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25 // 25 //
>> 26 // $Id: G4Ellipsoid.cc,v 1.30 2010-10-20 08:54:18 gcosmo Exp $
>> 27 // GEANT4 tag $Name: not supported by cvs2svn $
>> 28 //
26 // class G4Ellipsoid 29 // class G4Ellipsoid
27 // 30 //
28 // Implementation of G4Ellipsoid class << 31 // Implementation for G4Ellipsoid class
>> 32 //
>> 33 // History:
>> 34 //
>> 35 // 10.11.99 G.Horton-Smith -- first writing, based on G4Sphere class
>> 36 // 25.02.05 G.Guerrieri -- Modified for future Geant4 release
29 // 37 //
30 // 10.11.99 G.Horton-Smith: first writing, bas <<
31 // 25.02.05 G.Guerrieri: Revised <<
32 // 15.12.19 E.Tcherniaev: Complete revision <<
33 // ------------------------------------------- 38 // --------------------------------------------------------------------
34 39
35 #include "G4Ellipsoid.hh" <<
36 <<
37 #if !(defined(G4GEOM_USE_UELLIPSOID) && define <<
38 <<
39 #include "globals.hh" 40 #include "globals.hh"
40 41
>> 42 #include "G4Ellipsoid.hh"
>> 43
41 #include "G4VoxelLimits.hh" 44 #include "G4VoxelLimits.hh"
42 #include "G4AffineTransform.hh" 45 #include "G4AffineTransform.hh"
43 #include "G4GeometryTolerance.hh" 46 #include "G4GeometryTolerance.hh"
44 #include "G4BoundingEnvelope.hh" <<
45 #include "G4RandomTools.hh" <<
46 #include "G4QuickRand.hh" <<
47 47
48 #include "G4VPVParameterisation.hh" << 48 #include "meshdefs.hh"
>> 49
>> 50 #include "Randomize.hh"
49 51
50 #include "G4VGraphicsScene.hh" 52 #include "G4VGraphicsScene.hh"
>> 53 #include "G4Polyhedron.hh"
>> 54 #include "G4NURBS.hh"
>> 55 #include "G4NURBSbox.hh"
51 #include "G4VisExtent.hh" 56 #include "G4VisExtent.hh"
52 57
53 #include "G4AutoLock.hh" <<
54 <<
55 namespace <<
56 { <<
57 G4Mutex polyhedronMutex = G4MUTEX_INITIALIZ <<
58 G4Mutex lateralareaMutex = G4MUTEX_INITIALIZ <<
59 } <<
60 <<
61 using namespace CLHEP; 58 using namespace CLHEP;
62 59
63 ////////////////////////////////////////////// << 60 ///////////////////////////////////////////////////////////////////////////////
64 // 61 //
65 // Constructor << 62 // constructor - check parameters, convert angles so 0<sphi+dpshi<=2_PI
>> 63 // - note if pDPhi>2PI then reset to 2PI
66 64
67 G4Ellipsoid::G4Ellipsoid(const G4String& name, << 65 G4Ellipsoid::G4Ellipsoid(const G4String& pName,
68 G4double xSemiA << 66 G4double pxSemiAxis,
69 G4double ySemiA << 67 G4double pySemiAxis,
70 G4double zSemiA << 68 G4double pzSemiAxis,
71 G4double zBotto << 69 G4double pzBottomCut,
72 G4double zTopCu << 70 G4double pzTopCut)
73 : G4VSolid(name), fDx(xSemiAxis), fDy(ySemiA << 71 : G4VSolid(pName), fpPolyhedron(0), fCubicVolume(0.), fSurfaceArea(0.),
74 fZBottomCut(zBottomCut), fZTopCut(zTopCut) << 72 zBottomCut(0.), zTopCut(0.)
75 { 73 {
76 CheckParameters(); << 74 // note: for users that want to use the full ellipsoid it is useful
>> 75 // to include a default for the cuts
>> 76
>> 77 kRadTolerance = G4GeometryTolerance::GetInstance()->GetRadialTolerance();
>> 78
>> 79 // Check Semi-Axis
>> 80 if ( (pxSemiAxis<=0.) || (pySemiAxis<=0.) || (pzSemiAxis<=0.) )
>> 81 {
>> 82 G4cerr << "ERROR - G4Ellipsoid::G4Ellipsoid(): " << GetName() << G4endl
>> 83 << " Invalid semi-axis !"
>> 84 << G4endl;
>> 85 G4Exception("G4Ellipsoid::G4Ellipsoid()", "InvalidSetup",
>> 86 FatalException, "Invalid semi-axis.");
>> 87 }
>> 88 SetSemiAxis(pxSemiAxis, pySemiAxis, pzSemiAxis);
>> 89
>> 90 if ( pzBottomCut == 0 && pzTopCut == 0 )
>> 91 {
>> 92 SetZCuts(-pzSemiAxis, pzSemiAxis);
>> 93 }
>> 94 else if ( (pzBottomCut < pzSemiAxis) && (pzTopCut > -pzSemiAxis)
>> 95 && (pzBottomCut < pzTopCut) )
>> 96 {
>> 97 SetZCuts(pzBottomCut, pzTopCut);
>> 98 }
>> 99 else
>> 100 {
>> 101 G4cerr << "ERROR - G4Ellipsoid::G4Ellipsoid(): " << GetName() << G4endl
>> 102 << " Invalid z-coordinate for cutting plane !"
>> 103 << G4endl;
>> 104 G4Exception("G4Ellipsoid::G4Ellipsoid()", "InvalidSetup",
>> 105 FatalException, "Invalid z-coordinate for cutting plane.");
>> 106 }
77 } 107 }
78 108
79 ////////////////////////////////////////////// << 109 ///////////////////////////////////////////////////////////////////////////////
80 // 110 //
81 // Fake default constructor - sets only member 111 // Fake default constructor - sets only member data and allocates memory
82 // for usage restri << 112 // for usage restricted to object persistency.
83 << 113 //
84 G4Ellipsoid::G4Ellipsoid( __void__& a ) 114 G4Ellipsoid::G4Ellipsoid( __void__& a )
85 : G4VSolid(a), fDx(0.), fDy(0.), fDz(0.), fZ << 115 : G4VSolid(a), fpPolyhedron(0), kRadTolerance(0.), fCubicVolume(0.),
>> 116 fSurfaceArea(0.), xSemiAxis(0.), ySemiAxis(0.), zSemiAxis(0.),
>> 117 semiAxisMax(0.), zBottomCut(0.), zTopCut(0.)
