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50 #include <sys/types.h>
52 #include "gromacs/awh/read_params.h"
53 #include "gromacs/commandline/pargs.h"
54 #include "gromacs/ewald/ewald_utils.h"
55 #include "gromacs/ewald/pme.h"
56 #include "gromacs/fft/calcgrid.h"
57 #include "gromacs/fileio/confio.h"
58 #include "gromacs/fileio/enxio.h"
59 #include "gromacs/fileio/tpxio.h"
60 #include "gromacs/fileio/trxio.h"
61 #include "gromacs/fileio/warninp.h"
62 #include "gromacs/gmxpreprocess/add_par.h"
63 #include "gromacs/gmxpreprocess/convparm.h"
64 #include "gromacs/gmxpreprocess/gen_maxwell_velocities.h"
65 #include "gromacs/gmxpreprocess/gpp_atomtype.h"
66 #include "gromacs/gmxpreprocess/grompp_impl.h"
67 #include "gromacs/gmxpreprocess/notset.h"
68 #include "gromacs/gmxpreprocess/readir.h"
69 #include "gromacs/gmxpreprocess/tomorse.h"
70 #include "gromacs/gmxpreprocess/topio.h"
71 #include "gromacs/gmxpreprocess/toputil.h"
72 #include "gromacs/gmxpreprocess/vsite_parm.h"
73 #include "gromacs/imd/imd.h"
74 #include "gromacs/math/functions.h"
75 #include "gromacs/math/invertmatrix.h"
76 #include "gromacs/math/units.h"
77 #include "gromacs/math/vec.h"
78 #include "gromacs/mdlib/calc_verletbuf.h"
79 #include "gromacs/mdlib/compute_io.h"
80 #include "gromacs/mdlib/constr.h"
81 #include "gromacs/mdlib/perf_est.h"
82 #include "gromacs/mdlib/qmmm.h"
83 #include "gromacs/mdlib/sim_util.h"
84 #include "gromacs/mdlib/vsite.h"
85 #include "gromacs/mdrunutility/mdmodules.h"
86 #include "gromacs/mdtypes/inputrec.h"
87 #include "gromacs/mdtypes/md_enums.h"
88 #include "gromacs/mdtypes/nblist.h"
89 #include "gromacs/mdtypes/state.h"
90 #include "gromacs/pbcutil/boxutilities.h"
91 #include "gromacs/pbcutil/pbc.h"
92 #include "gromacs/pulling/pull.h"
93 #include "gromacs/random/seed.h"
94 #include "gromacs/topology/ifunc.h"
95 #include "gromacs/topology/mtop_util.h"
96 #include "gromacs/topology/symtab.h"
97 #include "gromacs/topology/topology.h"
98 #include "gromacs/trajectory/trajectoryframe.h"
99 #include "gromacs/utility/arraysize.h"
100 #include "gromacs/utility/cstringutil.h"
101 #include "gromacs/utility/exceptions.h"
102 #include "gromacs/utility/fatalerror.h"
103 #include "gromacs/utility/futil.h"
104 #include "gromacs/utility/gmxassert.h"
105 #include "gromacs/utility/smalloc.h"
106 #include "gromacs/utility/snprintf.h"
108 void MoleculeInformation::initMolInfo()
114 init_t_atoms(&atoms, 0, FALSE);
117 void MoleculeInformation::partialCleanUp()
123 void MoleculeInformation::fullCleanUp()
131 static int rm_interactions(int ifunc, gmx::ArrayRef<MoleculeInformation> mols)
134 /* For all the molecule types */
135 for (auto &mol : mols)
137 n += mol.plist[ifunc].nr;
138 mol.plist[ifunc].nr = 0;
143 static int check_atom_names(const char *fn1, const char *fn2,
144 gmx_mtop_t *mtop, const t_atoms *at)
146 int m, i, j, nmismatch;
148 #define MAXMISMATCH 20
150 if (mtop->natoms != at->nr)
152 gmx_incons("comparing atom names");
157 for (const gmx_molblock_t &molb : mtop->molblock)
159 tat = &mtop->moltype[molb.type].atoms;
160 for (m = 0; m < molb.nmol; m++)
162 for (j = 0; j < tat->nr; j++)
164 if (strcmp( *(tat->atomname[j]), *(at->atomname[i]) ) != 0)
166 if (nmismatch < MAXMISMATCH)
169 "Warning: atom name %d in %s and %s does not match (%s - %s)\n",
170 i+1, fn1, fn2, *(tat->atomname[j]), *(at->atomname[i]));
172 else if (nmismatch == MAXMISMATCH)
174 fprintf(stderr, "(more than %d non-matching atom names)\n", MAXMISMATCH);
186 static void check_eg_vs_cg(gmx_mtop_t *mtop)
188 int astart, m, cg, j, firstj;
189 unsigned char firsteg, eg;
192 /* Go through all the charge groups and make sure all their
193 * atoms are in the same energy group.
197 for (const gmx_molblock_t &molb : mtop->molblock)
199 molt = &mtop->moltype[molb.type];
200 for (m = 0; m < molb.nmol; m++)
202 for (cg = 0; cg < molt->cgs.nr; cg++)
204 /* Get the energy group of the first atom in this charge group */
205 firstj = astart + molt->cgs.index[cg];
206 firsteg = getGroupType(mtop->groups, egcENER, firstj);
207 for (j = molt->cgs.index[cg]+1; j < molt->cgs.index[cg+1]; j++)
209 eg = getGroupType(mtop->groups, egcENER, astart+j);
212 gmx_fatal(FARGS, "atoms %d and %d in charge group %d of molecule type '%s' are in different energy groups",
213 firstj+1, astart+j+1, cg+1, *molt->name);
217 astart += molt->atoms.nr;
222 static void check_cg_sizes(const char *topfn, const t_block *cgs, warninp *wi)
225 char warn_buf[STRLEN];
228 for (cg = 0; cg < cgs->nr; cg++)
230 maxsize = std::max(maxsize, cgs->index[cg+1]-cgs->index[cg]);
233 if (maxsize > MAX_CHARGEGROUP_SIZE)
235 gmx_fatal(FARGS, "The largest charge group contains %d atoms. The maximum is %d.", maxsize, MAX_CHARGEGROUP_SIZE);
237 else if (maxsize > 10)
239 set_warning_line(wi, topfn, -1);
241 "The largest charge group contains %d atoms.\n"
242 "Since atoms only see each other when the centers of geometry of the charge groups they belong to are within the cut-off distance, too large charge groups can lead to serious cut-off artifacts.\n"
243 "For efficiency and accuracy, charge group should consist of a few atoms.\n"
244 "For all-atom force fields use: CH3, CH2, CH, NH2, NH, OH, CO2, CO, etc.",
246 warning_note(wi, warn_buf);
250 static void check_bonds_timestep(const gmx_mtop_t *mtop, double dt, warninp *wi)
252 /* This check is not intended to ensure accurate integration,
253 * rather it is to signal mistakes in the mdp settings.
254 * A common mistake is to forget to turn on constraints
255 * for MD after energy minimization with flexible bonds.
256 * This check can also detect too large time steps for flexible water
257 * models, but such errors will often be masked by the constraints
258 * mdp options, which turns flexible water into water with bond constraints,
259 * but without an angle constraint. Unfortunately such incorrect use
260 * of water models can not easily be detected without checking
261 * for specific model names.
263 * The stability limit of leap-frog or velocity verlet is 4.44 steps
264 * per oscillational period.
265 * But accurate bonds distributions are lost far before that limit.
266 * To allow relatively common schemes (although not common with Gromacs)
267 * of dt=1 fs without constraints and dt=2 fs with only H-bond constraints
268 * we set the note limit to 10.
