| 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: G4PolyPhiFace.hh,v 1.12 2008/05/15 11:41:58 gcosmo Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $
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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 | //
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| 35 | // G4PolyPhiFace
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| 36 | //
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| 37 | // Class description:
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| 38 | //
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| 39 | // Definition of a face that bounds a polycone or polyhedra when
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| 40 | // it has a phi opening:
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| 41 | //
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| 42 | // G4PolyPhiFace( const G4ReduciblePolygon *rz,
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| 43 | // G4double phi,
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| 44 | // G4double deltaPhi,
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| 45 | // G4double phiOther )
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| 46 | //
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| 47 | // Specifically: a face that lies on a plane that passes through
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| 48 | // the z axis. It has boundaries that are straight lines of arbitrary
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| 49 | // length and direction, but with corners aways on the same side of
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| 50 | // the z axis.
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| 51 |
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| 52 | // Author:
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| 53 | // David C. Williams (davidw@scipp.ucsc.edu)
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| 54 | // --------------------------------------------------------------------
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| 55 |
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| 56 | #ifndef G4PolyPhiFace_hh
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| 57 | #define G4PolyPhiFace_hh
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| 58 |
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| 59 | #include "G4VCSGface.hh"
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| 60 | #include "G4TwoVector.hh"
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| 61 |
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| 62 | class G4ReduciblePolygon;
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| 63 |
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| 64 | struct G4PolyPhiFaceVertex
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| 65 | {
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| 66 | G4double x, y, r, z; // position
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| 67 | G4double rNorm,
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| 68 | zNorm; // r/z normal
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| 69 | G4ThreeVector norm3D; // 3D normal
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| 70 |
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| 71 | // Needed for Triangulation Algorithm
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| 72 | //
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| 73 | G4bool ear;
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| 74 | G4PolyPhiFaceVertex *next,*prev;
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| 75 | };
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| 76 |
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| 77 | struct G4PolyPhiFaceEdge
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| 78 | {
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| 79 | G4PolyPhiFaceEdge(): v0(0), v1(0) {}
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| 80 | G4PolyPhiFaceVertex *v0, *v1; // Corners
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| 81 | G4double tr, tz, // Unit vector along edge
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| 82 | length; // Length of edge
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| 83 | G4ThreeVector norm3D; // 3D edge normal vector
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| 84 | };
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| 85 |
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| 86 | class G4PolyPhiFace : public G4VCSGface
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| 87 | {
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| 88 |
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| 89 | public: // with description
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| 90 |
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| 91 | G4PolyPhiFace( const G4ReduciblePolygon *rz,
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| 92 | G4double phi, G4double deltaPhi, G4double phiOther );
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| 93 | // Constructor.
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| 94 | // Points r,z should be supplied in clockwise order in r,z.
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| 95 | // For example:
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| 96 | // [1]---------[2] ^ R
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| 97 | // | | |
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| 98 | // | | +--> z
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| 99 | // [0]---------[3]
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| 100 |
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| 101 | virtual ~G4PolyPhiFace();
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| 102 | // Destructor. Removes edges and corners.
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| 103 |
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| 104 | G4PolyPhiFace( const G4PolyPhiFace &source );
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| 105 | G4PolyPhiFace& operator=( const G4PolyPhiFace &source );
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| 106 | // Copy constructor and assgnment operator.
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| 107 |
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| 108 | G4bool Intersect( const G4ThreeVector &p, const G4ThreeVector &v,
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| 109 | G4bool outgoing, G4double surfTolerance,
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| 110 | G4double &distance, G4double &distFromSurface,
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| 111 | G4ThreeVector &normal, G4bool &allBehind );
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| 112 |
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| 113 | G4double Distance( const G4ThreeVector &p, G4bool outgoing );
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| 114 |
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| 115 | EInside Inside( const G4ThreeVector &p, G4double tolerance,
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| 116 | G4double *bestDistance );
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| 117 |
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| 118 | G4ThreeVector Normal( const G4ThreeVector &p, G4double *bestDistance );
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| 119 |
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| 120 | G4double Extent( const G4ThreeVector axis );
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| 121 |
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| 122 | void CalculateExtent( const EAxis axis,
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| 123 | const G4VoxelLimits &voxelLimit,
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| 124 | const G4AffineTransform &tranform,
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| 125 | G4SolidExtentList &extentList );
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| 126 |
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| 127 | inline G4VCSGface *Clone();
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| 128 | // Allocates on the heap a clone of this face.
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| 129 |
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| 130 | G4double SurfaceArea();
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| 131 | G4double SurfaceTriangle( G4ThreeVector p1, G4ThreeVector p2,
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| 132 | G4ThreeVector p3, G4ThreeVector* p4);
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| 133 | G4ThreeVector GetPointOnFace();
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| 134 | // Auxiliary methods for determination of points on surface.
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| 135 |
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| 136 | public: // without description
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| 137 |
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| 138 | G4PolyPhiFace(__void__&);
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| 139 | // Fake default constructor for usage restricted to direct object
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| 140 | // persistency for clients requiring preallocation of memory for
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| 141 | // persistifiable objects.
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| 142 |
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| 143 | void Diagnose( G4VSolid *solid );
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| 144 | // Throw an exception if something is found inconsistent with
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| 145 | // the solid. For debugging purposes only
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| 146 |
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| 147 | protected:
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| 148 |
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| 149 | G4bool InsideEdgesExact( G4double r, G4double z, G4double normSign,
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| 150 | const G4ThreeVector &p, const G4ThreeVector &v );
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| 151 | // Decide if the point in r,z is inside the edges of our face,
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| 152 | // **but** do so consistently with other faces.
