| 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: G4VSolid.hh,v 1.29 2008/09/10 13:18:42 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 | // class G4VSolid
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| 32 | //
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| 33 | // Class description:
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| 34 | //
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| 35 | // Abstract base class for solids, physical shapes that can be tracked through.
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| 36 | // Each solid has a name, and the constructors and destructors automatically
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| 37 | // add and subtract them from the G4SolidStore, a singleton `master' List
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| 38 | // of available solids.
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| 39 | //
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| 40 | // This class defines, but does not implement, functions to compute
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| 41 | // distances to/from the shape. Functions are also defined
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| 42 | // to check whether a point is inside the shape, to return the
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| 43 | // surface normal of the shape at a given point, and to compute
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| 44 | // the extent of the shape. [see descriptions below]
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| 45 | //
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| 46 | // Some protected/private utility functions are implemented for the
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| 47 | // clipping of regions for the computation of a solid's extent. Note that
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| 48 | // the clipping mechanism is presently inefficient.
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| 49 | //
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| 50 | // Some visualization/graphics functions are also defined.
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| 51 | //
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| 52 | // Member Data:
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| 53 | //
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| 54 | // G4String fshapeName
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| 55 | // - Name for this solid.
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| 56 |
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| 57 | // History:
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| 58 | // 12.04.00 J.Allison Implemented GetExtent() in terms of CalculateExtent()
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| 59 | // 17.06.98 J.Apostolakis Added pure virtual function GetEntityType()
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| 60 | // 26.07.96 P.Kent Added ComputeDimensions for replication mechanism
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| 61 | // 27.03.96 J.Allison Methods for visualisation
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| 62 | // 30.06.95 P.Kent Initial version, no scoping or visualisation functions
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| 63 | // --------------------------------------------------------------------
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| 64 | #ifndef G4VSOLID_HH
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| 65 | #define G4VSOLID_HH
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| 66 |
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| 67 | #include "G4Types.hh"
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| 68 | #include "G4String.hh"
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| 69 | #include "geomdefs.hh"
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| 70 |
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| 71 | class G4AffineTransform;
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| 72 | class G4VoxelLimits;
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| 73 |
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| 74 | class G4VPVParameterisation;
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| 75 | class G4VPhysicalVolume;
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| 76 |
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| 77 | class G4VGraphicsScene;
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| 78 | class G4Polyhedron;
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| 79 | class G4NURBS;
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| 80 | class G4VisExtent;
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| 81 | class G4DisplacedSolid;
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| 82 |
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| 83 | #include "G4ThreeVector.hh"
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| 84 | #include <vector>
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| 85 |
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| 86 | typedef std::vector<G4ThreeVector> G4ThreeVectorList;
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| 87 | typedef G4String G4GeometryType;
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| 88 |
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| 89 | class G4VSolid
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| 90 | {
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| 91 | public: // with description
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| 92 |
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| 93 | G4VSolid(const G4String& name);
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| 94 | // Creates a new shape, with the supplied name. No provision is made
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| 95 | // for sharing a common name amongst multiple classes.
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| 96 | virtual ~G4VSolid();
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| 97 | // Default destructor.
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| 98 |
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| 99 | inline G4bool operator==( const G4VSolid& s ) const;
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| 100 | // Return true only if addresses are the same.
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| 101 |
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| 102 | friend std::ostream& operator<< ( std::ostream& os, const G4VSolid& e );
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| 103 | // Streaming operator, using DumpInfo().
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| 104 |
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| 105 | inline G4String GetName() const;
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| 106 | // Returns the current shape's name.
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| 107 | inline void SetName(const G4String& name);
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| 108 | // Sets the current shape's name.
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| 109 |
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| 110 | inline G4double GetTolerance() const;
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| 111 | // Returns the cached geometrical tolerance.
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| 112 |
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| 113 | virtual G4bool CalculateExtent(const EAxis pAxis,
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| 114 | const G4VoxelLimits& pVoxelLimit,
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| 115 | const G4AffineTransform& pTransform,
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| 116 | G4double& pMin, G4double& pMax) const = 0;
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| 117 | // Calculate the minimum and maximum extent of the solid, when under the
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| 118 | // specified transform, and within the specified limits. If the solid
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| 119 | // is not intersected by the region, return false, else return true.
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| 120 |
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| 121 | virtual EInside Inside(const G4ThreeVector& p) const = 0;
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| 122 | // Returns kOutside if the point at offset p is outside the shapes
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| 123 | // boundaries plus Tolerance/2, kSurface if the point is <= Tolerance/2
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| 124 | // from a surface, otherwise kInside.
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| 125 |
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| 126 | virtual G4ThreeVector SurfaceNormal(const G4ThreeVector& p) const = 0;
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| 127 | // Returns the outwards pointing unit normal of the shape for the
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| 128 | // surface closest to the point at offset p.