270 int min_steps_warn = 5;
271 int min_steps_note = 10;
273 int i, a1, a2, w_a1, w_a2, j;
274 real twopi2, limit2, fc, re, m1, m2, period2, w_period2;
275 bool bFound, bWater, bWarn;
276 char warn_buf[STRLEN];
278 /* Get the interaction parameters */
279 gmx::ArrayRef<const t_iparams> ip = mtop->ffparams.iparams;
281 twopi2 = gmx::square(2*M_PI);
283 limit2 = gmx::square(min_steps_note*dt);
288 const gmx_moltype_t *w_moltype = nullptr;
289 for (const gmx_moltype_t &moltype : mtop->moltype)
291 const t_atom *atom = moltype.atoms.atom;
292 const InteractionLists &ilist = moltype.ilist;
293 const InteractionList &ilc = ilist[F_CONSTR];
294 const InteractionList &ils = ilist[F_SETTLE];
295 for (ftype = 0; ftype < F_NRE; ftype++)
297 if (!(ftype == F_BONDS || ftype == F_G96BONDS || ftype == F_HARMONIC))
302 const InteractionList &ilb = ilist[ftype];
303 for (i = 0; i < ilb.size(); i += 3)
305 fc = ip[ilb.iatoms[i]].harmonic.krA;
306 re = ip[ilb.iatoms[i]].harmonic.rA;
307 if (ftype == F_G96BONDS)
309 /* Convert squared sqaure fc to harmonic fc */
312 a1 = ilb.iatoms[i+1];
313 a2 = ilb.iatoms[i+2];
316 if (fc > 0 && m1 > 0 && m2 > 0)
318 period2 = twopi2*m1*m2/((m1 + m2)*fc);
322 period2 = GMX_FLOAT_MAX;
326 fprintf(debug, "fc %g m1 %g m2 %g period %g\n",
327 fc, m1, m2, std::sqrt(period2));
329 if (period2 < limit2)
332 for (j = 0; j < ilc.size(); j += 3)
334 if ((ilc.iatoms[j+1] == a1 && ilc.iatoms[j+2] == a2) ||
335 (ilc.iatoms[j+1] == a2 && ilc.iatoms[j+2] == a1))
340 for (j = 0; j < ils.size(); j += 4)
342 if ((a1 == ils.iatoms[j+1] || a1 == ils.iatoms[j+2] || a1 == ils.iatoms[j+3]) &&
343 (a2 == ils.iatoms[j+1] || a2 == ils.iatoms[j+2] || a2 == ils.iatoms[j+3]))
349 (w_moltype == nullptr || period2 < w_period2))
351 w_moltype = &moltype;
361 if (w_moltype != nullptr)
363 bWarn = (w_period2 < gmx::square(min_steps_warn*dt));
364 /* A check that would recognize most water models */
365 bWater = ((*w_moltype->atoms.atomname[0])[0] == 'O' &&
366 w_moltype->atoms.nr <= 5);
367 sprintf(warn_buf, "The bond in molecule-type %s between atoms %d %s and %d %s has an estimated oscillational period of %.1e ps, which is less than %d times the time step of %.1e ps.\n"
370 w_a1+1, *w_moltype->atoms.atomname[w_a1],
371 w_a2+1, *w_moltype->atoms.atomname[w_a2],
372 std::sqrt(w_period2), bWarn ? min_steps_warn : min_steps_note, dt,
374 "Maybe you asked for fexible water." :
375 "Maybe you forgot to change the constraints mdp option.");
378 warning(wi, warn_buf);
382 warning_note(wi, warn_buf);
387 static void check_vel(gmx_mtop_t *mtop, rvec v[])
389 for (const AtomProxy atomP : AtomRange(*mtop))
391 const t_atom &local = atomP.atom();
392 int i = atomP.globalAtomNumber();
393 if (local.ptype == eptShell ||
394 local.ptype == eptBond ||
395 local.ptype == eptVSite)
402 static void check_shells_inputrec(gmx_mtop_t *mtop,
407 char warn_buf[STRLEN];
409 for (const AtomProxy atomP : AtomRange(*mtop))
411 const t_atom &local = atomP.atom();
412 if (local.ptype == eptShell ||
413 local.ptype == eptBond)
418 if ((nshells > 0) && (ir->nstcalcenergy != 1))
420 set_warning_line(wi, "unknown", -1);
421 snprintf(warn_buf, STRLEN,
422 "There are %d shells, changing nstcalcenergy from %d to 1",
423 nshells, ir->nstcalcenergy);
424 ir->nstcalcenergy = 1;
425 warning(wi, warn_buf);
429 /* TODO Decide whether this function can be consolidated with
430 * gmx_mtop_ftype_count */
431 static int nint_ftype(gmx_mtop_t *mtop, gmx::ArrayRef<const MoleculeInformation> mi, int ftype)
434 for (const gmx_molblock_t &molb : mtop->molblock)
436 nint += molb.nmol*mi[molb.type].plist[ftype].nr;
442 /* This routine reorders the molecule type array
443 * in the order of use in the molblocks,
444 * unused molecule types are deleted.
446 static void renumber_moltypes(gmx_mtop_t *sys,
447 std::vector<MoleculeInformation> *molinfo)
450 std::vector<int> order;
451 for (gmx_molblock_t &molblock : sys->molblock)
453 const auto found = std::find_if(order.begin(), order.end(),
454 [&molblock](const auto &entry)
455 { return molblock.type == entry; });
456 if (found == order.end())
458 /* This type did not occur yet, add it */
459 order.push_back(molblock.type);
460 molblock.type = order.size() - 1;
464 molblock.type = std::distance(order.begin(), found);
468 /* We still need to reorder the molinfo structs */
469 std::vector<MoleculeInformation> minew(order.size());
471 for (auto &mi : *molinfo)
473 const auto found = std::find(order.begin(), order.end(), index);
474 if (found != order.end())
476 int pos = std::distance(order.begin(), found);
481 // Need to manually clean up memory ....
490 static void molinfo2mtop(gmx::ArrayRef<const MoleculeInformation> mi, gmx_mtop_t *mtop)
492 mtop->moltype.resize(mi.size());
494 for (const auto &mol : mi)
496 gmx_moltype_t &molt = mtop->moltype[pos];
497 molt.name = mol.name;
498 molt.atoms = mol.atoms;
499 /* ilists are copied later */
501 molt.excls = mol.excls;
507 new_status(const char *topfile, const char *topppfile, const char *confin,
508 t_gromppopts *opts, t_inputrec *ir, gmx_bool bZero,
509 bool bGenVel, bool bVerbose, t_state *state,
510 PreprocessingAtomTypes *atypes, gmx_mtop_t *sys,
511 std::vector<MoleculeInformation> *mi,
512 std::unique_ptr<MoleculeInformation> *intermolecular_interactions,
513 gmx::ArrayRef<InteractionTypeParameters> plist,
514 int *comb, double *reppow, real *fudgeQQ,
518 std::vector<gmx_molblock_t> molblock;
520 bool ffParametrizedWithHBondConstraints;
522 char warn_buf[STRLEN];
524 /* TOPOLOGY processing */
525 sys->name = do_top(bVerbose, topfile, topppfile, opts, bZero, &(sys->symtab),
526 plist, comb, reppow, fudgeQQ,
527 atypes, mi, intermolecular_interactions,
530 &ffParametrizedWithHBondConstraints,
533 sys->molblock.clear();
536 for (const gmx_molblock_t &molb : molblock)
538 if (!sys->molblock.empty() &&
539 molb.type == sys->molblock.back().type)
541 /* Merge consecutive blocks with the same molecule type */
542 sys->molblock.back().nmol += molb.nmol;
544 else if (molb.nmol > 0)
546 /* Add a new molblock to the topology */
547 sys->molblock.push_back(molb);
549 sys->natoms += molb.nmol*(*mi)[sys->molblock.back().type].atoms.nr;
551 if (sys->molblock.empty())
553 gmx_fatal(FARGS, "No molecules were defined in the system");
556 renumber_moltypes(sys, mi);
560 convert_harmonics(*mi, atypes);
563 if (ir->eDisre == edrNone)
565 i = rm_interactions(F_DISRES, *mi);
568 set_warning_line(wi, "unknown", -1);
569 sprintf(warn_buf, "disre = no, removed %d distance restraints", i);
570 warning_note(wi, warn_buf);
575 i = rm_interactions(F_ORIRES, *mi);
578 set_warning_line(wi, "unknown", -1);
579 sprintf(warn_buf, "orire = no, removed %d orientation restraints", i);
580 warning_note(wi, warn_buf);
584 /* Copy structures from msys to sys */
585 molinfo2mtop(*mi, sys);
587 gmx_mtop_finalize(sys);
589 /* Discourage using the, previously common, setup of applying constraints
590 * to all bonds with force fields that have been parametrized with H-bond
591 * constraints only. Do not print note with large timesteps or vsites.
593 if (opts->nshake == eshALLBONDS &&
594 ffParametrizedWithHBondConstraints &&
595 ir->delta_t < 0.0026 &&
596 gmx_mtop_ftype_count(sys, F_VSITE3FD) == 0)
598 set_warning_line(wi, "unknown", -1);
599 warning_note(wi, "You are using constraints on all bonds, whereas the forcefield "
600 "has been parametrized only with constraints involving hydrogen atoms. "
601 "We suggest using constraints = h-bonds instead, this will also improve performance.");
604 /* COORDINATE file processing */
607 fprintf(stderr, "processing coordinates...\n");
614 read_tps_conf(confin, conftop, nullptr, &x, &v, state->box, FALSE);
615 state->natoms = conftop->atoms.nr;
616 if (state->natoms != sys->natoms)
618 gmx_fatal(FARGS, "number of coordinates in coordinate file (%s, %d)\n"
619 " does not match topology (%s, %d)",
620 confin, state->natoms, topfile, sys->natoms);
622 /* It would be nice to get rid of the copies below, but we don't know
623 * a priori if the number of atoms in confin matches what we expect.
