[831] | 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: G4ConicalSurface.hh,v 1.10 2006/06/29 18:38:44 gunter Exp $ |
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[1228] | 28 | // GEANT4 tag $Name: geant4-09-03 $ |
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[831] | 29 | // |
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| 30 | // ---------------------------------------------------------------------- |
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| 31 | // Class G4ConicalSurface |
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| 32 | // |
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| 33 | // Class Description: |
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| 34 | // |
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| 35 | // A G4ConicalSurface is a semi-infinite conical surface defined by |
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| 36 | // an axis and an opening angle, defined as the angle between the axis |
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| 37 | // and the conical surface, with the origin being the apex of the cone. |
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| 38 | |
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| 39 | // The code for G4ConicalSurface has been derived from the original |
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| 40 | // implementation in the "Gismo" package. |
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| 41 | // |
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| 42 | // Author: A.Breakstone |
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| 43 | // Adaptation: J.Sulkimo, P.Urban. |
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| 44 | // Revisions by: L.Broglia, G.Cosmo. |
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| 45 | // ---------------------------------------------------------------------- |
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| 46 | #ifndef __G4CONICALSURFACE_H |
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| 47 | #define __G4CONICALSURFACE_H |
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| 48 | |
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| 49 | #include "G4Surface.hh" |
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| 50 | |
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| 51 | |
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| 52 | class G4ConicalSurface : public G4Surface |
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| 53 | { |
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| 54 | |
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| 55 | public: // with description |
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| 56 | |
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| 57 | G4ConicalSurface(); |
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| 58 | // Default constructor: |
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| 59 | // default axis is ( 1.0, 0.0, 0.0 ), |
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| 60 | // default angle is 1.0 radians. |
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| 61 | |
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| 62 | G4ConicalSurface( const G4Point3D& o, const G4Vector3D& a, G4double e ); |
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| 63 | // Normal constructor: |
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| 64 | // first argument is the origin of the G4ConicalSurface |
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| 65 | // second argument is the axis of the G4ConicalSurface |
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| 66 | // third argument is the angle of the G4ConicalSurface. |
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| 67 | |
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| 68 | virtual ~G4ConicalSurface(); |
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| 69 | // Virtual destructor. |
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| 70 | |
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| 71 | inline G4int operator==( const G4ConicalSurface& c ); |
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| 72 | // Equality operator. |
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| 73 | |
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| 74 | inline G4String GetEntityType() const; |
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| 75 | // Returns type identifier of the shape. |
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| 76 | |
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| 77 | virtual const char* NameOf() const; |
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| 78 | // Returns the class name. |
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| 79 | |
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| 80 | virtual void PrintOn( std::ostream& os = G4cout ) const; |
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| 81 | // Printing function, streaming surface's attributes. |
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| 82 | |
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| 83 | virtual G4double HowNear( const G4Vector3D& x ) const; |
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| 84 | // Returns the distance from a point to a semi-infinite G4ConicalSurface. |
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| 85 | // The point x is the (input) argument. |
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| 86 | // The distance is positive if the point is Inside, negative if it |
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| 87 | // is outside |
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| 88 | |
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| 89 | void CalcBBox(); |
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| 90 | // Computes the bounding-box. |
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| 91 | |
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| 92 | G4int Intersect( const G4Ray& ry ); |
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| 93 | // Returns the distance along a Ray (straight line with G4Vector3D) to |
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| 94 | // leave or enter a G4ConicalSurface. |
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| 95 | // If the G4Vector3D of the Ray is opposite to that of the Normal to |
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| 96 | // the G4ConicalSurface at the intersection point, it will not leave the |
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| 97 | // G4ConicalSurface. |
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| 98 | // Similarly, if the G4Vector3D of the Ray is along that of the Normal |
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| 99 | // to the G4ConicalSurface at the intersection point, it will not enter the |
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| 100 | // G4ConicalSurface. |
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| 101 | // This method is called by all finite shapes sub-classed to |
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| 102 | // G4ConicalSurface. |
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| 103 | // A negative result means no intersection. |
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| 104 | // If no valid intersection point is found, set the distance |
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| 105 | // and intersection point to large numbers. |
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| 106 | |
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| 107 | virtual G4Vector3D SurfaceNormal( const G4Point3D& p ) const; |
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| 108 | // Returns the Normal unit vector to the G4ConicalSurface at a point p |
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| 109 | // on (or nearly on) the G4ConicalSurface. |
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| 110 | |
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| 111 | virtual G4int Inside( const G4Vector3D& x ) const; |
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| 112 | // Returns 1 if the point x is Inside the G4ConicalSurface, 0 otherwise. |
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| 113 | // Outside means that the distance to the G4ConicalSurface would be |
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| 114 | // negative. Uses the HowNear() function to calculate this distance. |
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| 115 | |
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| 116 | virtual G4int WithinBoundary( const G4Vector3D& x ) const; |
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| 117 | // Returns 1 if point x is on the G4ConicalSurface, otherwise return zero |
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| 118 | // Since a G4ConicalSurface is infinite in extent, the function |
