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root/OpenMD/branches/development/src/brains/SimInfo.cpp
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Comparing branches/development/src/brains/SimInfo.cpp (file contents):
Revision 1760 by gezelter, Thu Jun 21 19:26:46 2012 UTC vs.
Revision 1764 by gezelter, Tue Jul 3 18:32:27 2012 UTC

# Line 988 | Line 988 | namespace OpenMD {
988      }    
989      
990    }
991 –
992 –  Vector3d SimInfo::getComVel(){
993 –    SimInfo::MoleculeIterator i;
994 –    Molecule* mol;
995 –
996 –    Vector3d comVel(0.0);
997 –    RealType totalMass = 0.0;
998 –    
999 –
1000 –    for (mol = beginMolecule(i); mol != NULL; mol = nextMolecule(i)) {
1001 –      RealType mass = mol->getMass();
1002 –      totalMass += mass;
1003 –      comVel += mass * mol->getComVel();
1004 –    }  
1005 –
1006 – #ifdef IS_MPI
1007 –    RealType tmpMass = totalMass;
1008 –    Vector3d tmpComVel(comVel);    
1009 –    MPI_Allreduce(&tmpMass,&totalMass,1,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1010 –    MPI_Allreduce(tmpComVel.getArrayPointer(), comVel.getArrayPointer(),3,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1011 – #endif
991  
1013 –    comVel /= totalMass;
992  
1015 –    return comVel;
1016 –  }
1017 –
1018 –  Vector3d SimInfo::getCom(){
1019 –    SimInfo::MoleculeIterator i;
1020 –    Molecule* mol;
1021 –
1022 –    Vector3d com(0.0);
1023 –    RealType totalMass = 0.0;
1024 –    
1025 –    for (mol = beginMolecule(i); mol != NULL; mol = nextMolecule(i)) {
1026 –      RealType mass = mol->getMass();
1027 –      totalMass += mass;
1028 –      com += mass * mol->getCom();
1029 –    }  
1030 –
1031 – #ifdef IS_MPI
1032 –    RealType tmpMass = totalMass;
1033 –    Vector3d tmpCom(com);    
1034 –    MPI_Allreduce(&tmpMass,&totalMass,1,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1035 –    MPI_Allreduce(tmpCom.getArrayPointer(), com.getArrayPointer(),3,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1036 – #endif
1037 –
1038 –    com /= totalMass;
1039 –
1040 –    return com;
1041 –
1042 –  }        
1043 –
993    ostream& operator <<(ostream& o, SimInfo& info) {
994  
995      return o;
996    }
997    
998 <  
1050 <   /*
1051 <   Returns center of mass and center of mass velocity in one function call.
1052 <   */
1053 <  
1054 <   void SimInfo::getComAll(Vector3d &com, Vector3d &comVel){
1055 <      SimInfo::MoleculeIterator i;
1056 <      Molecule* mol;
1057 <      
1058 <    
1059 <      RealType totalMass = 0.0;
1060 <    
1061 <
1062 <      for (mol = beginMolecule(i); mol != NULL; mol = nextMolecule(i)) {
1063 <         RealType mass = mol->getMass();
1064 <         totalMass += mass;
1065 <         com += mass * mol->getCom();
1066 <         comVel += mass * mol->getComVel();          
1067 <      }  
1068 <      
1069 < #ifdef IS_MPI
1070 <      RealType tmpMass = totalMass;
1071 <      Vector3d tmpCom(com);  
1072 <      Vector3d tmpComVel(comVel);
1073 <      MPI_Allreduce(&tmpMass,&totalMass,1,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1074 <      MPI_Allreduce(tmpCom.getArrayPointer(), com.getArrayPointer(),3,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1075 <      MPI_Allreduce(tmpComVel.getArrayPointer(), comVel.getArrayPointer(),3,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1076 < #endif
1077 <      
1078 <      com /= totalMass;
1079 <      comVel /= totalMass;
1080 <   }        
1081 <  
1082 <   /*
1083 <   Return intertia tensor for entire system and angular momentum Vector.
1084 <
1085 <
1086 <       [  Ixx -Ixy  -Ixz ]
1087 <    J =| -Iyx  Iyy  -Iyz |
1088 <       [ -Izx -Iyz   Izz ]
1089 <    */
1090 <
1091 <   void SimInfo::getInertiaTensor(Mat3x3d &inertiaTensor, Vector3d &angularMomentum){
1092 <      
1093 <
1094 <      RealType xx = 0.0;
1095 <      RealType yy = 0.0;
1096 <      RealType zz = 0.0;
1097 <      RealType xy = 0.0;
1098 <      RealType xz = 0.0;
1099 <      RealType yz = 0.0;
1100 <      Vector3d com(0.0);
1101 <      Vector3d comVel(0.0);
1102 <      
1103 <      getComAll(com, comVel);
1104 <      
1105 <      SimInfo::MoleculeIterator i;
1106 <      Molecule* mol;
1107 <      
1108 <      Vector3d thisq(0.0);
1109 <      Vector3d thisv(0.0);
1110 <
1111 <      RealType thisMass = 0.0;
1112 <    
1113 <      
1114 <      
1115 <  
1116 <      for (mol = beginMolecule(i); mol != NULL; mol = nextMolecule(i)) {
1117 <        
1118 <         thisq = mol->getCom()-com;
1119 <         thisv = mol->getComVel()-comVel;
1120 <         thisMass = mol->getMass();
1121 <         // Compute moment of intertia coefficients.
