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25 //
26 // Implementation for G4UTubs wrapper class
27 //
28 // 30.10.13 G.Cosmo, CERN/PH
29 // --------------------------------------------------------------------
30
31 #include "G4Tubs.hh"
32 #include "G4UTubs.hh"
33
34 #if ( defined(G4GEOM_USE_USOLIDS) || defined(G4GEOM_USE_PARTIAL_USOLIDS) )
35
36 #include "G4GeomTools.hh"
37 #include "G4AffineTransform.hh"
38 #include "G4VPVParameterisation.hh"
39 #include "G4BoundingEnvelope.hh"
40
41 using namespace CLHEP;
42
43 /////////////////////////////////////////////////////////////////////////
44 //
45 // Constructor - check parameters, convert angles so 0<sphi+dpshi<=2_PI
46 // - note if pdphi>2PI then reset to 2PI
47
48 G4UTubs::G4UTubs( const G4String& pName,
49 G4double pRMin, G4double pRMax,
50 G4double pDz,
51 G4double pSPhi, G4double pDPhi )
52 : Base_t(pName, pRMin, pRMax, pDz, pSPhi, pDPhi)
53 {
54 }
55
56 ///////////////////////////////////////////////////////////////////////
57 //
58 // Fake default constructor - sets only member data and allocates memory
59 // for usage restricted to object persistency.
60 //
61 G4UTubs::G4UTubs( __void__& a )
62 : Base_t(a)
63 {
64 }
65
66 //////////////////////////////////////////////////////////////////////////
67 //
68 // Destructor
69
70 G4UTubs::~G4UTubs() = default;
71
72 //////////////////////////////////////////////////////////////////////////
73 //
74 // Copy constructor
75
76 G4UTubs::G4UTubs(const G4UTubs& rhs)
77 : Base_t(rhs)
78 {
79 }
80
81 //////////////////////////////////////////////////////////////////////////
82 //
83 // Assignment operator
84
85 G4UTubs& G4UTubs::operator = (const G4UTubs& rhs)
86 {
87 // Check assignment to self
88 //
89 if (this == &rhs) { return *this; }
90
91 // Copy base class data
92 //
93 Base_t::operator=(rhs);
94
95 return *this;
96 }
97
98 /////////////////////////////////////////////////////////////////////////
99 //
100 // Accessors and modifiers
101
102 G4double G4UTubs::GetInnerRadius() const
103 {
104 return rmin();
105 }
106 G4double G4UTubs::GetOuterRadius() const
107 {
108 return rmax();
109 }
110 G4double G4UTubs::GetZHalfLength() const
111 {
112 return z();
113 }
114 G4double G4UTubs::GetStartPhiAngle() const
115 {
116 return sphi();
117 }
118 G4double G4UTubs::GetDeltaPhiAngle() const
119 {
120 return dphi();
121 }
122 G4double G4UTubs::GetSinStartPhi() const
123 {
124 return std::sin(GetStartPhiAngle());
125 }
126 G4double G4UTubs::GetCosStartPhi() const
127 {
128 return std::cos(GetStartPhiAngle());
129 }
130 G4double G4UTubs::GetSinEndPhi() const
131 {
132 return std::sin(GetStartPhiAngle()+GetDeltaPhiAngle());
133 }
134 G4double G4UTubs::GetCosEndPhi() const
135 {
136 return std::cos(GetStartPhiAngle()+GetDeltaPhiAngle());
137 }
138
139 void G4UTubs::SetInnerRadius(G4double newRMin)
140 {
141 SetRMin(newRMin);
142 fRebuildPolyhedron = true;
143 }
144 void G4UTubs::SetOuterRadius(G4double newRMax)
145 {
146 SetRMax(newRMax);
147 fRebuildPolyhedron = true;
148 }
149 void G4UTubs::SetZHalfLength(G4double newDz)
150 {
151 SetDz(newDz);
152 fRebuildPolyhedron = true;
153 }
154 void G4UTubs::SetStartPhiAngle(G4double newSPhi, G4bool)
155 {
156 SetSPhi(newSPhi);
157 fRebuildPolyhedron = true;
158 }
159 void G4UTubs::SetDeltaPhiAngle(G4double newDPhi)
160 {
161 SetDPhi(newDPhi);
162 fRebuildPolyhedron = true;
163 }
164
165 /////////////////////////////////////////////////////////////////////////
166 //
167 // Dispatch to parameterisation for replication mechanism dimension
168 // computation & modification.