86 { 118 {
87 } 119 }
88 120
89 ////////////////////////////////////////////// << 121 ///////////////////////////////////////////////////////////////////////////////
90 // 122 //
91 // Destructor 123 // Destructor
92 124
93 G4Ellipsoid::~G4Ellipsoid() 125 G4Ellipsoid::~G4Ellipsoid()
94 { 126 {
95 delete fpPolyhedron; fpPolyhedron = nullptr; <<
96 } 127 }
97 128
98 ////////////////////////////////////////////// << 129 ///////////////////////////////////////////////////////////////////////////////
99 // 130 //
100 // Copy constructor 131 // Copy constructor
101 132
102 G4Ellipsoid::G4Ellipsoid(const G4Ellipsoid& rh 133 G4Ellipsoid::G4Ellipsoid(const G4Ellipsoid& rhs)
103 : G4VSolid(rhs), 134 : G4VSolid(rhs),
104 fDx(rhs.fDx), fDy(rhs.fDy), fDz(rhs.fDz), << 135 fpPolyhedron(0), kRadTolerance(rhs.kRadTolerance),
105 fZBottomCut(rhs.fZBottomCut), fZTopCut(rhs. << 136 fCubicVolume(rhs.fCubicVolume), fSurfaceArea(rhs.fSurfaceArea),
106 halfTolerance(rhs.halfTolerance), << 137 xSemiAxis(rhs.xSemiAxis), ySemiAxis(rhs.ySemiAxis),
107 fXmax(rhs.fXmax), fYmax(rhs.fYmax), << 138 zSemiAxis(rhs.zSemiAxis), semiAxisMax(rhs.semiAxisMax),
108 fRsph(rhs.fRsph), fR(rhs.fR), << 139 zBottomCut(rhs.zBottomCut), zTopCut(rhs.zTopCut)
109 fSx(rhs.fSx), fSy(rhs.fSy), fSz(rhs.fSz), <<
110 fZMidCut(rhs.fZMidCut), fZDimCut(rhs.fZDimC <<
111 fQ1(rhs.fQ1), fQ2(rhs.fQ2), <<
112 fCubicVolume(rhs.fCubicVolume), <<
113 fSurfaceArea(rhs.fSurfaceArea), <<
114 fLateralArea(rhs.fLateralArea) <<
115 { 140 {
116 } 141 }
117 142
118 ////////////////////////////////////////////// << 143 ///////////////////////////////////////////////////////////////////////////////
119 // 144 //
120 // Assignment operator 145 // Assignment operator
121 146
122 G4Ellipsoid& G4Ellipsoid::operator = (const G4 << 147 G4Ellipsoid& G4Ellipsoid::operator = (const G4Ellipsoid& rhs)
123 { 148 {
124 // Check assignment to self 149 // Check assignment to self
125 // 150 //
126 if (this == &rhs) { return *this; } 151 if (this == &rhs) { return *this; }
127 152
128 // Copy base class data 153 // Copy base class data
129 // 154 //
130 G4VSolid::operator=(rhs); 155 G4VSolid::operator=(rhs);
131 156
132 // Copy data 157 // Copy data
133 // 158 //
134 fDx = rhs.fDx; << 159 fpPolyhedron = 0; kRadTolerance = rhs.kRadTolerance;
135 fDy = rhs.fDy; << 160 fCubicVolume = rhs.fCubicVolume; fSurfaceArea = rhs.fSurfaceArea;
136 fDz = rhs.fDz; << 161 xSemiAxis = rhs.xSemiAxis; ySemiAxis = rhs.ySemiAxis;
137 fZBottomCut = rhs.fZBottomCut; << 162 zSemiAxis = rhs.zSemiAxis; semiAxisMax = rhs.semiAxisMax;
138 fZTopCut = rhs.fZTopCut; << 163 zBottomCut = rhs.zBottomCut; zTopCut = rhs.zTopCut;
139 <<
140 halfTolerance = rhs.halfTolerance; <<
141 fXmax = rhs.fXmax; <<
142 fYmax = rhs.fYmax; <<
143 fRsph = rhs.fRsph; <<
144 fR = rhs.fR; <<
145 fSx = rhs.fSx; <<
146 fSy = rhs.fSy; <<
147 fSz = rhs.fSz; <<
148 fZMidCut = rhs.fZMidCut; <<
149 fZDimCut = rhs.fZDimCut; <<
150 fQ1 = rhs.fQ1; <<
151 fQ2 = rhs.fQ2; <<
152 <<
153 fCubicVolume = rhs.fCubicVolume; <<
154 fSurfaceArea = rhs.fSurfaceArea; <<
155 fLateralArea = rhs.fLateralArea; <<
156 <<
157 fRebuildPolyhedron = false; <<
158 delete fpPolyhedron; fpPolyhedron = nullptr <<
159 164
160 return *this; 165 return *this;
161 } 166 }
162 167
163 ////////////////////////////////////////////// << 168 ///////////////////////////////////////////////////////////////////////////////
164 // 169 //
165 // Check parameters and make precalculation << 170 // Calculate extent under transform and specified limit
166 171
167 void G4Ellipsoid::CheckParameters() << 172 G4bool
>> 173 G4Ellipsoid::CalculateExtent(const EAxis pAxis,
>> 174 const G4VoxelLimits& pVoxelLimit,
>> 175 const G4AffineTransform& pTransform,
>> 176 G4double& pMin, G4double& pMax) const
168 { 177 {
169 halfTolerance = 0.5 * kCarTolerance; // half << 178 if (!pTransform.IsRotated())
170 G4double dmin = 2. * kCarTolerance; <<
171 <<
172 // Check dimensions <<
173 // <<
174 if (fDx < dmin || fDy < dmin || fDz < dmin) <<
175 { 179 {
176 std::ostringstream message; << 180 // Special case handling for unrotated solid ellipsoid
177 message << "Invalid (too small or negative << 181 // Compute x/y/z mins and maxs for bounding box respecting limits,
178 << GetName() << "\n" << 182 // with early returns if outside limits. Then switch() on pAxis,
179 << " semi-axis x: " << fDx << "\n << 183 // and compute exact x and y limit for x/y case
180 << " semi-axis y: " << fDy << "\n << 184
181 << " semi-axis z: " << fDz; << 185 G4double xoffset,xMin,xMax;
182 G4Exception("G4Ellipsoid::CheckParameters( << 186 G4double yoffset,yMin,yMax;
183 FatalException, message); << 187 G4double zoffset,zMin,zMax;
184 } << 188
185 G4double A = fDx; << 189 G4double maxDiff,newMin,newMax;
186 G4double B = fDy; << 190 G4double xoff,yoff;
187 G4double C = fDz; << 191
>> 192 xoffset=pTransform.NetTranslation().x();
>> 193 xMin=xoffset - xSemiAxis;
>> 194 xMax=xoffset + xSemiAxis;
>> 195 if (pVoxelLimit.IsXLimited())
>> 196 {
>> 197 if ( (xMin>pVoxelLimit.GetMaxXExtent()+kCarTolerance)
>> 198 || (xMax<pVoxelLimit.GetMinXExtent()-kCarTolerance) )
>> 199 {
>> 200 return false;
>> 201 }
>> 202 else
>> 203 {
>> 204 if (xMin<pVoxelLimit.GetMinXExtent())
>> 205 {
>> 206 xMin=pVoxelLimit.GetMinXExtent();
>> 207 }
>> 208 if (xMax>pVoxelLimit.GetMaxXExtent())
>> 209 {
>> 210 xMax=pVoxelLimit.GetMaxXExtent();
>> 211 }
>> 212 }
>> 213 }
188 214
189 // Check cuts << 215 yoffset=pTransform.NetTranslation().y();
190 // << 216 yMin=yoffset - ySemiAxis;
191 if (fZBottomCut == 0. && fZTopCut == 0.) << 217 yMax=yoffset + ySemiAxis;
192 { << 218 if (pVoxelLimit.IsYLimited())
193 fZBottomCut = -C; << 219 {
194 fZTopCut = C; << 220 if ( (yMin>pVoxelLimit.GetMaxYExtent()+kCarTolerance)
195 } << 221 || (yMax<pVoxelLimit.GetMinYExtent()-kCarTolerance) )
196 if (fZBottomCut >= C || fZTopCut <= -C || fZ << 222 {
197 { << 223 return false;
198 std::ostringstream message; << 224 }
199 message << "Invalid Z cuts for Solid: " << 225 else
200 << GetName() << "\n" << 226 {
201 << " bottom cut: " << fZBottomCut << 227 if (yMin<pVoxelLimit.GetMinYExtent())
202 << " top cut: " << fZTopCut; << 228 {
203 G4Exception("G4Ellipsoid::CheckParameters( << 229 yMin=pVoxelLimit.GetMinYExtent();
204 FatalException, message); << 230 }
>> 231 if (yMax>pVoxelLimit.GetMaxYExtent())
>> 232 {
>> 233 yMax=pVoxelLimit.GetMaxYExtent();
>> 234 }
>> 235 }
>> 236 }
205 237
206 } << 238 zoffset=pTransform.NetTranslation().z();
207 fZBottomCut = std::max(fZBottomCut, -C); << 239 zMin=zoffset + (-zSemiAxis > zBottomCut ? -zSemiAxis : zBottomCut);
208 fZTopCut = std::min(fZTopCut, C); << 240 zMax=zoffset + ( zSemiAxis < zTopCut ? zSemiAxis : zTopCut);
>> 241 if (pVoxelLimit.IsZLimited())
>> 242 {
>> 243 if ( (zMin>pVoxelLimit.GetMaxZExtent()+kCarTolerance)
>> 244 || (zMax<pVoxelLimit.GetMinZExtent()-kCarTolerance) )
>> 245 {
>> 246 return false;
>> 247 }
>> 248 else
>> 249 {
>> 250 if (zMin<pVoxelLimit.GetMinZExtent())
>> 251 {
>> 252 zMin=pVoxelLimit.GetMinZExtent();
>> 253 }
>> 254 if (zMax>pVoxelLimit.GetMaxZExtent())
>> 255 {
>> 256 zMax=pVoxelLimit.GetMaxZExtent();
>> 257 }
>> 258 }
>> 259 }
209 260
210 // Set extent in x and y << 261 // if here, then known to cut bounding box around ellipsoid
211 fXmax = A; << 262 //
212 fYmax = B; << 263 xoff = (xoffset < xMin) ? (xMin-xoffset)
213 if (fZBottomCut > 0.) << 264 : (xoffset > xMax) ? (xoffset-xMax) : 0.0;
214 { << 265 yoff = (yoffset < yMin) ? (yMin-yoffset)
215 G4double ratio = fZBottomCut / C; << 266 : (yoffset > yMax) ? (yoffset-yMax) : 0.0;
216 G4double scale = std::sqrt((1. - ratio) * << 267
217 fXmax *= scale; << 268 // detailed calculations
218 fYmax *= scale; << 269 // NOTE: does not use X or Y offsets to adjust Z range,
>> 270 // and does not use Z offset to adjust X or Y range,
>> 271 // which is consistent with G4Sphere::CalculateExtent behavior
>> 272 //
>> 273 switch (pAxis)
>> 274 {
>> 275 case kXAxis:
>> 276 if (yoff==0.)
