Gabriele Cosmo
88 lines
4.0 KiB
C++
88 lines
4.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4ErrorPropagationNavigator.hh 87697 2014-12-17 09:40:21Z gcosmo $
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//
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//
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// --------------------------------------------------------------------
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// GEANT 4 class header file
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// --------------------------------------------------------------------
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//
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// Class Description:
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//
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// Class for performing double navigation in the detector geometry and
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// on the target surface for error propagation. It overloads ComputeStep()
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// and ComputeSafety() methods.
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// History:
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// - Created. P. Arce, September 2004
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// --------------------------------------------------------------------
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#ifndef G4ErrorPropagationNavigator_hh
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#define G4ErrorPropagationNavigator_hh
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#include "G4Navigator.hh"
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#include "G4ThreeVector.hh"
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class G4ErrorPropagationNavigator : public G4Navigator
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{
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public: // with description
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G4ErrorPropagationNavigator();
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~G4ErrorPropagationNavigator();
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G4double ComputeStep (const G4ThreeVector &pGlobalPoint,
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const G4ThreeVector &pDirection,
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const G4double pCurrentProposedStepLength,
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G4double &pNewSafety);
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// Calls the navigation in the detector geometry and then checks
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// if the distance to surface is smaller than the proposed step
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G4double ComputeSafety(const G4ThreeVector &globalpoint,
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const G4double pProposedMaxLength = DBL_MAX,
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const G4bool keepState = true);
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// Calls the navigation in the detector geometry and then checks
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// if the distance to surface is smaller than the proposed safety
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G4ThreeVector GetGlobalExitNormal(const G4ThreeVector& point,
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G4bool* valid);
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// Return Exit Surface Normal and validity too. Can only be called if
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// the Navigator's last Step has crossed a volume geometrical boundary.
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// Normal points out of the volume exited and/or into the volume entered.
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G4double TargetSafetyFromPoint( const G4ThreeVector &pGlobalpoint );
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// Isotropic safety for 'Target'
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//-- NOT implemented, as it is difficult to define the coordinate system:
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// G4ThreeVector GetLocalExitNormal(G4bool* valid);
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// G4ThreeVector GetLocalExitNormalAndCheck(const G4ThreeVector& point,
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// G4bool* valid);
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// Convention:
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// The *local* normal is in the coordinate system of the *final* volume.
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};
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#endif
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