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: G4ImportanceAlgorithm.hh,v 1.3 2002/04/10 13:13:06 dressel Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+// ----------------------------------------------------------------------
+// Class G4ImportanceAlgorithm
+//
+// Class description:
+//
+// An implementation of a G4VImportanceAlgorithm (see description in
+// G4VImportanceAlgorithm.hh).
+
+// Author: Michael Dressel (Michael.Dressel@cern.ch)
+// ----------------------------------------------------------------------
+#ifndef G4ImportanceAlgorithm_hh
+#define G4ImportanceAlgorithm_hh G4ImportanceAlgorithm_hh
+
+#include "G4VImportanceAlgorithm.hh"
+
+class G4ImportanceAlgorithm : public G4VImportanceAlgorithm
+{
+
+public:  // with description
+
+  G4ImportanceAlgorithm();
+    // simple construction
+
+  ~G4ImportanceAlgorithm();
+    // repeate warning if triggered
+
+  G4Nsplit_Weight Calculate(G4double ipre_over_ipost, 
+			    G4double init_w) const;
+    // calculate the number of tracks and their weight according 
+    // to the ratio of pre over post importance and the weight of
+    // the mother track.  
+private:
+
+  void Error(const G4String &m) const;
+  void Warning(const G4String &m) const;
+
+private:
+
+  mutable G4bool fWorned;
+};
+
+#endif