>> 277 {
>> 278 // YZ limits cross max/min x => no change
>> 279 //
>> 280 pMin=xMin;
>> 281 pMax=xMax;
>> 282 }
>> 283 else
>> 284 {
>> 285 // YZ limits don't cross max/min x => compute max delta x,
>> 286 // hence new mins/maxs
>> 287 //
>> 288 maxDiff= 1.0-sqr(yoff/ySemiAxis);
>> 289 if (maxDiff < 0.0) { return false; }
>> 290 maxDiff= xSemiAxis * std::sqrt(maxDiff);
>> 291 newMin=xoffset-maxDiff;
>> 292 newMax=xoffset+maxDiff;
>> 293 pMin=(newMin<xMin) ? xMin : newMin;
>> 294 pMax=(newMax>xMax) ? xMax : newMax;
>> 295 }
>> 296 break;
>> 297 case kYAxis:
>> 298 if (xoff==0.)
>> 299 {
>> 300 // XZ limits cross max/min y => no change
>> 301 //
>> 302 pMin=yMin;
>> 303 pMax=yMax;
>> 304 }
>> 305 else
>> 306 {
>> 307 // XZ limits don't cross max/min y => compute max delta y,
>> 308 // hence new mins/maxs
>> 309 //
>> 310 maxDiff= 1.0-sqr(xoff/xSemiAxis);
>> 311 if (maxDiff < 0.0) { return false; }
>> 312 maxDiff= ySemiAxis * std::sqrt(maxDiff);
>> 313 newMin=yoffset-maxDiff;
>> 314 newMax=yoffset+maxDiff;
>> 315 pMin=(newMin<yMin) ? yMin : newMin;
>> 316 pMax=(newMax>yMax) ? yMax : newMax;
>> 317 }
>> 318 break;
>> 319 case kZAxis:
>> 320 pMin=zMin;
>> 321 pMax=zMax;
>> 322 break;
>> 323 default:
>> 324 break;
>> 325 }
>> 326
>> 327 pMin-=kCarTolerance;
>> 328 pMax+=kCarTolerance;
>> 329 return true;
219 } 330 }
220 if (fZTopCut < 0.) << 331 else // not rotated
221 { 332 {
222 G4double ratio = fZTopCut / C; << 333 G4int i,j,noEntries,noBetweenSections;
223 G4double scale = std::sqrt((1. - ratio) * << 334 G4bool existsAfterClip=false;
224 fXmax *= scale; <<
225 fYmax *= scale; <<
226 } <<
227 <<
228 // Set scale factors <<
229 fRsph = std::max(std::max(A, B), C); // boun <<
230 fR = std::min(std::min(A, B), C); // radi <<
231 fSx = fR / A; // X scale factor <<
232 fSy = fR / B; // Y scale factor <<
233 fSz = fR / C; // Z scale factor <<
234 <<
235 // Scaled cuts <<
236 fZMidCut = 0.5 * (fZTopCut + fZBottomCut) * <<
237 fZDimCut = 0.5 * (fZTopCut - fZBottomCut) * <<
238 335
239 // Coefficients for approximation of distanc << 336 // Calculate rotated vertex coordinates
240 fQ1 = 0.5 / fR; <<
241 fQ2 = 0.5 * fR + halfTolerance * halfToleran <<
242 <<
243 fCubicVolume = 0.; // volume <<
244 fSurfaceArea = 0.; // surface area <<
245 fLateralArea = 0.; // lateral surface area <<
246 } <<
247 <<
248 ////////////////////////////////////////////// <<
249 // <<
250 // Dispatch to parameterisation for replicatio <<
251 // computation & modification <<
252 337
253 void G4Ellipsoid::ComputeDimensions(G4VPVParam << 338 G4int noPolygonVertices=0;
254 const G4in << 339 G4ThreeVectorList* vertices =
255 const G4VP << 340 CreateRotatedVertices(pTransform,noPolygonVertices);
256 { << 341
257 p->ComputeDimensions(*this,n,pRep); << 342 pMin=+kInfinity;
258 } << 343 pMax=-kInfinity;
>> 344
>> 345 noEntries=vertices->size(); // noPolygonVertices*noPhiCrossSections
>> 346 noBetweenSections=noEntries-noPolygonVertices;
>> 347
>> 348 G4ThreeVectorList ThetaPolygon;
>> 349 for (i=0;i<noEntries;i+=noPolygonVertices)
>> 350 {
>> 351 for(j=0;j<(noPolygonVertices/2)-1;j++)
>> 352 {
>> 353 ThetaPolygon.push_back((*vertices)[i+j]);
>> 354 ThetaPolygon.push_back((*vertices)[i+j+1]);
>> 355 ThetaPolygon.push_back((*vertices)[i+noPolygonVertices-2-j]);
>> 356 ThetaPolygon.push_back((*vertices)[i+noPolygonVertices-1-j]);
>> 357 CalculateClippedPolygonExtent(ThetaPolygon,pVoxelLimit,pAxis,pMin,pMax);
>> 358 ThetaPolygon.clear();
>> 359 }
>> 360 }
>> 361 for (i=0;i<noBetweenSections;i+=noPolygonVertices)
>> 362 {
>> 363 for(j=0;j<noPolygonVertices-1;j++)
>> 364 {
>> 365 ThetaPolygon.push_back((*vertices)[i+j]);
>> 366 ThetaPolygon.push_back((*vertices)[i+j+1]);
>> 367 ThetaPolygon.push_back((*vertices)[i+noPolygonVertices+j+1]);
>> 368 ThetaPolygon.push_back((*vertices)[i+noPolygonVertices+j]);
>> 369 CalculateClippedPolygonExtent(ThetaPolygon,pVoxelLimit,pAxis,pMin,pMax);
>> 370 ThetaPolygon.clear();
>> 371 }
>> 372 ThetaPolygon.push_back((*vertices)[i+noPolygonVertices-1]);
>> 373 ThetaPolygon.push_back((*vertices)[i]);
>> 374 ThetaPolygon.push_back((*vertices)[i+noPolygonVertices]);
>> 375 ThetaPolygon.push_back((*vertices)[i+2*noPolygonVertices-1]);
>> 376 CalculateClippedPolygonExtent(ThetaPolygon,pVoxelLimit,pAxis,pMin,pMax);
>> 377 ThetaPolygon.clear();
>> 378 }
>> 379 if ( (pMin!=kInfinity) || (pMax!=-kInfinity) )
>> 380 {
>> 381 existsAfterClip=true;
>> 382
>> 383 // Add 2*tolerance to avoid precision troubles
>> 384 //
>> 385 pMin-=kCarTolerance;
>> 386 pMax+=kCarTolerance;
259 387
260 ////////////////////////////////////////////// << 388 }
261 // << 389 else
262 // Get bounding box << 390 {
>> 391 // Check for case where completely enveloping clipping volume
>> 392 // If point inside then we are confident that the solid completely
>> 393 // envelopes the clipping volume. Hence set min/max extents according
>> 394 // to clipping volume extents along the specified axis.