625 state->flags |= (1 << estX);
628 state->flags |= (1 << estV);
630 state_change_natoms(state, state->natoms);
631 std::copy(x, x+state->natoms, state->x.data());
635 std::copy(v, v+state->natoms, state->v.data());
638 /* This call fixes the box shape for runs with pressure scaling */
639 set_box_rel(ir, state);
641 nmismatch = check_atom_names(topfile, confin, sys, &conftop->atoms);
647 sprintf(buf, "%d non-matching atom name%s\n"
648 "atom names from %s will be used\n"
649 "atom names from %s will be ignored\n",
650 nmismatch, (nmismatch == 1) ? "" : "s", topfile, confin);
654 /* If using the group scheme, make sure charge groups are made whole to avoid errors
655 * in calculating charge group size later on
657 if (ir->cutoff_scheme == ecutsGROUP && ir->ePBC != epbcNONE)
659 // Need temporary rvec for coordinates
660 do_pbc_first_mtop(nullptr, ir->ePBC, state->box, sys, state->x.rvec_array());
663 /* Do more checks, mostly related to constraints */
666 fprintf(stderr, "double-checking input for internal consistency...\n");
669 bool bHasNormalConstraints = 0 < (nint_ftype(sys, *mi, F_CONSTR) +
670 nint_ftype(sys, *mi, F_CONSTRNC));
671 bool bHasAnyConstraints = bHasNormalConstraints || 0 < nint_ftype(sys, *mi, F_SETTLE);
672 double_check(ir, state->box,
673 bHasNormalConstraints,
682 snew(mass, state->natoms);
683 for (const AtomProxy atomP : AtomRange(*sys))
685 const t_atom &local = atomP.atom();
686 int i = atomP.globalAtomNumber();
690 if (opts->seed == -1)
692 opts->seed = static_cast<int>(gmx::makeRandomSeed());
693 fprintf(stderr, "Setting gen_seed to %d\n", opts->seed);
695 state->flags |= (1 << estV);
696 maxwell_speed(opts->tempi, opts->seed, sys, state->v.rvec_array());
698 stop_cm(stdout, state->natoms, mass, state->x.rvec_array(), state->v.rvec_array());
703 static void copy_state(const char *slog, t_trxframe *fr,
704 bool bReadVel, t_state *state,
707 if (fr->not_ok & FRAME_NOT_OK)
709 gmx_fatal(FARGS, "Can not start from an incomplete frame");
713 gmx_fatal(FARGS, "Did not find a frame with coordinates in file %s",
717 std::copy(fr->x, fr->x+state->natoms, state->x.data());
722 gmx_incons("Trajecory frame unexpectedly does not contain velocities");
724 std::copy(fr->v, fr->v+state->natoms, state->v.data());
728 copy_mat(fr->box, state->box);
731 *use_time = fr->time;
734 static void cont_status(const char *slog, const char *ener,
735 bool bNeedVel, bool bGenVel, real fr_time,
736 t_inputrec *ir, t_state *state,
738 const gmx_output_env_t *oenv)
739 /* If fr_time == -1 read the last frame available which is complete */
746 bReadVel = (bNeedVel && !bGenVel);
749 "Reading Coordinates%s and Box size from old trajectory\n",
750 bReadVel ? ", Velocities" : "");
753 fprintf(stderr, "Will read whole trajectory\n");
757 fprintf(stderr, "Will read till time %g\n", fr_time);
763 fprintf(stderr, "Velocities generated: "
764 "ignoring velocities in input trajectory\n");
766 read_first_frame(oenv, &fp, slog, &fr, TRX_NEED_X);
770 read_first_frame(oenv, &fp, slog, &fr, TRX_NEED_X | TRX_NEED_V);
776 "WARNING: Did not find a frame with velocities in file %s,\n"
777 " all velocities will be set to zero!\n\n", slog);
778 for (auto &vi : makeArrayRef(state->v))
783 /* Search for a frame without velocities */
785 read_first_frame(oenv, &fp, slog, &fr, TRX_NEED_X);
789 state->natoms = fr.natoms;
791 if (sys->natoms != state->natoms)
793 gmx_fatal(FARGS, "Number of atoms in Topology "
794 "is not the same as in Trajectory");
796 copy_state(slog, &fr, bReadVel, state, &use_time);
798 /* Find the appropriate frame */
799 while ((fr_time == -1 || fr.time < fr_time) &&
800 read_next_frame(oenv, fp, &fr))
802 copy_state(slog, &fr, bReadVel, state, &use_time);
807 /* Set the relative box lengths for preserving the box shape.
808 * Note that this call can lead to differences in the last bit
809 * with respect to using gmx convert-tpr to create a [REF].tpx[ref] file.
811 set_box_rel(ir, state);
813 fprintf(stderr, "Using frame at t = %g ps\n", use_time);
814 fprintf(stderr, "Starting time for run is %g ps\n", ir->init_t);
816 if ((ir->epc != epcNO || ir->etc == etcNOSEHOOVER) && ener)
818 get_enx_state(ener, use_time, &sys->groups, ir, state);
819 preserve_box_shape(ir, state->box_rel, state->boxv);
823 static void read_posres(gmx_mtop_t *mtop,
824 gmx::ArrayRef<const MoleculeInformation> molinfo,
827 int rc_scaling, int ePBC,
837 int natoms, npbcdim = 0;
838 char warn_buf[STRLEN];
839 int a, i, ai, j, k, nat_molb;
843 read_tps_conf(fn, top, nullptr, &x, &v, box, FALSE);
844 natoms = top->atoms.nr;
847 if (natoms != mtop->natoms)
849 sprintf(warn_buf, "The number of atoms in %s (%d) does not match the number of atoms in the topology (%d). Will assume that the first %d atoms in the topology and %s match.", fn, natoms, mtop->natoms, std::min(mtop->natoms, natoms), fn);
850 warning(wi, warn_buf);
853 npbcdim = ePBC2npbcdim(ePBC);
855 if (rc_scaling != erscNO)
857 copy_mat(box, invbox);
858 for (j = npbcdim; j < DIM; j++)
860 clear_rvec(invbox[j]);
863 gmx::invertBoxMatrix(invbox, invbox);
866 /* Copy the reference coordinates to mtop */
870 snew(hadAtom, natoms);
871 for (gmx_molblock_t &molb : mtop->molblock)
873 nat_molb = molb.nmol*mtop->moltype[molb.type].atoms.nr;
874 const InteractionTypeParameters *pr = &(molinfo[molb.type].plist[F_POSRES]);
875 const InteractionTypeParameters *prfb = &(molinfo[molb.type].plist[F_FBPOSRES]);
876 if (pr->nr > 0 || prfb->nr > 0)
878 atom = mtop->moltype[molb.type].atoms.atom;
879 for (i = 0; (i < pr->nr); i++)
881 ai = pr->param[i].ai();
884 gmx_fatal(FARGS, "Position restraint atom index (%d) in moltype '%s' is larger than number of atoms in %s (%d).\n",
885 ai+1, *molinfo[molb.type].name, fn, natoms);
888 if (rc_scaling == erscCOM)
890 /* Determine the center of mass of the posres reference coordinates */
891 for (j = 0; j < npbcdim; j++)
893 sum[j] += atom[ai].m*x[a+ai][j];
895 totmass += atom[ai].m;
898 /* Same for flat-bottomed posres, but do not count an atom twice for COM */
899 for (i = 0; (i < prfb->nr); i++)
901 ai = prfb->param[i].ai();
904 gmx_fatal(FARGS, "Position restraint atom index (%d) in moltype '%s' is larger than number of atoms in %s (%d).\n",
905 ai+1, *molinfo[molb.type].name, fn, natoms);
907 if (rc_scaling == erscCOM && !hadAtom[ai])
909 /* Determine the center of mass of the posres reference coordinates */
910 for (j = 0; j < npbcdim; j++)
912 sum[j] += atom[ai].m*x[a+ai][j];
914 totmass += atom[ai].m;
919 molb.posres_xA.resize(nat_molb);
920 for (i = 0; i < nat_molb; i++)
922 copy_rvec(x[a+i], molb.posres_xA[i]);
927 molb.posres_xB.resize(nat_molb);
928 for (i = 0; i < nat_molb; i++)
930 copy_rvec(x[a+i], molb.posres_xB[i]);
936 if (rc_scaling == erscCOM)
940 gmx_fatal(FARGS, "The total mass of the position restraint atoms is 0");
942 for (j = 0; j < npbcdim; j++)
944 com[j] = sum[j]/totmass;
946 fprintf(stderr, "The center of mass of the position restraint coord's is %6.3f %6.3f %6.3f\n", com[XX], com[YY], com[ZZ]);
949 if (rc_scaling != erscNO)
951 GMX_ASSERT(npbcdim <= DIM, "Only DIM dimensions can have PBC");
953 for (gmx_molblock_t &molb : mtop->molblock)
955 nat_molb = molb.nmol*mtop->moltype[molb.type].atoms.nr;
956 if (!molb.posres_xA.empty() || !molb.posres_xB.empty())
958 std::vector<gmx::RVec> &xp = (!bTopB ? molb.posres_xA : molb.posres_xB);
959 for (i = 0; i < nat_molb; i++)
961 for (j = 0; j < npbcdim; j++)
963 if (rc_scaling == erscALL)
965 /* Convert from Cartesian to crystal coordinates */
966 xp[i][j] *= invbox[j][j];
967 for (k = j+1; k < npbcdim; k++)
969 xp[i][j] += invbox[k][j]*xp[i][k];
972 else if (rc_scaling == erscCOM)
974 /* Subtract the center of mass */
982 if (rc_scaling == erscCOM)
984 /* Convert the COM from Cartesian to crystal coordinates */
985 for (j = 0; j < npbcdim; j++)
987 com[j] *= invbox[j][j];
988 for (k = j+1; k < npbcdim; k++)
990 com[j] += invbox[k][j]*com[k];
1001 static void gen_posres(gmx_mtop_t *mtop,
1002 gmx::ArrayRef<const MoleculeInformation> mi,
1003 const char *fnA, const char *fnB,
1004 int rc_scaling, int ePBC,
1005 rvec com, rvec comB,
1008 read_posres(mtop, mi, FALSE, fnA, rc_scaling, ePBC, com, wi);
1009 /* It is safer to simply read the b-state posres rather than trying
1010 * to be smart and copy the positions.