1122 <         xx += thisq[0]*thisq[0]*thisMass;
1123 <         yy += thisq[1]*thisq[1]*thisMass;
1124 <         zz += thisq[2]*thisq[2]*thisMass;
1125 <        
1126 <         // compute products of intertia
1127 <         xy += thisq[0]*thisq[1]*thisMass;
1128 <         xz += thisq[0]*thisq[2]*thisMass;
1129 <         yz += thisq[1]*thisq[2]*thisMass;
1130 <            
1131 <         angularMomentum += cross( thisq, thisv ) * thisMass;
1132 <            
1133 <      }  
1134 <      
1135 <      
1136 <      inertiaTensor(0,0) = yy + zz;
1137 <      inertiaTensor(0,1) = -xy;
1138 <      inertiaTensor(0,2) = -xz;
1139 <      inertiaTensor(1,0) = -xy;
1140 <      inertiaTensor(1,1) = xx + zz;
1141 <      inertiaTensor(1,2) = -yz;
1142 <      inertiaTensor(2,0) = -xz;
1143 <      inertiaTensor(2,1) = -yz;
1144 <      inertiaTensor(2,2) = xx + yy;
1145 <      
1146 < #ifdef IS_MPI
1147 <      Mat3x3d tmpI(inertiaTensor);
1148 <      Vector3d tmpAngMom;
1149 <      MPI_Allreduce(tmpI.getArrayPointer(), inertiaTensor.getArrayPointer(),9,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1150 <      MPI_Allreduce(tmpAngMom.getArrayPointer(), angularMomentum.getArrayPointer(),3,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1151 < #endif
1152 <              
1153 <      return;
1154 <   }
1155 <
1156 <   //Returns the angular momentum of the system
1157 <   Vector3d SimInfo::getAngularMomentum(){
1158 <      
1159 <      Vector3d com(0.0);
1160 <      Vector3d comVel(0.0);
1161 <      Vector3d angularMomentum(0.0);
1162 <      
1163 <      getComAll(com,comVel);
1164 <      
1165 <      SimInfo::MoleculeIterator i;
1166 <      Molecule* mol;
1167 <      
1168 <      Vector3d thisr(0.0);
1169 <      Vector3d thisp(0.0);
1170 <      
1171 <      RealType thisMass;
1172 <      
1173 <      for (mol = beginMolecule(i); mol != NULL; mol = nextMolecule(i)) {        
1174 <        thisMass = mol->getMass();
1175 <        thisr = mol->getCom()-com;
1176 <        thisp = (mol->getComVel()-comVel)*thisMass;
1177 <        
1178 <        angularMomentum += cross( thisr, thisp );
1179 <        
1180 <      }  
1181 <      
1182 < #ifdef IS_MPI
1183 <      Vector3d tmpAngMom;
1184 <      MPI_Allreduce(tmpAngMom.getArrayPointer(), angularMomentum.getArrayPointer(),3,MPI_REALTYPE,MPI_SUM, MPI_COMM_WORLD);
1185 < #endif
1186 <      
1187 <      return angularMomentum;
1188 <   }
1189 <  
998 >  
999    StuntDouble* SimInfo::getIOIndexToIntegrableObject(int index) {
1000      return IOIndexToIntegrableObject.at(index);
1001    }
# Line 1194 | Line 1003 | namespace OpenMD {
1003    void SimInfo::setIOIndexToIntegrableObject(const vector<StuntDouble*>& v) {
1004      IOIndexToIntegrableObject= v;
1005    }
1197 –
1198 –  /* Returns the Volume of the simulation based on a ellipsoid with semi-axes
1199 –     based on the radius of gyration V=4/3*Pi*R_1*R_2*R_3
1200 –     where R_i are related to the principle inertia moments R_i = sqrt(C*I_i/N), this reduces to
1201 –     V = 4/3*Pi*(C/N)^3/2*sqrt(det(I)). See S.E. Baltazar et. al. Comp. Mat. Sci. 37 (2006) 526-536.
1202 –  */
1203 –  void SimInfo::getGyrationalVolume(RealType &volume){
1204 –    Mat3x3d intTensor;
1205 –    RealType det;
1206 –    Vector3d dummyAngMom;
1207 –    RealType sysconstants;
1208 –    RealType geomCnst;
1209 –
1210 –    geomCnst = 3.0/2.0;
1211 –    /* Get the inertial tensor and angular momentum for free*/
1212 –    getInertiaTensor(intTensor,dummyAngMom);
1213 –    
1214 –    det = intTensor.determinant();
1215 –    sysconstants = geomCnst/(RealType)nGlobalIntegrableObjects_;
1216 –    volume = 4.0/3.0*NumericConstant::PI*pow(sysconstants,geomCnst)*sqrt(det);
1217 –    return;
1218 –  }
1219 –
1220 –  void SimInfo::getGyrationalVolume(RealType &volume, RealType &detI){
1221 –    Mat3x3d intTensor;
1222 –    Vector3d dummyAngMom;
1223 –    RealType sysconstants;
1224 –    RealType geomCnst;
1225 –
1226 –    geomCnst = 3.0/2.0;
1227 –    /* Get the inertial tensor and angular momentum for free*/
1228 –    getInertiaTensor(intTensor,dummyAngMom);
1229 –    
1230 –    detI = intTensor.determinant();
1231 –    sysconstants = geomCnst/(RealType)nGlobalIntegrableObjects_;
1232 –    volume = 4.0/3.0*NumericConstant::PI*pow(sysconstants,geomCnst)*sqrt(detI);
1233 –    return;
1234 –  }
1006   /*
1007     void SimInfo::setStuntDoubleFromGlobalIndex(vector<StuntDouble*> v) {
1008        assert( v.size() == nAtoms_ + nRigidBodies_);

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