169
170 void G4UTubs::ComputeDimensions( G4VPVParameterisation* p,
171 const G4int n,
172 const G4VPhysicalVolume* pRep )
173 {
174 p->ComputeDimensions(*(G4Tubs*)this,n,pRep) ;
175 }
176
177 /////////////////////////////////////////////////////////////////////////
178 //
179 // Make a clone of the object
180
181 G4VSolid* G4UTubs::Clone() const
182 {
183 return new G4UTubs(*this);
184 }
185
186 //////////////////////////////////////////////////////////////////////////
187 //
188 // Get bounding box
189
190 void G4UTubs::BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const
191 {
192 static G4bool checkBBox = true;
193
194 G4double rmin = GetInnerRadius();
195 G4double rmax = GetOuterRadius();
196 G4double dz = GetZHalfLength();
197
198 // Find bounding box
199 //
200 if (GetDeltaPhiAngle() < twopi)
201 {
202 G4TwoVector vmin,vmax;
203 G4GeomTools::DiskExtent(rmin,rmax,
204 GetSinStartPhi(),GetCosStartPhi(),
205 GetSinEndPhi(),GetCosEndPhi(),
206 vmin,vmax);
207 pMin.set(vmin.x(),vmin.y(),-dz);
208 pMax.set(vmax.x(),vmax.y(), dz);
209 }
210 else
211 {
212 pMin.set(-rmax,-rmax,-dz);
213 pMax.set( rmax, rmax, dz);
214 }
215
216 // Check correctness of the bounding box
217 //
218 if (pMin.x() >= pMax.x() || pMin.y() >= pMax.y() || pMin.z() >= pMax.z())
219 {
220 std::ostringstream message;
221 message << "Bad bounding box (min >= max) for solid: "
222 << GetName() << " !"
223 << "\npMin = " << pMin
224 << "\npMax = " << pMax;
225 G4Exception("G4UTubs::BoundingLimits()", "GeomMgt0001",
226 JustWarning, message);
227 StreamInfo(G4cout);
228 }
229
230 // Check consistency of bounding boxes
231 //
232 if (checkBBox)
233 {
234 U3Vector vmin, vmax;
235 Extent(vmin,vmax);
236 if (std::abs(pMin.x()-vmin.x()) > kCarTolerance ||
237 std::abs(pMin.y()-vmin.y()) > kCarTolerance ||
238 std::abs(pMin.z()-vmin.z()) > kCarTolerance ||
239 std::abs(pMax.x()-vmax.x()) > kCarTolerance ||
240 std::abs(pMax.y()-vmax.y()) > kCarTolerance ||
241 std::abs(pMax.z()-vmax.z()) > kCarTolerance)
242 {
243 std::ostringstream message;
244 message << "Inconsistency in bounding boxes for solid: "
245 << GetName() << " !"
246 << "\nBBox min: wrapper = " << pMin << " solid = " << vmin
247 << "\nBBox max: wrapper = " << pMax << " solid = " << vmax;
248 G4Exception("G4UTubs::BoundingLimits()", "GeomMgt0001",
249 JustWarning, message);
250 checkBBox = false;
251 }
252 }
253 }
254
255 //////////////////////////////////////////////////////////////////////////
256 //
257 // Calculate extent under transform and specified limit
258
259 G4bool
260 G4UTubs::CalculateExtent(const EAxis pAxis,
261 const G4VoxelLimits& pVoxelLimit,
262 const G4AffineTransform& pTransform,
263 G4double& pMin, G4double& pMax) const
264 {
265 G4ThreeVector bmin, bmax;
266 G4bool exist;
267
268 // Get bounding box
269 BoundingLimits(bmin,bmax);
270
271 // Check bounding box
272 G4BoundingEnvelope bbox(bmin,bmax);
273 #ifdef G4BBOX_EXTENT
274 if (true) return bbox.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
275 #endif
276 if (bbox.BoundingBoxVsVoxelLimits(pAxis,pVoxelLimit,pTransform,pMin,pMax))
277 {
278 return exist = pMin < pMax;
279 }
280
281 // Get parameters of the solid
282 G4double rmin = GetInnerRadius();
283 G4double rmax = GetOuterRadius();
284 G4double dz = GetZHalfLength();
