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root/group/trunk/OOPSE/libmdtools/SimInfo.cpp
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Comparing trunk/OOPSE/libmdtools/SimInfo.cpp (file contents):
Revision 490 by gezelter, Fri Apr 11 15:16:59 2003 UTC vs.
Revision 572 by mmeineke, Wed Jul 2 21:26:55 2003 UTC

# Line 1 | Line 1
1   #include <cstdlib>
2   #include <cstring>
3 + #include <cmath>
4  
5 + #include <iostream>
6 + using namespace std;
7  
8   #include "SimInfo.hpp"
9   #define __C
# Line 13 | Line 16 | SimInfo* currentInfo;
16   #include "mpiSimulation.hpp"
17   #endif
18  
19 + inline double roundMe( double x ){
20 +  return ( x >= 0 ) ? floor( x + 0.5 ) : ceil( x - 0.5 );
21 + }
22 +          
23 +
24   SimInfo* currentInfo;
25  
26   SimInfo::SimInfo(){
# Line 39 | Line 47 | void SimInfo::setBox(double newBox[3]) {
47   }
48  
49   void SimInfo::setBox(double newBox[3]) {
50 <  double smallestBox, maxCutoff;
50 >
51 >  double smallestBoxL, maxCutoff;
52    int status;
53 <  box_x = newBox[0];
45 <  box_y = newBox[1];
46 <  box_z = newBox[2];
47 <  setFortranBoxSize(newBox);
53 >  int i;
54  
55 <  smallestBox = box_x;
50 <  if (box_y < smallestBox) smallestBox = box_y;
51 <  if (box_z < smallestBox) smallestBox = box_z;
55 >  for(i=0; i<9; i++) Hmat[i] = 0.0;;
56  
57 <  maxCutoff = smallestBox / 2.0;
57 >  Hmat[0] = newBox[0];
58 >  Hmat[4] = newBox[1];
59 >  Hmat[8] = newBox[2];
60  
61 +  calcHmatI();
62 +  calcBoxL();
63 +
64 +  setFortranBoxSize(Hmat, HmatI, &orthoRhombic);
65 +
66 +  smallestBoxL = boxLx;
67 +  if (boxLy < smallestBoxL) smallestBoxL = boxLy;
68 +  if (boxLz < smallestBoxL) smallestBoxL = boxLz;
69 +
70 +  maxCutoff = smallestBoxL / 2.0;
71 +
72    if (rList > maxCutoff) {
73      sprintf( painCave.errMsg,
74               "New Box size is forcing neighborlist radius down to %lf\n",
# Line 91 | Line 108 | void SimInfo::getBox(double theBox[3]) {
108    }
109   }
110  
111 < void SimInfo::getBox(double theBox[3]) {
112 <  theBox[0] = box_x;
113 <  theBox[1] = box_y;
114 <  theBox[2] = box_z;
111 > void SimInfo::setBoxM( double theBox[9] ){
112 >  
113 >  int i, status;
114 >  double smallestBoxL, maxCutoff;
115 >
116 >  for(i=0; i<9; i++) Hmat[i] = theBox[i];
117 >  calcHmatI();
118 >  calcBoxL();
119 >
120 >  setFortranBoxSize(Hmat, HmatI, &orthoRhombic);
121 >
122 >  smallestBoxL = boxLx;
123 >  if (boxLy < smallestBoxL) smallestBoxL = boxLy;
124 >  if (boxLz < smallestBoxL) smallestBoxL = boxLz;
125 >
126 >  maxCutoff = smallestBoxL / 2.0;
127 >
128 >  if (rList > maxCutoff) {
129 >    sprintf( painCave.errMsg,
130 >             "New Box size is forcing neighborlist radius down to %lf\n",
131 >             maxCutoff );
132 >    painCave.isFatal = 0;
133 >    simError();
134 >
135 >    rList = maxCutoff;
136 >
137 >    sprintf( painCave.errMsg,
138 >             "New Box size is forcing cutoff radius down to %lf\n",
139 >             maxCutoff - 1.0 );
140 >    painCave.isFatal = 0;
141 >    simError();
142 >
143 >    rCut = rList - 1.0;
144 >
145 >    // list radius changed so we have to refresh the simulation structure.
