Import Geant4 11.2.0 source tree

2023-12-08 10:43:34 +01:00
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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.          *
+// ********************************************************************
+//
+// G4NavigationHistory
+//
+// Class description:
+//
+// Responsible for maintenance of the history of the path taken through
+// the geometrical hierarchy. Principally a utility class for use by the
+// G4Navigator.
+
+// 25.07.96 - P.Kent Initial version. Services derived from
+//                   requirements of G4Navigator.
+// ----------------------------------------------------------------------
+#ifndef G4NAVIGATIONHISTORY_HH
+#define G4NAVIGATIONHISTORY_HH
+
+#include <assert.h>
+#include <vector>
+#include <iostream>
+
+#include "geomdefs.hh"
+#include "geomwdefs.hh"
+#include "G4AffineTransform.hh"
+#include "G4VPhysicalVolume.hh"
+#include "G4NavigationLevel.hh"
+#include "G4NavigationHistoryPool.hh"
+#include "G4Allocator.hh"
+
+class G4NavigationHistory
+{
+
+ public:  // with description
+
+  friend std::ostream&
+  operator << (std::ostream& os, const G4NavigationHistory& h);
+
+  G4NavigationHistory();
+    // Constructor: sizes history lists & resets histories.
+
+  ~G4NavigationHistory();
+    // Destructor.
+
+  G4NavigationHistory(const G4NavigationHistory& h);
+    // Copy constructor.
+
+  inline G4NavigationHistory& operator=(const G4NavigationHistory& h);
+    // Assignment operator.
+
+  inline void Reset();
+    // Resets history. It now does clear most entries.
+    // Level 0 is preserved.
+
+  inline void Clear();
+    // Clears entries, zeroing transforms, matrices & negating
+    // replica history.
+
+  inline void SetFirstEntry(G4VPhysicalVolume* pVol);
+    // Setup initial entry in stack: copies through volume transform & matrix.
+    // The volume is assumed to be unrotated.
+
+  inline const G4AffineTransform& GetTopTransform() const; 
+    // Returns topmost transform.
+
+  inline const G4AffineTransform* GetPtrTopTransform() const;
+    // Returns pointer to topmost transform.
+
+  inline G4int GetTopReplicaNo() const;
+    // Returns topmost replica no record.
+
+  inline EVolume GetTopVolumeType() const;
+    // Returns topmost volume type.
+
+  inline G4VPhysicalVolume* GetTopVolume() const;
+    // Returns topmost physical volume pointer.
+
+  inline std::size_t GetDepth() const;
+    // Returns current history depth.
+
+  inline std::size_t GetMaxDepth() const;
+    // Returns current maximum size of history.
+    // Note: MaxDepth of 16 mean history entries [0..15] inclusive.
+
+  inline const G4AffineTransform& GetTransform(G4int n) const;
+    // Returns specified transformation.
+
+  inline G4int GetReplicaNo(G4int n) const;
+    // Returns specified replica no record.
+
+  inline EVolume GetVolumeType(G4int n) const;
+    // Returns specified volume type.
+
+  inline G4VPhysicalVolume* GetVolume(G4int n) const;
+    // Returns specified physical volume pointer.
+
+  inline void NewLevel(G4VPhysicalVolume* pNewMother,
+                       EVolume vType = kNormal,
+                       G4int nReplica = -1);
+    // Changes navigation level to that of the new mother.
+
+  inline void BackLevel();
+    // Back up one level in history: from mother to grandmother.
+    // It does not erase history record of current mother.
+
+  inline void BackLevel(G4int n);
+    // Back up specified number of levels in history.
+
+  inline void *operator new(std::size_t);
+    // Override "new" for "G4Allocator".
+  inline void operator delete(void *aHistory);
+    // Override "delete" for "G4Allocator".
+
+ private:
+
+  inline void EnlargeHistory();
+    // Enlarge history if required: increase size by kHistoryStride.
+    // Note that additional history entries are `dirty' (non zero) apart
+    // from the volume history.
+
+ private:
+
+  std::vector<G4NavigationLevel>* fNavHistory;
+    // Pointer to the vector of navigation levels.
+
+  std::size_t fStackDepth{0};
+    // Depth of stack: effectively depth in geometrical tree.
+};
+
+#include "G4NavigationHistory.icc"
+
+#endif