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Comparing trunk/OOPSE/libmdtools/Integrator.hpp (file contents):
Revision 562 by gezelter, Fri Jun 20 20:50:17 2003 UTC vs.
Revision 1198 by tim, Thu May 27 00:48:12 2004 UTC

# Line 1 | Line 1
1   #ifndef _INTEGRATOR_H_
2   #define _INTEGRATOR_H_
3  
4 + #include <string>
5 + #include <vector>
6   #include "Atom.hpp"
7 + #include "StuntDouble.hpp"
8 + #include "Molecule.hpp"
9   #include "SRI.hpp"
10   #include "AbstractClasses.hpp"
11   #include "SimInfo.hpp"
12   #include "ForceFields.hpp"
13   #include "Thermo.hpp"
14   #include "ReadWrite.hpp"
15 + #include "ZConsWriter.hpp"
16 + #include "Restraints.hpp"
17  
18 + using namespace std;
19   const double kB = 8.31451e-7;// boltzmann constant amu*Ang^2*fs^-2/K
20   const double eConvert = 4.184e-4; // converts kcal/mol -> amu*A^2/fs^2
21 + const double p_convert = 1.63882576e8; //converts amu*fs^-2*Ang^-1 -> atm
22   const int maxIteration = 300;
23   const double tol = 1.0e-6;
24  
25 < class Integrator : public BaseIntegrator {
25 > template<typename T = BaseIntegrator> class Integrator : public T {
26  
27   public:
28    Integrator( SimInfo *theInfo, ForceFields* the_ff );
29    virtual ~Integrator();
30    void integrate( void );
31 +  virtual double  getConservedQuantity(void);
32 +  virtual string getAdditionalParameters(void);
33  
24 –
34   protected:
35 <  
35 >
36    virtual void integrateStep( int calcPot, int calcStress );
37    virtual void preMove( void );
38    virtual void moveA( void );
# Line 31 | Line 40 | class Integrator : public BaseIntegrator { (protected)
40    virtual void constrainA( void );
41    virtual void constrainB( void );
42    virtual int  readyCheck( void ) { return 1; }
34 –  
35 –  void checkConstraints( void );
36 –  void rotate( int axes1, int axes2, double angle, double j[3],
37 –               double A[9] );
43  
44 +  virtual void resetIntegrator( void ) { }
45  
46 +  virtual void calcForce( int calcPot, int calcStress );
47 +  virtual void thermalize();
48 +
49 +  virtual bool stopIntegrator() {return false;}
50 +
51 +  virtual void rotationPropagation( StuntDouble* sd, double ji[3] );
52 +
53 +  void checkConstraints( void );
54 +  void rotate( int axes1, int axes2, double angle, double j[3],
55 +         double A[3][3] );
56 +
57    ForceFields* myFF;
58  
59    SimInfo *info; // all the info we'll ever need
60 +  vector<StuntDouble*> integrableObjects;
61    int nAtoms;  /* the number of atoms */
62    int oldAtoms;
63    Atom **atoms; /* array of atom pointers */
# Line 47 | Line 65 | class Integrator : public BaseIntegrator { (protected)
65    int nMols;
66  
67    int isConstrained; // boolean to know whether the systems contains
68 <                     // constraints.
69 <  int nConstrained;  // counter for number of constraints
70 <  int *constrainedA; // the i of a constraint pair
71 <  int *constrainedB; // the j of a constraint pair
72 <  double *constrainedDsqr; // the square of the constraint distance
73 <  
68 >         // constraints.
