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45 #include "gromacs/gmxlib/network.h"
46 #include "gromacs/linearalgebra/nrjac.h"
47 #include "gromacs/math/do_fit.h"
48 #include "gromacs/math/functions.h"
49 #include "gromacs/math/vec.h"
50 #include "gromacs/mdrunutility/multisim.h"
51 #include "gromacs/mdtypes/commrec.h"
52 #include "gromacs/mdtypes/fcdata.h"
53 #include "gromacs/mdtypes/inputrec.h"
54 #include "gromacs/mdtypes/mdatom.h"
55 #include "gromacs/mdtypes/state.h"
56 #include "gromacs/pbcutil/ishift.h"
57 #include "gromacs/pbcutil/mshift.h"
58 #include "gromacs/pbcutil/pbc.h"
59 #include "gromacs/topology/ifunc.h"
60 #include "gromacs/topology/mtop_util.h"
61 #include "gromacs/topology/topology.h"
62 #include "gromacs/utility/arrayref.h"
63 #include "gromacs/utility/fatalerror.h"
64 #include "gromacs/utility/pleasecite.h"
65 #include "gromacs/utility/smalloc.h"
70 // TODO This implementation of ensemble orientation restraints is nasty because
71 // a user can't just do multi-sim with single-sim orientation restraints.
73 void init_orires(FILE* fplog,
74 const gmx_mtop_t* mtop,
77 const gmx_multisim_t* ms,
81 od->nr = gmx_mtop_ftype_count(mtop, F_ORIRES);
84 /* Not doing orientation restraints */
88 const int numFitParams = 5;
89 if (od->nr <= numFitParams)
92 "The system has %d orientation restraints, but at least %d are required, since "
93 "there are %d fitting parameters.",
94 od->nr, numFitParams + 1, numFitParams);
97 if (ir->bPeriodicMols)
99 /* Since we apply fitting, we need to make molecules whole and this
100 * can not be done when periodic molecules are present.
103 "Orientation restraints can not be applied when periodic molecules are present "
110 "Orientation restraints do not work with MPI parallelization. Choose 1 MPI rank, "
114 GMX_RELEASE_ASSERT(globalState != nullptr, "We need a valid global state in init_orires");
116 od->fc = ir->orires_fc;
123 int* nr_ex = nullptr;
124 int typeMin = INT_MAX;
126 gmx_mtop_ilistloop_t iloop = gmx_mtop_ilistloop_init(mtop);
128 while (const InteractionLists* il = gmx_mtop_ilistloop_next(iloop, &nmol))
130 const int numOrires = (*il)[F_ORIRES].size();
131 if (nmol > 1 && numOrires > 0)
134 "Found %d copies of a molecule with orientation restrains while the current "
135 "code only supports a single copy. If you want to ensemble average, run "
136 "multiple copies of the system using the multi-sim feature of mdrun.",
140 for (int i = 0; i < numOrires; i += 3)
142 int type = (*il)[F_ORIRES].iatoms[i];
143 int ex = mtop->ffparams.iparams[type].orires.ex;
146 srenew(nr_ex, ex + 1);
147 for (int j = od->nex; j < ex + 1; j++)
153 GMX_ASSERT(nr_ex, "Check for allocated nr_ex to keep the static analyzer happy");
156 typeMin = std::min(typeMin, type);
157 typeMax = std::max(typeMax, type);
160 /* With domain decomposition we use the type index for indexing in global arrays */
162 typeMax - typeMin + 1 == od->nr,
163 "All orientation restraint parameter entries in the topology should be consecutive");
164 /* Store typeMin so we can index array with the type offset */
165 od->typeMin = typeMin;
167 snew(od->S, od->nex);
168 /* When not doing time averaging, the instaneous and time averaged data
169 * are indentical and the pointers can point to the same memory.
