Gabriele Cosmo
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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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 statement,
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// and all its terms.
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//
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// $Id: G4EnclosingCylinder.hh,v 1.3 2000/11/02 16:54:48 gcosmo Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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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 "globals.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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