Gabriele Cosmo
213 lines
9.7 KiB
C++
213 lines
9.7 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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// $Id$
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//
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//
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// Class G4VIntersectionLocator
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//
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// class description:
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//
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// Base class for the calculation of the intersection point with a boundary
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// when PropagationInField is used.
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// Gives possibility to choose the method of intersection; concrete locators
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// implemented are: G4SimpleLocator, G4MultiLevelLocator, G4BrentLocator.
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//
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// Key Method: EstimateIntersectionPoint()
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// History:
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// -------
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// 27.10.08 - John Apostolakis, Tatiana Nikitina: Design and implementation
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// ---------------------------------------------------------------------------
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#ifndef G4VINTERSECTIONLOCATOR_HH
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#define G4VINTERSECTIONLOCATOR_HH
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#include "G4Types.hh"
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#include "G4ThreeVector.hh"
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#include "G4FieldTrack.hh"
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#include "G4Navigator.hh"
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#include "G4ChordFinder.hh"
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class G4VIntersectionLocator
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{
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public: // with description
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G4VIntersectionLocator(G4Navigator *theNavigator);
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// Constructor
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virtual ~G4VIntersectionLocator();
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// Default destructor
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virtual G4bool EstimateIntersectionPoint(
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const G4FieldTrack& curveStartPointTangent, // A
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const G4FieldTrack& curveEndPointTangent, // B
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const G4ThreeVector& trialPoint, // E
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G4FieldTrack& intersectPointTangent, // Output
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G4bool& recalculatedEndPoint, // Out
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G4double& fPreviousSafety, // In/Out
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G4ThreeVector& fPreviousSftOrigin) = 0; // In/Out
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// If such an intersection exists, this function calculates the
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// intersection point of the true path of the particle with the surface
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// of the current volume (or of one of its daughters).
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// Should use lateral displacement as measure of convergence
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// NOTE: changes the safety!
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void printStatus( const G4FieldTrack& startFT,
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const G4FieldTrack& currentFT,
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G4double requestStep,
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G4double safety,
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G4int step);
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// Print Method, useful mostly for debugging
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inline G4bool IntersectChord( const G4ThreeVector& StartPointA,
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const G4ThreeVector& EndPointB,
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G4double &NewSafety,
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G4double &PreviousSafety, // In/Out
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G4ThreeVector &PreviousSftOrigin, // In/Out
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G4double &LinearStepLength,
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G4ThreeVector &IntersectionPoint,
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G4bool *calledNavigator=0 );
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// Intersect the chord from StartPointA to EndPointB and return
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// whether an intersection occurred. NOTE: changes the Safety!
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inline void SetEpsilonStepFor( G4double EpsilonStep );
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inline void SetDeltaIntersectionFor( G4double deltaIntersection );
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inline void SetNavigatorFor( G4Navigator *fNavigator );
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inline void SetChordFinderFor(G4ChordFinder *fCFinder );
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// These parameters must be set at each step, in case they were changed
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// Note: This simple approach ensures that all scenarios are considered.
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// [ Future refinement may identify which are invariant during a
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// track, run or event ]
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inline void SetVerboseFor(G4int fVerbose);
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inline G4int GetVerboseFor();
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// Controling verbosity enables checking of the locating of intersections
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public: // without description
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// Additional inline Set/Get methods for parameters, dependent objects
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inline G4double GetDeltaIntersectionFor();
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inline G4double GetEpsilonStepFor();
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inline G4Navigator* GetNavigatorFor();
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inline G4ChordFinder* GetChordFinderFor();
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inline void SetSafetyParametersFor(G4bool UseSafety );
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inline void AddAdjustementOfFoundIntersection(G4bool UseCorrection);
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inline G4bool GetAdjustementOfFoundIntersection();
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// Methods to be made Obsolete - replaced by methods below
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inline void AdjustIntersections(G4bool UseCorrection);
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inline G4bool AreIntersectionsAdjusted(){ return fUseNormalCorrection; }
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// Change adjustment flag ( New Interface )
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protected: // with description
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G4FieldTrack ReEstimateEndpoint( const G4FieldTrack &CurrentStateA,
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const G4FieldTrack &EstimtdEndStateB,
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G4double linearDistSq,
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G4double curveDist);
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// Return new estimate for state after curveDist starting from
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// CurrentStateA, to replace EstimtdEndStateB, and report displacement
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// (if field is compiled verbose)
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G4ThreeVector GetSurfaceNormal(const G4ThreeVector &CurrentInt_Point,
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G4bool &validNormal); // const
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// Position *must* be the intersection point from last call
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// to G4Navigator's ComputeStep (via IntersectChord )
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// Will try to use cached (last) value in Navigator for speed,
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// if it was kept and valid.
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// Value returned is in global coordinates.
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// It does NOT guarantee to obtain Normal. This can happen eg if:
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// - the "Intersection" Point is not on a surface, potentially due to
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// - inaccuracies in the transformations used, or
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// - issues with the Solid.
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G4ThreeVector GetGlobalSurfaceNormal(const G4ThreeVector &CurrentE_Point,
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G4bool &validNormal);
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// Return the SurfaceNormal of Intersecting Solid in global coordinates
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// Costlier then GetSurfaceNormal
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G4bool AdjustmentOfFoundIntersection(const G4ThreeVector &A,
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const G4ThreeVector &CurrentE_Point,
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const G4ThreeVector &CurrentF_Point,
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const G4ThreeVector &MomentumDir,
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const G4bool IntersectAF,
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G4ThreeVector &IntersectionPoint,
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G4double &NewSafety,
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G4double &fPrevSafety,
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G4ThreeVector &fPrevSftOrigin );
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// Optional method for adjustment of located intersection point
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// using the surface-normal
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void ReportTrialStep( G4int step_no,
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const G4ThreeVector& ChordAB_v,
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const G4ThreeVector& ChordEF_v,
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const G4ThreeVector& NewMomentumDir,
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const G4ThreeVector& NormalAtEntry,
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G4bool validNormal );
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// Print a three-line report on the current "sub-step", ie trial intersection
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private: // no description
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G4ThreeVector GetLocalSurfaceNormal(const G4ThreeVector &CurrentE_Point,
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G4bool &validNormal);
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// Return the SurfaceNormal of Intersecting Solid in local coordinates
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G4ThreeVector GetLastSurfaceNormal( const G4ThreeVector& intersectPoint,
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G4bool &validNormal) const;
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// Position *must* be the intersection point from last call
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// to G4Navigator's ComputeStep (via IntersectChord )
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// Temporary - will use the same method in the Navigator
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protected:
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G4double kCarTolerance; // Constant
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G4int fVerboseLevel; // For debugging
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G4bool fUseNormalCorrection; // Configuration parameter
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G4Navigator *fiNavigator;
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G4ChordFinder *fiChordFinder;
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G4double fiEpsilonStep;
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G4double fiDeltaIntersection;
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G4bool fiUseSafety;
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// Parameters set at each physical step by calling method
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// by G4PropagatorInField
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G4Navigator *fHelpingNavigator;
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// Helper for location
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G4TouchableHistory *fpTouchable;
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// Touchable history hook
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};
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#include "G4VIntersectionLocator.icc"
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#endif
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