69 >  int nConstrained;  // counter for number of constraints
70 >  int *constrainedA; // the i of a constraint pair
71 >  int *constrainedB; // the j of a constraint pair
72 >  double *constrainedDsqr; // the square of the constraint distance
73 >
74    int* moving; // tells whether we are moving atom i
75    int* moved;  // tells whether we have moved atom i
76 <  double* oldPos; // pre constrained positions
76 >  double* oldPos; // pre constrained positions
77  
78    short isFirst; /*boolean for the first time integrate is called */
79 <  
79 >
80    double dt;
81    double dt2;
82  
65 –  double* pos;
66 –  double* vel;
67 –  double* frc;
68 –  double* trq;
69 –  double* Amat;
70 –
83    Thermo *tStats;
84    StatWriter*  statOut;
85    DumpWriter*  dumpOut;
86 <  
86 >
87   };
88  
89 < class NVE : public Integrator{
89 > typedef Integrator<BaseIntegrator> RealIntegrator;
90  
91 + // ansi instantiation
92 + template class Integrator<BaseIntegrator>;
93 +
94 + template<typename T> class NVE : public T {
95 +
96   public:
97    NVE ( SimInfo *theInfo, ForceFields* the_ff ):
98 <    Integrator( theInfo, the_ff ){}
98 >    T( theInfo, the_ff ){}
99    virtual ~NVE(){}
83 –
84 –  
85 –
100   };
101  
88 – class NVT : public Integrator{
102  
103 + template<typename T> class NVT : public T {
104 +
105   public:
106  
107    NVT ( SimInfo *theInfo, ForceFields* the_ff);
108 <  virtual ~NVT() {}
108 >  virtual ~NVT();
109  
95 –  void setQmass(double q) {qmass = q; have_qmass = 1;}
110    void setTauThermostat(double tt) {tauThermostat = tt; have_tau_thermostat=1;}
111    void setTargetTemp(double tt) {targetTemp = tt; have_target_temp = 1;}
112 +  void setChiTolerance(double tol) {chiTolerance = tol;}
113 +  virtual double  getConservedQuantity(void);
114 +  virtual string getAdditionalParameters(void);
115  
116   protected:
117  
# Line 103 | Line 120 | class NVT : public Integrator{ (protected)
120  
121    virtual int readyCheck();
122  
123 <  // zeta is a propagated degree of freedom.
123 >  virtual void resetIntegrator( void );
124  
125 <  double zeta;
125 >  // chi is a propagated degree of freedom.
126  
127 <  // targetTemp must be set.  One of qmass or tauThermostat must be set;
127 >  double chi;
128  
129 <  double qmass;
129 >  //integral of chi(t)dt
130 >  double integralOfChidt;
131 >
132 >  // targetTemp must be set.  tauThermostat must also be set;
133 >
134    double targetTemp;
135    double tauThermostat;
136  
137 <  double NkBT;
117 <  
118 <  short int have_tau_thermostat, have_target_temp, have_qmass;
137 >  short int have_tau_thermostat, have_target_temp;
138  
139 +  double *oldVel;
140 +  double *oldJi;
141 +
142 +  double chiTolerance;
143 +  short int have_chi_tolerance;
144 +
145   };
146  
147  
123 – class NPT : public Integrator{
148  
149 + template<typename T> class NPT : public T{
150 +
151   public:
152  
153    NPT ( SimInfo *theInfo, ForceFields* the_ff);
154 <  virtual ~NPT() {};
154 >  virtual ~NPT();
155  
156 <  void setQmass(double q) {qmass = q; have_qmass = 1;}
156 >  virtual void integrateStep( int calcPot, int calcStress ){
157 >    calcStress = 1;
158 >    T::integrateStep( calcPot, calcStress );
159 >  }
160 >
161 >  virtual double getConservedQuantity(void) = 0;
162 >  virtual string getAdditionalParameters(void) = 0;
163 >  
164 >  double myTauThermo( void ) { return tauThermostat; }
165 >  double myTauBaro( void ) { return tauBarostat; }
166 >
167    void setTauThermostat(double tt) {tauThermostat = tt; have_tau_thermostat=1;}
168    void setTauBarostat(double tb) {tauBarostat = tb; have_tau_barostat=1;}
169    void setTargetTemp(double tt) {targetTemp = tt; have_target_temp = 1;}
170    void setTargetPressure(double tp) {targetPressure = tp; have_target_pressure = 1;}
171 +  void setChiTolerance(double tol) {chiTolerance = tol; have_chi_tolerance = 1;}
172 +  void setPosIterTolerance(double tol) {posIterTolerance = tol; have_pos_iter_tolerance = 1;}
173 +  void setEtaTolerance(double tol) {etaTolerance = tol; have_eta_tolerance = 1;}
174  
175   protected:
176  
# Line 140 | Line 179 | class NPT : public Integrator{ (protected)
179  
180    virtual int readyCheck();
181  
182 <  // zeta and epsilonDot are the propagated degrees of freedom.