>> 395 //
>> 396 G4ThreeVector
>> 397 clipCentre((pVoxelLimit.GetMinXExtent()+pVoxelLimit.GetMaxXExtent())*0.5,
>> 398 (pVoxelLimit.GetMinYExtent()+pVoxelLimit.GetMaxYExtent())*0.5,
>> 399 (pVoxelLimit.GetMinZExtent()+pVoxelLimit.GetMaxZExtent())*0.5);
263 400
264 void G4Ellipsoid::BoundingLimits(G4ThreeVector << 401 if (Inside(pTransform.Inverse().TransformPoint(clipCentre))!=kOutside)
265 G4ThreeVector << 402 {
266 { << 403 existsAfterClip=true;
267 pMin.set(-fXmax,-fYmax, fZBottomCut); << 404 pMin=pVoxelLimit.GetMinExtent(pAxis);
268 pMax.set( fXmax, fYmax, fZTopCut); << 405 pMax=pVoxelLimit.GetMaxExtent(pAxis);
>> 406 }
>> 407 }
>> 408 delete vertices;
>> 409 return existsAfterClip;
>> 410 }
269 } 411 }
270 412
271 ////////////////////////////////////////////// << 413 ///////////////////////////////////////////////////////////////////////////////
272 // 414 //
273 // Calculate extent under transform and specif << 415 // Return whether point inside/outside/on surface
>> 416 // Split into radius, phi, theta checks
>> 417 // Each check modifies `in', or returns as approprate
274 418
275 G4bool << 419 EInside G4Ellipsoid::Inside(const G4ThreeVector& p) const
276 G4Ellipsoid::CalculateExtent(const EAxis pAxis <<
277 const G4VoxelLimi <<
278 const G4AffineTra <<
279 G4double& p <<
280 { 420 {
281 G4ThreeVector bmin, bmax; << 421 G4double rad2oo, // outside surface outer tolerance
>> 422 rad2oi; // outside surface inner tolerance
>> 423 EInside in;
282 424
283 // Get bounding box << 425 static const G4double halfRadTolerance=kRadTolerance*0.5;
284 BoundingLimits(bmin,bmax); <<
285 426
286 // Find extent << 427 // check this side of z cut first, because that's fast
287 G4BoundingEnvelope bbox(bmin,bmax); << 428 //
288 return bbox.CalculateExtent(pAxis,pVoxelLimi << 429 if (p.z() < zBottomCut-halfRadTolerance) { return in=kOutside; }
289 } << 430 if (p.z() > zTopCut+halfRadTolerance) { return in=kOutside; }
290 431
291 ////////////////////////////////////////////// << 432 rad2oo= sqr(p.x()/(xSemiAxis+halfRadTolerance))
292 // << 433 + sqr(p.y()/(ySemiAxis+halfRadTolerance))
293 // Return position of point: inside/outside/on << 434 + sqr(p.z()/(zSemiAxis+halfRadTolerance));
>> 435
>> 436 if (rad2oo > 1.0) { return in=kOutside; }
>> 437
>> 438 rad2oi= sqr(p.x()*(1.0+halfRadTolerance/xSemiAxis)/xSemiAxis)
>> 439 + sqr(p.y()*(1.0+halfRadTolerance/ySemiAxis)/ySemiAxis)
>> 440 + sqr(p.z()*(1.0+halfRadTolerance/zSemiAxis)/zSemiAxis);
294 441
295 EInside G4Ellipsoid::Inside(const G4ThreeVecto << 442 // Check radial surfaces
296 { << 443 // sets `in' (already checked for rad2oo > 1.0)
297 G4double x = p.x() * fSx; << 444 //
298 G4double y = p.y() * fSy; << 445 if (rad2oi < 1.0)
299 G4double z = p.z() * fSz; << 446 {
300 G4double rr = x * x + y * y + z * z; << 447 in = ( (p.z() < zBottomCut+halfRadTolerance)
301 G4double distZ = std::abs(z - fZMidCut) - fZ << 448 || (p.z() > zTopCut-halfRadTolerance) ) ? kSurface : kInside;
302 G4double distR = fQ1 * rr - fQ2; << 449 if ( rad2oi > 1.0-halfRadTolerance ) { in=kSurface; }
303 G4double dist = std::max(distZ, distR); << 450 }
>> 451 else
>> 452 {
>> 453 in = kSurface;
>> 454 }
>> 455 return in;
304 456
305 if (dist > halfTolerance) return kOutside; <<
306 return (dist > -halfTolerance) ? kSurface : <<
307 } 457 }
308 458
309 ////////////////////////////////////////////// << 459 ///////////////////////////////////////////////////////////////////////////////
310 // 460 //
311 // Return unit normal to surface at p << 461 // Return unit normal of surface closest to p not protected against p=0
312 462
313 G4ThreeVector G4Ellipsoid::SurfaceNormal( cons 463 G4ThreeVector G4Ellipsoid::SurfaceNormal( const G4ThreeVector& p) const
314 { 464 {
315 G4ThreeVector norm(0., 0., 0.); << 465 G4double distR, distZBottom, distZTop;
316 G4int nsurf = 0; <<
317 466
318 // Check cuts << 467 // normal vector with special magnitude: parallel to normal, units 1/length
319 G4double x = p.x() * fSx; << 468 // norm*p == 1.0 if on surface, >1.0 if outside, <1.0 if inside
320 G4double y = p.y() * fSy; << 469 //
321 G4double z = p.z() * fSz; << 470 G4ThreeVector norm(p.x()/(xSemiAxis*xSemiAxis),
322 G4double distZ = std::abs(z - fZMidCut) - fZ << 471 p.y()/(ySemiAxis*ySemiAxis),
323 if (std::abs(distZ) <= halfTolerance) << 472 p.z()/(zSemiAxis*zSemiAxis));
324 { << 473 G4double radius = 1.0/norm.mag();
325 norm.setZ(std::copysign(1., z - fZMidCut)) <<
326 ++nsurf; <<
327 } <<
328 474
329 // Check lateral surface << 475 // approximate distance to curved surface
330 G4double distR = fQ1*(x*x + y*y + z*z) - fQ2 << 476 //
331 if (std::abs(distR) <= halfTolerance) << 477 distR = std::fabs( (p*norm - 1.0) * radius ) / 2.0;
332 { <<
333 // normal = (p.x/a^2, p.y/b^2, p.z/c^2) <<
334 norm += G4ThreeVector(x*fSx, y*fSy, z*fSz) <<
335 ++nsurf; <<
336 } <<
337 478
338 // Return normal << 479 // Distance to z-cut plane
339 if (nsurf == 1) return norm; << 480 //
340 else if (nsurf > 1) return norm.unit(); // e << 481 distZBottom = std::fabs( p.z() - zBottomCut );
341 else << 482 distZTop = std::fabs( p.z() - zTopCut );
>> 483
>> 484 if ( (distZBottom < distR) || (distZTop < distR) )
342 { 485 {
343 #ifdef G4SPECSDEBUG << 486 return G4ThreeVector(0.,0.,(distZBottom < distZTop) ? -1.0 : 1.0);
344 std::ostringstream message; <<
345 G4long oldprc = message.precision(16); <<
346 message << "Point p is not on surface (!?) <<
347 << GetName() << "\n"; <<
348 message << "Position:\n"; <<
349 message << " p.x() = " << p.x()/mm << " <<
350 message << " p.y() = " << p.y()/mm << " <<
351 message << " p.z() = " << p.z()/mm << " <<
352 G4cout.precision(oldprc); <<
353 G4Exception("G4Ellipsoid::SurfaceNormal(p) <<
354 JustWarning, message ); <<
355 DumpInfo(); <<
356 #endif <<
357 return ApproxSurfaceNormal(p); <<
358 } 487 }
>> 488 return ( norm *= radius );
359 } 489 }
360 490
361 ////////////////////////////////////////////// << 491 ///////////////////////////////////////////////////////////////////////////////
362 // 492 //
363 // Find surface nearest to point and return co << 493 // Calculate distance to shape from outside, along normalised vector
364 // This method normally should not be called. << 494 // - return kInfinity if no intersection, or intersection distance <= tolerance
365 <<
366 G4ThreeVector G4Ellipsoid::ApproxSurfaceNormal <<
367 { <<
368 G4double x = p.x() * fSx; <<
369 G4double y = p.y() * fSy; <<
370 G4double z = p.z() * fSz; <<
371 G4double rr = x * x + y * y + z * z; <<
372 G4double distZ = std::abs(z - fZMidCut) - fZ <<
