| Geant4 Cross Reference |
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25 //
26 // G4ExtrudedSolid
27 //
28 // Class description:
29 //
30 // G4ExtrudedSolid is a solid which represents the extrusion of an arbitrary
31 // polygon with fixed outline in the defined Z sections.
32 // The z-sides of the solid are the scaled versions of the same polygon.
33 // The solid is implemented as a specification of G4TessellatedSolid.
34 //
35 // Parameters in the constructor:
36 // const G4String& pName - solid name
37 // std::vector<G4TwoVector> polygon - the vertices of the outlined polygon
38 // defined in clockwise or anti-clockwise order
39 // std::vector<ZSection> - the z-sections defined by
40 // z position, offset and scale
41 // in increasing z-position order
42 //
43 // Parameters in the special constructor (for solid with 2 z-sections:
44 // G4double halfZ - the solid half length in Z
45 // G4TwoVector off1 - offset of the side in -halfZ
46 // G4double scale1 - scale of the side in -halfZ
47 // G4TwoVector off2 - offset of the side in +halfZ
48 // G4double scale2 - scale of the side in -halfZ
49
50 // Author: Ivana Hrivnacova, IPN Orsay
51 // --------------------------------------------------------------------
52 #ifndef G4EXTRUDEDSOLID_HH
53 #define G4EXTRUDEDSOLID_HH
54
55 #include "G4GeomTypes.hh"
56
57 #if defined(G4GEOM_USE_USOLIDS)
58 #define G4GEOM_USE_UEXTRUDEDSOLID 1
59 #endif
60
61 #if defined(G4GEOM_USE_UEXTRUDEDSOLID)
62 #define G4UExtrudedSolid G4ExtrudedSolid
63 #include "G4UExtrudedSolid.hh"
64 #else
65
66 #include <vector>
67
68 #include "G4TwoVector.hh"
69 #include "G4TessellatedSolid.hh"
70
71 class G4ExtrudedSolid : public G4TessellatedSolid
72 {
73
74 public:
75
76 struct ZSection
77 {
78 ZSection() : fZ(0.), fOffset(0.,0.), fScale(1.) {}
79 ZSection(G4double z, const G4TwoVector& offset, G4double scale)
80 : fZ(z), fOffset(offset), fScale(scale) {}
81
82 G4double fZ;
83 G4TwoVector fOffset;
84 G4double fScale;
85 };
86
87 G4ExtrudedSolid( const G4String& pName,
88 const std::vector<G4TwoVector>& polygon,
89 const std::vector<ZSection>& zsections);
90 // General constructor
91
92 G4ExtrudedSolid( const G4String& pName,
93 const std::vector<G4TwoVector>& polygon,
94 G4double halfZ,
95 const G4TwoVector& off1 = G4TwoVector(0.,0.),
96 G4double scale1 = 1.,
97 const G4TwoVector& off2 = G4TwoVector(0.,0.),
98 G4double scale2 = 1. );
99 // Special constructor for solid with 2 z-sections
100
101 ~G4ExtrudedSolid() override;
102 // Destructor
103
104 // Accessors
105
106 inline G4int GetNofVertices() const;
107 inline G4TwoVector GetVertex(G4int index) const;
108 inline std::vector<G4TwoVector> GetPolygon() const;
109
110 inline G4int GetNofZSections() const;
111 inline ZSection GetZSection(G4int index) const;
112 inline std::vector<ZSection> GetZSections() const;
113
114 // Solid methods
115
116 EInside Inside(const G4ThreeVector& p) const override;
117 G4ThreeVector SurfaceNormal(const G4ThreeVector& p) const override;
118 G4double DistanceToIn(const G4ThreeVector& p,
119 const G4ThreeVector& v) const override;
120 G4double DistanceToIn(const G4ThreeVector& p ) const override;
121 G4double DistanceToOut(const G4ThreeVector& p,
122 const G4ThreeVector& v,
123 const G4bool calcNorm = false,
124 G4bool* validNorm = nullptr,
125 G4ThreeVector* n = nullptr) const override;
126 G4double DistanceToOut(const G4ThreeVector& p) const override;
127
128 void BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const override;
129 G4bool CalculateExtent(const EAxis pAxis,
130 const G4VoxelLimits& pVoxelLimit,
131 const G4AffineTransform& pTransform,
132 G4double& pMin, G4double& pMax) const override;
133 G4GeometryType GetEntityType () const override;
134 G4bool IsFaceted () const override;
135 G4VSolid* Clone() const override;
136
137 std::ostream& StreamInfo(std::ostream& os) const override;
138
139 G4ExtrudedSolid(__void__&);
140 // Fake default constructor for usage restricted to direct object
141 // persistency for clients requiring preallocation of memory for
142 // persistifiable objects.
143
144 G4ExtrudedSolid(const G4ExtrudedSolid& rhs);
145 G4ExtrudedSolid& operator=(const G4ExtrudedSolid& rhs);
146 // Copy constructor and assignment operator.
147
148 private:
149
150 void ComputeProjectionParameters();
151 void ComputeLateralPlanes();
152 inline G4bool PointInPolygon(const G4ThreeVector& p) const;
153 inline G4double DistanceToPolygonSqr(const G4ThreeVector& p) const;
154 G4ThreeVector ApproxSurfaceNormal(const G4ThreeVector& p) const;
155
156 G4ThreeVector GetVertex(G4int iz, G4int ind) const;
157 G4TwoVector ProjectPoint(const G4ThreeVector& point) const;
158
159 G4bool IsSameLine(const G4TwoVector& p,
160 const G4TwoVector& l1,
161 const G4TwoVector& l2) const;
162 G4bool IsSameLineSegment(const G4TwoVector& p,
163 const G4TwoVector& l1,
164 const G4TwoVector& l2) const;
165 G4bool IsSameSide(const G4TwoVector& p1,
166 const G4TwoVector& p2,
167 const G4TwoVector& l1,
168 const G4TwoVector& l2) const;
169 G4bool IsPointInside(const G4TwoVector& a,
170 const G4TwoVector& b,
171 const G4TwoVector& c,
172 const G4TwoVector& p) const;
173 G4double GetAngle(const G4TwoVector& p0,
174 const G4TwoVector& pa,
175 const G4TwoVector& pb) const;
176
177 G4VFacet* MakeDownFacet(G4int ind1, G4int ind2, G4int ind3) const;
178 G4VFacet* MakeUpFacet(G4int ind1, G4int ind2, G4int ind3) const;
179
180 G4bool AddGeneralPolygonFacets();
181 G4bool MakeFacets();
182
183 private:
184
185 std::size_t fNv;
186 std::size_t fNz;
187 std::vector<G4TwoVector> fPolygon;
188 std::vector<ZSection> fZSections;
189 std::vector< std::vector<G4int> > fTriangles;
190 G4bool fIsConvex = false;
191 G4GeometryType fGeometryType;
192
193 G4int fSolidType = 0;
194 struct plane { G4double a,b,c,d; }; // a*x + b*y + c*z + d = 0
195 std::vector<plane> fPlanes;
196 struct line { G4double k,m; }; // x = k*y + m;
197 std::vector<line> fLines;
198 std::vector<G4double> fLengths; // edge lengths
199
200 std::vector<G4double> fKScales;
201 std::vector<G4double> fScale0s;
202 std::vector<G4TwoVector> fKOffsets;
203 std::vector<G4TwoVector> fOffset0s;
204 };
205
206 #include "G4ExtrudedSolid.icc"
207
208 #endif
209
210 #endif
211