146 >    refreshSim();
147 >  }
148 >
149 >  if (rCut > maxCutoff) {
150 >    sprintf( painCave.errMsg,
151 >             "New Box size is forcing cutoff radius down to %lf\n",
152 >             maxCutoff );
153 >    painCave.isFatal = 0;
154 >    simError();
155 >
156 >    status = 0;
157 >    LJ_new_rcut(&rCut, &status);
158 >    if (status != 0) {
159 >      sprintf( painCave.errMsg,
160 >               "Error in recomputing LJ shifts based on new rcut\n");
161 >      painCave.isFatal = 1;
162 >      simError();
163 >    }
164 >  }
165   }
166  
167 +
168 + void SimInfo::getBoxM (double theBox[9]) {
169 +
170 +  int i;
171 +  for(i=0; i<9; i++) theBox[i] = Hmat[i];
172 + }
173 +
174 +
175 + void SimInfo::calcHmatI( void ) {
176 +
177 +  double C[3][3];
178 +  double detHmat;
179 +  int i, j, k;
180 +  double smallDiag;
181 +  double tol;
182 +  double sanity[3][3];
183 +
184 +  // calculate the adjunct of Hmat;
185 +
186 +  C[0][0] =  ( Hmat[4]*Hmat[8]) - (Hmat[7]*Hmat[5]);
187 +  C[1][0] = -( Hmat[1]*Hmat[8]) + (Hmat[7]*Hmat[2]);
188 +  C[2][0] =  ( Hmat[1]*Hmat[5]) - (Hmat[4]*Hmat[2]);
189 +
190 +  C[0][1] = -( Hmat[3]*Hmat[8]) + (Hmat[6]*Hmat[5]);
191 +  C[1][1] =  ( Hmat[0]*Hmat[8]) - (Hmat[6]*Hmat[2]);
192 +  C[2][1] = -( Hmat[0]*Hmat[5]) + (Hmat[3]*Hmat[2]);
193 +
194 +  C[0][2] =  ( Hmat[3]*Hmat[7]) - (Hmat[6]*Hmat[4]);
195 +  C[1][2] = -( Hmat[0]*Hmat[7]) + (Hmat[6]*Hmat[1]);
196 +  C[2][2] =  ( Hmat[0]*Hmat[4]) - (Hmat[3]*Hmat[1]);
197 +
198 +  // calcutlate the determinant of Hmat
199 +  
200 +  detHmat = 0.0;
201 +  for(i=0; i<3; i++) detHmat += Hmat[i] * C[i][0];
202 +
203 +  
204 +  // H^-1 = C^T / det(H)
205 +  
206 +  i=0;
207 +  for(j=0; j<3; j++){
208 +    for(k=0; k<3; k++){
209 +
210 +      HmatI[i] = C[j][k] / detHmat;
211 +      i++;
212 +    }
213 +  }
214 +
215 +  // sanity check
216 +
217 +  for(i=0; i<3; i++){
218 +    for(j=0; j<3; j++){
219 +      
220 +      sanity[i][j] = 0.0;
221 +      for(k=0; k<3; k++){
222 +        sanity[i][j] += Hmat[3*k+i] * HmatI[3*j+k];
223 +      }
224 +    }
225 +  }
226 +
227 +  cerr << "sanity => \n"
228 +       << sanity[0][0] << "\t" << sanity[0][1] << "\t" << sanity [0][2] << "\n"
229 +       << sanity[1][0] << "\t" << sanity[1][1] << "\t" << sanity [1][2] << "\n"
230 +       << sanity[2][0] << "\t" << sanity[2][1] << "\t" << sanity [2][2]
231 +       << "\n";
232 +    
233 +
234 +  // check to see if Hmat is orthorhombic
235 +  
236 +  smallDiag = Hmat[0];
237 +  if(smallDiag > Hmat[4]) smallDiag = Hmat[4];
238 +  if(smallDiag > Hmat[8]) smallDiag = Hmat[8];
239 +  tol = smallDiag * 1E-6;