1012 read_posres(mtop, mi, TRUE, fnB, rc_scaling, ePBC, comB, wi);
1015 static void set_wall_atomtype(PreprocessingAtomTypes *at, t_gromppopts *opts,
1016 t_inputrec *ir, warninp *wi)
1019 char warn_buf[STRLEN];
1023 fprintf(stderr, "Searching the wall atom type(s)\n");
1025 for (i = 0; i < ir->nwall; i++)
1027 ir->wall_atomtype[i] = at->atomTypeFromName(opts->wall_atomtype[i]);
1028 if (ir->wall_atomtype[i] == NOTSET)
1030 sprintf(warn_buf, "Specified wall atom type %s is not defined", opts->wall_atomtype[i]);
1031 warning_error(wi, warn_buf);
1036 static int nrdf_internal(const t_atoms *atoms)
1041 for (i = 0; i < atoms->nr; i++)
1043 /* Vsite ptype might not be set here yet, so also check the mass */
1044 if ((atoms->atom[i].ptype == eptAtom ||
1045 atoms->atom[i].ptype == eptNucleus)
1046 && atoms->atom[i].m > 0)
1053 case 0: nrdf = 0; break;
1054 case 1: nrdf = 0; break;
1055 case 2: nrdf = 1; break;
1056 default: nrdf = nmass*3 - 6; break;
1063 spline1d( double dx,
1075 for (i = 1; i < n-1; i++)
1077 p = 0.5*y2[i-1]+2.0;
1079 q = (y[i+1]-2.0*y[i]+y[i-1])/dx;
1080 u[i] = (3.0*q/dx-0.5*u[i-1])/p;
1085 for (i = n-2; i >= 0; i--)
1087 y2[i] = y2[i]*y2[i+1]+u[i];
1093 interpolate1d( double xmin,
1104 ix = static_cast<int>((x-xmin)/dx);
1106 a = (xmin+(ix+1)*dx-x)/dx;
1107 b = (x-xmin-ix*dx)/dx;
1109 *y = a*ya[ix]+b*ya[ix+1]+((a*a*a-a)*y2a[ix]+(b*b*b-b)*y2a[ix+1])*(dx*dx)/6.0;
1110 *y1 = (ya[ix+1]-ya[ix])/dx-(3.0*a*a-1.0)/6.0*dx*y2a[ix]+(3.0*b*b-1.0)/6.0*dx*y2a[ix+1];
1115 setup_cmap (int grid_spacing,
1117 gmx::ArrayRef<const real> grid,
1118 gmx_cmap_t * cmap_grid)
1120 int i, j, k, ii, jj, kk, idx;
1122 double dx, xmin, v, v1, v2, v12;
1125 std::vector<double> tmp_u(2*grid_spacing, 0.0);
1126 std::vector<double> tmp_u2(2*grid_spacing, 0.0);
1127 std::vector<double> tmp_yy(2*grid_spacing, 0.0);
1128 std::vector<double> tmp_y1(2*grid_spacing, 0.0);
1129 std::vector<double> tmp_t2(2*grid_spacing*2*grid_spacing, 0.0);
1130 std::vector<double> tmp_grid(2*grid_spacing*2*grid_spacing, 0.0);
1132 dx = 360.0/grid_spacing;
1133 xmin = -180.0-dx*grid_spacing/2;
1135 for (kk = 0; kk < nc; kk++)
1137 /* Compute an offset depending on which cmap we are using
1138 * Offset will be the map number multiplied with the
1139 * grid_spacing * grid_spacing * 2
1141 offset = kk * grid_spacing * grid_spacing * 2;
1143 for (i = 0; i < 2*grid_spacing; i++)
1145 ii = (i+grid_spacing-grid_spacing/2)%grid_spacing;
1147 for (j = 0; j < 2*grid_spacing; j++)
1149 jj = (j+grid_spacing-grid_spacing/2)%grid_spacing;
1150 tmp_grid[i*grid_spacing*2+j] = grid[offset+ii*grid_spacing+jj];
1154 for (i = 0; i < 2*grid_spacing; i++)
1156 spline1d(dx, &(tmp_grid[2*grid_spacing*i]), 2*grid_spacing, tmp_u.data(), &(tmp_t2[2*grid_spacing*i]));
1159 for (i = grid_spacing/2; i < grid_spacing+grid_spacing/2; i++)
1161 ii = i-grid_spacing/2;
1164 for (j = grid_spacing/2; j < grid_spacing+grid_spacing/2; j++)
1166 jj = j-grid_spacing/2;
1169 for (k = 0; k < 2*grid_spacing; k++)
1171 interpolate1d(xmin, dx, &(tmp_grid[2*grid_spacing*k]),
1172 &(tmp_t2[2*grid_spacing*k]), psi, &tmp_yy[k], &tmp_y1[k]);
1175 spline1d(dx, tmp_yy.data(), 2*grid_spacing, tmp_u.data(), tmp_u2.data());
1176 interpolate1d(xmin, dx, tmp_yy.data(), tmp_u2.data(), phi, &v, &v1);
1177 spline1d(dx, tmp_y1.data(), 2*grid_spacing, tmp_u.data(), tmp_u2.data());
1178 interpolate1d(xmin, dx, tmp_y1.data(), tmp_u2.data(), phi, &v2, &v12);
1180 idx = ii*grid_spacing+jj;
1181 cmap_grid->cmapdata[kk].cmap[idx*4] = grid[offset+ii*grid_spacing+jj];
1182 cmap_grid->cmapdata[kk].cmap[idx*4+1] = v1;
1183 cmap_grid->cmapdata[kk].cmap[idx*4+2] = v2;
1184 cmap_grid->cmapdata[kk].cmap[idx*4+3] = v12;
1190 static void init_cmap_grid(gmx_cmap_t *cmap_grid, int ngrid, int grid_spacing)
1194 cmap_grid->grid_spacing = grid_spacing;
1195 nelem = cmap_grid->grid_spacing*cmap_grid->grid_spacing;
1197 cmap_grid->cmapdata.resize(ngrid);
1199 for (i = 0; i < ngrid; i++)
1201 cmap_grid->cmapdata[i].cmap.resize(4*nelem);
1206 static int count_constraints(const gmx_mtop_t *mtop,
1207 gmx::ArrayRef<const MoleculeInformation> mi,
1210 int count, count_mol, i;
1214 for (const gmx_molblock_t &molb : mtop->molblock)
1217 gmx::ArrayRef<const InteractionTypeParameters> plist = mi[molb.type].plist;
1219 for (i = 0; i < F_NRE; i++)
1223 count_mol += 3*plist[i].nr;
1225 else if (interaction_function[i].flags & IF_CONSTRAINT)
1227 count_mol += plist[i].nr;
1231 if (count_mol > nrdf_internal(&mi[molb.type].atoms))
1234 "Molecule type '%s' has %d constraints.\n"
1235 "For stability and efficiency there should not be more constraints than internal number of degrees of freedom: %d.\n",
1236 *mi[molb.type].name, count_mol,
1237 nrdf_internal(&mi[molb.type].atoms));
1240 count += molb.nmol*count_mol;
1246 static real calc_temp(const gmx_mtop_t *mtop,
1247 const t_inputrec *ir,
1251 for (const AtomProxy atomP : AtomRange(*mtop))
1253 const t_atom &local = atomP.atom();
1254 int i = atomP.globalAtomNumber();
1255 sum_mv2 += local.m*norm2(v[i]);
1259 for (int g = 0; g < ir->opts.ngtc; g++)
1261 nrdf += ir->opts.nrdf[g];
1264 return sum_mv2/(nrdf*BOLTZ);
1267 static real get_max_reference_temp(const t_inputrec *ir,
1276 for (i = 0; i < ir->opts.ngtc; i++)
1278 if (ir->opts.tau_t[i] < 0)
1284 ref_t = std::max(ref_t, ir->opts.ref_t[i]);
1292 sprintf(buf, "Some temperature coupling groups do not use temperature coupling. We will assume their temperature is not more than %.3f K. If their temperature is higher, the energy error and the Verlet buffer might be underestimated.",
1300 /* Checks if there are unbound atoms in moleculetype molt.
1301 * Prints a note for each unbound atoms and a warning if any is present.
1303 static void checkForUnboundAtoms(const gmx_moltype_t *molt,
1307 const t_atoms *atoms = &molt->atoms;
1311 /* Only one atom, there can't be unbound atoms */
1315 std::vector<int> count(atoms->nr, 0);
1317 for (int ftype = 0; ftype < F_NRE; ftype++)
1319 if (((interaction_function[ftype].flags & IF_BOND) && ftype != F_CONNBONDS) ||
1320 (interaction_function[ftype].flags & IF_CONSTRAINT) ||
1323 const InteractionList &il = molt->ilist[ftype];
1324 const int nral = NRAL(ftype);
1326 for (int i = 0; i < il.size(); i += 1 + nral)
1328 for (int j = 0; j < nral; j++)
1330 count[il.iatoms[i + 1 + j]]++;
1336 int numDanglingAtoms = 0;
1337 for (int a = 0; a < atoms->nr; a++)
1339 if (atoms->atom[a].ptype != eptVSite &&
1344 fprintf(stderr, "\nAtom %d '%s' in moleculetype '%s' is not bound by a potential or constraint to any other atom in the same moleculetype.\n",
1345 a + 1, *atoms->atomname[a], *molt->name);
1351 if (numDanglingAtoms > 0)
1354 sprintf(buf, "In moleculetype '%s' %d atoms are not bound by a potential or constraint to any other atom in the same moleculetype. Although technically this might not cause issues in a simulation, this often means that the user forgot to add a bond/potential/constraint or put multiple molecules in the same moleculetype definition by mistake. Run with -v to get information for each atom.",
1355 *molt->name, numDanglingAtoms);
1356 warning_note(wi, buf);
1360 /* Checks all moleculetypes for unbound atoms */
1361 static void checkForUnboundAtoms(const gmx_mtop_t *mtop,
1365 for (const gmx_moltype_t &molt : mtop->moltype)
1367 checkForUnboundAtoms(&molt, bVerbose, wi);
1371 /*! \brief Checks if there are decoupled modes in moleculetype \p molt.
