Import Geant4 8.2.0 source tree

2016-06-09 14:55:03 +02:00
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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: G4SafetyHelper.hh,v 1.3 2006/10/31 16:53:06 japost Exp $
+// GEANT4 tag $Name: geant4-08-02 $
+//
+//
+// class G4SafetyHelper
+//
+// Class description:
+//
+// This class is a helper for physics processes which require 
+// knowledge of the safety, and the step size for the 'mass' geometry
+
+// First version:  J. Apostolakis,  July 5th, 2006
+// --------------------------------------------------------------------
+
+#ifndef G4SAFETYHELPER_HH
+#define G4SAFETYHELPER_HH 1
+
+#include <vector>
+#include "G4Types.hh"
+#include "G4ThreeVector.hh"
+
+class G4Navigator;
+class G4PathFinder;
+
+class G4SafetyHelper
+{
+  public: // with description
+
+   G4SafetyHelper(); 
+   ~G4SafetyHelper();
+     //
+     // Constructor and destructor
+
+   G4double ComputeMassStep( const G4ThreeVector &position, 
+                             const G4ThreeVector &direction,
+                                   G4double  &newSafety );
+     //
+     // Return step for mass geometry
+
+   G4double ComputeSafety( const G4ThreeVector& pGlobalPoint ); 
+     //
+     // Return safety for all geometries
+
+   void ReLocateWithinVolume(const G4ThreeVector& pGlobalPoint );
+     //
+     // Relocate the point in the volume of interest
+
+public: // with description
+   static void EnableParallelNavigation(G4bool parallel) 
+     { fUseParallelGeometries= parallel; } 
+     // 
+     //  To have parallel worlds considered, must be true.
+     //  Alternative is to use single (mass) Navigator directly
+
+   void InitialiseNavigator();
+     //
+     // Check for new navigator for tracking, and reinitialise pointer
+
+private:
+
+   G4PathFinder* fpPathFinder;
+   G4Navigator*  fpMassNavigator;
+   G4int         fMassNavigatorId;
+
+   static G4bool        fUseParallelGeometries; 
+   // Flag whether to use PathFinder or single (mass) Navigator directly
+
+};
+
+#endif