171 snew(od->Dinsl, od->nr);
175 snew(od->Dins, od->nr);
179 od->Dins = od->Dinsl;
182 if (ir->orires_tau == 0)
190 snew(od->Dtav, od->nr);
191 od->edt = std::exp(-ir->delta_t / ir->orires_tau);
192 od->edt_1 = 1.0 - od->edt;
194 /* Extend the state with the orires history */
195 globalState->flags |= (1 << estORIRE_INITF);
196 globalState->hist.orire_initf = 1;
197 globalState->flags |= (1 << estORIRE_DTAV);
198 globalState->hist.norire_Dtav = od->nr * 5;
199 snew(globalState->hist.orire_Dtav, globalState->hist.norire_Dtav);
202 snew(od->oinsl, od->nr);
205 snew(od->oins, od->nr);
209 od->oins = od->oinsl;
211 if (ir->orires_tau == 0)
217 snew(od->otav, od->nr);
219 snew(od->tmpEq, od->nex);
222 for (int i = 0; i < mtop->natoms; i++)
224 if (getGroupType(mtop->groups, SimulationAtomGroupType::OrientationRestraintsFit, i) == 0)
229 snew(od->mref, od->nref);
230 snew(od->xref, od->nref);
231 snew(od->xtmp, od->nref);
233 snew(od->eig, od->nex * 12);
235 /* Determine the reference structure on the master node.
236 * Copy it to the other nodes after checking multi compatibility,
237 * so we are sure the subsystems match before copying.
239 auto x = makeArrayRef(globalState->x);
240 rvec com = { 0, 0, 0 };
243 for (const AtomProxy atomP : AtomRange(*mtop))
245 const t_atom& local = atomP.atom();
246 int i = atomP.globalAtomNumber();
247 if (mtop->groups.groupNumbers[SimulationAtomGroupType::OrientationRestraintsFit].empty()
248 || mtop->groups.groupNumbers[SimulationAtomGroupType::OrientationRestraintsFit][i] == 0)
250 /* Not correct for free-energy with changing masses */
251 od->mref[j] = local.m;
252 // Note that only one rank per sim is supported.
255 copy_rvec(x[i], od->xref[j]);
256 for (int d = 0; d < DIM; d++)
258 com[d] += od->mref[j] * x[i][d];
265 svmul(1.0 / mtot, com, com);
268 for (int j = 0; j < od->nref; j++)
270 rvec_dec(od->xref[j], com);
274 fprintf(fplog, "Found %d orientation experiments\n", od->nex);
275 for (int i = 0; i < od->nex; i++)
277 fprintf(fplog, " experiment %d has %d restraints\n", i + 1, nr_ex[i]);
282 fprintf(fplog, " the fit group consists of %d atoms and has total mass %g\n", od->nref, mtot);
286 fprintf(fplog, " the orientation restraints are ensemble averaged over %d systems\n", ms->nsim);
288 check_multi_int(fplog, ms, od->nr, "the number of orientation restraints", FALSE);
289 check_multi_int(fplog, ms, od->nref, "the number of fit atoms for orientation restraining", FALSE);
290 check_multi_int(fplog, ms, ir->nsteps, "nsteps", FALSE);
291 /* Copy the reference coordinates from the master to the other nodes */
292 gmx_sum_sim(DIM * od->nref, od->xref[0], ms);
295 please_cite(fplog, "Hess2003");
298 void diagonalize_orires_tensors(t_oriresdata* od)
300 if (od->M == nullptr)
303 for (int i = 0; i < DIM; i++)
307 snew(od->eig_diag, DIM);
309 for (int i = 0; i < DIM; i++)
315 for (int ex = 0; ex < od->nex; ex++)
317 /* Rotate the S tensor back to the reference frame */
319 mmul(od->R, od->S[ex], TMP);
320 mtmul(TMP, od->R, S);
321 for (int i = 0; i < DIM; i++)
323 for (int j = 0; j < DIM; j++)
325 od->M[i][j] = S[i][j];
330 jacobi(od->M, DIM, od->eig_diag, od->v, &nrot);
333 for (int i = 0; i < DIM; i++)
337 for (int i = 0; i < DIM; i++)
339 for (int j = i + 1; j < DIM; j++)