1373 * The specific decoupled modes this routine check for are angle modes
1374 * where the two bonds are constrained and the atoms a both ends are only
1375 * involved in a single constraint; the mass of the two atoms needs to
1376 * differ by more than \p massFactorThreshold.
1378 static bool haveDecoupledModeInMol(const gmx_moltype_t &molt,
1379 gmx::ArrayRef<const t_iparams> iparams,
1380 real massFactorThreshold)
1382 if (molt.ilist[F_CONSTR].size() == 0 &&
1383 molt.ilist[F_CONSTRNC].size() == 0)
1388 const t_atom * atom = molt.atoms.atom;
1390 t_blocka atomToConstraints =
1391 gmx::make_at2con(molt, iparams,
1392 gmx::FlexibleConstraintTreatment::Exclude);
1394 bool haveDecoupledMode = false;
1395 for (int ftype = 0; ftype < F_NRE; ftype++)
1397 if (interaction_function[ftype].flags & IF_ATYPE)
1399 const int nral = NRAL(ftype);
1400 const InteractionList &il = molt.ilist[ftype];
1401 for (int i = 0; i < il.size(); i += 1 + nral)
1403 /* Here we check for the mass difference between the atoms
1404 * at both ends of the angle, that the atoms at the ends have
1405 * 1 contraint and the atom in the middle at least 3; we check
1406 * that the 3 atoms are linked by constraints below.
1407 * We check for at least three constraints for the middle atom,
1408 * since with only the two bonds in the angle, we have 3-atom
1409 * molecule, which has much more thermal exhange in this single
1410 * angle mode than molecules with more atoms.
1411 * Note that this check also catches molecules where more atoms
1412 * are connected to one or more atoms in the angle, but by
1413 * bond potentials instead of angles. But such cases will not
1414 * occur in "normal" molecules and it doesn't hurt running
1415 * those with higher accuracy settings as well.
1417 int a0 = il.iatoms[1 + i];
1418 int a1 = il.iatoms[1 + i + 1];
1419 int a2 = il.iatoms[1 + i + 2];
1420 if ((atom[a0].m > atom[a2].m*massFactorThreshold ||
1421 atom[a2].m > atom[a0].m*massFactorThreshold) &&
1422 atomToConstraints.index[a0 + 1] - atomToConstraints.index[a0] == 1 &&
1423 atomToConstraints.index[a2 + 1] - atomToConstraints.index[a2] == 1 &&
1424 atomToConstraints.index[a1 + 1] - atomToConstraints.index[a1] >= 3)
1426 int constraint0 = atomToConstraints.a[atomToConstraints.index[a0]];
1427 int constraint2 = atomToConstraints.a[atomToConstraints.index[a2]];
1429 bool foundAtom0 = false;
1430 bool foundAtom2 = false;
1431 for (int conIndex = atomToConstraints.index[a1]; conIndex < atomToConstraints.index[a1 + 1]; conIndex++)
1433 if (atomToConstraints.a[conIndex] == constraint0)
1437 if (atomToConstraints.a[conIndex] == constraint2)
1442 if (foundAtom0 && foundAtom2)
1444 haveDecoupledMode = true;
1451 done_blocka(&atomToConstraints);
1453 return haveDecoupledMode;
1456 /*! \brief Checks if the Verlet buffer and constraint accuracy is sufficient for decoupled dynamic modes.
1458 * When decoupled modes are present and the accuray in insufficient,
1459 * this routine issues a warning if the accuracy is insufficient.
1461 static void checkDecoupledModeAccuracy(const gmx_mtop_t *mtop,
1462 const t_inputrec *ir,
1465 /* We only have issues with decoupled modes with normal MD.
1466 * With stochastic dynamics equipartitioning is enforced strongly.
1473 /* When atoms of very different mass are involved in an angle potential
1474 * and both bonds in the angle are constrained, the dynamic modes in such
1475 * angles have very different periods and significant energy exchange
1476 * takes several nanoseconds. Thus even a small amount of error in
1477 * different algorithms can lead to violation of equipartitioning.
1478 * The parameters below are mainly based on an all-atom chloroform model
1479 * with all bonds constrained. Equipartitioning is off by more than 1%
1480 * (need to run 5-10 ns) when the difference in mass between H and Cl
1481 * is more than a factor 13 and the accuracy is less than the thresholds
1482 * given below. This has been verified on some other molecules.
1484 * Note that the buffer and shake parameters have unit length and
1485 * energy/time, respectively, so they will "only" work correctly
1486 * for atomistic force fields using MD units.
1488 const real massFactorThreshold = 13.0;
1489 const real bufferToleranceThreshold = 1e-4;
1490 const int lincsIterationThreshold = 2;
1491 const int lincsOrderThreshold = 4;
1492 const real shakeToleranceThreshold = 0.005*ir->delta_t;
1494 bool lincsWithSufficientTolerance = (ir->eConstrAlg == econtLINCS && ir->nLincsIter >= lincsIterationThreshold && ir->nProjOrder >= lincsOrderThreshold);
1495 bool shakeWithSufficientTolerance = (ir->eConstrAlg == econtSHAKE && ir->shake_tol <= 1.1*shakeToleranceThreshold);
1496 if (ir->cutoff_scheme == ecutsVERLET &&
1497 ir->verletbuf_tol <= 1.1*bufferToleranceThreshold &&
1498 (lincsWithSufficientTolerance || shakeWithSufficientTolerance))
1503 bool haveDecoupledMode = false;
1504 for (const gmx_moltype_t &molt : mtop->moltype)
1506 if (haveDecoupledModeInMol(molt, mtop->ffparams.iparams,
1507 massFactorThreshold))
1509 haveDecoupledMode = true;
1513 if (haveDecoupledMode)
1515 std::string message = gmx::formatString(
1516 "There are atoms at both ends of an angle, connected by constraints "
1517 "and with masses that differ by more than a factor of %g. This means "
1518 "that there are likely dynamic modes that are only very weakly coupled.",
1519 massFactorThreshold);
1520 if (ir->cutoff_scheme == ecutsVERLET)
1522 message += gmx::formatString(
1523 " To ensure good equipartitioning, you need to either not use "
1524 "constraints on all bonds (but, if possible, only on bonds involving "
1525 "hydrogens) or use integrator = %s or decrease one or more tolerances: "
1526 "verlet-buffer-tolerance <= %g, LINCS iterations >= %d, LINCS order "
1527 ">= %d or SHAKE tolerance <= %g",
1529 bufferToleranceThreshold,
1530 lincsIterationThreshold, lincsOrderThreshold,
1531 shakeToleranceThreshold);
1535 message += gmx::formatString(
1536 " To ensure good equipartitioning, we suggest to switch to the %s "
1537 "cutoff-scheme, since that allows for better control over the Verlet "
1538 "buffer size and thus over the energy drift.",
1539 ecutscheme_names[ecutsVERLET]);
1541 warning(wi, message);
1545 static void set_verlet_buffer(const gmx_mtop_t *mtop,
1551 char warn_buf[STRLEN];
1553 printf("Determining Verlet buffer for a tolerance of %g kJ/mol/ps at %g K\n", ir->verletbuf_tol, buffer_temp);
1555 /* Calculate the buffer size for simple atom vs atoms list */
1556 VerletbufListSetup listSetup1x1;
1557 listSetup1x1.cluster_size_i = 1;
1558 listSetup1x1.cluster_size_j = 1;
1559 const real rlist_1x1 =
1560 calcVerletBufferSize(*mtop, det(box), *ir, ir->nstlist, ir->nstlist - 1,
1561 buffer_temp, listSetup1x1);
1563 /* Set the pair-list buffer size in ir */
1564 VerletbufListSetup listSetup4x4 =
1565 verletbufGetSafeListSetup(ListSetupType::CpuNoSimd);
1567 calcVerletBufferSize(*mtop, det(box), *ir, ir->nstlist, ir->nstlist - 1,
1568 buffer_temp, listSetup4x4);
1570 const int n_nonlin_vsite = countNonlinearVsites(*mtop);
1571 if (n_nonlin_vsite > 0)
1573 sprintf(warn_buf, "There are %d non-linear virtual site constructions. Their contribution to the energy error is approximated. In most cases this does not affect the error significantly.", n_nonlin_vsite);
1574 warning_note(wi, warn_buf);
1577 printf("Calculated rlist for %dx%d atom pair-list as %.3f nm, buffer size %.3f nm\n",
1578 1, 1, rlist_1x1, rlist_1x1-std::max(ir->rvdw, ir->rcoulomb));
1580 printf("Set rlist, assuming %dx%d atom pair-list, to %.3f nm, buffer size %.3f nm\n",
1581 listSetup4x4.cluster_size_i, listSetup4x4.cluster_size_j,
1582 ir->rlist, ir->rlist-std::max(ir->rvdw, ir->rcoulomb));
1584 printf("Note that mdrun will redetermine rlist based on the actual pair-list setup\n");
1586 if (gmx::square(ir->rlist) >= max_cutoff2(ir->ePBC, box))
1588 gmx_fatal(FARGS, "The pair-list cut-off (%g nm) is longer than half the shortest box vector or longer than the smallest box diagonal element (%g nm). Increase the box size or decrease nstlist or increase verlet-buffer-tolerance.", ir->rlist, std::sqrt(max_cutoff2(ir->ePBC, box)));
