Gabriele Cosmo
114 lines
4.0 KiB
C++
114 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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// G4IntersectingCone
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//
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// Class description:
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//
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// Utility class which calculates the intersection
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// of an arbitrary line with a fixed cone.
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// Author: David C. Williams (UCSC), 1998 - Created
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// --------------------------------------------------------------------
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#ifndef G4INTERSECTINGCONE_HH
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#define G4INTERSECTINGCONE_HH
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#include "G4Types.hh"
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#include "geomdefs.hh"
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#include "G4ThreeVector.hh"
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/**
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* @brief G4IntersectingCone is a utility class used to calculate the
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* intersection of an arbitrary line with a fixed cone.
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*/
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class G4IntersectingCone
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{
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public:
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/**
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* Constructor given r,z values.
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* @param[in] r r values.
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* @param[in] z Z values.
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*/
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G4IntersectingCone( const G4double r[2], const G4double z[2] );
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/**
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* Default Destructor.
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*/
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~G4IntersectingCone() = default;
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/**
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* Calculates the intersection of a line with the conical surface,
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* ignoring any Phi division.
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*/
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G4int LineHitsCone( const G4ThreeVector& p, const G4ThreeVector& v,
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G4double* s1, G4double* s2 );
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/**
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* Checks r or z extent, as appropriate, to see if the point is
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* possibly on the cone.
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*/
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G4bool HitOn( const G4double r, const G4double z );
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/**
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* Accessors for R and Z bounds of side.
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*/
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inline G4double RLo() const { return rLo; }
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inline G4double RHi() const { return rHi; }
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inline G4double ZLo() const { return zLo; }
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inline G4double ZHi() const { return zHi; }
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/**
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* Fake default constructor for usage restricted to direct object
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* persistency for clients requiring preallocation of memory for
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* persistifiable objects.
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*/
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G4IntersectingCone(__void__&);
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private:
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/**
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* Calculating the intersection of a line with the conical surface.
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* Internal methods used by LineHitsCone().
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*/
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G4int LineHitsCone1( const G4ThreeVector& p, const G4ThreeVector& v,
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G4double* s1, G4double* s2 );
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G4int LineHitsCone2( const G4ThreeVector& p, const G4ThreeVector& v,
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G4double* s1, G4double* s2 );
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private:
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/** Z, R bounds of side. */
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G4double zLo, zHi, rLo, rHi;
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/** True if cone is type 1. */
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G4bool type1 = false; // (std::fabs(z1-z2)>std::fabs(r1-r2))
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/** Cone radius parameters - type 1: r = A + B*z; type 2: z = A + B*r. */
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G4double A, B;
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};
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#endif
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