373 G4double distR = std::sqrt(rr) - fR; <<
374 if (distR > distZ && rr > 0.) // distR > di <<
375 return G4ThreeVector(x*fSx, y*fSy, z*fSz). <<
376 else <<
377 return { 0., 0., std::copysign(1., z - fZM <<
378 } <<
379 <<
380 ////////////////////////////////////////////// <<
381 // 495 //
382 // Calculate distance to shape from outside al <<
383 496
384 G4double G4Ellipsoid::DistanceToIn(const G4Thr << 497 G4double G4Ellipsoid::DistanceToIn( const G4ThreeVector& p,
385 const G4Thr << 498 const G4ThreeVector& v ) const
386 { 499 {
387 G4double offset = 0.; << 500 static const G4double halfCarTolerance=kCarTolerance*0.5;
388 G4ThreeVector pcur = p; << 501 static const G4double halfRadTolerance=kRadTolerance*0.5;
389 502
390 // Check if point is flying away, relative t << 503 G4double distMin = std::min(xSemiAxis,ySemiAxis);
391 // << 504 const G4double dRmax = 100.*std::min(distMin,zSemiAxis);
392 G4double safex = std::abs(p.x()) - fXmax; << 505 distMin= kInfinity;
393 G4double safey = std::abs(p.y()) - fYmax; <<
394 G4double safet = p.z() - fZTopCut; <<
395 G4double safeb = fZBottomCut - p.z(); <<
396 506
397 if (safex >= -halfTolerance && p.x() * v.x() << 507 // check to see if Z plane is relevant
398 if (safey >= -halfTolerance && p.y() * v.y() << 508 if (p.z() <= zBottomCut+halfCarTolerance)
399 if (safet >= -halfTolerance && v.z() >= 0.) << 509 {
400 if (safeb >= -halfTolerance && v.z() <= 0.) << 510 if (v.z() <= 0.0) { return distMin; }
>> 511 G4double distZ = (zBottomCut - p.z()) / v.z();
401 512
402 // Relocate point, if required << 513 if ( (distZ > -halfRadTolerance) && (Inside(p+distZ*v) != kOutside) )
403 // << 514 {
404 G4double safe = std::max(std::max(std::max(s << 515 // early exit since can't intercept curved surface if we reach here
405 if (safe > 32. * fRsph) << 516 if ( std::fabs(distZ) < halfRadTolerance ) { distZ=0.; }
>> 517 return distMin= distZ;
>> 518 }
>> 519 }
>> 520 if (p.z() >= zTopCut-halfCarTolerance)
406 { 521 {
407 offset = (1. - 1.e-08) * safe - 2. * fRsph << 522 if (v.z() >= 0.0) { return distMin;}
408 pcur += offset * v; << 523 G4double distZ = (zTopCut - p.z()) / v.z();
409 G4double dist = DistanceToIn(pcur, v); << 524 if ( (distZ > -halfRadTolerance) && (Inside(p+distZ*v) != kOutside) )
410 return (dist == kInfinity) ? kInfinity : d << 525 {
>> 526 // early exit since can't intercept curved surface if we reach here
>> 527 if ( std::fabs(distZ) < halfRadTolerance ) { distZ=0.; }
>> 528 return distMin= distZ;
>> 529 }
411 } 530 }
>> 531 // if fZCut1 <= p.z() <= fZCut2, then must hit curved surface
412 532
413 // Scale ellipsoid to sphere << 533 // now check curved surface intercept
414 // << 534 G4double A,B,C;
415 G4double px = pcur.x() * fSx; <<
416 G4double py = pcur.y() * fSy; <<
417 G4double pz = pcur.z() * fSz; <<
418 G4double vx = v.x() * fSx; <<
419 G4double vy = v.y() * fSy; <<
420 G4double vz = v.z() * fSz; <<
421 535
422 // Check if point is leaving the solid << 536 A= sqr(v.x()/xSemiAxis) + sqr(v.y()/ySemiAxis) + sqr(v.z()/zSemiAxis);
423 // << 537 C= sqr(p.x()/xSemiAxis) + sqr(p.y()/ySemiAxis) + sqr(p.z()/zSemiAxis) - 1.0;
424 G4double dzcut = fZDimCut; << 538 B= 2.0 * ( p.x()*v.x()/(xSemiAxis*xSemiAxis)
425 G4double pzcut = pz - fZMidCut; << 539 + p.y()*v.y()/(ySemiAxis*ySemiAxis)
426 G4double distZ = std::abs(pzcut) - dzcut; << 540 + p.z()*v.z()/(zSemiAxis*zSemiAxis) );
427 if (distZ >= -halfTolerance && pzcut * vz >= << 541
>> 542 C= B*B - 4.0*A*C;
>> 543 if (C > 0.0)
>> 544 {
>> 545 G4double distR= (-B - std::sqrt(C)) / (2.0*A);
>> 546 G4double intZ = p.z()+distR*v.z();
>> 547 if ( (distR > halfRadTolerance)
>> 548 && (intZ >= zBottomCut-halfRadTolerance)
>> 549 && (intZ <= zTopCut+halfRadTolerance) )
>> 550 {
>> 551 distMin = distR;
>> 552 }
>> 553 else if( (distR >- halfRadTolerance)
>> 554 && (intZ >= zBottomCut-halfRadTolerance)
>> 555 && (intZ <= zTopCut+halfRadTolerance) )
>> 556 {
>> 557 // p is on the curved surface, DistanceToIn returns 0 or kInfinity:
>> 558 // DistanceToIn returns 0, if second root is positive (means going inside)
>> 559 // If second root is negative, DistanceToIn returns kInfinity (outside)
>> 560 //
>> 561 distR = (-B + std::sqrt(C) ) / (2.0*A);
>> 562 if(distR>0.) { distMin=0.; }
>> 563 }
>> 564 else
>> 565 {
>> 566 distR= (-B + std::sqrt(C)) / (2.0*A);
>> 567 intZ = p.z()+distR*v.z();
>> 568 if ( (distR > halfRadTolerance)
>> 569 && (intZ >= zBottomCut-halfRadTolerance)
>> 570 && (intZ <= zTopCut+halfRadTolerance) )
>> 571 {
>> 572 G4ThreeVector norm=SurfaceNormal(p);
>> 573 if (norm.dot(v)<0.) { distMin = distR; }
>> 574 }
>> 575 }
>> 576 if ( (distMin!=kInfinity) && (distMin>dRmax) )
>> 577 { // Avoid rounding errors due to precision issues on
>> 578 // 64 bits systems. Split long distances and recompute
>> 579 G4double fTerm = distMin-std::fmod(distMin,dRmax);
>> 580 distMin = fTerm + DistanceToIn(p+fTerm*v,v);
>> 581 }
>> 582 }
>> 583
>> 584 if (std::fabs(distMin)<halfRadTolerance) { distMin=0.; }
>> 585 return distMin;
>> 586 }
428 587
429 G4double rr = px * px + py * py + pz * pz; << 588 ///////////////////////////////////////////////////////////////////////////////
430 G4double pv = px * vx + py * vy + pz * vz; << 589 //
431 G4double distR = fQ1 * rr - fQ2; << 590 // Calculate distance (<= actual) to closest surface of shape from outside
432 if (distR >= -halfTolerance && pv >= 0.) ret << 591 // - Return 0 if point inside
433 592
434 G4double A = vx * vx + vy * vy + vz * vz; << 593 G4double G4Ellipsoid::DistanceToIn(const G4ThreeVector& p) const
435 G4double B = pv; << 594 {
436 G4double C = rr - fR * fR; << 595 G4double distR, distZ;
437 G4double D = B * B - A * C; <<
438 // scratch^2 = R^2 - (R - halfTolerance)^2 = <<
439 G4double EPS = A * A * fR * kCarTolerance; / <<
440 if (D <= EPS) return kInfinity; // no inters <<
441 596
442 // Find intersection with Z planes << 597 // normal vector: parallel to normal, magnitude 1/(characteristic radius)
443 // 598 //
444 G4double invz = (vz == 0) ? DBL_MAX : -1./v << 599 G4ThreeVector norm(p.x()/(xSemiAxis*xSemiAxis),
445 G4double dz = std::copysign(dzcut, invz); << 600 p.y()/(ySemiAxis*ySemiAxis),
446 G4double tzmin = (pzcut - dz) * invz; << 601 p.z()/(zSemiAxis*zSemiAxis));
447 G4double tzmax = (pzcut + dz) * invz; << 602 G4double radius= 1.0/norm.mag();
448 603
449 // Find intersection with lateral surface << 604 // approximate distance to curved surface ( <= actual distance )
450 // 605 //
451 G4double tmp = -B - std::copysign(std::sqrt( << 606 distR= (p*norm - 1.0) * radius / 2.0;
