--- trunk/OOPSE/libmdtools/ExtendedSystem.hpp	2003/04/09 04:06:43	483
+++ trunk/OOPSE/libmdtools/ExtendedSystem.hpp	2003/04/10 16:35:31	488
@@ -21,6 +21,7 @@ class ExtendedSystem{ (public)
   
   void NoseHooverNVT(double dt, double ke);
   void NoseHooverAndersonNPT(double dt, double ke, double p_tensor[9]);
+  void ConstantStress(double dt, double ke, double p_tensor[9]);
   void AffineTransform(double oldBox[3], double newBox[3]);
 
 protected:
@@ -42,6 +43,9 @@ class ExtendedSystem{ (public)
   // zeta and epsilonDot are propagated
   double zeta;
   double epsilonDot;
+  double epsilonDotX;
+  double epsilonDotY;
+  double epsilonDotZ;
 
   // qmass, tauRelax, targetTemp, and targetPressure are parameters that
   // must be set