| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: G4ToroidalSurface.hh,v 1.7 2006/06/29 18:41:01 gunter Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-03 $
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| 29 | //
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| 30 | // ----------------------------------------------------------------------
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| 31 | // Class G4ToroidalSurface
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| 32 | //
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| 33 | // Class Description:
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| 34 | //
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| 35 | // Definition of a toroidal surface.
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| 36 |
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| 37 | // Authors: J.Sulkimo, P.Urban.
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| 38 | // Revisions by: L.Broglia, G.Cosmo.
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| 39 | // ----------------------------------------------------------------------
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| 40 |
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| 41 | #ifndef __G4TOROIDALSURAFCE
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| 42 | #define __G4TOROIDALSURAFCE
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| 43 |
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| 44 | #include "G4FPlane.hh"
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| 45 | #include "G4OsloMatrix.hh"
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| 46 |
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| 47 | class G4ToroidalSurface : public G4Surface
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| 48 | {
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| 49 |
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| 50 | public: // with description
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| 51 |
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| 52 | G4ToroidalSurface();
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| 53 | G4ToroidalSurface(const G4Vector3D&,
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| 54 | const G4Vector3D&,
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| 55 | const G4Vector3D&,
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| 56 | G4double,
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| 57 | G4double);
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| 58 | virtual ~G4ToroidalSurface();
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| 59 | // Constructors & destructor.
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| 60 |
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| 61 | inline G4String GetEntityType() const;
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| 62 | // Returns type identifier of the shape.
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| 63 |
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| 64 | G4int Intersect(const G4Ray&);
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| 65 | // Determines the intersection of a ray with a torus.
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| 66 | // Returns 1 if the ray intersects the torus.
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| 67 |
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| 68 | void CalcBBox();
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| 69 | // Computes the bounding-box.
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| 70 |
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| 71 | inline G4Vector3D GetDirection() const;
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| 72 | inline G4Vector3D GetAxis() const;
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| 73 | inline G4Point3D GetLocation() const;
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| 74 | inline G4double GetMinRadius() const;
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| 75 | inline G4double GetMaxRadius() const;
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| 76 | // Accessors to geometrical data.
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| 77 |
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| 78 | G4double ClosestDistanceToPoint(const G4Point3D& x);
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| 79 | // Returns the closest distance to the torus surface from a point x.
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| 80 |
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| 81 | virtual G4Vector3D SurfaceNormal(const G4Point3D& Pt) const;
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| 82 | // Returns the Normal unit vector to the G4ToroidalSurface at a point Pt
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| 83 | // on (or nearly on) the G4ToroidalSurface.
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| 84 |
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| 85 | inline void MultiplyPointByMatrix(G4Point3D& Base);
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| 86 | inline void MultiplyVectorByMatrix(G4Vector3D& DCos);
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| 87 | // Utility methods.
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| 88 |
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| 89 | private:
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| 90 |
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| 91 | G4ToroidalSurface(const G4ToroidalSurface&);
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| 92 | G4ToroidalSurface& operator=(const G4ToroidalSurface&);
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| 93 | // Private copy constructor and assignment operator.
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| 94 |
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| 95 | inline G4int IsZero(G4double x) const;
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| 96 | G4int SolveQuartic(G4double c[], G4double s[]);
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| 97 | G4int SolveCubic (G4double c[], G4double s[]);
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| 98 | G4int SolveQuadric(G4double c[], G4double s[]);
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| 99 | // Algorithms for solving quadratic, cubic and quartic equations.
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| 100 |
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| 101 | private:
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| 102 |
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| 103 | G4Axis2Placement3D Placement;
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| 104 | G4double MinRadius;
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| 105 | G4double MaxRadius;
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| 106 | G4PointMatrix* TransMatrix; // transformation matrix
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| 107 | G4Point3D hitpoint;
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| 108 | const G4double EQN_EPS;
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| 109 |
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| 110 | };
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| 111 |
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| 112 | #include "G4ToroidalSurface.icc"
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| 113 |
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| 114 | #endif
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