452 G4double t1 = tmp / A; <<
453 G4double t2 = C / tmp; <<
454 G4double trmin = std::min(t1, t2); <<
455 G4double trmax = std::max(t1, t2); <<
456 607
457 // Return distance << 608 // Distance to z-cut plane
458 // 609 //
459 G4double tmin = std::max(tzmin, trmin); << 610 distZ= zBottomCut - p.z();
460 G4double tmax = std::min(tzmax, trmax); << 611 if (distZ < 0.0)
461 << 612 {
462 if (tmax - tmin <= halfTolerance) return kIn << 613 distZ = p.z() - zTopCut;
463 return (tmin < halfTolerance) ? offset : tmi << 614 }
464 } <<
465 <<
466 ////////////////////////////////////////////// <<
467 // <<
468 // Estimate distance to surface from outside <<
469 615
470 G4double G4Ellipsoid::DistanceToIn(const G4Thr << 616 // Distance to closest surface from outside
471 { << 617 //
472 G4double px = p.x(); << 618 if (distZ < 0.0)
473 G4double py = p.y(); << 619 {
474 G4double pz = p.z(); << 620 return (distR < 0.0) ? 0.0 : distR;
475 << 621 }
476 // Safety distance to bounding box << 622 else if (distR < 0.0)
477 G4double distX = std::abs(px) - fXmax; << 623 {
478 G4double distY = std::abs(py) - fYmax; << 624 return distZ;
479 G4double distZ = std::max(pz - fZTopCut, fZB << 625 }
480 G4double distB = std::max(std::max(distX, di << 626 else
481 << 627 {
482 // Safety distance to lateral surface << 628 return (distZ < distR) ? distZ : distR;
483 G4double x = px * fSx; << 629 }
484 G4double y = py * fSy; <<
485 G4double z = pz * fSz; <<
486 G4double distR = std::sqrt(x*x + y*y + z*z) <<
487 <<
488 // Return safety to in <<
489 G4double dist = std::max(distB, distR); <<
490 return (dist < 0.) ? 0. : dist; <<
491 } 630 }
492 631
493 ////////////////////////////////////////////// << 632 ///////////////////////////////////////////////////////////////////////////////
494 // 633 //
495 // Calculate distance to surface from inside a << 634 // Calculate distance to surface of shape from `inside', allowing for tolerance
496 635
497 G4double G4Ellipsoid::DistanceToOut(const G4Th 636 G4double G4Ellipsoid::DistanceToOut(const G4ThreeVector& p,
498 const G4Th 637 const G4ThreeVector& v,
499 const G4bo 638 const G4bool calcNorm,
500 G4bo << 639 G4bool *validNorm,
501 G4Th << 640 G4ThreeVector *n ) const
502 { 641 {
503 // Check if point flying away relative to Z << 642 G4double distMin;
>> 643 enum surface_e {kPlaneSurf, kCurvedSurf, kNoSurf} surface;
>> 644
>> 645 distMin= kInfinity;
>> 646 surface= kNoSurf;
>> 647
>> 648 // check to see if Z plane is relevant
504 // 649 //
505 G4double pz = p.z() * fSz; << 650 if (v.z() < 0.0)
506 G4double vz = v.z() * fSz; <<
507 G4double dzcut = fZDimCut; <<
508 G4double pzcut = pz - fZMidCut; <<
509 G4double distZ = std::abs(pzcut) - dzcut; <<
510 if (distZ >= -halfTolerance && pzcut * vz > <<
511 { 651 {
512 if (calcNorm) << 652 G4double distZ = (zBottomCut - p.z()) / v.z();
>> 653 if (distZ < 0.0)
513 { 654 {
514 *validNorm = true; << 655 distZ= 0.0;
515 n->set(0., 0., std::copysign(1., pzcut)) << 656 if (!calcNorm) {return 0.0;}
516 } 657 }
517 return 0.; << 658 distMin= distZ;
>> 659 surface= kPlaneSurf;
518 } 660 }
519 << 661 if (v.z() > 0.0)
520 // Check if point is flying away relative to <<
521 // <<
522 G4double px = p.x() * fSx; <<
523 G4double py = p.y() * fSy; <<
524 G4double vx = v.x() * fSx; <<
525 G4double vy = v.y() * fSy; <<
526 G4double rr = px * px + py * py + pz * pz; <<
527 G4double pv = px * vx + py * vy + pz * vz; <<
528 G4double distR = fQ1 * rr - fQ2; <<
529 if (distR >= -halfTolerance && pv > 0.) <<
530 { 662 {
531 if (calcNorm) << 663 G4double distZ = (zTopCut - p.z()) / v.z();
>> 664 if (distZ < 0.0)
532 { 665 {
533 *validNorm = true; << 666 distZ= 0.0;
534 *n = G4ThreeVector(px*fSx, py*fSy, pz*fS << 667 if (!calcNorm) {return 0.0;}
535 } 668 }
536 return 0.; << 669 distMin= distZ;
>> 670 surface= kPlaneSurf;
537 } 671 }
538 672
539 // Just in case check if point is outside (n << 673 // normal vector: parallel to normal, magnitude 1/(characteristic radius)
>> 674 //
>> 675 G4ThreeVector nearnorm(p.x()/(xSemiAxis*xSemiAxis),
>> 676 p.y()/(ySemiAxis*ySemiAxis),
>> 677 p.z()/(zSemiAxis*zSemiAxis));
>> 678
>> 679 // now check curved surface intercept
540 // 680 //
541 if (std::max(distZ, distR) > halfTolerance) << 681 G4double A,B,C;
>> 682
>> 683 A= sqr(v.x()/xSemiAxis) + sqr(v.y()/ySemiAxis) + sqr(v.z()/zSemiAxis);
>> 684 C= (p * nearnorm) - 1.0;
>> 685 B= 2.0 * (v * nearnorm);
>> 686
>> 687 C= B*B - 4.0*A*C;
>> 688 if (C > 0.0)
542 { 689 {
543 #ifdef G4SPECSDEBUG << 690 G4double distR= (-B + std::sqrt(C) ) / (2.0*A);
544 std::ostringstream message; << 691 if (distR < 0.0)
545 G4long oldprc = message.precision(16); <<
546 message << "Point p is outside (!?) of sol <<
547 << GetName() << G4endl; <<
548 message << "Position: " << p << G4endl;; <<
549 message << "Direction: " << v; <<
550 G4cout.precision(oldprc); <<
551 G4Exception("G4Ellipsoid::DistanceToOut(p, <<
552 JustWarning, message ); <<
553 DumpInfo(); <<
554 #endif <<
555 if (calcNorm) <<
556 { 692 {
557 *validNorm = true; << 693 distR= 0.0;
558 *n = ApproxSurfaceNormal(p); << 694 if (!calcNorm) {return 0.0;}
>> 695 }
>> 696 if (distR < distMin)
>> 697 {
>> 698 distMin= distR;
>> 699 surface= kCurvedSurf;
559 } 700 }
560 return 0.; <<
561 } 701 }
562 702
563 // Set coefficients of quadratic equation: A << 703 // set normal if requested
564 // 704 //
565 G4double A = vx * vx + vy * vy + vz * vz; << 705 if (calcNorm)
566 G4double B = pv; <<
567 G4double C = rr - fR * fR; <<
568 G4double D = B * B - A * C; <<
569 // It is expected that the point is located <<
570 // max term in the expression for discrimina <<
571 // max calculation error can be derived as f <<
572 // A * (1 + 2e) * R^2 * (1 + 2e) = A * R^2 + <<
573 G4double EPS = 4. * A * fR * fR * DBL_EPSILO <<
574 <<
575 if (D <= EPS) // no intersection <<
576 { 706 {
577 if (calcNorm) << 707 if (surface == kNoSurf)
>> 708 {
>> 709 *validNorm = false;
>> 710 }
>> 711 else
578 { 712 {
579 *validNorm = true; 713 *validNorm = true;
580 *n = G4ThreeVector(px*fSx, py*fSy, pz*fS << 714 switch (surface)
>> 715 {
>> 716 case kPlaneSurf:
>> 717 *n= G4ThreeVector(0.,0.,(v.z() > 0.0 ? 1. : -1.));
>> 718 break;
>> 719 case kCurvedSurf:
>> 720 {
>> 721 G4ThreeVector pexit= p + distMin*v;
>> 722 G4ThreeVector truenorm(pexit.x()/(xSemiAxis*xSemiAxis),
>> 723 pexit.y()/(ySemiAxis*ySemiAxis),
>> 724 pexit.z()/(zSemiAxis*zSemiAxis));
>> 725 truenorm *= 1.0/truenorm.mag();
>> 726 *n= truenorm;
>> 727 } break;
>> 728 default: // Should never reach this case ...
