Gabriele Cosmo
108 lines
4.1 KiB
C++
108 lines
4.1 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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// G4EnclosingCylinder
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//
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// Class description:
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//
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// A utility class for quickly deciding if a point is clearly outside a
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// polyhedra or polycone or deciding if a trajectory is clearly going to
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// miss those shapes.
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// Author: David C. Williams (UCSC), 1998 - Created
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// --------------------------------------------------------------------
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#ifndef G4ENCLOSINGCYLINDER_HH
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#define G4ENCLOSINGCYLINDER_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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class G4ReduciblePolygon;
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/**
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* @brief G4EnclosingCylinder is a utility class defining an envelope for
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* quickly deciding if a point is clearly outside a polyhedra or polycone or
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* deciding if a trajectory is clearly going to miss those shapes.
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*/
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class G4EnclosingCylinder
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{
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public:
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/**
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* Constructs the envelope, given its parameters.
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* @param[in] rz Pointer to the polygon structure.
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* @param[in] phiIsOpen Boolean flag to indicate if it is a section in Phi.
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* @param[in] startPhi Starting Phi angle.
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* @param[in] totalPhi Total Phi angle of the section.
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*/
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G4EnclosingCylinder( const G4ReduciblePolygon* rz,
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G4bool phiIsOpen,
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G4double startPhi, G4double totalPhi );
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/**
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* Default Destructor.
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*/
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~G4EnclosingCylinder() = default;
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/**
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* Decides very rapidly if the point 'p' is outside the cylinder.
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* @returns If not certain to be outside, return false.
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*/
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G4bool MustBeOutside( const G4ThreeVector& p ) const;
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/**
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* Decides very rapidly if the trajectory is going to miss the cylinder.
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* @returns If not certain to miss, return false.
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*/
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G4bool ShouldMiss( const G4ThreeVector& p, const G4ThreeVector& v ) const;
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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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G4EnclosingCylinder(__void__&);
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private:
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G4double radius; // radius of our cylinder
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G4double zLo, zHi; // z extent
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G4bool phiIsOpen; // true if there is a phi segment
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G4double startPhi, // for isPhiOpen==true, starting of phi segment
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totalPhi; // for isPhiOpen==true, size of phi segment
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G4double rx1=0.0, ry1=0.0,
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dx1=0.0, dy1=0.0;
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G4double rx2=0.0, ry2=0.0,
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dx2=0.0, dy2=0.0;
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G4bool concave; // true, if x/y cross section is concave
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};
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#endif
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