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| 119 | // will just check if the point is on the G4ConicalSurface (to the surface |
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| 120 | // precision). |
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| 121 | |
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| 122 | virtual G4double Scale() const; |
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| 123 | // Function overwritten by finite-sized derived classes which returns |
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| 124 | // a radius, unless it is zero, in which case it returns the smallest |
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| 125 | // non-zero dimension. |
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| 126 | // Since a semi-infinite cone has no Scale associated with it, it returns |
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| 127 | // the arbitrary number 1.0. |
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| 128 | // Used for Scale-invariant tests of surface thickness. |
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| 129 | |
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| 130 | inline G4Vector3D GetAxis() const; |
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| 131 | inline G4double GetAngle() const; |
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| 132 | // Return the axis and angle of the G4ConicalSurface. |
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| 133 | |
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| 134 | void SetAngle( G4double e ); |
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| 135 | // Changes the angle of the G4ConicalSurface. |
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| 136 | // Requires angle to range from 0 to PI/2. |
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| 137 | |
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| 138 | public: // without description |
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| 139 | |
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| 140 | /* |
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| 141 | virtual G4double distanceAlongRay( G4int which_way, const G4Ray* ry, |
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| 142 | G4Vector3D& p ) const; |
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| 143 | // Returns the distance along a Ray to enter or leave a G4ConicalSurface. |
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| 144 | // The first (input) argument is +1 to leave or -1 to enter |
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| 145 | // The second (input) argument is a pointer to the Ray |
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| 146 | // The third (output) argument returns the intersection point. |
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| 147 | |
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| 148 | virtual G4double distanceAlongHelix( G4int which_way, const Helix* hx, |
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| 149 | G4Vector3D& p ) const; |
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| 150 | // Returns the distance along a Helix to enter or leave a G4ConicalSurface. |
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| 151 | // The first (input) argument is +1 to leave or -1 to enter |
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| 152 | // The second (input) argument is a pointer to the Helix |
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| 153 | // The third (output) argument returns the intersection point. |
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| 154 | |
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| 155 | G4Vector3D Normal( const G4Vector3D& p ) const; |
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| 156 | // Returns the Normal unit vector to a G4ConicalSurface |
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| 157 | // at a point p on (or nearly on) the G4ConicalSurface. |
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| 158 | |
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| 159 | virtual void rotate( G4double alpha, G4double beta, |
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| 160 | G4double gamma, G4ThreeMat& m, G4int inverse ); |
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| 161 | // Rotates the G4ConicalSurface (angles are assumed to be given in |
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| 162 | // radians), arguments: |
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| 163 | // - first about global x-axis by angle alpha, |
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| 164 | // - second about global y-axis by angle beta, |
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| 165 | // - third about global z-axis by angle gamma, |
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| 166 | // - fourth (output) argument gives the calculated rotation matrix, |
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| 167 | // - fifth (input) argument is an integer flag which if |
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| 168 | // non-zero reverses the order of the rotations. |
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| 169 | |
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| 170 | virtual void rotate( G4double alpha, G4double beta, |
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| 171 | G4double gamma, G4int inverse ); |
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| 172 | // Rotates the G4ConicalSurface (angles are assumed to be given in |
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| 173 | // radians), arguments: |
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| 174 | // - first about global x-axis by angle alpha, |
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| 175 | // - second about global y-axis by angle beta, |
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| 176 | // - third about global z-axis by angle gamma, |
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| 177 | // - fourth (input) argument is an integer flag which if |
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| 178 | // non-zero reverses the order of the rotations. |
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| 179 | |
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| 180 | private: |
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| 181 | |
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| 182 | virtual G4double gropeAlongHelix( const Helix* hx ) const; |
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| 183 | // Private function to use a crude technique to find the intersection |
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| 184 | // of a Helix with a G4ConicalSurface. It returns the turning angle |
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| 185 | // along the Helix at which the intersection occurs or -1.0 if no |
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| 186 | // intersection point is found. |
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| 187 | // The argument to the call is the pointer to the Helix. |
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| 188 | */ |
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| 189 | |
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| 190 | private: |
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| 191 | |
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| 192 | G4ConicalSurface(const G4ConicalSurface&); |
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| 193 | G4ConicalSurface& operator=(const G4ConicalSurface&); |
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| 194 | // Private copy constructor and assignment operator. |
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| 195 | |
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| 196 | private: |
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| 197 | |
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| 198 | G4Vector3D axis; |
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| 199 | // Direction of axis of G4ConicalSurface (unit vector). |
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| 200 | |
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| 201 | G4double angle; |
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| 202 | // Half opening angle of G4ConicalSurface, in radians |
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| 203 | // range is 0 < angle < PI/2. |
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| 204 | |
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| 205 | }; |
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| 206 | |
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| 207 | #include "G4ConicalSurface.icc" |
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| 208 | |
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| 209 | #endif |
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