341 if (gmx::square(od->eig_diag[ord[j]]) > gmx::square(od->eig_diag[ord[i]]))
350 for (int i = 0; i < DIM; i++)
352 od->eig[ex * 12 + i] = od->eig_diag[ord[i]];
354 for (int i = 0; i < DIM; i++)
356 for (int j = 0; j < DIM; j++)
358 od->eig[ex * 12 + 3 + 3 * i + j] = od->v[j][ord[i]];
364 void print_orires_log(FILE* log, t_oriresdata* od)
368 diagonalize_orires_tensors(od);
370 for (int ex = 0; ex < od->nex; ex++)
372 eig = od->eig + ex * 12;
373 fprintf(log, " Orientation experiment %d:\n", ex + 1);
374 fprintf(log, " order parameter: %g\n", eig[0]);
375 for (int i = 0; i < DIM; i++)
377 fprintf(log, " eig: %6.3f %6.3f %6.3f %6.3f\n", (eig[0] != 0) ? eig[i] / eig[0] : eig[i],
378 eig[DIM + i * DIM + XX], eig[DIM + i * DIM + YY], eig[DIM + i * DIM + ZZ]);
384 real calc_orires_dev(const gmx_multisim_t* ms,
386 const t_iatom forceatoms[],
387 const t_iparams ip[],
389 ArrayRef<const RVec> xWholeMolecules,
396 real edt, edt_1, invn, pfac, r2, invr, corrfac, wsv2, sw, dev;
400 rvec * xref, *xtmp, com, r_unrot, r;
403 const real two_thr = 2.0 / 3.0;
409 /* This means that this is not the master node */
411 "Orientation restraints are only supported on the master rank, use fewer ranks");
414 bTAV = (od->edt != 0);
425 od->exp_min_t_tau = hist->orire_initf * edt;
427 /* Correction factor to correct for the lack of history
430 corrfac = 1.0 / (1.0 - od->exp_min_t_tau);
439 invn = 1.0 / ms->nsim;
449 for (int i = 0; i < md->nr; i++)
451 if (md->cORF[i] == 0)
453 copy_rvec(xWholeMolecules[i], xtmp[j]);
454 mref[j] = md->massT[i];
455 for (int d = 0; d < DIM; d++)
457 com[d] += mref[j] * xtmp[j][d];
463 svmul(1.0 / mtot, com, com);
464 for (int j = 0; j < nref; j++)
466 rvec_dec(xtmp[j], com);
468 /* Calculate the rotation matrix to rotate x to the reference orientation */
469 calc_fit_R(DIM, nref, mref, xref, xtmp, od->R);
471 for (int fa = 0; fa < nfa; fa += 3)
473 const int type = forceatoms[fa];
474 const int restraintIndex = type - od->typeMin;
477 pbc_dx_aiuc(pbc, x[forceatoms[fa + 1]], x[forceatoms[fa + 2]], r_unrot);
481 rvec_sub(x[forceatoms[fa + 1]], x[forceatoms[fa + 2]], r_unrot);
483 mvmul(od->R, r_unrot, r);
485 invr = gmx::invsqrt(r2);
486 /* Calculate the prefactor for the D tensor, this includes the factor 3! */
487 pfac = ip[type].orires.c * invr * invr * 3;
488 for (int i = 0; i < ip[type].orires.power; i++)
492 rvec5& Dinsl = od->Dinsl[restraintIndex];
493 Dinsl[0] = pfac * (2 * r[0] * r[0] + r[1] * r[1] - r2);
494 Dinsl[1] = pfac * (2 * r[0] * r[1]);
495 Dinsl[2] = pfac * (2 * r[0] * r[2]);
496 Dinsl[3] = pfac * (2 * r[1] * r[1] + r[0] * r[0] - r2);
497 Dinsl[4] = pfac * (2 * r[1] * r[2]);
501 for (int i = 0; i < 5; i++)
503 od->Dins[restraintIndex][i] = Dinsl[i] * invn;
510 gmx_sum_sim(5 * od->nr, od->Dins[0], ms);
513 /* Calculate the order tensor S for each experiment via optimization */
514 for (int ex = 0; ex < od->nex; ex++)
516 for (int i = 0; i < 5; i++)
518 matEq[ex].rhs[i] = 0;
519 for (int j = 0; j <= i; j++)
521 matEq[ex].mat[i][j] = 0;
526 for (int fa = 0; fa < nfa; fa += 3)
528 const int type = forceatoms[fa];
529 const int restraintIndex = type - od->typeMin;
530 rvec5& Dtav = od->Dtav[restraintIndex];
533 /* Here we update Dtav in t_fcdata using the data in history_t.
