shake.cpp File Reference

#include "gmxpre.h"
#include "shake.h"
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include "gromacs/gmxlib/nrnb.h"
#include "gromacs/math/functions.h"
#include "gromacs/math/vec.h"
#include "gromacs/mdlib/constr.h"
#include "gromacs/mdlib/splitter.h"
#include "gromacs/mdtypes/inputrec.h"
#include "gromacs/mdtypes/md_enums.h"
#include "gromacs/pbcutil/pbc.h"
#include "gromacs/topology/invblock.h"
#include "gromacs/utility/fatalerror.h"
#include "gromacs/utility/smalloc.h"

Include dependency graph for shake.cpp:

Description

Defines SHAKE code.

Author

David van der Spoel david.nosp@m..van.nosp@m.dersp.nosp@m.oel@.nosp@m.icm.u.nosp@m.u.se

Berk Hess hess@.nosp@m.kth..nosp@m.se

Mark Abraham mark..nosp@m.j.ab.nosp@m.raham.nosp@m.@gma.nosp@m.il.co.nosp@m.m

Functions
static int	gmx::pcomp (const void *p1, const void *p2)
	Compares sort blocks.
static void	gmx::pr_sortblock (FILE *fp, const char *title, int nsb, t_sortblock sb[])
	Prints sortblocks.
static void	gmx::resizeLagrangianData (shakedata *shaked, int ncons)
	Reallocates a vector.
void	gmx::make_shake_sblock_serial (shakedata *shaked, InteractionDefinitions *idef, int numAtoms)
	Make SHAKE blocks when not using DD.
void	gmx::make_shake_sblock_dd (shakedata *shaked, const InteractionList &ilcon)
	Make SHAKE blocks when using DD.
void	gmx::cshake (const int iatom[], int ncon, int *nnit, int maxnit, ArrayRef< const real > constraint_distance_squared, ArrayRef< RVec > positions, const t_pbc *pbc, ArrayRef< const RVec > initial_displacements, ArrayRef< const real > half_of_reduced_mass, real omega, const real invmass[], ArrayRef< const real > distance_squared_tolerance, ArrayRef< real > scaled_lagrange_multiplier, int *nerror)
	Inner kernel for SHAKE constraints. More...
static void	gmx::crattle (const int iatom[], int ncon, int *nnit, int maxnit, ArrayRef< const real > constraint_distance_squared, ArrayRef< RVec > vp, ArrayRef< const RVec > rij, ArrayRef< const real > m2, real omega, const real invmass[], ArrayRef< const real > distance_squared_tolerance, ArrayRef< real > scaled_lagrange_multiplier, int *nerror, real invdt)
	Implements RATTLE (ie. SHAKE for velocity verlet integrators)
static int	gmx::vec_shakef (FILE *fplog, shakedata *shaked, const real invmass[], int ncon, ArrayRef< const t_iparams > ip, const int *iatom, real tol, ArrayRef< const RVec > x, ArrayRef< RVec > prime, const t_pbc *pbc, real omega, bool bFEP, real lambda, ArrayRef< real > scaled_lagrange_multiplier, real invdt, ArrayRef< RVec > v, bool bCalcVir, tensor vir_r_m_dr, ConstraintVariable econq)
	Applies SHAKE.
static void	gmx::check_cons (FILE *log, int nc, ArrayRef< const RVec > x, ArrayRef< const RVec > prime, ArrayRef< const RVec > v, const t_pbc *pbc, ArrayRef< const t_iparams > ip, const int *iatom, const real invmass[], ConstraintVariable econq)
	Check that constraints are satisfied.
static bool	gmx::bshakef (FILE *log, shakedata *shaked, const real invmass[], const InteractionDefinitions &idef, const t_inputrec &ir, ArrayRef< const RVec > x_s, ArrayRef< RVec > prime, const t_pbc *pbc, t_nrnb *nrnb, real lambda, real *dvdlambda, real invdt, ArrayRef< RVec > v, bool bCalcVir, tensor vir_r_m_dr, bool bDumpOnError, ConstraintVariable econq)
	Applies SHAKE.
bool	gmx::constrain_shake (FILE *log,shakedata *shaked,const real invmass[],const InteractionDefinitions &idef,const t_inputrec &ir,ArrayRef< const RVec > x_s,ArrayRef< RVec > xprime,ArrayRef< RVec > vprime,const t_pbc *pbc,t_nrnb *nrnb,real lambda,real *dvdlambda,real invdt,ArrayRef< RVec > v,bool bCalcVir,tensor vir_r_m_dr,bool bDumpOnError,ConstraintVariable econq)
	Shake all the atoms blockwise. It is assumed that all the constraints in the idef->shakes field are sorted, to ascending block nr. The sblock array points into the idef->shakes.iatoms field, with block 0 starting at sblock[0] and running to ( < ) sblock[1], block n running from sblock[n] to sblock[n+1]. Array sblock should be large enough. Return TRUE when OK, FALSE when shake-error.