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25 //
26 // Implementation for G4UEllipticalCone wrapper class
27 //
28 // 13-08-2019 Gabriele Cosmo, CERN
29 // --------------------------------------------------------------------
30
31 #include "G4EllipticalCone.hh"
32 #include "G4UEllipticalCone.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 G4UEllipticalCone::G4UEllipticalCone(const G4String& pName,
48 G4double a,
49 G4double b,
50 G4double h,
51 G4double cut )
52 : Base_t(pName, a, b, h, cut)
53 { }
54
55 //////////////////////////////////////////////////////////////////////////
56 //
57 // Fake default constructor - sets only member data and allocates memory
58 // for usage restricted to object persistency.
59
60 G4UEllipticalCone::G4UEllipticalCone( __void__& a )
61 : Base_t(a)
62 { }
63
64 //////////////////////////////////////////////////////////////////////////
65 //
66 // Destructor
67
68 G4UEllipticalCone::~G4UEllipticalCone() = default;
69
70 //////////////////////////////////////////////////////////////////////////
71 //
72 // Copy constructor
73
74 G4UEllipticalCone::G4UEllipticalCone(const G4UEllipticalCone& rhs)
75 : Base_t(rhs)
76 { }
77
78 //////////////////////////////////////////////////////////////////////////
79 //
80 // Assignment operator
81
82 G4UEllipticalCone& G4UEllipticalCone::operator = (const G4UEllipticalCone& rhs)
83 {
84 // Check assignment to self
85 //
86 if (this == &rhs) { return *this; }
87
88 // Copy base class data
89 //
90 Base_t::operator=(rhs);
91
92 return *this;
93 }
94
95 //////////////////////////////////////////////////////////////////////////
96 //
97 // Accessors
98
99 G4double G4UEllipticalCone::GetSemiAxisX() const
100 {
101 return Base_t::GetSemiAxisX();
102 }
103
104 G4double G4UEllipticalCone::GetSemiAxisY() const
105 {
106 return Base_t::GetSemiAxisY();
107 }
108
109 G4double G4UEllipticalCone::GetZMax() const
110 {
111 return Base_t::GetZMax();
112 }
113
114 G4double G4UEllipticalCone::GetZTopCut() const
115 {
116 return Base_t::GetZTopCut();
117 }
118
119 G4double G4UEllipticalCone::GetSemiAxisMax () const
120 {
121 return std::max(GetSemiAxisX(),GetSemiAxisY());
122 }
123
124 G4double G4UEllipticalCone::GetSemiAxisMin () const
125 {
126 return std::min(GetSemiAxisX(),GetSemiAxisY());
127 }
128
129 //////////////////////////////////////////////////////////////////////////
130 //
131 // Modifiers
132
133 void G4UEllipticalCone::SetSemiAxis(G4double x, G4double y, G4double z)
134 {
135 Base_t::SetParameters(x, y, z, GetZTopCut());
136 }
137
138 void G4UEllipticalCone::SetZCut(G4double newzTopCut)
139 {
140 Base_t::SetParameters(GetSemiAxisX(), GetSemiAxisY(), GetZMax(), newzTopCut);
141 }
142
143 //////////////////////////////////////////////////////////////////////////
144 //
145 // Make a clone of the object
146
147 G4VSolid* G4UEllipticalCone::Clone() const
148 {
149 return new G4UEllipticalCone(*this);
150 }
151
152 //////////////////////////////////////////////////////////////////////////
153 //
154 // Get bounding box
155
156 void G4UEllipticalCone::BoundingLimits(G4ThreeVector& pMin,
157 G4ThreeVector& pMax) const
158 {
159 G4double zcut = GetZTopCut();
160 G4double height = GetZMax();
161 G4double xmax = GetSemiAxisX()*(height+zcut);
162 G4double ymax = GetSemiAxisY()*(height+zcut);
163 pMin.set(-xmax,-ymax,-zcut);
164 pMax.set( xmax, ymax, zcut);
165
166 // Check correctness of the bounding box
167 //
168 if (pMin.x() >= pMax.x() || pMin.y() >= pMax.y() || pMin.z() >= pMax.z())
169 {
170 std::ostringstream message;
171 message << "Bad bounding box (min >= max) for solid: "
172 << GetName() << " !"
173 << "\npMin = " << pMin
174 << "\npMax = " << pMax;
175 G4Exception("G4UEllipticalCone::BoundingLimits()", "GeomMgt0001",
176 JustWarning, message);
177 StreamInfo(G4cout);
178 }
179 }
180
181 //////////////////////////////////////////////////////////////////////////
182 //
183 // Calculate extent under transform and specified limit
184
185 G4bool
186 G4UEllipticalCone::CalculateExtent(const EAxis pAxis,
187 const G4VoxelLimits& pVoxelLimit,
188 const G4AffineTransform& pTransform,
189 G4double& pMin, G4double& pMax) const
190 {
191 G4ThreeVector bmin,bmax;
192 G4bool exist;
193
194 // Check bounding box (bbox)
195 //
196 BoundingLimits(bmin,bmax);
197 G4BoundingEnvelope bbox(bmin,bmax);
198 #ifdef G4BBOX_EXTENT
199 return bbox.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
200 #endif
201 if (bbox.BoundingBoxVsVoxelLimits(pAxis,pVoxelLimit,pTransform,pMin,pMax))
202 {
203 return exist = pMin < pMax;
204 }
205
206 // Set bounding envelope (benv) and calculate extent
207 //
208 static const G4int NSTEPS = 48; // number of steps for whole circle
209 static const G4double ang = twopi/NSTEPS;
210 static const G4double sinHalf = std::sin(0.5*ang);
211 static const G4double cosHalf = std::cos(0.5*ang);
212 static const G4double sinStep = 2.*sinHalf*cosHalf;
213 static const G4double cosStep = 1. - 2.*sinHalf*sinHalf;
214 G4double zcut = bmax.z();
215 G4double height = GetZMax();
216 G4double sxmin = GetSemiAxisX()*(height-zcut)/cosHalf;
217 G4double symin = GetSemiAxisY()*(height-zcut)/cosHalf;
218 G4double sxmax = bmax.x()/cosHalf;
219 G4double symax = bmax.y()/cosHalf;
220
221 G4double sinCur = sinHalf;
222 G4double cosCur = cosHalf;
223 G4ThreeVectorList baseA(NSTEPS),baseB(NSTEPS);
224 for (G4int k=0; k<NSTEPS; ++k)
225 {
226 baseA[k].set(sxmax*cosCur,symax*sinCur,-zcut);
227 baseB[k].set(sxmin*cosCur,symin*sinCur, zcut);
228
229 G4double sinTmp = sinCur;
230 sinCur = sinCur*cosStep + cosCur*sinStep;
231 cosCur = cosCur*cosStep - sinTmp*sinStep;
232 }
233
234 std::vector<const G4ThreeVectorList *> polygons(2);
235 polygons[0] = &baseA;
236 polygons[1] = &baseB;
237 G4BoundingEnvelope benv(bmin,bmax,polygons);
238 exist = benv.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
239 return exist;
240 }
241
242 ////////////////////////////////////////////////////////////////////////
243 //
244 // CreatePolyhedron
245 //
246 G4Polyhedron* G4UEllipticalCone::CreatePolyhedron() const
247 {
248 return new G4PolyhedronEllipticalCone(GetSemiAxisX(), GetSemiAxisY(),
249 GetZMax(), GetZTopCut());
250 }
251
252 #endif // G4GEOM_USE_USOLIDS
253