534 * Thus the results stay correct when this routine
535 * is called multiple times.
537 for (int i = 0; i < 5; i++)
539 Dtav[i] = edt * hist->orire_Dtav[restraintIndex * 5 + i]
540 + edt_1 * od->Dins[restraintIndex][i];
544 int ex = ip[type].orires.ex;
545 real weight = ip[type].orires.kfac;
546 /* Calculate the vector rhs and half the matrix T for the 5 equations */
547 for (int i = 0; i < 5; i++)
549 matEq[ex].rhs[i] += Dtav[i] * ip[type].orires.obs * weight;
550 for (int j = 0; j <= i; j++)
552 matEq[ex].mat[i][j] += Dtav[i] * Dtav[j] * weight;
556 /* Now we have all the data we can calculate S */
557 for (int ex = 0; ex < od->nex; ex++)
559 OriresMatEq& eq = matEq[ex];
560 /* Correct corrfac and copy one half of T to the other half */
561 for (int i = 0; i < 5; i++)
563 eq.rhs[i] *= corrfac;
564 eq.mat[i][i] *= gmx::square(corrfac);
565 for (int j = 0; j < i; j++)
567 eq.mat[i][j] *= gmx::square(corrfac);
568 eq.mat[j][i] = eq.mat[i][j];
571 m_inv_gen(&eq.mat[0][0], 5, &eq.mat[0][0]);
572 /* Calculate the orientation tensor S for this experiment */
573 matrix& S = od->S[ex];
579 for (int i = 0; i < 5; i++)
581 S[0][0] += 1.5 * eq.mat[0][i] * eq.rhs[i];
582 S[0][1] += 1.5 * eq.mat[1][i] * eq.rhs[i];
583 S[0][2] += 1.5 * eq.mat[2][i] * eq.rhs[i];
584 S[1][1] += 1.5 * eq.mat[3][i] * eq.rhs[i];
585 S[1][2] += 1.5 * eq.mat[4][i] * eq.rhs[i];
590 S[2][2] = -S[0][0] - S[1][1];
593 const matrix* S = od->S;
598 for (int fa = 0; fa < nfa; fa += 3)
600 const int type = forceatoms[fa];
601 const int restraintIndex = type - od->typeMin;
602 const int ex = ip[type].orires.ex;
604 const rvec5& Dtav = od->Dtav[restraintIndex];
605 od->otav[restraintIndex] =
607 * (S[ex][0][0] * Dtav[0] + S[ex][0][1] * Dtav[1] + S[ex][0][2] * Dtav[2]
608 + S[ex][1][1] * Dtav[3] + S[ex][1][2] * Dtav[4]);
611 const rvec5& Dins = od->Dins[restraintIndex];
612 od->oins[restraintIndex] =
614 * (S[ex][0][0] * Dins[0] + S[ex][0][1] * Dins[1] + S[ex][0][2] * Dins[2]
615 + S[ex][1][1] * Dins[3] + S[ex][1][2] * Dins[4]);
619 /* When ensemble averaging is used recalculate the local orientation
620 * for output to the energy file.
