new interface class for magnetic field plugin

FullSimLight/CMakeLists.txt

@@ -293,7 +293,8 @@ install( TARGETS FullSimLight
 
    
 install(FILES include/FSLSensitiveDetectorPlugin.h 
-   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/FullSimLight
-   COMPONENT Development )
+              include/MagFieldPlugin.h 
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/FullSimLight
+  COMPONENT Development )
 
 

FullSimLight/include/MagFieldPlugin.h

+#ifndef _MAGFIELDPLUGIN_H_
+#define _MAGFIELDPLUGIN_H_
+class G4MagneticField;
+class MagFieldPlugin {
+
+ public:
+
+  // Constructor
+  MagFieldPlugin()=default;
+  
+  // Destructor
+  virtual ~MagFieldPlugin()=default;
+  
+  virtual const G4MagneticField *getField() const=0;
+  
+ private:
+  
+  MagFieldPlugin (const MagFieldPlugin &)=delete;
+
+  MagFieldPlugin & operator=(const MagFieldPlugin &)=delete;
+};
+
+
+#endif