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25 //
26 // Implementation for G4UEllipticalTube wrapper class
27 //
28 // 13-08-2019 Gabriele Cosmo, CERN
29 // --------------------------------------------------------------------
30
31 #include "G4EllipticalTube.hh"
32 #include "G4UEllipticalTube.hh"
33
34 #if ( defined(G4GEOM_USE_USOLIDS) || defined(G4GEOM_USE_PARTIAL_USOLIDS) )
35
36 #include "G4AffineTransform.hh"
37 #include "G4VPVParameterisation.hh"
38 #include "G4PhysicalConstants.hh"
39 #include "G4BoundingEnvelope.hh"
40 #include "G4Polyhedron.hh"
41
42 ////////////////////////////////////////////////////////////////////////
43 //
44 // Constructor - check & set half widths
45
46
47 G4UEllipticalTube::G4UEllipticalTube(const G4String& pName,
48 G4double dx,
49 G4double dy,
50 G4double dz )
51 : Base_t(pName, dx, dy, dz)
52 { }
53
54 //////////////////////////////////////////////////////////////////////////
55 //
56 // Fake default constructor - sets only member data and allocates memory
57 // for usage restricted to object persistency.
58
59 G4UEllipticalTube::G4UEllipticalTube( __void__& a )
60 : Base_t(a)
61 { }
62
63 //////////////////////////////////////////////////////////////////////////
64 //
65 // Destructor
66
67 G4UEllipticalTube::~G4UEllipticalTube() = default;
68
69 //////////////////////////////////////////////////////////////////////////
70 //
71 // Copy constructor
72
73 G4UEllipticalTube::G4UEllipticalTube(const G4UEllipticalTube& rhs)
74 : Base_t(rhs)
75 { }
76
77 //////////////////////////////////////////////////////////////////////////
78 //
79 // Assignment operator
80
81 G4UEllipticalTube& G4UEllipticalTube::operator = (const G4UEllipticalTube& rhs)
82 {
83 // Check assignment to self
84 //
85 if (this == &rhs) { return *this; }
86
87 // Copy base class data
88 //
89 Base_t::operator=(rhs);
90
91 return *this;
92 }
93
94 //////////////////////////////////////////////////////////////////////////
95 //
96 // Accessors
97
98 G4double G4UEllipticalTube::GetDx() const
99 {
100 return Base_t::GetDx();
101 }
102
103 G4double G4UEllipticalTube::GetDy() const
104 {
105 return Base_t::GetDy();
106 }
107
108 G4double G4UEllipticalTube::GetDz() const
109 {
110 return Base_t::GetDz();
111 }
112
113 //////////////////////////////////////////////////////////////////////////
114 //
115 // Modifiers
116
117 void G4UEllipticalTube::SetDx(G4double dx)
118 {
119 Base_t::SetDx(dx);
120 }
121
122 void G4UEllipticalTube::SetDy(G4double dy)
123 {
124 Base_t::SetDy(dy);
125 }
126
127 void G4UEllipticalTube::SetDz(G4double dz)
128 {
129 Base_t::SetDz(dz);
130 }
131
132 //////////////////////////////////////////////////////////////////////////
133 //
134 // Make a clone of the object
135
136 G4VSolid* G4UEllipticalTube::Clone() const
137 {
138 return new G4UEllipticalTube(*this);
139 }
140
141 //////////////////////////////////////////////////////////////////////////
142 //
143 // Get bounding box
144
145 void G4UEllipticalTube::BoundingLimits(G4ThreeVector& pMin,
146 G4ThreeVector& pMax) const
147 {
148 G4double dx = GetDx();
149 G4double dy = GetDy();
150 G4double dz = GetDz();
151
152 pMin.set(-dx,-dy,-dz);
153 pMax.set( dx, dy, dz);
154 }
155
156 //////////////////////////////////////////////////////////////////////////
157 //
158 // Calculate extent under transform and specified limit
159
160 G4bool
161 G4UEllipticalTube::CalculateExtent(const EAxis pAxis,
162 const G4VoxelLimits& pVoxelLimit,
163 const G4AffineTransform& pTransform,
164 G4double& pMin, G4double& pMax) const
165 {
166 G4ThreeVector bmin, bmax;
167 G4bool exist;
168
169 // Check bounding box (bbox)
170 //
171 BoundingLimits(bmin,bmax);
172 G4BoundingEnvelope bbox(bmin,bmax);
173 #ifdef G4BBOX_EXTENT
174 return bbox.CalculateExtent(pAxis,pVoxelLimit, pTransform, pMin, pMax);
175 #endif
176 if (bbox.BoundingBoxVsVoxelLimits(pAxis, pVoxelLimit, pTransform, pMin, pMax))
177 {
178 return exist = pMin < pMax;
179 }
180
181 G4double dx = GetDx();
182 G4double dy = GetDy();
183 G4double dz = GetDz();
184
185 // Set bounding envelope (benv) and calculate extent
186 //
187 const G4int NSTEPS = 24; // number of steps for whole circle
188 G4double ang = twopi/NSTEPS;
189
190 G4double sinHalf = std::sin(0.5*ang);
191 G4double cosHalf = std::cos(0.5*ang);
192 G4double sinStep = 2.*sinHalf*cosHalf;
193 G4double cosStep = 1. - 2.*sinHalf*sinHalf;
194 G4double sx = dx/cosHalf;
195 G4double sy = dy/cosHalf;
196
197 G4double sinCur = sinHalf;
198 G4double cosCur = cosHalf;
199 G4ThreeVectorList baseA(NSTEPS), baseB(NSTEPS);
200 for (G4int k=0; k<NSTEPS; ++k)
201 {
202 baseA[k].set(sx*cosCur,sy*sinCur,-dz);
203 baseB[k].set(sx*cosCur,sy*sinCur, dz);
204
205 G4double sinTmp = sinCur;
206 sinCur = sinCur*cosStep + cosCur*sinStep;
207 cosCur = cosCur*cosStep - sinTmp*sinStep;
208 }
209
210 std::vector<const G4ThreeVectorList *> polygons(2);
211 polygons[0] = &baseA;
212 polygons[1] = &baseB;
213 G4BoundingEnvelope benv(bmin, bmax, polygons);
214 exist = benv.CalculateExtent(pAxis, pVoxelLimit, pTransform, pMin, pMax);
215 return exist;
216 }
217
218 ////////////////////////////////////////////////////////////////////////
219 //
220 // CreatePolyhedron
221 //
222 G4Polyhedron* G4UEllipticalTube::CreatePolyhedron() const
223 {
224 // create cylinder with radius=1...
225 //
226 G4Polyhedron* eTube = new G4PolyhedronTube(0., 1., GetDz());
227
228 // apply non-uniform scaling...
229 //
230 eTube->Transform(G4Scale3D(GetDx(), GetDy(), 1.));
231 return eTube;
232 }
233
234 #endif // G4GEOM_USE_USOLIDS
235