622 const rvec5& Dinsl = od->Dinsl[restraintIndex];
623 od->oinsl[restraintIndex] =
625 * (S[ex][0][0] * Dinsl[0] + S[ex][0][1] * Dinsl[1] + S[ex][0][2] * Dinsl[2]
626 + S[ex][1][1] * Dinsl[3] + S[ex][1][2] * Dinsl[4]);
629 dev = od->otav[restraintIndex] - ip[type].orires.obs;
631 wsv2 += ip[type].orires.kfac * gmx::square(dev);
632 sw += ip[type].orires.kfac;
634 od->rmsdev = std::sqrt(wsv2 / sw);
636 /* Rotate the S matrices back, so we get the correct grad(tr(S D)) */
637 for (int ex = 0; ex < od->nex; ex++)
640 tmmul(od->R, od->S[ex], RS);
641 mmul(RS, od->R, od->S[ex]);
646 /* Approx. 120*nfa/3 flops */
650 const t_iatom forceatoms[],
651 const t_iparams ip[],
657 real gmx_unused lambda,
658 real gmx_unused* dvdlambda,
659 const t_mdatoms gmx_unused* md,
661 int gmx_unused* global_atom_index)
663 int ex, power, ki = CENTRAL;
665 real r2, invr, invr2, fc, smooth_fc, dev, devins, pfac;
668 const t_oriresdata* od;
676 bTAV = (od->edt != 0);
681 /* Smoothly switch on the restraining when time averaging is used */
682 smooth_fc *= (1.0 - od->exp_min_t_tau);
685 for (int fa = 0; fa < nfa; fa += 3)
687 const int type = forceatoms[fa];
688 const int ai = forceatoms[fa + 1];
689 const int aj = forceatoms[fa + 2];
690 const int restraintIndex = type - od->typeMin;
693 ki = pbc_dx_aiuc(pbc, x[ai], x[aj], r);
697 rvec_sub(x[ai], x[aj], r);
700 invr = gmx::invsqrt(r2);
702 ex = ip[type].orires.ex;
703 power = ip[type].orires.power;
704 fc = smooth_fc * ip[type].orires.kfac;
705 dev = od->otav[restraintIndex] - ip[type].orires.obs;
708 * there is no real potential when time averaging is applied
710 vtot += 0.5 * fc * gmx::square(dev);
714 /* Calculate the force as the sqrt of tav times instantaneous */
715 devins = od->oins[restraintIndex] - ip[type].orires.obs;
716 if (dev * devins <= 0)
722 dev = std::sqrt(dev * devins);
730 pfac = fc * ip[type].orires.c * invr2;
731 for (int i = 0; i < power; i++)
735 mvmul(od->S[ex], r, Sr);
736 for (int i = 0; i < DIM; i++)
738 fij[i] = -pfac * dev * (4 * Sr[i] - 2 * (2 + power) * invr2 * iprod(Sr, r) * r[i]);
743 ivec_sub(SHIFT_IVEC(g, ai), SHIFT_IVEC(g, aj), dt);
747 for (int i = 0; i < DIM; i++)
753 fshift[ki][i] += fij[i];
754 fshift[CENTRAL][i] -= fij[i];
762 /* Approx. 80*nfa/3 flops */
765 void update_orires_history(const t_fcdata* fcd, history_t* hist)
767 const t_oriresdata* od = &(fcd->orires);
771 /* Copy the new time averages that have been calculated
772 * in calc_orires_dev.
774 hist->orire_initf = od->exp_min_t_tau;
775 for (int pair = 0; pair < od->nr; pair++)
777 for (int i = 0; i < 5; i++)
779 hist->orire_Dtav[pair * 5 + i] = od->Dtav[pair][i];