182 >  virtual void resetIntegrator( void );
183  
184 <  double zeta;
185 <  double epsilonDot;
184 >  virtual void getVelScaleA( double sc[3], double vel[3] ) = 0;
185 >  virtual void getVelScaleB( double sc[3], int index ) = 0;
186 >  virtual void getPosScale(double pos[3], double COM[3],
187 >                           int index, double sc[3]) = 0;
188  
189 <  // targetTemp, targetPressure, and tauBarostat must be set.  
189 >  virtual void calcVelScale( void ) = 0;
190 >
191 >  virtual bool chiConverged( void );
192 >  virtual bool etaConverged( void ) = 0;
193 >
194 >  virtual void evolveChiA( void );
195 >  virtual void evolveEtaA( void ) = 0;
196 >  virtual void evolveChiB( void );
197 >  virtual void evolveEtaB( void ) = 0;
198 >
199 >  virtual void scaleSimBox( void ) = 0;
200 >
201 >  void accIntegralOfChidt(void) { integralOfChidt += dt * chi;}
202 >
203 >  // chi and eta are the propagated degrees of freedom
204 >
205 >  double oldChi;
206 >  double prevChi;
207 >  double chi;
208 >  double NkBT;
209 >  double fkBT;
210 >
211 >  double tt2, tb2;
212 >  double instaTemp, instaPress, instaVol;
213 >  double press[3][3];
214 >
215 >  int Nparticles;
216 >
217 >  double integralOfChidt;
218 >
219 >  // targetTemp, targetPressure, and tauBarostat must be set.
220    // One of qmass or tauThermostat must be set;
221  
151 –  double qmass;
222    double targetTemp;
223    double targetPressure;
224    double tauThermostat;
225    double tauBarostat;
226  
227    short int have_tau_thermostat, have_tau_barostat, have_target_temp;
228 <  short int have_target_pressure, have_qmass;
228 >  short int have_target_pressure;
229  
230 +  double *oldPos;
231 +  double *oldVel;
232 +  double *oldJi;
233 +
234 +  double chiTolerance;
235 +  short int have_chi_tolerance;
236 +  double posIterTolerance;
237 +  short int have_pos_iter_tolerance;
238 +  double etaTolerance;
239 +  short int have_eta_tolerance;
240 +
241   };
242  
243 + template<typename T> class NPTi : public T{
244 +
245 + public:
246 +  NPTi( SimInfo *theInfo, ForceFields* the_ff);
247 +  ~NPTi();
248 +
249 +  virtual double getConservedQuantity(void);
250 +  virtual void resetIntegrator(void);
251 +  virtual string getAdditionalParameters(void);
252 + protected:
253 +
254 +
255 +
256 +  virtual void evolveEtaA(void);
257 +  virtual void evolveEtaB(void);
258 +
259 +  virtual bool etaConverged( void );
260 +
261 +  virtual void scaleSimBox( void );
262 +
263 +  virtual void getVelScaleA( double sc[3], double vel[3] );
264 +  virtual void getVelScaleB( double sc[3], int index );
265 +  virtual void getPosScale(double pos[3], double COM[3],
266 +                           int index, double sc[3]);
267 +
268 +  virtual void calcVelScale( void );
269 +
270 +  double eta, oldEta, prevEta;
271 +  double vScale;
272 + };
273 +
274 + template<typename T> class NPTf : public T{
275 +
276 + public:
277 +
278 +  NPTf ( SimInfo *theInfo, ForceFields* the_ff);
279 +  virtual ~NPTf();
280 +
281 +  virtual double getConservedQuantity(void);
282 +  virtual string getAdditionalParameters(void);
283 +  virtual void resetIntegrator(void);
284 +
285 + protected:
286 +
287 +  virtual void evolveEtaA(void);
288 +  virtual void evolveEtaB(void);
289 +
290 +  virtual bool etaConverged( void );
291 +
292 +  virtual void scaleSimBox( void );
293 +
294 +  virtual void getVelScaleA( double sc[3], double vel[3] );