240 +
241 +  orthoRhombic = 1;
242 +  for(i=0; (i<9) && orthoRhombic; i++){
243 +    
244 +    if( (i%4) ){ // ignore the diagonals (0, 4, and 8)
245 +      orthoRhombic = (Hmat[i] <= tol);
246 +    }
247 +  }
248 +    
249 + }
250 +
251 + void SimInfo::calcBoxL( void ){
252 +
253 +  double dx, dy, dz, dsq;
254 +  int i;
255 +
256 +  // boxVol = h1 (dot) h2 (cross) h3
257 +
258 +  boxVol = Hmat[0] * ( (Hmat[4]*Hmat[8]) - (Hmat[7]*Hmat[5]) )
259 +         + Hmat[1] * ( (Hmat[5]*Hmat[6]) - (Hmat[8]*Hmat[3]) )
260 +         + Hmat[2] * ( (Hmat[3]*Hmat[7]) - (Hmat[6]*Hmat[4]) );
261 +
262 +
263 +  // boxLx
264 +  
265 +  dx = Hmat[0]; dy = Hmat[1]; dz = Hmat[2];
266 +  dsq = dx*dx + dy*dy + dz*dz;
267 +  boxLx = sqrt( dsq );
268 +
269 +  // boxLy
270 +  
271 +  dx = Hmat[3]; dy = Hmat[4]; dz = Hmat[5];
272 +  dsq = dx*dx + dy*dy + dz*dz;
273 +  boxLy = sqrt( dsq );
274 +
275 +  // boxLz
276 +  
277 +  dx = Hmat[6]; dy = Hmat[7]; dz = Hmat[8];
278 +  dsq = dx*dx + dy*dy + dz*dz;
279 +  boxLz = sqrt( dsq );
280 +  
281 + }
282 +
283 +
284 + void SimInfo::wrapVector( double thePos[3] ){
285 +
286 +  int i, j, k;
287 +  double scaled[3];
288 +
289 +  if( !orthoRhombic ){
290 +    // calc the scaled coordinates.
291 +    
292 +    for(i=0; i<3; i++)
293 +      scaled[i] =
294 +        thePos[0]*HmatI[i] + thePos[1]*HmatI[i+3] + thePos[3]*HmatI[i+6];
295 +    
296 +    // wrap the scaled coordinates
297 +    
298 +    for(i=0; i<3; i++)
299 +      scaled[i] -= roundMe(scaled[i]);
300 +    
301 +    // calc the wrapped real coordinates from the wrapped scaled coordinates
302 +    
303 +    for(i=0; i<3; i++)
304 +      thePos[i] =
305 +        scaled[0]*Hmat[i] + scaled[1]*Hmat[i+3] + scaled[2]*Hmat[i+6];
306 +  }
307 +  else{
308 +    // calc the scaled coordinates.
309 +    
310 +    for(i=0; i<3; i++)
311 +      scaled[i] = thePos[i]*HmatI[i*4];
312 +    
313 +    // wrap the scaled coordinates
314 +    
315 +    for(i=0; i<3; i++)
316 +      scaled[i] -= roundMe(scaled[i]);
317 +    
318 +    // calc the wrapped real coordinates from the wrapped scaled coordinates
319 +    
320 +    for(i=0; i<3; i++)
321 +      thePos[i] = scaled[i]*Hmat[i*4];
322 +  }
323 +    
324 +    
325 + }
326 +
327 +
328   int SimInfo::getNDF(){
329    int ndf_local, ndf;
330    
# Line 139 | Line 367 | void SimInfo::refreshSim(){
367    fInfo.rt = 0.0;
368    fInfo.dielect = 0.0;
369  
142 –  fInfo.box[0] = box_x;
143 –  fInfo.box[1] = box_y;
144 –  fInfo.box[2] = box_z;
145 –
370    fInfo.rlist = rList;
371    fInfo.rcut = rCut;
372  

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