| 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: G4Torus.hh,v 1.27 2007/05/18 07:38:00 gcosmo 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 | // --------------------------------------------------------------------
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| 32 | // GEANT 4 class header file
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| 33 | //
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| 34 | // G4Torus
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| 35 | //
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| 36 | // Class description:
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| 37 | //
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| 38 | // A torus or torus segment with curved sides parallel to the z-axis.
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| 39 | // The torus has a specified swept radius about which it is centered,
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| 40 | // and a given minimum and maximum radius. A minimum radius of 0
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| 41 | // signifies a filled torus.
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| 42 | // The torus segment is specified by starting and delta angles for phi,
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| 43 | // with 0 being the +x axis, PI/2 the +y axis. A delta angle of 2PI
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| 44 | // signifies a complete, unsegmented torus/cylindr.
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| 45 | //
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| 46 | // Member functions:
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| 47 | //
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| 48 | // As inherited from G4CSGSolid+
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| 49 | //
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| 50 | // G4Torus(const G4String &pName
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| 51 | // G4double pRmin
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| 52 | // G4double pRmax
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| 53 | // G4double pRtor
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| 54 | // G4double pSPhi
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| 55 | // G4double pDPhi )
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| 56 | //
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| 57 | // - Construct a torus with the given name and dimensions.
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| 58 | // The angles are provided is radians. pRtor >= pRmax
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| 59 | //
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| 60 | //
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| 61 | // Protected:
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| 62 | //
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| 63 | // G4ThreeVectorList*
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| 64 | // CreateRotatedVertices(const G4AffineTransform& pTransform) const
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| 65 | //
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| 66 | // - Create the List of transformed vertices in the format required
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| 67 | // for G4VSolid:: ClipCrossSection and ClipBetweenSections.
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| 68 | //
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| 69 | // Member Data:
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| 70 | //
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| 71 | // fRmin Inside radius
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| 72 | // fRmax Outside radius
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| 73 | // fRtor swept radius of torus
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| 74 | //
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| 75 | // fSPhi The starting phi angle in radians,
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| 76 | // adjusted such that fSPhi+fDPhi<=2PI, fSPhi>-2PI
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| 77 | //
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| 78 | // fDPhi Delta angle of the segment in radians
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| 79 | //
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| 80 | // You could find very often in G4Torus functions values like 'pt' or
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| 81 | // 'it'. These are the distances from p or i G4ThreeVector points in the
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| 82 | // plane (Z axis points p or i) to fRtor point in XY plane. This value is
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| 83 | // similar to rho for G4Tubs and is used for definiton of the point
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| 84 | // relative to fRmin and fRmax, i.e. for solution of inside/outside
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| 85 | // problems
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| 86 |
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| 87 | // History:
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| 88 | // 30.10.96 V.Grichine: first version of G4Torus
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| 89 | // 21.04.98 J.Apostolakis: added SetAllParameters() function
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| 90 | // 26.05.00 V.Grichine: added new SolveBiQuadratic/Cubic() developed
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| 91 | // by O.Cremonesi
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| 92 | // 31.08.00 E.Medernach: added SolveNumeric functions, migrated to
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| 93 | // numeric solutions
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| 94 | // --------------------------------------------------------------------
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| 95 |
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| 96 | #ifndef G4Torus_HH
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| 97 | #define G4Torus_HH
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| 98 |
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| 99 | #include "G4CSGSolid.hh"
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| 100 |
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| 101 | class G4Torus : public G4CSGSolid
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| 102 | {
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| 103 |
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| 104 | public: // with description
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| 105 |
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| 106 | G4Torus(const G4String &pName,
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| 107 | G4double pRmin,
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| 108 | G4double pRmax,
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| 109 | G4double pRtor,
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| 110 | G4double pSPhi,
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| 111 | G4double pDPhi);
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| 112 |
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| 113 | virtual ~G4Torus();
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| 114 |
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| 115 | // Accessors
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| 116 |
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| 117 | inline G4double GetRmin() const;