295 +  virtual void getVelScaleB( double sc[3], int index );
296 +  virtual void getPosScale(double pos[3], double COM[3],
297 +                           int index, double sc[3]);
298 +
299 +  virtual void calcVelScale( void );
300 +
301 +  double eta[3][3];
302 +  double oldEta[3][3];
303 +  double prevEta[3][3];
304 +  double vScale[3][3];
305 + };
306 +
307 + template<typename T> class NPTxyz : public T{
308 +
309 + public:
310 +
311 +  NPTxyz ( SimInfo *theInfo, ForceFields* the_ff);
312 +  virtual ~NPTxyz();
313 +
314 +  virtual double getConservedQuantity(void);
315 +  virtual string getAdditionalParameters(void);
316 +  virtual void resetIntegrator(void);
317 +
318 + protected:
319 +
320 +  virtual void evolveEtaA(void);
321 +  virtual void evolveEtaB(void);
322 +
323 +  virtual bool etaConverged( void );
324 +
325 +  virtual void scaleSimBox( void );
326 +
327 +  virtual void getVelScaleA( double sc[3], double vel[3] );
328 +  virtual void getVelScaleB( double sc[3], int index );
329 +  virtual void getPosScale(double pos[3], double COM[3],
330 +                           int index, double sc[3]);
331 +
332 +  virtual void calcVelScale( void );
333 +
334 +  double eta[3][3];
335 +  double oldEta[3][3];
336 +  double prevEta[3][3];
337 +  double vScale[3][3];
338 + };
339 +
340 +
341 + template<typename T> class ZConstraint : public T {
342 +
343 +  public:
344 +  class ForceSubtractionPolicy{
345 +    public:
346 +      ForceSubtractionPolicy(ZConstraint<T>* integrator) {zconsIntegrator = integrator;}
347 +
348 +      virtual void update() = 0;
349 +      virtual double getZFOfFixedZMols(Molecule* mol, Atom* atom, double totalForce) = 0;
350 +      virtual double getZFOfMovingMols(Atom* atom, double totalForce) = 0;
351 +      virtual double getHFOfFixedZMols(Molecule* mol, Atom* atom, double totalForce) = 0;
352 +      virtual double getHFOfUnconsMols(Atom* atom, double totalForce) = 0;
353 +
354 +   protected:
355 +     ZConstraint<T>* zconsIntegrator;
356 +  };
357 +
358 +  class PolicyByNumber : public ForceSubtractionPolicy{
359 +
360 +    public:
361 +      PolicyByNumber(ZConstraint<T>* integrator) :ForceSubtractionPolicy(integrator) {}
362 +      virtual void update();
363 +      virtual double getZFOfFixedZMols(Molecule* mol, Atom* atom, double totalForce) ;
364 +      virtual double getZFOfMovingMols(Atom* atom, double totalForce) ;
365 +      virtual double getHFOfFixedZMols(Molecule* mol, Atom* atom, double totalForce);
366 +      virtual double getHFOfUnconsMols(Atom* atom, double totalForce);
367 +
368 +    private:
369 +      int totNumOfMovingAtoms;
370 +  };
371 +
372 +  class PolicyByMass : public ForceSubtractionPolicy{
373 +
374 +    public:
375 +      PolicyByMass(ZConstraint<T>* integrator) :ForceSubtractionPolicy(integrator) {}
376 +
377 +      virtual void update();
378 +      virtual double getZFOfFixedZMols(Molecule* mol, Atom* atom, double totalForce) ;
379 +      virtual double getZFOfMovingMols(Atom* atom, double totalForce) ;
380 +      virtual double getHFOfFixedZMols(Molecule* mol, Atom* atom, double totalForce);
381 +      virtual double getHFOfUnconsMols(Atom* atom, double totalForce);
382 +
383 +   private:
384 +     double totMassOfMovingAtoms;
385 +  };
386 +
387 + public:
388 +
389 +  ZConstraint( SimInfo *theInfo, ForceFields* the_ff);
390 +  ~ZConstraint();
391 +
392 +  void setZConsTime(double time)                  {this->zconsTime = time;}
