--- trunk/OOPSE/libmdtools/Integrator.cpp	2004/01/30 15:01:09	999
+++ trunk/OOPSE/libmdtools/Integrator.cpp	2004/04/19 03:52:27	1118
@@ -31,6 +31,7 @@ template<typename T> Integrator<T>::Integrator(SimInfo
   }
 
   nAtoms = info->n_atoms;
+  integrableObjects = info->integrableObjects;
 
   // check for constraints
 
@@ -68,7 +69,8 @@ template<typename T> void Integrator<T>::checkConstrai
 
   SRI** theArray;
   for (int i = 0; i < nMols; i++){
-    theArray = (SRI * *) molecules[i].getMyBonds();
+
+	  theArray = (SRI * *) molecules[i].getMyBonds();
     for (int j = 0; j < molecules[i].getNBonds(); j++){
       constrained = theArray[j]->is_constrained();
 
@@ -114,6 +116,7 @@ template<typename T> void Integrator<T>::checkConstrai
     }
   }
 
+
   if (nConstrained > 0){
     isConstrained = 1;
 
@@ -179,7 +182,7 @@ template<typename T> void Integrator<T>::integrate(voi
   // initialize the forces before the first step
 
   calcForce(1, 1);
-
+  
   if (nConstrained){
     preMove();
     constrainA();
@@ -207,7 +210,7 @@ template<typename T> void Integrator<T>::integrate(voi
   MPIcheckPoint();
 #endif // is_mpi
 
-  while (info->getTime() < runTime){
+  while (info->getTime() < runTime && !stopIntegrator()){
     if ((info->getTime() + dt) >= currStatus){
       calcPot = 1;
       calcStress = 1;
@@ -329,18 +332,18 @@ template<typename T> void Integrator<T>::moveA(void){
 
 
 template<typename T> void Integrator<T>::moveA(void){
-  int i, j;
+  size_t i, j;
   DirectionalAtom* dAtom;
   double Tb[3], ji[3];
   double vel[3], pos[3], frc[3];
   double mass;
-
-  for (i = 0; i < nAtoms; i++){
-    atoms[i]->getVel(vel);
-    atoms[i]->getPos(pos);
-    atoms[i]->getFrc(frc);
-
-    mass = atoms[i]->getMass();
+ 
+  for (i = 0; i < integrableObjects.size() ; i++){
+    integrableObjects[i]->getVel(vel);
+    integrableObjects[i]->getPos(pos);
+    integrableObjects[i]->getFrc(frc);
+    
+    mass = integrableObjects[i]->getMass();
 
     for (j = 0; j < 3; j++){
       // velocity half step
@@ -349,27 +352,26 @@ template<typename T> void Integrator<T>::moveA(void){
       pos[j] += dt * vel[j];
     }
 
-    atoms[i]->setVel(vel);
-    atoms[i]->setPos(pos);
+    integrableObjects[i]->setVel(vel);
+    integrableObjects[i]->setPos(pos);
 
-    if (atoms[i]->isDirectional()){
-      dAtom = (DirectionalAtom *) atoms[i];
+    if (integrableObjects[i]->isDirectional()){
 
       // get and convert the torque to body frame
 
-      dAtom->getTrq(Tb);
-      dAtom->lab2Body(Tb);
+      integrableObjects[i]->getTrq(Tb);
+      integrableObjects[i]->lab2Body(Tb);
 
       // get the angular momentum, and propagate a half step
 
-      dAtom->getJ(ji);
+      integrableObjects[i]->getJ(ji);
 
       for (j = 0; j < 3; j++)
         ji[j] += (dt2 * Tb[j]) * eConvert;
 
-      this->rotationPropagation( dAtom, ji );
+      this->rotationPropagation( integrableObjects[i], ji );
 
-      dAtom->setJ(ji);
+      integrableObjects[i]->setJ(ji);
     }
   }
 
@@ -381,40 +383,38 @@ template<typename T> void Integrator<T>::moveB(void){
 
 template<typename T> void Integrator<T>::moveB(void){
   int i, j;
-  DirectionalAtom* dAtom;
   double Tb[3], ji[3];
   double vel[3], frc[3];
   double mass;
 
-  for (i = 0; i < nAtoms; i++){
-    atoms[i]->getVel(vel);
-    atoms[i]->getFrc(frc);
+  for (i = 0; i < integrableObjects.size(); i++){
+    integrableObjects[i]->getVel(vel);
+    integrableObjects[i]->getFrc(frc);
 
-    mass = atoms[i]->getMass();
+    mass = integrableObjects[i]->getMass();
 
     // velocity half step
     for (j = 0; j < 3; j++)
       vel[j] += (dt2 * frc[j] / mass) * eConvert;
 
-    atoms[i]->setVel(vel);
+    integrableObjects[i]->setVel(vel);
 
-    if (atoms[i]->isDirectional()){
-      dAtom = (DirectionalAtom *) atoms[i];
+    if (integrableObjects[i]->isDirectional()){
 
       // get and convert the torque to body frame
 
-      dAtom->getTrq(Tb);
-      dAtom->lab2Body(Tb);
+      integrableObjects[i]->getTrq(Tb);
+      integrableObjects[i]->lab2Body(Tb);
 
       // get the angular momentum, and propagate a half step
 
-      dAtom->getJ(ji);
+      integrableObjects[i]->getJ(ji);
 
       for (j = 0; j < 3; j++)
         ji[j] += (dt2 * Tb[j]) * eConvert;
 
 
-      dAtom->setJ(ji);
+      integrableObjects[i]->setJ(ji);
     }
   }
 
@@ -683,17 +683,33 @@ template<typename T> void Integrator<T>::rotationPropa
 }
 
 template<typename T> void Integrator<T>::rotationPropagation
-( DirectionalAtom* dAtom, double ji[3] ){
+( StuntDouble* sd, double ji[3] ){
 
   double angle;
   double A[3][3], I[3][3];
+  int i, j, k;
 
   // use the angular velocities to propagate the rotation matrix a
   // full time step
 
-  dAtom->getA(A);
-  dAtom->getI(I);
+  sd->getA(A);
+  sd->getI(I);
 
+  if (sd->isLinear()) {
+    i = sd->linearAxis();
+    j = (i+1)%3;
+    k = (i+2)%3;
+    
+    angle = dt2 * ji[j] / I[j][j];
+    this->rotate( k, i, angle, ji, A );
+
+    angle = dt * ji[k] / I[k][k];
+    this->rotate( i, j, angle, ji, A);
+
+    angle = dt2 * ji[j] / I[j][j];
+    this->rotate( k, i, angle, ji, A );
+
+  } else {
   // rotate about the x-axis
   angle = dt2 * ji[0] / I[0][0];
   this->rotate( 1, 2, angle, ji, A );
@@ -714,7 +730,8 @@ template<typename T> void Integrator<T>::rotationPropa
   angle = dt2 * ji[0] / I[0][0];
   this->rotate( 1, 2, angle, ji, A );
 
-  dAtom->setA( A  );
+  }
+  sd->setA( A  );
 }
 
 template<typename T> void Integrator<T>::rotate(int axes1, int axes2,