--- trunk/OOPSE/libmdtools/Integrator.hpp	2004/06/04 19:30:05	1248
+++ trunk/OOPSE/libmdtools/Integrator.hpp	2004/06/09 16:16:33	1254
@@ -91,7 +91,7 @@ typedef Integrator<BaseIntegrator> RealIntegrator;
 typedef Integrator<BaseIntegrator> RealIntegrator;
 
 // ansi instantiation
-//template class Integrator<BaseIntegrator>;
+template class Integrator<BaseIntegrator>;
 
 template<typename T> class NVE : public T {
 
@@ -492,4 +492,19 @@ template<typename T> class ZConstraint : public T { (p
 
 };
 
+
+//Sympletic quaternion Scheme Integrator
+//Reference:
+// T.F. Miller, M. Eleftheriou, P. Pattnaik, A. Ndirango, D. Newns and G.J. Martyna
+//Symplectic quaternion Scheme for biophysical molecular dynamics
+//116(20), 8649, J. Chem. Phys. (2002)
+template<typename T> class SQSIntegrator : public T{
+  public:
+    virtual void moveA();
+    virtual void moveB();
+  protected:
+    void freeRotor();
+    void rotate(int k, double dt);
+    
+};
 #endif