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| 153 |
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| 154 | G4bool InsideEdges( G4double r, G4double z );
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| 155 | G4bool InsideEdges( G4double r, G4double z, G4double *distRZ2,
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| 156 | G4PolyPhiFaceVertex **base3Dnorm=0,
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| 157 | G4ThreeVector **head3Dnorm=0 );
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| 158 | // Decide if the point in r,z is inside the edges of our face.
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| 159 |
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| 160 | inline G4double ExactZOrder( G4double z,
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| 161 | G4double qx, G4double qy, G4double qz,
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| 162 | const G4ThreeVector &v,
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| 163 | G4double normSign,
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| 164 | const G4PolyPhiFaceVertex *vert ) const;
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| 165 | // Decide precisely whether a trajectory passes to the left, right,
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| 166 | // or exactly passes through the z position of a vertex point in face.
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| 167 |
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| 168 | void CopyStuff( const G4PolyPhiFace &source );
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| 169 |
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| 170 | protected:
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| 171 |
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| 172 | // Functions used for Triangulation in Case of generic Polygone.
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| 173 | // The triangulation is used for GetPointOnFace()
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| 174 |
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| 175 | G4double Area2( G4TwoVector a, G4TwoVector b, G4TwoVector c);
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| 176 | // Calculation of 2*Area of Triangle with Sign
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| 177 |
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| 178 | G4bool Left( G4TwoVector a, G4TwoVector b, G4TwoVector c );
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| 179 | G4bool LeftOn( G4TwoVector a, G4TwoVector b, G4TwoVector c );
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| 180 | G4bool Collinear( G4TwoVector a, G4TwoVector b, G4TwoVector c );
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| 181 | // Boolean functions for sign of Surface
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| 182 |
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| 183 | G4bool IntersectProp( G4TwoVector a, G4TwoVector b,
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| 184 | G4TwoVector c, G4TwoVector d );
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| 185 | // Boolean function for finding proper intersection of two
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| 186 | // line segments (a,b) and (c,d).
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| 187 |
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| 188 | G4bool Between( G4TwoVector a, G4TwoVector b, G4TwoVector c );
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| 189 | // Boolean function for determining if point c is between a and b
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| 190 | // where the three points (a,b,c) are on the same line.
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| 191 |
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| 192 | G4bool Intersect( G4TwoVector a, G4TwoVector b,
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| 193 | G4TwoVector c, G4TwoVector d );
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| 194 | // Boolean function for finding proper intersection or not
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| 195 | // of two line segments (a,b) and (c,d).
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| 196 |
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| 197 | G4bool Diagonalie( G4PolyPhiFaceVertex *a, G4PolyPhiFaceVertex *b );
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| 198 | // Boolean Diagonalie help to determine if diagonal s
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| 199 | // of segment (a,b) is convex or reflex.
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| 200 |
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| 201 | G4bool InCone( G4PolyPhiFaceVertex *a, G4PolyPhiFaceVertex *b );
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| 202 | // Boolean function for determining if b is inside the cone (a0,a,a1)
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| 203 | // where a is the center of the cone.
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| 204 |
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| 205 | G4bool Diagonal( G4PolyPhiFaceVertex *a, G4PolyPhiFaceVertex *b );
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| 206 | // Boolean function for determining if Diagonal is possible
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| 207 | // inside Polycone or PolyHedra.
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| 208 |
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| 209 | void EarInit();
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| 210 | // Initialisation for Triangulisation by ear tips.
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| 211 | // For details see "Computational Geometry in C" by Joseph O'Rourke.
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| 212 |
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| 213 | void Triangulate();
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| 214 | // Triangulisation by ear tips for Polycone or Polyhedra.
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| 215 | // For details see "Computational Geometry in C" by Joseph O'Rourke.
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| 216 | // NOTE: a copy of the shape is made and this copy is reordered in
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| 217 | // order to have a list of triangles. This list is used by the
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| 218 | // method GetPointOnFace().
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| 219 |
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| 220 | protected:
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| 221 |
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| 222 | G4int numEdges; // Number of edges
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| 223 | G4PolyPhiFaceEdge *edges; // The edges of the face
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| 224 | G4PolyPhiFaceVertex *corners; // And the corners
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| 225 | G4ThreeVector normal; // Normal unit vector
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| 226 | G4ThreeVector radial; // Unit vector along radial direction
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| 227 | G4ThreeVector surface; // Point on surface
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| 228 | G4ThreeVector surface_point; // Auxiliary point on surface used for
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| 229 | // method GetPointOnFace()
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| 230 | G4double rMin, rMax, // Extent in r
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| 231 | zMin, zMax; // Extent in z
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| 232 | G4bool allBehind; // True if the polycone/polyhedra
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| 233 | // is behind the place of this face
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| 234 | G4double kCarTolerance;// Surface thickness
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| 235 | G4double fSurfaceArea; // Surface Area of PolyPhiFace
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| 236 | G4PolyPhiFaceVertex *triangles; // Auxiliary pointer to 'corners' used for
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| 237 | // triangulation. Copy structure, changing
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| 238 | // the structure of 'corners' (ear removal)
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| 239 | };
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| 240 |
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| 241 | #include "G4PolyPhiFace.icc"
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| 242 |
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| 243 | #endif
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