>> 729 G4int oldprc = G4cout.precision(16);
>> 730 G4cout << G4endl;
>> 731 DumpInfo();
>> 732 G4cout << "Position:" << G4endl << G4endl;
>> 733 G4cout << "p.x() = " << p.x()/mm << " mm" << G4endl;
>> 734 G4cout << "p.y() = " << p.y()/mm << " mm" << G4endl;
>> 735 G4cout << "p.z() = " << p.z()/mm << " mm" << G4endl << G4endl;
>> 736 G4cout << "Direction:" << G4endl << G4endl;
>> 737 G4cout << "v.x() = " << v.x() << G4endl;
>> 738 G4cout << "v.y() = " << v.y() << G4endl;
>> 739 G4cout << "v.z() = " << v.z() << G4endl << G4endl;
>> 740 G4cout << "Proposed distance :" << G4endl << G4endl;
>> 741 G4cout << "distMin = " << distMin/mm << " mm" << G4endl << G4endl;
>> 742 G4cout.precision(oldprc);
>> 743 G4Exception("G4Ellipsoid::DistanceToOut(p,v,..)",
>> 744 "Notification", JustWarning,
>> 745 "Undefined side for valid surface normal to solid.");
>> 746 break;
>> 747 }
581 } 748 }
582 return 0.; <<
583 } 749 }
>> 750
>> 751 return distMin;
>> 752 }
>> 753
>> 754 ///////////////////////////////////////////////////////////////////////////////
>> 755 //
>> 756 // Calculate distance (<=actual) to closest surface of shape from inside
>> 757
>> 758 G4double G4Ellipsoid::DistanceToOut(const G4ThreeVector& p) const
>> 759 {
>> 760 G4double distR, distZ;
>> 761
>> 762 #ifdef G4SPECSDEBUG
>> 763 if( Inside(p) == kOutside )
>> 764 {
>> 765 G4int oldprc = G4cout.precision(16) ;
>> 766 G4cout << G4endl ;
>> 767 DumpInfo();
>> 768 G4cout << "Position:" << G4endl << G4endl ;
>> 769 G4cout << "p.x() = " << p.x()/mm << " mm" << G4endl ;
>> 770 G4cout << "p.y() = " << p.y()/mm << " mm" << G4endl ;
>> 771 G4cout << "p.z() = " << p.z()/mm << " mm" << G4endl << G4endl ;
>> 772 G4cout.precision(oldprc) ;
>> 773 G4Exception("G4Ellipsoid::DistanceToOut(p)", "Notification", JustWarning,
>> 774 "Point p is outside !?" );
>> 775 }
>> 776 #endif
584 777
585 // Find intersection with Z cuts << 778 // Normal vector: parallel to normal, magnitude 1/(characteristic radius)
586 // 779 //
587 G4double tzmax = (vz == 0.) ? DBL_MAX : (std << 780 G4ThreeVector norm(p.x()/(xSemiAxis*xSemiAxis),
>> 781 p.y()/(ySemiAxis*ySemiAxis),
>> 782 p.z()/(zSemiAxis*zSemiAxis));
588 783
589 // Find intersection with lateral surface << 784 // the following is a safe inlined "radius= min(1.0/norm.mag(),p.mag())
590 // 785 //
591 G4double tmp = -B - std::copysign(std::sqrt( << 786 G4double radius= p.mag();
592 G4double trmax = (tmp < 0.) ? C/tmp : tmp/A; << 787 G4double tmp= norm.mag();
>> 788 if ( (tmp > 0.0) && (1.0 < radius*tmp) ) {radius = 1.0/tmp;}
593 789
594 // Find distance and set normal, if required << 790 // Approximate distance to curved surface ( <= actual distance )
595 // 791 //
596 G4double tmax = std::min(tzmax, trmax); << 792 distR = (1.0 - p*norm) * radius / 2.0;
597 //if (tmax < halfTolerance) tmax = 0.; << 793
>> 794 // Distance to z-cut plane
>> 795 //
>> 796 distZ = p.z() - zBottomCut;
>> 797 if (distZ < 0.0) {distZ= zTopCut - p.z();}
598 798
599 if (calcNorm) << 799 // Distance to closest surface from inside
>> 800 //
>> 801 if ( (distZ < 0.0) || (distR < 0.0) )
600 { 802 {
601 *validNorm = true; << 803 return 0.0;
602 if (tmax == tzmax) << 804 }
603 { << 805 else
604 G4double pznew = pz + tmax * vz; << 806 {
605 n->set(0., 0., (pznew > fZMidCut) ? 1. : << 807 return (distZ < distR) ? distZ : distR;
606 } <<
607 else <<
608 { <<
609 G4double nx = (px + tmax * vx) * fSx; <<
610 G4double ny = (py + tmax * vy) * fSy; <<
611 G4double nz = (pz + tmax * vz) * fSz; <<
612 *n = G4ThreeVector(nx, ny, nz).unit(); <<
613 } <<
614 } 808 }
615 return tmax; <<
616 } 809 }
617 810
618 ////////////////////////////////////////////// << 811 ///////////////////////////////////////////////////////////////////////////////
619 // 812 //
620 // Estimate distance to surface from inside << 813 // Create a List containing the transformed vertices
>> 814 // Ordering [0-3] -fDz cross section
>> 815 // [4-7] +fDz cross section such that [0] is below [4],
>> 816 // [1] below [5] etc.
>> 817 // Note:
>> 818 // Caller has deletion resposibility
>> 819 // Potential improvement: For last slice, use actual ending angle
>> 820 // to avoid rounding error problems.
>> 821
>> 822 G4ThreeVectorList*
>> 823 G4Ellipsoid::CreateRotatedVertices(const G4AffineTransform& pTransform,
>> 824 G4int& noPolygonVertices) const
>> 825 {
>> 826 G4ThreeVectorList *vertices;
>> 827 G4ThreeVector vertex;
>> 828 G4double meshAnglePhi, meshRMaxFactor,
>> 829 crossAnglePhi, coscrossAnglePhi, sincrossAnglePhi, sAnglePhi;
>> 830 G4double meshTheta, crossTheta, startTheta;
>> 831 G4double rMaxX, rMaxY, rMaxZ, rMaxMax, rx, ry, rz;
>> 832 G4int crossSectionPhi, noPhiCrossSections, crossSectionTheta, noThetaSections;
621 833
622 G4double G4Ellipsoid::DistanceToOut(const G4Th << 834 // Phi cross sections
623 { << 835 //
624 // Safety distance in z direction << 836 noPhiCrossSections=G4int (twopi/kMeshAngleDefault)+1; // = 9!
625 G4double distZ = std::min(fZTopCut - p.z(), << 837
>> 838 /*
>> 839 if (noPhiCrossSections<kMinMeshSections) // <3
>> 840 {
>> 841 noPhiCrossSections=kMinMeshSections;
>> 842 }
>> 843 else if (noPhiCrossSections>kMaxMeshSections) // >37
>> 844 {
>> 845 noPhiCrossSections=kMaxMeshSections;
>> 846 }
>> 847 */
>> 848 meshAnglePhi=twopi/(noPhiCrossSections-1);
>> 849
>> 850 // Set start angle such that mesh will be at fRMax
>> 851 // on the x axis. Will give better extent calculations when not rotated.
>> 852
>> 853 sAnglePhi = -meshAnglePhi*0.5;
>> 854
>> 855 // Theta cross sections
>> 856
>> 857 noThetaSections = G4int(pi/kMeshAngleDefault)+3; // = 7!
626 858
627 // Safety distance to lateral surface << 859 /*
628 G4double x = p.x() * fSx; << 860 if (noThetaSections<kMinMeshSections) // <3
629 G4double y = p.y() * fSy; << 861 {
630 G4double z = p.z() * fSz; << 862 noThetaSections=kMinMeshSections;
631 G4double distR = fR - std::sqrt(x*x + y*y + << 863 }
632 << 864 else if (noThetaSections>kMaxMeshSections) // >37
633 // Return safety to out << 865 {
634 G4double dist = std::min(distZ, distR); << 866 noThetaSections=kMaxMeshSections;
635 return (dist < 0.) ? 0. : dist; << 867 }
>> 868 */
>> 869 meshTheta= pi/(noThetaSections-2);
>> 870
>> 871 // Set start angle such that mesh will be at fRMax
>> 872 // on the z axis. Will give better extent calculations when not rotated.
