Import Geant4 0.0.0 source tree

examples/novice/N02/include/ExN02MagneticField.hh

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+// This code implementation is the intellectual property of
+// the RD44 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: ExN02MagneticField.hh,v 1.1 1998/10/09 14:31:03 japost Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+//
+//    A class for control of the Magnetic Field of the detector.
+//  The field is assumed to be uniform.
+// 
+//  $ Id:  $
+
+// Should this be a:
+//    i) messenger
+//   ii) user class that creates the field       ? 
+//  iii) simply a derived class of Uniform field ?  <== I have chosen this now.
+//   iv) a field manager that creates/updates field    (Prefered?)
+#ifndef ExN02MagneticField_H
+#define ExN02MagneticField_H
+
+#include "G4UniformMagField.hh"
+class G4FieldManager;
+
+class ExN02MagneticField: public G4UniformMagField
+{
+  public:
+      ExN02MagneticField(G4ThreeVector);  //  The value of the field
+      ExN02MagneticField();               //  A zero field
+      ~ExN02MagneticField();  
+      
+      // Set the field to (0, 0, fieldValue)
+      void SetFieldValue(G4ThreeVector fieldVector);
+      void SetFieldValue(G4double      fieldValue);
+      G4ThreeVector GetConstantFieldValue();
+
+  protected:
+
+      // Find the global Field Manager
+      G4FieldManager* GetGlobalFieldManager();   // static 
+};
+
+#endif