285 G4double dphi = GetDeltaPhiAngle();
286
287 // Find bounding envelope and calculate extent
288 //
289 const G4int NSTEPS = 24; // number of steps for whole circle
290 G4double astep = twopi/NSTEPS; // max angle for one step
291 G4int ksteps = (dphi <= astep) ? 1 : (G4int)((dphi-deg)/astep) + 1;
292 G4double ang = dphi/ksteps;
293
294 G4double sinHalf = std::sin(0.5*ang);
295 G4double cosHalf = std::cos(0.5*ang);
296 G4double sinStep = 2.*sinHalf*cosHalf;
297 G4double cosStep = 1. - 2.*sinHalf*sinHalf;
298 G4double rext = rmax/cosHalf;
299
300 // bounding envelope for full cylinder consists of two polygons,
301 // in other cases it is a sequence of quadrilaterals
302 if (rmin == 0 && dphi == twopi)
303 {
304 G4double sinCur = sinHalf;
305 G4double cosCur = cosHalf;
306
307 G4ThreeVectorList baseA(NSTEPS),baseB(NSTEPS);
308 for (G4int k=0; k<NSTEPS; ++k)
309 {
310 baseA[k].set(rext*cosCur,rext*sinCur,-dz);
311 baseB[k].set(rext*cosCur,rext*sinCur, dz);
312
313 G4double sinTmp = sinCur;
314 sinCur = sinCur*cosStep + cosCur*sinStep;
315 cosCur = cosCur*cosStep - sinTmp*sinStep;
316 }
317 std::vector<const G4ThreeVectorList *> polygons(2);
318 polygons[0] = &baseA;
319 polygons[1] = &baseB;
320 G4BoundingEnvelope benv(bmin,bmax,polygons);
321 exist = benv.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
322 }
323 else
324 {
325 G4double sinStart = GetSinStartPhi();
326 G4double cosStart = GetCosStartPhi();
327 G4double sinEnd = GetSinEndPhi();
328 G4double cosEnd = GetCosEndPhi();
329 G4double sinCur = sinStart*cosHalf + cosStart*sinHalf;
330 G4double cosCur = cosStart*cosHalf - sinStart*sinHalf;
331
332 // set quadrilaterals
333 G4ThreeVectorList pols[NSTEPS+2];
334 for (G4int k=0; k<ksteps+2; ++k) pols[k].resize(4);
335 pols[0][0].set(rmin*cosStart,rmin*sinStart, dz);
336 pols[0][1].set(rmin*cosStart,rmin*sinStart,-dz);
337 pols[0][2].set(rmax*cosStart,rmax*sinStart,-dz);
338 pols[0][3].set(rmax*cosStart,rmax*sinStart, dz);
339 for (G4int k=1; k<ksteps+1; ++k)
340 {
341 pols[k][0].set(rmin*cosCur,rmin*sinCur, dz);
342 pols[k][1].set(rmin*cosCur,rmin*sinCur,-dz);
343 pols[k][2].set(rext*cosCur,rext*sinCur,-dz);
344 pols[k][3].set(rext*cosCur,rext*sinCur, dz);
345
346 G4double sinTmp = sinCur;
347 sinCur = sinCur*cosStep + cosCur*sinStep;
348 cosCur = cosCur*cosStep - sinTmp*sinStep;
349 }
350 pols[ksteps+1][0].set(rmin*cosEnd,rmin*sinEnd, dz);
351 pols[ksteps+1][1].set(rmin*cosEnd,rmin*sinEnd,-dz);
352 pols[ksteps+1][2].set(rmax*cosEnd,rmax*sinEnd,-dz);
353 pols[ksteps+1][3].set(rmax*cosEnd,rmax*sinEnd, dz);
354
355 // set envelope and calculate extent
356 std::vector<const G4ThreeVectorList *> polygons;
357 polygons.resize(ksteps+2);
358 for (G4int k=0; k<ksteps+2; ++k) polygons[k] = &pols[k];
359 G4BoundingEnvelope benv(bmin,bmax,polygons);
360 exist = benv.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
361 }
362 return exist;
363 }
364
365 //////////////////////////////////////////////////////////////////////////
366 //
367 // Create polyhedron for visualization
368 //
369 G4Polyhedron* G4UTubs::CreatePolyhedron() const
370 {
371 return new G4PolyhedronTubs(GetInnerRadius(),
372 GetOuterRadius(),
373 GetZHalfLength(),
374 GetStartPhiAngle(),
375 GetDeltaPhiAngle());
376 }
377
378 #endif // G4GEOM_USE_USOLIDS
379