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: G4ParallelNavigator.hh,v 1.3 2002/04/10 13:13:06 dressel Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+// ----------------------------------------------------------------------
+// Class G4ParallelNavigator
+//
+// Class description:
+//
+// Used internaly for importance sampling and scoring in a "parallel"
+// geometry. 
+// It implements the interface G4VPGeoDriver (see G4VPGeoDriver.hh).
+// It uses a G4Navigator.
+
+// Author: Michael Dressel (Michael.Dressel@cern.ch)
+// ----------------------------------------------------------------------
+#ifndef G4ParallelNavigator_hh
+#define G4ParallelNavigator_hh G4ParallelNavigator_hh
+
+#include "G4VPGeoDriver.hh"
+#include "geomdefs.hh"
+
+class G4VTouchable;
+class G4Navigator;
+class G4PTouchableKey ;
+class G4VPhysicalVolume;
+
+class G4ParallelNavigator : public G4VPGeoDriver
+{
+
+public:  // with description
+
+  G4ParallelNavigator(G4VPhysicalVolume &aWorldVolume);
+    // initialise and create G4Navigator and a TouchableHistory
+
+  ~G4ParallelNavigator();
+    // delete Touchable and Navigator
+
+  G4PTouchableKey LocateOnBoundary(const G4ThreeVector &aPosition, 
+		                   const G4ThreeVector &aDirection);
+    // The location of a track according to it's position
+    // and direction in case the track crosses a boundary
+    // of a "parallel" geometry.
+    // Must be called in the PostDOIT of the ParallelTransportation.
+    // (The track crosses the boundary if PostDOIT gets called.)
+  
+
+  G4PTouchableKey GetCurrentTouchableKey() const;
+    // get the current G4PTouchableKey of the "parallel" geometry
+
+  G4double ComputeStepLengthInit(const G4ThreeVector &aPosition, 
+				 const G4ThreeVector &aDirection);
+    // compute step length for a starting track. 
+  
+  G4double ComputeStepLengthCrossBoundary(const G4ThreeVector &aPosition, 
+					  const G4ThreeVector &aDirection);
+    // compute the step length after a track crossed a boundary
+    // in a "parallel" geometry
+  
+  G4double ComputeStepLengthInVolume(const G4ThreeVector &aPosition, 
+				     const G4ThreeVector &aDirection);
+    // compute step length when track moves inside a volume.  
+  
+private:
+
+  G4ParallelNavigator(const G4ParallelNavigator &);
+  G4ParallelNavigator &operator=(const G4ParallelNavigator &);
+
+  G4double ComputeStepLengthShifted(const G4String &m,
+				    const G4ThreeVector &aPosition, 
+				    const G4ThreeVector &aDirection);
+
+  void Locate(const G4ThreeVector &aPosition, 
+	      const G4ThreeVector &aDirection,
+	      G4bool histsearch); 
+			
+  void Error(const G4String &m,
+             const G4ThreeVector &pos,
+             const G4ThreeVector &dir);
+
+  G4double Shift(G4double d);
+
+private:
+  
+  G4Navigator &fNavigator;
+  G4VTouchable *fCurrentTouchable;
+  G4int fNlocated;
+};
+
+#endif
+
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