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root/group/trunk/OOPSE/libmdtools/Thermo.cpp
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Comparing trunk/OOPSE/libmdtools/Thermo.cpp (file contents):
Revision 486 by mmeineke, Thu Apr 10 16:22:00 2003 UTC vs.
Revision 574 by gezelter, Tue Jul 8 20:56:10 2003 UTC

# Line 151 | Line 151 | double Thermo::getVolume() {
151   }
152  
153   double Thermo::getVolume() {
154  double theBox[3];
154  
155 <  entry_plug->getBox(theBox);
156 <  return (theBox[0] * theBox[1] * theBox[2]);
155 >  double volume;
156 >  double Hmat[9];
157 >
158 >  entry_plug->getBoxM(Hmat);
159 >
160 >  // volume = h1 (dot) h2 (cross) h3
161 >
162 >  volume = Hmat[0] * ( (Hmat[4]*Hmat[8]) - (Hmat[7]*Hmat[5]) )
163 >         + Hmat[1] * ( (Hmat[5]*Hmat[6]) - (Hmat[8]*Hmat[3]) )
164 >         + Hmat[2] * ( (Hmat[3]*Hmat[7]) - (Hmat[6]*Hmat[4]) );
165 >
166 >  return volume;
167   }
168  
169   double Thermo::getPressure() {
170 <  // returns the pressure in units of atm
170 >
171    // Relies on the calculation of the full molecular pressure tensor
172    
173    const double p_convert = 1.63882576e8;
# Line 222 | Line 231 | void Thermo::getPressureTensor(double press[9]){
231    }
232   #endif // is_mpi
233  
234 <  entry_plug->getBox(theBox);
234 >  volume = entry_plug->boxVol;
235  
227  volume = theBox[0] * theBox[1] * theBox[2];
228
236    for(i=0; i<9; i++) {
237      press[i] = (p_global[i] - entry_plug->tau[i]*e_convert) / volume;
238    }

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