Import Geant4 10.0.0 source tree

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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * 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.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+//
+// $Id: $
+//
+//---------------------------------------------------------------
+//
+// G4BOptnForceFreeFlight
+//
+// Class Description:
+//    A G4VBiasingOperation physics-based biasing operation.
+//    If forces the physics process to not act on the track.
+//    In this implementation (meant for the ForceCollision
+//    operator) the free flight is done under zero weight for
+//    the track, and the action is meant to accumulate the weight
+//    change for making this uninteracting flight,
+//    cumulatedWeightChange.
+//    When the track reaches the current volume boundary, its
+//    weight is restore with value :
+//            initialWeight * cumulatedWeightChange
+//
+//---------------------------------------------------------------
+//   Initial version                         Nov. 2013 M. Verderi
+#ifndef G4BOptnForceFreeFlight_hh
+#define G4BOptnForceFreeFlight_hh 1
+
+#include "G4VBiasingOperation.hh"
+#include "G4ForceCondition.hh"
+class G4ILawForceFreeFlight;
+
+class G4BOptnForceFreeFlight : public G4VBiasingOperation {
+public:
+  // -- Constructor :
+  G4BOptnForceFreeFlight(G4String name);
+  // -- destructor:
+  virtual ~G4BOptnForceFreeFlight();
+  
+public:
+  // -- Methods from G4VBiasingOperation interface:
+  // -------------------------------------------
+  // -- Used:
+  virtual const G4VBiasingInteractionLaw* ProvideOccurenceBiasingInteractionLaw( const G4BiasingProcessInterface* );
+  virtual G4ForceCondition                                ProposeForceCondition( const G4ForceCondition ) {return Forced;}
+  virtual G4bool                                        DenyProcessPostStepDoIt( const G4BiasingProcessInterface*, const G4Track*, const G4Step*, G4double& );
+  virtual void                                                      AlongMoveBy( const G4BiasingProcessInterface*, const G4Step*, G4double );
+
+  // -- Unused:
+  virtual G4VParticleChange*                       ApplyFinalStateBiasing( const G4BiasingProcessInterface*,
+									   const G4Track*,
+									   const G4Step*  ) {return 0;}
+  virtual G4double                               DistanceToApplyOperation( const G4Track*,
+									   G4double,
+									   G4ForceCondition*) {return DBL_MAX;}
+  virtual G4VParticleChange*                    GenerateBiasingFinalState( const G4Track*,
+									   const G4Step*  ) {return 0;}
+
+
+public:
+  // -- Additional methods, specific to this class:
+  // ----------------------------------------------
+  // -- return concrete type of interaction law:
+  G4ILawForceFreeFlight* GetForceFreeFlightLaw() {
+    return fForceFreeFlightInteractionLaw;
+  }
+  // -- initialization for weight:
+  void ResetInitialTrackWeight(G4double w) {fInitialTrackWeight = w; fCumulatedWeightChange = 1.0;}
+  
+private:
+  G4ILawForceFreeFlight* fForceFreeFlightInteractionLaw;
+  G4double fCumulatedWeightChange, fInitialTrackWeight;
+};
+
+#endif