1592 int gmx_grompp(int argc, char *argv[])
1594 const char *desc[] = {
1595 "[THISMODULE] (the gromacs preprocessor)",
1596 "reads a molecular topology file, checks the validity of the",
1597 "file, expands the topology from a molecular description to an atomic",
1598 "description. The topology file contains information about",
1599 "molecule types and the number of molecules, the preprocessor",
1600 "copies each molecule as needed. ",
1601 "There is no limitation on the number of molecule types. ",
1602 "Bonds and bond-angles can be converted into constraints, separately",
1603 "for hydrogens and heavy atoms.",
1604 "Then a coordinate file is read and velocities can be generated",
1605 "from a Maxwellian distribution if requested.",
1606 "[THISMODULE] also reads parameters for [gmx-mdrun] ",
1607 "(eg. number of MD steps, time step, cut-off), and others such as",
1608 "NEMD parameters, which are corrected so that the net acceleration",
1610 "Eventually a binary file is produced that can serve as the sole input",
1611 "file for the MD program.[PAR]",
1613 "[THISMODULE] uses the atom names from the topology file. The atom names",
1614 "in the coordinate file (option [TT]-c[tt]) are only read to generate",
1615 "warnings when they do not match the atom names in the topology.",
1616 "Note that the atom names are irrelevant for the simulation as",
1617 "only the atom types are used for generating interaction parameters.[PAR]",
1619 "[THISMODULE] uses a built-in preprocessor to resolve includes, macros, ",
1620 "etc. The preprocessor supports the following keywords::",
1623 " #ifndef VARIABLE",
1626 " #define VARIABLE",
1628 " #include \"filename\"",
1629 " #include <filename>",
1631 "The functioning of these statements in your topology may be modulated by",
1632 "using the following two flags in your [REF].mdp[ref] file::",
1634 " define = -DVARIABLE1 -DVARIABLE2",
1635 " include = -I/home/john/doe",
1637 "For further information a C-programming textbook may help you out.",
1638 "Specifying the [TT]-pp[tt] flag will get the pre-processed",
1639 "topology file written out so that you can verify its contents.[PAR]",
1641 "When using position restraints, a file with restraint coordinates",
1642 "must be supplied with [TT]-r[tt] (can be the same file as supplied",
1643 "for [TT]-c[tt]). For free energy calculations, separate reference",
1644 "coordinates for the B topology can be supplied with [TT]-rb[tt],",
1645 "otherwise they will be equal to those of the A topology.[PAR]",
1647 "Starting coordinates can be read from trajectory with [TT]-t[tt].",
1648 "The last frame with coordinates and velocities will be read,",
1649 "unless the [TT]-time[tt] option is used. Only if this information",
1650 "is absent will the coordinates in the [TT]-c[tt] file be used.",
1651 "Note that these velocities will not be used when [TT]gen_vel = yes[tt]",
1652 "in your [REF].mdp[ref] file. An energy file can be supplied with",
1653 "[TT]-e[tt] to read Nose-Hoover and/or Parrinello-Rahman coupling",
1656 "[THISMODULE] can be used to restart simulations (preserving",
1657 "continuity) by supplying just a checkpoint file with [TT]-t[tt].",
1658 "However, for simply changing the number of run steps to extend",
1659 "a run, using [gmx-convert-tpr] is more convenient than [THISMODULE].",
1660 "You then supply the old checkpoint file directly to [gmx-mdrun]",
1661 "with [TT]-cpi[tt]. If you wish to change the ensemble or things",
1662 "like output frequency, then supplying the checkpoint file to",
1663 "[THISMODULE] with [TT]-t[tt] along with a new [REF].mdp[ref] file",
1664 "with [TT]-f[tt] is the recommended procedure. Actually preserving",
1665 "the ensemble (if possible) still requires passing the checkpoint",
1666 "file to [gmx-mdrun] [TT]-cpi[tt].[PAR]",
1668 "By default, all bonded interactions which have constant energy due to",
1669 "virtual site constructions will be removed. If this constant energy is",
1670 "not zero, this will result in a shift in the total energy. All bonded",
1671 "interactions can be kept by turning off [TT]-rmvsbds[tt]. Additionally,",
1672 "all constraints for distances which will be constant anyway because",
1673 "of virtual site constructions will be removed. If any constraints remain",
1674 "which involve virtual sites, a fatal error will result.[PAR]",
1676 "To verify your run input file, please take note of all warnings",
1677 "on the screen, and correct where necessary. Do also look at the contents",
1678 "of the [TT]mdout.mdp[tt] file; this contains comment lines, as well as",
1679 "the input that [THISMODULE] has read. If in doubt, you can start [THISMODULE]",
1680 "with the [TT]-debug[tt] option which will give you more information",
1681 "in a file called [TT]grompp.log[tt] (along with real debug info). You",
1682 "can see the contents of the run input file with the [gmx-dump]",
1683 "program. [gmx-check] can be used to compare the contents of two",
1684 "run input files.[PAR]",
1686 "The [TT]-maxwarn[tt] option can be used to override warnings printed",
1687 "by [THISMODULE] that otherwise halt output. In some cases, warnings are",
1688 "harmless, but usually they are not. The user is advised to carefully",
1689 "interpret the output messages before attempting to bypass them with",
1693 std::vector<MoleculeInformation> mi;
1694 std::unique_ptr<MoleculeInformation> intermolecular_interactions;
1698 const char *mdparin;
1699 bool bNeedVel, bGenVel;
1700 gmx_bool have_atomnumber;
1701 gmx_output_env_t *oenv;
1702 gmx_bool bVerbose = FALSE;
1704 char warn_buf[STRLEN];
1707 { efMDP, nullptr, nullptr, ffREAD },
1708 { efMDP, "-po", "mdout", ffWRITE },
1709 { efSTX, "-c", nullptr, ffREAD },
1710 { efSTX, "-r", "restraint", ffOPTRD },
1711 { efSTX, "-rb", "restraint", ffOPTRD },
1712 { efNDX, nullptr, nullptr, ffOPTRD },
1713 { efTOP, nullptr, nullptr, ffREAD },
1714 { efTOP, "-pp", "processed", ffOPTWR },
1715 { efTPR, "-o", nullptr, ffWRITE },
1716 { efTRN, "-t", nullptr, ffOPTRD },
1717 { efEDR, "-e", nullptr, ffOPTRD },
1718 /* This group is needed by the VMD viewer as the start configuration for IMD sessions: */
1719 { efGRO, "-imd", "imdgroup", ffOPTWR },
1720 { efTRN, "-ref", "rotref", ffOPTRW }
1722 #define NFILE asize(fnm)
1724 /* Command line options */
1725 gmx_bool bRenum = TRUE;
1726 gmx_bool bRmVSBds = TRUE, bZero = FALSE;
1730 { "-v", FALSE, etBOOL, {&bVerbose},
1731 "Be loud and noisy" },
1732 { "-time", FALSE, etREAL, {&fr_time},
1733 "Take frame at or first after this time." },
1734 { "-rmvsbds", FALSE, etBOOL, {&bRmVSBds},
1735 "Remove constant bonded interactions with virtual sites" },
1736 { "-maxwarn", FALSE, etINT, {&maxwarn},
1737 "Number of allowed warnings during input processing. Not for normal use and may generate unstable systems" },
1738 { "-zero", FALSE, etBOOL, {&bZero},
1739 "Set parameters for bonded interactions without defaults to zero instead of generating an error" },
1740 { "-renum", FALSE, etBOOL, {&bRenum},
1741 "Renumber atomtypes and minimize number of atomtypes" }
1744 /* Parse the command line */
1745 if (!parse_common_args(&argc, argv, 0, NFILE, fnm, asize(pa), pa,
1746 asize(desc), desc, 0, nullptr, &oenv))
1751 /* Initiate some variables */
1752 gmx::MDModules mdModules;
1753 t_inputrec irInstance;
1754 t_inputrec *ir = &irInstance;
1756 snew(opts->include, STRLEN);
1757 snew(opts->define, STRLEN);
1759 wi = init_warning(TRUE, maxwarn);
1761 /* PARAMETER file processing */
1762 mdparin = opt2fn("-f", NFILE, fnm);
1763 set_warning_line(wi, mdparin, -1);
1766 get_ir(mdparin, opt2fn("-po", NFILE, fnm), &mdModules, ir, opts, WriteMdpHeader::yes, wi);
1768 GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR;
1772 fprintf(stderr, "checking input for internal consistency...\n");
1774 check_ir(mdparin, ir, opts, wi);
1776 if (ir->ld_seed == -1)
1778 ir->ld_seed = static_cast<int>(gmx::makeRandomSeed());