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| 129 |
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| 130 | virtual G4double DistanceToIn(const G4ThreeVector& p,
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| 131 | const G4ThreeVector& v) const = 0;
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| 132 | // Return the distance along the normalised vector v to the shape,
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| 133 | // from the point at offset p. If there is no intersection, return
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| 134 | // kInfinity. The first intersection resulting from `leaving' a
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| 135 | // surface/volume is discarded. Hence, it is tolerant of points on
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| 136 | // the surface of the shape.
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| 137 |
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| 138 | virtual G4double DistanceToIn(const G4ThreeVector& p) const = 0;
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| 139 | // Calculate the distance to the nearest surface of a shape from an
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| 140 | // outside point. The distance can be an underestimate.
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| 141 |
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| 142 | virtual G4double DistanceToOut(const G4ThreeVector& p,
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| 143 | const G4ThreeVector& v,
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| 144 | const G4bool calcNorm=false,
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| 145 | G4bool *validNorm=0,
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| 146 | G4ThreeVector *n=0) const = 0;
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| 147 | // Return the distance along the normalised vector v to the shape,
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| 148 | // from a point at an offset p inside or on the surface of the shape.
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| 149 | // Intersections with surfaces, when the point is < Tolerance/2 from a
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| 150 | // surface must be ignored.
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| 151 | // If calcNorm==true:
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| 152 | // validNorm set true if the solid lies entirely behind or on the
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| 153 | // exiting surface.
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| 154 | // n set to exiting outwards normal vector (undefined Magnitude).
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| 155 | // validNorm set to false if the solid does not lie entirely behind
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| 156 | // or on the exiting surface
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| 157 | // If calcNorm==false:
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| 158 | // validNorm and n are unused.
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| 159 | //
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| 160 | // Must be called as solid.DistanceToOut(p,v) or by specifying all
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| 161 | // the parameters.
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| 162 |
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| 163 | virtual G4double DistanceToOut(const G4ThreeVector& p) const = 0;
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| 164 | // Calculate the distance to the nearest surface of a shape from an
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| 165 | // inside point. The distance can be an underestimate.
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| 166 |
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| 167 |
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| 168 | virtual void ComputeDimensions(G4VPVParameterisation* p,
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| 169 | const G4int n,
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| 170 | const G4VPhysicalVolume* pRep);
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| 171 | // Throw exception if ComputeDimensions called frrom an illegal
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| 172 | // derived class.
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| 173 |
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| 174 | virtual G4double GetCubicVolume();
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| 175 | // Returns an estimation of the solid volume in internal units.
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| 176 | // This method may be overloaded by derived classes to compute the
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| 177 | // exact geometrical quantity for solids where this is possible,
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| 178 | // or anyway to cache the computed value.
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| 179 | // Note: the computed value is NOT cached.
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| 180 |
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| 181 | virtual G4double GetSurfaceArea();
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| 182 | // Return an estimation of the solid surface area in internal units.
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| 183 | // This method may be overloaded by derived classes to compute the
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| 184 | // exact geometrical quantity for solids where this is possible,
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| 185 | // or anyway to cache the computed value.
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| 186 | // Note: the computed value is NOT cached.
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| 187 |
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| 188 | virtual G4GeometryType GetEntityType() const = 0;
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| 189 | // Provide identification of the class of an object.
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| 190 | // (required for persistency and STEP interface)
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| 191 |
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| 192 | virtual G4ThreeVector GetPointOnSurface() const;
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| 193 | // Returns a random point located on the surface of the solid.
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| 194 |
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| 195 | virtual std::ostream& StreamInfo(std::ostream& os) const = 0;
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| 196 | // Dumps contents of the solid to a stream.
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| 197 | inline void DumpInfo() const;
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| 198 | // Dumps contents of the solid to the standard output.
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| 199 |
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| 200 | // Visualization functions
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| 201 |
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| 202 | virtual void DescribeYourselfTo (G4VGraphicsScene& scene) const = 0;
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| 203 | // A "double dispatch" function which identifies the solid
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| 204 | // to the graphics scene.
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| 205 | virtual G4VisExtent GetExtent () const;
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| 206 | // Provide extent (bounding box) as possible hint to the graphics view.
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| 207 | virtual G4Polyhedron* CreatePolyhedron () const;
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| 208 | virtual G4NURBS* CreateNURBS () const;
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| 209 | // Create a G4Polyhedron/G4NURBS/... (It is the caller's responsibility
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| 210 | // to delete it). A null pointer means "not created".
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| 211 | virtual G4Polyhedron* GetPolyhedron () const;
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| 212 | // Smart access function - creates on request and stores for future
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| 213 | // access. A null pointer means "not available".
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| 214 |
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| 215 | virtual const G4VSolid* GetConstituentSolid(G4int no) const;
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| 216 | virtual G4VSolid* GetConstituentSolid(G4int no);
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| 217 | // If the solid is made up from a Boolean operation of two solids,
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| 218 | // return the "no" solid. If the solid is not a "Boolean", return 0.
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| 219 |
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| 220 | virtual const G4DisplacedSolid* GetDisplacedSolidPtr() const;
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| 221 | virtual G4DisplacedSolid* GetDisplacedSolidPtr();
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| 222 | // If the solid is a "G4DisplacedSolid", return a self pointer
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| 223 | // else return 0.
