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//
//
// $Id$
//
// 
// class G4AuxiliaryNavServices
//
// Class description:
//
// Utility class for navigation.

// History:
// - Created: Paul Kent, Aug 96
// --------------------------------------------------------------------
#ifndef G4AuxiliaryNavServices_hh
#define G4AuxiliaryNavServices_hh

#include "G4Types.hh"
#include "G4ThreeVector.hh"
#include "G4VSolid.hh"
#include "G4AffineTransform.hh"

class G4AuxiliaryNavServices
{

 public:  // with description

   static G4bool CheckPointOnSurface( const G4VSolid* sampleSolid, 
                                      const G4ThreeVector& localPoint, 
                                      const G4ThreeVector* globalDirection, 
                                      const G4AffineTransform& sampleTransform,
                                      const G4bool locatedOnEdge);
     //
     // Is the track (point, direction) inside the solid 'sampleSolid' ? 
     // Returns true if we are going to enter the volume,
     // which is the case if:
     //   - the point is inside
     //   - the point is on the surface and the direction points inside
     //     or along it.
     // Else returns false.

   static G4bool CheckPointExiting( const G4VSolid* sampleSolid, 
                                    const G4ThreeVector& localPoint, 
                                    const G4ThreeVector* globalDirection, 
                                    const G4AffineTransform& sampleTransform );
     //
     // Is the track (point, direction) exiting the solid 'sampleSolid' ? 
     // Returns true if we are going to exit the volume.

 private:
 
   G4bool testOne();

};

#include "G4AuxiliaryNavServices.icc"

#endif