393 +  void getZConsTime()                             {return zconsTime;}
394 +
395 +  void setIndexOfAllZConsMols(vector<int> index) {indexOfAllZConsMols = index;}
396 +  void getIndexOfAllZConsMols()                  {return indexOfAllZConsMols;}
397 +
398 +  void setZConsOutput(const char * fileName)          {zconsOutput = fileName;}
399 +  string getZConsOutput()                         {return zconsOutput;}
400 +
401 +  virtual void integrate();
402 +
403 +
404 + #ifdef IS_MPI
405 +  virtual void update();                      //which is called to indicate the molecules' migration
406   #endif
407 +
408 +  enum ZConsState {zcsMoving, zcsFixed};
409 +
410 +  vector<Molecule*> zconsMols;              //z-constraint molecules array
411 +  vector<ZConsState> states;                 //state of z-constraint molecules
412 +
413 +
414 +
415 +  int totNumOfUnconsAtoms;              //total number of uncontraint atoms
416 +  double totalMassOfUncons;                //total mas of unconstraint molecules
417 +
418 +
419 + protected:
420 +
421 +
422 +
423 +  virtual void calcForce( int calcPot, int calcStress );
424 +  virtual void thermalize(void);
425 +
426 +  void zeroOutVel();
427 +  void doZconstraintForce();
428 +  void doHarmonic(vector<double>& resPos);
429 +  bool checkZConsState();
430 +
431 +  bool haveFixedZMols();
432 +  bool haveMovingZMols();
433 +
434 +  double calcZSys();
435 +
436 +  int isZConstraintMol(Molecule* mol);
437 +
438 +
439 +  double zconsTime;                              //sample time
440 +  double zconsTol;                                 //tolerance of z-contratint
441 +  double zForceConst;                           //base force constant term
442 +                                                          //which is estimate by OOPSE
443 +
444 +
445 +  vector<double> massOfZConsMols;       //mass of z-constraint molecule
446 +  vector<double> kz;                              //force constant array
447 +
448 +  vector<double> zPos;                          //
449 +
450 +
451 +  vector<Molecule*> unconsMols;           //unconstraint molecules array
452 +  vector<double> massOfUnconsMols;    //mass array of unconstraint molecules
453 +
454 +
455 +  vector<ZConsParaItem>* parameters; //
456 +
457 +  vector<int> indexOfAllZConsMols;     //index of All Z-Constraint Molecuels
458 +
459 +  vector<int> indexOfZConsMols;                   //index of local Z-Constraint Molecules
460 +  vector<double> fz;
461 +  vector<double> curZPos;
462 +
463 +  bool usingSMD;
464 +  vector<double> prevCantPos;
465 +  vector<double> cantPos;
466 +  vector<double> cantVel;
467 +
468 +  double zconsFixTime;  
469 +  double zconsGap;
470 +  bool hasZConsGap;
471 +  vector<double> endFixTime;
472 +  
473 +  int whichDirection;                           //constraint direction
474 +
475 + private:
476 +
477 +  string zconsOutput;                         //filename of zconstraint output
478 +  ZConsWriter* fzOut;                         //z-constraint writer
479 +
480 +  double curZconsTime;
481 +
482 +  double calcMovingMolsCOMVel();
483 +  double calcSysCOMVel();
484 +  double calcTotalForce();
485 +  void updateZPos();
486 +  void updateCantPos();
487 +  
488 +  ForceSubtractionPolicy* forcePolicy; //force subtraction policy
489 +  friend class ForceSubtractionPolicy;
490 +
491 + };
492 +
493 + #endif

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