G4ErrorPropagationNavigator.hh

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// $Id$
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//
// --------------------------------------------------------------------
//      GEANT 4 class header file 
// --------------------------------------------------------------------
//
// Class Description:
//
// Class for performing double navigation in the detector geometry and
// on the target surface for error propagation. It overloads ComputeStep()
// and ComputeSafety() methods.
 
// History:
// - Created. P. Arce, September 2004
// --------------------------------------------------------------------
 
#ifndef G4ErrorPropagationNavigator_hh
#define G4ErrorPropagationNavigator_hh
 
#include "G4Navigator.hh"
#include "G4ThreeVector.hh"
 
class G4ErrorPropagationNavigator : public G4Navigator
{
  public:  // with description
 
    G4ErrorPropagationNavigator();
   ~G4ErrorPropagationNavigator();
  
    G4double ComputeStep (const G4ThreeVector &pGlobalPoint,
                          const G4ThreeVector &pDirection,
                          const G4double pCurrentProposedStepLength,
                          G4double &pNewSafety);
      // Calls the navigation in the detector geometry and then checks
      // if the distance to surface is smaller than the proposed step
 
    G4double ComputeSafety(const G4ThreeVector &globalpoint,
                           const G4double pProposedMaxLength = DBL_MAX,
                           const G4bool keepState = true);
      // Calls the navigation in the detector geometry and then checks
      // if the distance to surface is smaller than the proposed safety
 
};
 
#endif