_nextnb *nnb,t_blocka *excl);
  77 /* Generate an exclusion block from bonds and constraints in
  78  * plist.
  79  */
  80
  81 #endif  /* _gpp_nextnb_h */