Import Geant4 10.4.0 source tree

2017-12-08 12:52:30 +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.          *
+// ********************************************************************
+//
+//
+// $Id: $
+//
+// Helper namespace 'field_utils'
+//
+// Description:
+//    Simple methods to extract vectors from arrays in conventions of
+//     the magnetic field integration
+//
+//    Implementation by Dmitry Sorokin - GSoC 2017
+//       Work supported by Google as part of Google Summer of Code 2017.
+//    Supervision / code review: John Apostolakis
+
+#ifndef G4FIELD_UTILS_HH
+#define G4FIELD_UTILS_HH
+
+#include "G4Types.hh"
+#include "G4ThreeVector.hh"
+
+namespace field_utils {
+
+enum class Value3D {
+    Position = 0,
+    Momentum = 3,
+    Spin = 9
+};
+
+enum class Value1D {
+    KineticEnergy = 6,
+    LabTime = 7,
+    ProperTime = 8
+};
+
+template <typename ArrayType>
+G4double getValue(const ArrayType& array, Value1D value);
+
+template <typename ArrayType>
+G4double getValue2(const ArrayType& array, Value1D value);
+
+template <typename ArrayType>
+G4double getValue(const ArrayType& array, Value3D value);
+
+template <typename ArrayType>
+G4double getValue2(const ArrayType& array, Value3D value);
+
+template <typename ArrayType>
+G4ThreeVector makeVector(const ArrayType& array, Value3D value);
+
+G4double relativeError(
+    const G4double y[],
+    const G4double yerr[],
+    const G4double hstep,
+    const G4double errorTolerance = 1);
+
+} // field_utils
+
+#include "G4FieldUtils.icc"
+
+#endif