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| 224 |
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| 225 | public: // without description
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| 226 |
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| 227 | G4VSolid(__void__&);
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| 228 | // Fake default constructor for usage restricted to direct object
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| 229 | // persistency for clients requiring preallocation of memory for
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| 230 | // persistifiable objects.
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| 231 |
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| 232 | G4VSolid(const G4VSolid& rhs);
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| 233 | G4VSolid& operator=(const G4VSolid& rhs);
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| 234 | // Copy constructor and assignment operator.
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| 235 |
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| 236 | protected: // with description
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| 237 |
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| 238 | void CalculateClippedPolygonExtent(G4ThreeVectorList& pPolygon,
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| 239 | const G4VoxelLimits& pVoxelLimit,
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| 240 | const EAxis pAxis,
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| 241 | G4double& pMin, G4double& pMax) const;
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| 242 | // Calculate the maximum and minimum extents of the convex polygon
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| 243 | // pPolygon along the axis pAxis, within the limits pVoxelLimit.
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| 244 | //
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| 245 | // If the minimum is <pMin pMin is set to the new minimum.
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| 246 | // If the maximum is >pMax pMax is set to the new maximum.
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| 247 | //
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| 248 | // Modifications to pPolygon are made - it is left in an undefined state.
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| 249 |
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| 250 | void ClipCrossSection(G4ThreeVectorList* pVertices,
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| 251 | const G4int pSectionIndex,
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| 252 | const G4VoxelLimits& pVoxelLimit,
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| 253 | const EAxis pAxis,
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| 254 | G4double& pMin, G4double& pMax) const;
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| 255 | // Calculate the maximum and minimum extents of the polygon described
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| 256 | // by the vertices: pSectionIndex->pSectionIndex+1->
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| 257 | // pSectionIndex+2->pSectionIndex+3->pSectionIndex
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| 258 | // in the List pVertices.
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| 259 | //
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| 260 | // If the minimum is <pMin pMin is set to the new minimum.
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| 261 | // If the maximum is >pMax pMax is set to the new maximum.
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| 262 | //
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| 263 | // No modifications are made to pVertices.
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| 264 |
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| 265 | void ClipBetweenSections(G4ThreeVectorList* pVertices,
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| 266 | const G4int pSectionIndex,
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| 267 | const G4VoxelLimits& pVoxelLimit,
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| 268 | const EAxis pAxis,
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| 269 | G4double& pMin, G4double& pMax) const;
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| 270 | // Calculate the maximum and minimum extents of the polygons
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| 271 | // joining the CrossSections at pSectionIndex->pSectionIndex+3 and
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| 272 | // pSectionIndex+4->pSectionIndex7
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| 273 | // in the List pVertices, within the boundaries of the voxel limits
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| 274 | // pVoxelLimit.
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| 275 | //
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| 276 | // If the minimum is <pMin pMin is set to the new minimum.
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| 277 | // If the maximum is >pMax pMax is set to the new maximum.
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| 278 | //
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| 279 | // No modifications are made to pVertices.
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| 280 |
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| 281 | void ClipPolygon( G4ThreeVectorList& pPolygon,
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| 282 | const G4VoxelLimits& pVoxelLimit,
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| 283 | const EAxis pAxis ) const;
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| 284 | // Clip the specified convex polygon to the given limits, where
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| 285 | // the polygon is described by the vertices at (0),(1),...,(n),(0) in
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| 286 | // pPolygon.
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| 287 | // If the polygon is completely clipped away, the polygon is cleared.
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| 288 |
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| 289 |
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| 290 | G4double EstimateCubicVolume(G4int nStat, G4double epsilon) const;
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| 291 | // Calculate cubic volume based on Inside() method.
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| 292 | // Accuracy is limited by the second argument or the statistics
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| 293 | // expressed by the first argument.
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| 294 |
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| 295 | G4double EstimateSurfaceArea(G4int nStat, G4double ell) const;
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| 296 | // Calculate surface area only based on Inside() method.
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| 297 | // Accuracy is limited by the second argument or the statistics
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| 298 | // expressed by the first argument.
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| 299 |
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| 300 | protected:
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| 301 |
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| 302 | G4double kCarTolerance; // Cached geometrical tolerance
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| 303 |
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| 304 | private:
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| 305 |
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| 306 | void ClipPolygonToSimpleLimits(G4ThreeVectorList& pPolygon,
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| 307 | G4ThreeVectorList& outputPolygon,
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| 308 | const G4VoxelLimits& pVoxelLimit ) const;
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| 309 | // Clip the specified convex polygon to the given limits, storing the
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| 310 | // result in outputPolygon. The voxel limits must be limited in one
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| 311 | // *plane* only: This is achieved by having only x or y or z limits,
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| 312 | // and either the minimum or maximum limit set to -+kInfinity
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| 313 | // respectively.
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| 314 |
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| 315 | G4String fshapeName; // Name
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| 316 | };
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| 317 |
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| 318 | #include "G4VSolid.icc"
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| 319 |
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| 320 | #endif
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