--- trunk/OOPSE/libmdtools/Integrator.hpp	2003/08/20 14:34:04	701
+++ trunk/OOPSE/libmdtools/Integrator.hpp	2003/08/25 21:51:30	718
@@ -297,7 +297,52 @@ template<typename T> class NPTfm : public T{ (protecte
   short int have_target_pressure;
 
 };
+
+
+template<typename T> class NPTpr : public T{
+
+public:
+
+  NPTpr ( SimInfo *theInfo, ForceFields* the_ff);
+  virtual ~NPTpr() {};
+
+  virtual void integrateStep( int calcPot, int calcStress ){
+    calcStress = 1;
+    T::integrateStep( calcPot, calcStress );
+  }
 
+  void setTauThermostat(double tt) {tauThermostat = tt; have_tau_thermostat=1;}
+  void setTauBarostat(double tb) {tauBarostat = tb; have_tau_barostat=1;}
+  void setTargetTemp(double tt) {targetTemp = tt; have_target_temp = 1;}
+  void setTargetPressure(double tp) {targetPressure = tp; have_target_pressure = 1;}
+
+protected:
+
+  virtual void  moveA( void );
+  virtual void moveB( void );
+
+  virtual int readyCheck();
+
+  // chi and eta are the propagated degrees of freedom
+
+  double chi;
+  double eta[3][3];
+  double NkBT;
+
+  // targetTemp, targetPressure, and tauBarostat must be set.  
+  // One of qmass or tauThermostat must be set;
+
+  double targetTemp;
+  double targetPressure;
+  double tauThermostat;
+  double tauBarostat;
+
+  short int have_tau_thermostat, have_tau_barostat, have_target_temp;
+  short int have_target_pressure;
+
+};
+
+
 template<typename T> class ZConstraint : public T {
   
   public: