00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // 00027 // $Id$ 00028 // 00029 // ---------------------------------------------------------------------- 00030 // Class G4Ellipse 00031 // 00032 // Class description: 00033 // 00034 // Definition of a generic ellipse curve. 00035 00036 // Authors: J.Sulkimo, P.Urban. 00037 // Revisions by: L.Broglia, G.Cosmo. 00038 // ---------------------------------------------------------------------- 00039 #ifndef __ELLIPTICCURVE_H 00040 #define __ELLIPTICCURVE_H 00041 00042 #include <CLHEP/Units/PhysicalConstants.h> 00043 00044 #include "G4CircularCurve.hh" 00045 00046 class G4Ellipse : public G4Conic 00047 { 00048 00049 public: // with description 00050 00051 G4Ellipse(); 00052 virtual ~G4Ellipse(); 00053 // Constructor & destructor. 00054 00055 G4Ellipse(const G4Ellipse& right); 00056 G4Ellipse& operator=(const G4Ellipse& right); 00057 // Copy constructor and assignment operator. 00058 00059 G4Curve* Project(const G4Transform3D& tr= G4Transform3D::Identity); 00060 // Transforms and projects the curve. 00061 00062 G4bool Tangent(G4CurvePoint& cp, G4Vector3D& v); 00063 // Returns tangent to curve at a given point, if existing. 00064 // The tangent is computed from the 3D point representation. 00065 00066 inline G4double GetPMax() const; 00067 inline G4Point3D GetPoint(G4double param) const; 00068 inline G4double GetPPoint(const G4Point3D& p) const; 00069 // Accessors methods. 00070 00071 inline G4double GetSemiAxis1() const; 00072 inline G4double GetSemiAxis2() const; 00073 inline void Init(const G4Axis2Placement3D& position0, 00074 G4double semiAxis10, G4double semiAxis20); 00075 // Get/Set methods for the geometric data. 00076 00077 00078 public: 00079 00080 inline G4int IntersectRay2D(const G4Ray& ray); 00081 // void IntersectRay2D(const G4Ray& ray, G4CurveRayIntersection& is); 00082 00083 protected: 00084 00085 void InitBounded(); 00086 00087 private: 00088 00089 // geometric data 00090 00091 G4double semiAxis1; 00092 G4double semiAxis2; 00093 G4double ratioAxis2Axis1; 00094 00095 G4Transform3D toUnitCircle; 00096 00097 G4double forTangent; // -R_1^2/R_2^2 00098 }; 00099 00100 #include "G4Ellipse.icc" 00101 00102 #endif