Import Geant4 4.1.0 source tree

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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// $Id: G4VIStore.hh,v 1.3 2002/04/10 13:13:07 dressel Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+// ----------------------------------------------------------------------
+// Class G4VIStore
+//
+// Class description:
+//
+// An interface of an "importance store" used by importance sampling.
+// It defines how a importance value together with a "cell" 
+// (a G4VPhysicalVolume and a replica number) has to be added
+// to the "importance store" and how a importance value can be derived 
+// from the "importance store". 
+// 
+
+// Author: Michael Dressel (Michael.Dressel@cern.ch)
+// ----------------------------------------------------------------------
+#ifndef G4VIStore_hh
+#define G4VIStore_hh G4VIStore_hh
+
+#include "globals.hh"
+
+class G4PTouchableKey;
+class G4VPhysicalVolume;
+
+class  G4VIStore
+{
+
+public:  // with description
+
+  G4VIStore(G4VPhysicalVolume &worldVolume){}
+  virtual  ~G4VIStore(){}
+
+  virtual void AddImportanceRegion(G4double importance,
+				   const G4VPhysicalVolume &,
+				   G4int aRepNum = 0) = 0;
+    // Add a "cell" together with a importance value to the store.
+
+  virtual void ChangeImportance(G4double importance,
+				const G4VPhysicalVolume &,
+				G4int aRepNum = 0) = 0;
+    // Change a importance value of a "cell".
+
+  virtual G4double GetImportance(const G4VPhysicalVolume &,
+				 G4int aRepNum = 0) const = 0;
+    // derive the importance value of a "cell" from the store.
+
+  virtual G4double GetImportance(const G4PTouchableKey &ptk) const = 0;
+    // derive a importance value of a "cell" addresed by a G4PTouchableKey
+    // from the store.
+
+  virtual G4VPhysicalVolume &GetWorldVolume() = 0;
+};
+
+#endif