Gabriele Cosmo
87 lines
3.2 KiB
C++
87 lines
3.2 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4EnclosingCylinder.hh,v 1.6 2003/11/03 18:39:54 gcosmo Exp $
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// GEANT4 tag $Name: geant4-06-00-patch-01 $
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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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// G4EnclosingCylinder
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//
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// Class description:
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//
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// Definition of a utility class for quickly deciding if a point
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// is clearly outside a polyhedra or polycone or deciding if
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// a trajectory is clearly going to miss those shapes.
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// Author:
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// David C. Williams (davidw@scipp.ucsc.edu)
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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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class G4EnclosingCylinder
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{
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public: // with description
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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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~G4EnclosingCylinder();
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G4bool MustBeOutside( const G4ThreeVector &p ) const;
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// Decide very rapidly if the point is outside the cylinder.
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// If one is not certain, return false.
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G4bool ShouldMiss( const G4ThreeVector &p, const G4ThreeVector &v ) const;
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// Decide very rapidly if the trajectory is going to miss the cylinder.
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// If one is not sure, return false.
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protected:
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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, ry1,
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dx1, dy1;
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G4double rx2, ry2,
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dx2, dy2;
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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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