1779 fprintf(stderr, "Setting the LD random seed to %" PRId64 "\n", ir->ld_seed);
1782 if (ir->expandedvals->lmc_seed == -1)
1784 ir->expandedvals->lmc_seed = static_cast<int>(gmx::makeRandomSeed());
1785 fprintf(stderr, "Setting the lambda MC random seed to %d\n", ir->expandedvals->lmc_seed);
1788 bNeedVel = EI_STATE_VELOCITY(ir->eI);
1789 bGenVel = (bNeedVel && opts->bGenVel);
1790 if (bGenVel && ir->bContinuation)
1793 "Generating velocities is inconsistent with attempting "
1794 "to continue a previous run. Choose only one of "
1795 "gen-vel = yes and continuation = yes.");
1796 warning_error(wi, warn_buf);
1799 std::array<InteractionTypeParameters, F_NRE> plist;
1802 PreprocessingAtomTypes atypes;
1805 pr_symtab(debug, 0, "Just opened", &sys.symtab);
1808 const char *fn = ftp2fn(efTOP, NFILE, fnm);
1809 if (!gmx_fexist(fn))
1811 gmx_fatal(FARGS, "%s does not exist", fn);
1815 new_status(fn, opt2fn_null("-pp", NFILE, fnm), opt2fn("-c", NFILE, fnm),
1816 opts, ir, bZero, bGenVel, bVerbose, &state,
1817 &atypes, &sys, &mi, &intermolecular_interactions,
1818 plist, &comb, &reppow, &fudgeQQ,
1824 pr_symtab(debug, 0, "After new_status", &sys.symtab);
1828 /* set parameters for virtual site construction (not for vsiten) */
1829 for (size_t mt = 0; mt < sys.moltype.size(); mt++)
1832 set_vsites(bVerbose, &sys.moltype[mt].atoms, &atypes, mi[mt].plist);
1834 /* now throw away all obsolete bonds, angles and dihedrals: */
1835 /* note: constraints are ALWAYS removed */
1838 for (size_t mt = 0; mt < sys.moltype.size(); mt++)
1840 clean_vsite_bondeds(mi[mt].plist, sys.moltype[mt].atoms.nr, bRmVSBds);
1844 if (ir->cutoff_scheme == ecutsVERLET)
1846 fprintf(stderr, "Removing all charge groups because cutoff-scheme=%s\n",
1847 ecutscheme_names[ir->cutoff_scheme]);
1849 /* Remove all charge groups */
1850 gmx_mtop_remove_chargegroups(&sys);
1853 if ((count_constraints(&sys, mi, wi) != 0) && (ir->eConstrAlg == econtSHAKE))
1855 if (ir->eI == eiCG || ir->eI == eiLBFGS)
1857 sprintf(warn_buf, "Can not do %s with %s, use %s",
1858 EI(ir->eI), econstr_names[econtSHAKE], econstr_names[econtLINCS]);
1859 warning_error(wi, warn_buf);
1861 if (ir->bPeriodicMols)
1863 sprintf(warn_buf, "Can not do periodic molecules with %s, use %s",
1864 econstr_names[econtSHAKE], econstr_names[econtLINCS]);
1865 warning_error(wi, warn_buf);
1869 if (EI_SD (ir->eI) && ir->etc != etcNO)
1871 warning_note(wi, "Temperature coupling is ignored with SD integrators.");
1874 /* If we are doing QM/MM, check that we got the atom numbers */
1875 have_atomnumber = TRUE;
1876 for (int i = 0; i < gmx::ssize(atypes); i++)
1878 have_atomnumber = have_atomnumber && (atypes.atomNumberFromAtomType(i) >= 0);
1880 if (!have_atomnumber && ir->bQMMM)
1884 "It appears as if you are trying to run a QM/MM calculation, but the force\n"
1885 "field you are using does not contain atom numbers fields. This is an\n"
1886 "optional field (introduced in GROMACS 3.3) for general runs, but mandatory\n"
1887 "for QM/MM. The good news is that it is easy to add - put the atom number as\n"
1888 "an integer just before the mass column in ffXXXnb.itp.\n"
1889 "NB: United atoms have the same atom numbers as normal ones.\n\n");
1892 /* Check for errors in the input now, since they might cause problems
1893 * during processing further down.
1895 check_warning_error(wi, FARGS);
1897 if (nint_ftype(&sys, mi, F_POSRES) > 0 ||
1898 nint_ftype(&sys, mi, F_FBPOSRES) > 0)
1900 if (ir->epc == epcPARRINELLORAHMAN || ir->epc == epcMTTK)
1902 sprintf(warn_buf, "You are combining position restraints with %s pressure coupling, which can lead to instabilities. If you really want to combine position restraints with pressure coupling, we suggest to use %s pressure coupling instead.",
1903 EPCOUPLTYPE(ir->epc), EPCOUPLTYPE(epcBERENDSEN));
1904 warning_note(wi, warn_buf);
1907 const char *fn = opt2fn("-r", NFILE, fnm);
1910 if (!gmx_fexist(fn))
1913 "Cannot find position restraint file %s (option -r).\n"
1914 "From GROMACS-2018, you need to specify the position restraint "
1915 "coordinate files explicitly to avoid mistakes, although you can "
1916 "still use the same file as you specify for the -c option.", fn);
1919 if (opt2bSet("-rb", NFILE, fnm))
1921 fnB = opt2fn("-rb", NFILE, fnm);
1922 if (!gmx_fexist(fnB))
1925 "Cannot find B-state position restraint file %s (option -rb).\n"
1926 "From GROMACS-2018, you need to specify the position restraint "
1927 "coordinate files explicitly to avoid mistakes, although you can "
1928 "still use the same file as you specify for the -c option.", fn);
1938 fprintf(stderr, "Reading position restraint coords from %s", fn);
1939 if (strcmp(fn, fnB) == 0)
1941 fprintf(stderr, "\n");
1945 fprintf(stderr, " and %s\n", fnB);
1948 gen_posres(&sys, mi, fn, fnB,
1949 ir->refcoord_scaling, ir->ePBC,
1950 ir->posres_com, ir->posres_comB,
1954 /* If we are using CMAP, setup the pre-interpolation grid */
1955 if (plist[F_CMAP].ncmap() > 0)
1957 init_cmap_grid(&sys.ffparams.cmap_grid, plist[F_CMAP].cmapAngles, plist[F_CMAP].cmakeGridSpacing);
1958 setup_cmap(plist[F_CMAP].cmakeGridSpacing, plist[F_CMAP].cmapAngles, plist[F_CMAP].cmap, &sys.ffparams.cmap_grid);
1961 set_wall_atomtype(&atypes, opts, ir, wi);
1964 atypes.renumberTypes(plist, &sys, ir->wall_atomtype, bVerbose);
1967 if (ir->implicit_solvent)
1969 gmx_fatal(FARGS, "Implicit solvation is no longer supported");
1972 /* PELA: Copy the atomtype data to the topology atomtype list */
1973 atypes.copyTot_atomtypes(&(sys.atomtypes));
1977 pr_symtab(debug, 0, "After atype.renumberTypes", &sys.symtab);
1982 fprintf(stderr, "converting bonded parameters...\n");
1985 const int ntype = atypes.size();
1986 convertInteractionTypeParameters(ntype, plist, mi, intermolecular_interactions.get(),
1987 comb, reppow, fudgeQQ, &sys);
1991 pr_symtab(debug, 0, "After converInteractionTypeParameters", &sys.symtab);
1994 /* set ptype to VSite for virtual sites */
1995 for (gmx_moltype_t &moltype : sys.moltype)
1997 set_vsites_ptype(FALSE, &moltype);
2001 pr_symtab(debug, 0, "After virtual sites", &sys.symtab);
2003 /* Check velocity for virtual sites and shells */
2006 check_vel(&sys, state.v.rvec_array());
2009 /* check for shells and inpurecs */
2010 check_shells_inputrec(&sys, ir, wi);
2013 check_mol(&sys, wi);
2015 checkForUnboundAtoms(&sys, bVerbose, wi);
2017 for (const gmx_moltype_t &moltype : sys.moltype)
2019 check_cg_sizes(ftp2fn(efTOP, NFILE, fnm), &moltype.cgs, wi);
2022 if (EI_DYNAMICS(ir->eI) && ir->eI != eiBD)
2024 check_bonds_timestep(&sys, ir->delta_t, wi);
2027 checkDecoupledModeAccuracy(&sys, ir, wi);
2029 if (EI_ENERGY_MINIMIZATION(ir->eI) && 0 == ir->nsteps)
2031 warning_note(wi, "Zero-step energy minimization will alter the coordinates before calculating the energy. If you just want the energy of a single point, try zero-step MD (with unconstrained_start = yes). To do multiple single-point energy evaluations of different configurations of the same topology, use mdrun -rerun.");
2034 check_warning_error(wi, FARGS);
2038 fprintf(stderr, "initialising group options...\n");
2040 do_index(mdparin, ftp2fn_null(efNDX, NFILE, fnm),
2044 if (ir->cutoff_scheme == ecutsVERLET && ir->verletbuf_tol > 0)
2046 if (EI_DYNAMICS(ir->eI) && inputrec2nboundeddim(ir) == 3)
2050 if (EI_MD(ir->eI) && ir->etc == etcNO)
2054 buffer_temp = opts->tempi;
2058 buffer_temp = calc_temp(&sys, ir, state.v.rvec_array());
2060 if (buffer_temp > 0)
2062 sprintf(warn_buf, "NVE simulation: will use the initial temperature of %.3f K for determining the Verlet buffer size", buffer_temp);
2063 warning_note(wi, warn_buf);
2067 sprintf(warn_buf, "NVE simulation with an initial temperature of zero: will use a Verlet buffer of %d%%. Check your energy drift!",
2068 gmx::roundToInt(verlet_buffer_ratio_NVE_T0*100));
2069 warning_note(wi, warn_buf);
2074 buffer_temp = get_max_reference_temp(ir, wi);
2077 if (EI_MD(ir->eI) && ir->etc == etcNO && buffer_temp == 0)
2079 /* NVE with initial T=0: we add a fixed ratio to rlist.
