Gabriele Cosmo
121 lines
5.5 KiB
C++
121 lines
5.5 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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// G4MultiLevelLocator
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//
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// Class description:
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//
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// Implementing the calculation of the intersection point with a boundary when
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// PropagationInField is used. Derived from method LocateIntersectionPoint()
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// from G4PropagatorInField, it is based on a linear method for finding the
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// intersection point by means of a 'depth' algorithm in case of slow progress
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// (intersection is not found after 100 trials).
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// Author: Tatiana Nikitina (CERN), 27 October 2008
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// ---------------------------------------------------------------------------
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#ifndef G4MULTILEVELLOCATOR_HH
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#define G4MULTILEVELLOCATOR_HH 1
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#include "G4VIntersectionLocator.hh"
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/**
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* @brief G4MultiLevelLocator implements the calculation of the intersection
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* point with a boundary when G4PropagationInField is used. Derived from method
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* LocateIntersectionPoint() from G4PropagatorInField, it is based on a linear
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* method for finding the intersection point by means of a 'depth' algorithm
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* in case of slow progress (intersection is not found after 100 trials).
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*/
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class G4MultiLevelLocator : public G4VIntersectionLocator
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{
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public:
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/**
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* Constructor and Destructor.
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*/
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G4MultiLevelLocator(G4Navigator *theNavigator);
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~G4MultiLevelLocator() override;
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/**
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* If such an intersection exists, this method calculates the intersection
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* point of the true path of the particle with the surface of the current
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* volume (or of one of its daughters).
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* Should use lateral displacement as measure of convergence.
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* @param[in] curveStartPointTangent Start point tangent track.
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* @param[in] curveEndPointTangent End point tangent track.
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* @param[in] trialPoint Trial point.
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* @param[out] intersectPointTangent Intersection point tangent track.
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* @param[out] recalculatedEndPoint Flagging if end point was recomputed.
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* @param[in,out] fPreviousSafety Previous safety distance.
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* @param[in,out] fPreviousSftOrigin Previous safety point origin.
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* @returns Whether intersection exists or not.
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*/
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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) override; // In/Out
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/**
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* Dumps statistics.
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*/
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void ReportStatistics();
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/**
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* Setters.
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*/
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inline void SetMaxSteps(unsigned int valMax) { fMaxSteps = valMax; }
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inline void SetWarnSteps(unsigned int valWarn) { fWarnSteps = valWarn; }
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private:
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void ReportFieldValue( const G4FieldTrack& locationPV,
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const char* nameLoc,
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const G4EquationOfMotion* equation );
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// Invariants -- parameters
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// ====================================
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static const G4int max_depth = 10;
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unsigned int fMaxSteps = 10000; // Effort abandoned; signal is looping
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unsigned int fWarnSteps = 1000; // Warn about many steps (but succeeded)
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// State - varies during simulation
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// ====================================
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G4FieldTrack* ptrInterMedFT[max_depth+1]; // Used to store intermediate
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// tracks values in case of too
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// slow progress
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// Counters for statistics & debugging
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// ====================================
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unsigned long int fNumCalls = 0;
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unsigned long int fNumAdvanceFull = 0,
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fNumAdvanceGood = 0,
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fNumAdvanceTrials = 0;
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};
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#endif
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