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: G4ParallelTransport.hh,v 1.4 2002/05/02 08:43:23 dressel Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+// ----------------------------------------------------------------------
+// Class G4ParallelTransport
+//
+// Class description:
+//
+// Used internally by importance sampling and scoring in a "parallel"
+// geometry.
+// This process "moves" a particle in a "parallel" geometry.
+// It should be placed in the post step process do it vector after the 
+// G4Transportation process.
+
+// Author: Michael Dressel (Michael.Dressel@cern.ch)
+// ----------------------------------------------------------------------
+#ifndef G4ParallelTransport_hh
+#define G4ParallelTransport_hh G4ParallelTransport_hh
+
+#include "g4std/strstream"
+
+#include "G4VProcess.hh"
+#include "globals.hh"
+
+class G4VPGeoDriver;
+class G4VParallelStepper;
+
+class G4ParallelTransport : public G4VProcess
+{
+
+public:  // with description
+
+  G4ParallelTransport(G4VPGeoDriver &pgeodriver, 
+		      G4VParallelStepper &aStepper,
+		      const G4String &aName = "ParallelTransport");
+    // create G4ParticleChange
+
+  virtual ~G4ParallelTransport();
+    // delete G4ParticleChange
+
+  // the post step pair of functions may be overwritten
+  // in certain derived classes like the importance process
+
+  virtual G4double 
+  PostStepGetPhysicalInteractionLength(const G4Track& aTrack,
+				       G4double   previousStepSize,
+				       G4ForceCondition* condition);
+    // straight distance to the boundary in the "parallel" geometry
+    // in the direction of the track   
+
+  virtual G4VParticleChange *PostStepDoIt(const G4Track&, const G4Step&);
+    // move a track in a "parallel" geometry
+    // and update a G4PArallelStepper
+
+  virtual void StartTracking();
+  virtual void EndTracking();
+
+
+  G4VParallelStepper &GetPStepper(){return fPStepper;}
+    // get the fPStepper
+
+public:  // without description
+  
+  //  no operation in  AtRestDoIt and  AlongStepDoIt
+
+  G4double AlongStepGetPhysicalInteractionLength(const G4Track&,
+                                        G4double  ,
+                                        G4double  ,
+                                        G4double& ,
+                                        G4GPILSelection*) {return -1.0;}
+  G4double AtRestGetPhysicalInteractionLength(const G4Track& ,
+                                        G4ForceCondition*) {return -1.0;}
+  
+  G4VParticleChange*  AtRestDoIt(const G4Track&, const G4Step&) {return 0;}
+  G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&) {return 0;}
+
+protected:
+
+  virtual void Error(const G4String &m);
+  virtual void Warning(const G4String &m);
+
+  G4ParticleChange *fParticleChange;
+
+
+private:
+
+  G4ParallelTransport(const G4ParallelTransport &);
+  G4ParallelTransport &operator=(const G4ParallelTransport &);
+
+private:
+
+  G4VPGeoDriver &fPgeodriver;
+  G4VParallelStepper &fPStepper;
+  G4bool fCrossBoundary;
+  G4bool fInitStep;
+
+};
+
+#endif