2080 * Since we don't actually use verletbuf_tol, we set it to -1
2081 * so it can't be misused later.
2083 ir->rlist *= 1.0 + verlet_buffer_ratio_NVE_T0;
2084 ir->verletbuf_tol = -1;
2088 /* We warn for NVE simulations with a drift tolerance that
2089 * might result in a 1(.1)% drift over the total run-time.
2090 * Note that we can't warn when nsteps=0, since we don't
2091 * know how many steps the user intends to run.
2093 if (EI_MD(ir->eI) && ir->etc == etcNO && ir->nstlist > 1 &&
2096 const real driftTolerance = 0.01;
2097 /* We use 2 DOF per atom = 2kT pot+kin energy,
2098 * to be on the safe side with constraints.
2100 const real totalEnergyDriftPerAtomPerPicosecond = 2*BOLTZ*buffer_temp/(ir->nsteps*ir->delta_t);
2102 if (ir->verletbuf_tol > 1.1*driftTolerance*totalEnergyDriftPerAtomPerPicosecond)
2104 sprintf(warn_buf, "You are using a Verlet buffer tolerance of %g kJ/mol/ps for an NVE simulation of length %g ps, which can give a final drift of %d%%. For conserving energy to %d%% when using constraints, you might need to set verlet-buffer-tolerance to %.1e.",
2105 ir->verletbuf_tol, ir->nsteps*ir->delta_t,
2106 gmx::roundToInt(ir->verletbuf_tol/totalEnergyDriftPerAtomPerPicosecond*100),
2107 gmx::roundToInt(100*driftTolerance),
2108 driftTolerance*totalEnergyDriftPerAtomPerPicosecond);
2109 warning_note(wi, warn_buf);
2113 set_verlet_buffer(&sys, ir, buffer_temp, state.box, wi);
2118 /* Init the temperature coupling state */
2119 init_gtc_state(&state, ir->opts.ngtc, 0, ir->opts.nhchainlength); /* need to add nnhpres here? */
2123 fprintf(stderr, "Checking consistency between energy and charge groups...\n");
2125 check_eg_vs_cg(&sys);
2129 pr_symtab(debug, 0, "After index", &sys.symtab);
2132 triple_check(mdparin, ir, &sys, wi);
2133 close_symtab(&sys.symtab);
2136 pr_symtab(debug, 0, "After close", &sys.symtab);
2139 /* make exclusions between QM atoms and remove charges if needed */
2142 if (ir->QMMMscheme == eQMMMschemenormal && ir->ns_type == ensSIMPLE)
2144 gmx_fatal(FARGS, "electrostatic embedding only works with grid neighboursearching, use ns-type=grid instead\n");
2148 generate_qmexcl(&sys, ir, wi, GmxQmmmMode::GMX_QMMM_ORIGINAL);
2150 if (ir->QMMMscheme != eQMMMschemeoniom)
2152 std::vector<int> qmmmAtoms = qmmmAtomIndices(*ir, sys);
2153 removeQmmmAtomCharges(&sys, qmmmAtoms);
2157 if (ir->eI == eiMimic)
2159 generate_qmexcl(&sys, ir, wi, GmxQmmmMode::GMX_QMMM_MIMIC);
2162 if (ftp2bSet(efTRN, NFILE, fnm))
2166 fprintf(stderr, "getting data from old trajectory ...\n");
2168 cont_status(ftp2fn(efTRN, NFILE, fnm), ftp2fn_null(efEDR, NFILE, fnm),
2169 bNeedVel, bGenVel, fr_time, ir, &state, &sys, oenv);
2172 if (ir->ePBC == epbcXY && ir->nwall != 2)
2174 clear_rvec(state.box[ZZ]);
2177 if (ir->cutoff_scheme != ecutsVERLET && ir->rlist > 0)
2179 set_warning_line(wi, mdparin, -1);
2180 check_chargegroup_radii(&sys, ir, state.x.rvec_array(), wi);
2183 if (EEL_FULL(ir->coulombtype) || EVDW_PME(ir->vdwtype))
2185 /* Calculate the optimal grid dimensions */
2187 EwaldBoxZScaler boxScaler(*ir);
2188 boxScaler.scaleBox(state.box, scaledBox);
2190 if (ir->nkx > 0 && ir->nky > 0 && ir->nkz > 0)
2192 /* Mark fourier_spacing as not used */
2193 ir->fourier_spacing = 0;
2195 else if (ir->nkx != 0 && ir->nky != 0 && ir->nkz != 0)
2197 set_warning_line(wi, mdparin, -1);
2198 warning_error(wi, "Some of the Fourier grid sizes are set, but all of them need to be set.");
2200 const int minGridSize = minimalPmeGridSize(ir->pme_order);
2201 calcFftGrid(stdout, scaledBox, ir->fourier_spacing, minGridSize,
2202 &(ir->nkx), &(ir->nky), &(ir->nkz));
2203 if (ir->nkx < minGridSize ||
2204 ir->nky < minGridSize ||
2205 ir->nkz < minGridSize)
2207 warning_error(wi, "The PME grid size should be >= 2*(pme-order - 1); either manually increase the grid size or decrease pme-order");
2211 /* MRS: eventually figure out better logic for initializing the fep
2212 values that makes declaring the lambda and declaring the state not
2213 potentially conflict if not handled correctly. */
2214 if (ir->efep != efepNO)
2216 state.fep_state = ir->fepvals->init_fep_state;
2217 for (i = 0; i < efptNR; i++)
2219 /* init_lambda trumps state definitions*/
2220 if (ir->fepvals->init_lambda >= 0)
2222 state.lambda[i] = ir->fepvals->init_lambda;
2226 if (ir->fepvals->all_lambda[i] == nullptr)
2228 gmx_fatal(FARGS, "Values of lambda not set for a free energy calculation!");
2232 state.lambda[i] = ir->fepvals->all_lambda[i][state.fep_state];
2238 pull_t *pull = nullptr;
2242 pull = set_pull_init(ir, &sys, state.x.rvec_array(), state.box, state.lambda[efptMASS], wi);
2245 /* Modules that supply external potential for pull coordinates
2246 * should register those potentials here. finish_pull() will check
2247 * that providers have been registerd for all external potentials.
2252 setStateDependentAwhParams(ir->awhParams, ir->pull, pull,
2253 state.box, ir->ePBC, &ir->opts, wi);
2263 set_reference_positions(ir->rot, state.x.rvec_array(), state.box,
2264 opt2fn("-ref", NFILE, fnm), opt2bSet("-ref", NFILE, fnm),
2268 /* reset_multinr(sys); */
2270 if (EEL_PME(ir->coulombtype))
2272 float ratio = pme_load_estimate(&sys, ir, state.box);
2273 fprintf(stderr, "Estimate for the relative computational load of the PME mesh part: %.2f\n", ratio);
2274 /* With free energy we might need to do PME both for the A and B state
2275 * charges. This will double the cost, but the optimal performance will
2276 * then probably be at a slightly larger cut-off and grid spacing.
2278 if ((ir->efep == efepNO && ratio > 1.0/2.0) ||
2279 (ir->efep != efepNO && ratio > 2.0/3.0))
2282 "The optimal PME mesh load for parallel simulations is below 0.5\n"
2283 "and for highly parallel simulations between 0.25 and 0.33,\n"
2284 "for higher performance, increase the cut-off and the PME grid spacing.\n");
2285 if (ir->efep != efepNO)
2288 "For free energy simulations, the optimal load limit increases from 0.5 to 0.667\n");
2294 char warn_buf[STRLEN];
2295 double cio = compute_io(ir, sys.natoms, &sys.groups, F_NRE, 1);
2296 sprintf(warn_buf, "This run will generate roughly %.0f Mb of data", cio);
2299 set_warning_line(wi, mdparin, -1);
2300 warning_note(wi, warn_buf);
2304 printf("%s\n", warn_buf);
2310 fprintf(stderr, "writing run input file...\n");
2313 done_warning(wi, FARGS);
2314 write_tpx_state(ftp2fn(efTPR, NFILE, fnm), ir, &state, &sys);
2316 /* Output IMD group, if bIMD is TRUE */
2317 write_IMDgroup_to_file(ir->bIMD, ir, &state, &sys, NFILE, fnm);
2319 sfree(opts->define);
2320 sfree(opts->include);
2323 for (auto &mol : mi)
2325 // Some of the contents of molinfo have been stolen, so
2326 // fullCleanUp can't be called.
2327 mol.partialCleanUp();
2329 done_inputrec_strings();
2330 output_env_done(oenv);