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| 118 | inline G4double GetRmax() const;
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| 119 | inline G4double GetRtor() const;
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| 120 | inline G4double GetSPhi() const;
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| 121 | inline G4double GetDPhi() const;
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| 122 |
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| 123 | // Methods of solid
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| 124 |
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| 125 | inline G4double GetCubicVolume();
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| 126 | inline G4double GetSurfaceArea();
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| 127 |
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| 128 | EInside Inside(const G4ThreeVector& p) const;
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| 129 | G4bool CalculateExtent(const EAxis pAxis,
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| 130 | const G4VoxelLimits& pVoxelLimit,
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| 131 | const G4AffineTransform& pTransform,
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| 132 | G4double& pmin, G4double& pmax) const;
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| 133 | void ComputeDimensions( G4VPVParameterisation* p,
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| 134 | const G4int n,
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| 135 | const G4VPhysicalVolume* pRep);
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| 136 | G4ThreeVector SurfaceNormal( const G4ThreeVector& p) const;
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| 137 | G4double DistanceToIn(const G4ThreeVector& p,const G4ThreeVector& v) const;
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| 138 | G4double DistanceToIn(const G4ThreeVector& p) const;
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| 139 | G4double DistanceToOut(const G4ThreeVector& p,const G4ThreeVector& v,
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| 140 | const G4bool calcNorm=G4bool(false),
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| 141 | G4bool *validNorm=0,G4ThreeVector *n=0) const;
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| 142 | G4double DistanceToOut(const G4ThreeVector& p) const;
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| 143 |
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| 144 | G4GeometryType GetEntityType() const;
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| 145 |
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| 146 | G4ThreeVector GetPointOnSurface() const;
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| 147 |
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| 148 | std::ostream& StreamInfo(std::ostream& os) const;
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| 149 |
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| 150 | // Visualisation functions
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| 151 |
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| 152 | void DescribeYourselfTo (G4VGraphicsScene& scene) const;
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| 153 | G4Polyhedron* CreatePolyhedron () const;
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| 154 | G4NURBS* CreateNURBS () const;
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| 155 |
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| 156 | public: // without description
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| 157 |
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| 158 | void SetAllParameters(G4double pRmin, G4double pRmax, G4double pRtor,
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| 159 | G4double pSPhi, G4double pDPhi);
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| 160 |
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| 161 | G4Torus(__void__&);
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| 162 | // Fake default constructor for usage restricted to direct object
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| 163 | // persistency for clients requiring preallocation of memory for
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| 164 | // persistifiable objects.
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| 165 |
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| 166 | protected:
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| 167 |
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| 168 | std::vector<G4double> TorusRootsJT(const G4ThreeVector& p,
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| 169 | const G4ThreeVector& v,
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| 170 | G4double r) const ;
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| 171 |
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| 172 | G4double SolveNumericJT(const G4ThreeVector& p,
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| 173 | const G4ThreeVector& v,
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| 174 | G4double r,
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| 175 | G4bool IsDistanceToIn) const;
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| 176 |
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| 177 | G4ThreeVectorList*
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| 178 | CreateRotatedVertices(const G4AffineTransform& pTransform,
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| 179 | G4int& noPolygonVertices) const;
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| 180 |
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| 181 | protected:
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| 182 |
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| 183 | G4double fRmin,fRmax,fRtor,fSPhi,fDPhi;
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| 184 |
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| 185 | // Used by distanceToOut
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| 186 | enum ESide {kNull,kRMin,kRMax,kSPhi,kEPhi};
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| 187 |
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| 188 | // used by normal
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| 189 | enum ENorm {kNRMin,kNRMax,kNSPhi,kNEPhi};
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| 190 |
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| 191 | private:
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| 192 |
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| 193 | G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p) const;
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| 194 | // Algorithm for SurfaceNormal() following the original
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| 195 | // specification for points not on the surface
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| 196 |
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| 197 | private:
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| 198 |
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| 199 | G4double kRadTolerance, kAngTolerance;
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| 200 | // Radial and angular tolerances
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| 201 | };
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| 202 |
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| 203 | #include "G4Torus.icc"
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| 204 |
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| 205 | #endif
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