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// $Id$
//

#ifndef G4VPrimaryGenerator_h
#define G4VPrimaryGenerator_h 1

#include "G4ThreeVector.hh"

class G4Event;

// class description:
//
//  This is an abstract base class of all of primary generators.
// This class has only one pure virtual method GeneratePrimaryVertex()
// which takes a G4Event object and generates a primay vertex and
// primary particles associate to the vertex.
//

class G4VPrimaryGenerator
{
  public: // with description
  // static service method for checking a point is included in the (current) world
     static G4bool CheckVertexInsideWorld(const G4ThreeVector& pos);

  public: // with description
     // Constructor and destrucot of this base class
     G4VPrimaryGenerator();
     virtual ~G4VPrimaryGenerator();

     // Pure virtual method which a concrete class derived from this base class must
     // have a concrete implementation
     virtual void GeneratePrimaryVertex(G4Event* evt) = 0;

  protected:
     G4ThreeVector         particle_position;
     G4double              particle_time;

  public:
     G4ThreeVector GetParticlePosition()
     { return particle_position; }
     G4double GetParticleTime()
     { return particle_time; }
     void SetParticlePosition(G4ThreeVector aPosition)
     { particle_position = aPosition; }
     void SetParticleTime(G4double aTime)
     { particle_time = aTime; }

};

#endif