>> 873
>> 874 startTheta = -meshTheta*0.5;
>> 875
>> 876 meshRMaxFactor = 1.0/std::cos(0.5*
>> 877 std::sqrt(meshAnglePhi*meshAnglePhi+meshTheta*meshTheta));
>> 878 rMaxMax= (xSemiAxis > ySemiAxis ? xSemiAxis : ySemiAxis);
>> 879 if (zSemiAxis > rMaxMax) rMaxMax= zSemiAxis;
>> 880 rMaxX= xSemiAxis + rMaxMax*(meshRMaxFactor-1.0);
>> 881 rMaxY= ySemiAxis + rMaxMax*(meshRMaxFactor-1.0);
>> 882 rMaxZ= zSemiAxis + rMaxMax*(meshRMaxFactor-1.0);
>> 883 G4double* cosCrossTheta = new G4double[noThetaSections];
>> 884 G4double* sinCrossTheta = new G4double[noThetaSections];
>> 885 vertices=new G4ThreeVectorList(noPhiCrossSections*noThetaSections);
>> 886 if (vertices && cosCrossTheta && sinCrossTheta)
>> 887 {
>> 888 for (crossSectionTheta=0; crossSectionTheta<noThetaSections;
>> 889 crossSectionTheta++)
>> 890 {
>> 891 // Compute sine and cosine table (for historical reasons)
>> 892 //
>> 893 crossTheta=startTheta+crossSectionTheta*meshTheta;
>> 894 cosCrossTheta[crossSectionTheta]=std::cos(crossTheta);
>> 895 sinCrossTheta[crossSectionTheta]=std::sin(crossTheta);
>> 896 }
>> 897 for (crossSectionPhi=0; crossSectionPhi<noPhiCrossSections;
>> 898 crossSectionPhi++)
>> 899 {
>> 900 crossAnglePhi=sAnglePhi+crossSectionPhi*meshAnglePhi;
>> 901 coscrossAnglePhi=std::cos(crossAnglePhi);
>> 902 sincrossAnglePhi=std::sin(crossAnglePhi);
>> 903 for (crossSectionTheta=0; crossSectionTheta<noThetaSections;
>> 904 crossSectionTheta++)
>> 905 {
>> 906 // Compute coordinates of cross section at section crossSectionPhi
>> 907 //
>> 908 rx= sinCrossTheta[crossSectionTheta]*coscrossAnglePhi*rMaxX;
>> 909 ry= sinCrossTheta[crossSectionTheta]*sincrossAnglePhi*rMaxY;
>> 910 rz= cosCrossTheta[crossSectionTheta]*rMaxZ;
>> 911 if (rz < zBottomCut)
>> 912 { rz= zBottomCut; }
>> 913 if (rz > zTopCut)
>> 914 { rz= zTopCut; }
>> 915 vertex= G4ThreeVector(rx,ry,rz);
>> 916 vertices->push_back(pTransform.TransformPoint(vertex));
>> 917 } // Theta forward
>> 918 } // Phi
>> 919 noPolygonVertices = noThetaSections ;
>> 920 }
>> 921 else
>> 922 {
>> 923 DumpInfo();
>> 924 G4Exception("G4Ellipsoid::CreateRotatedVertices()",
>> 925 "FatalError", FatalException,
>> 926 "Error in allocation of vertices. Out of memory !");
>> 927 }
>> 928
>> 929 delete[] cosCrossTheta;
>> 930 delete[] sinCrossTheta;
>> 931
>> 932 return vertices;
636 } 933 }
637 934
638 ////////////////////////////////////////////// 935 //////////////////////////////////////////////////////////////////////////
639 // 936 //
640 // Return entity type << 937 // G4EntityType
641 938
642 G4GeometryType G4Ellipsoid::GetEntityType() co 939 G4GeometryType G4Ellipsoid::GetEntityType() const
643 { 940 {
644 return {"G4Ellipsoid"}; << 941 return G4String("G4Ellipsoid");
645 } 942 }
646 943
647 ////////////////////////////////////////////// 944 //////////////////////////////////////////////////////////////////////////
648 // 945 //
649 // Make a clone of the object 946 // Make a clone of the object
650 947
651 G4VSolid* G4Ellipsoid::Clone() const 948 G4VSolid* G4Ellipsoid::Clone() const
652 { 949 {
653 return new G4Ellipsoid(*this); 950 return new G4Ellipsoid(*this);
654 } 951 }
655 952
656 ////////////////////////////////////////////// 953 //////////////////////////////////////////////////////////////////////////
657 // 954 //
658 // Stream object contents to output stream << 955 // Stream object contents to an output stream
659 956
660 std::ostream& G4Ellipsoid::StreamInfo( std::os 957 std::ostream& G4Ellipsoid::StreamInfo( std::ostream& os ) const
661 { 958 {
662 G4long oldprc = os.precision(16); <<
663 os << "------------------------------------- 959 os << "-----------------------------------------------------------\n"
664 << " *** Dump for solid - " << GetName 960 << " *** Dump for solid - " << GetName() << " ***\n"
665 << " ================================= 961 << " ===================================================\n"
666 << " Solid type: " << GetEntityType() << << 962 << " Solid type: G4Ellipsoid\n"
667 << " Parameters: \n" 963 << " Parameters: \n"
668 << " semi-axis x: " << GetDx()/mm << " << 964
669 << " semi-axis y: " << GetDy()/mm << " << 965 << " semi-axis x: " << xSemiAxis/mm << " mm \n"
670 << " semi-axis z: " << GetDz()/mm << " << 966 << " semi-axis y: " << ySemiAxis/mm << " mm \n"
671 << " lower cut in z: " << GetZBottomCu << 967 << " semi-axis z: " << zSemiAxis/mm << " mm \n"
672 << " upper cut in z: " << GetZTopCut() << 968 << " max semi-axis: " << semiAxisMax/mm << " mm \n"
>> 969 << " lower cut plane level z: " << zBottomCut/mm << " mm \n"
>> 970 << " upper cut plane level z: " << zTopCut/mm << " mm \n"
673 << "------------------------------------- 971 << "-----------------------------------------------------------\n";
674 os.precision(oldprc); << 972
675 return os; 973 return os;
676 } 974 }
677 975
678 ////////////////////////////////////////////// << 976 ////////////////////////////////////////////////////////////////////
679 // 977 //
680 // Return volume << 978 // GetPointOnSurface
681 979
682 G4double G4Ellipsoid::GetCubicVolume() << 980 G4ThreeVector G4Ellipsoid::GetPointOnSurface() const
683 { 981 {
684 if (fCubicVolume == 0.) << 982 G4double aTop, aBottom, aCurved, chose, xRand, yRand, zRand, phi;
>> 983 G4double cosphi, sinphi, costheta, sintheta, alpha, beta, max1, max2, max3;
>> 984
>> 985 max1 = xSemiAxis > ySemiAxis ? xSemiAxis : ySemiAxis;
>> 986 max1 = max1 > zSemiAxis ? max1 : zSemiAxis;
>> 987 if (max1 == xSemiAxis) { max2 = ySemiAxis; max3 = zSemiAxis; }
>> 988 else if (max1 == ySemiAxis) { max2 = xSemiAxis; max3 = zSemiAxis; }
>> 989 else { max2 = xSemiAxis; max3 = ySemiAxis; }
>> 990
>> 991 phi = RandFlat::shoot(0.,twopi);
>> 992
>> 993 cosphi = std::cos(phi); sinphi = std::sin(phi);
>> 994 costheta = RandFlat::shoot(zBottomCut,zTopCut)/zSemiAxis;
>> 995 sintheta = std::sqrt(1.-sqr(costheta));
>> 996
>> 997 alpha = 1.-sqr(max2/max1); beta = 1.-sqr(max3/max1);
>> 998
>> 999 aTop = pi*xSemiAxis*ySemiAxis*(1 - sqr(zTopCut/zSemiAxis));
>> 1000 aBottom = pi*xSemiAxis*ySemiAxis*(1 - sqr(zBottomCut/zSemiAxis));
>> 1001
>> 1002 // approximation
>> 1003 // from:" http://www.citr.auckland.ac.nz/techreports/2004/CITR-TR-139.pdf"
>> 1004 aCurved = 4.*pi*max1*max2*(1.-1./6.*(alpha+beta)-
>> 1005 1./120.*(3.*sqr(alpha)+2.*alpha*beta+3.*sqr(beta)));
>> 1006
>> 1007 aCurved *= 0.5*(1.2*zTopCut/zSemiAxis - 1.2*zBottomCut/zSemiAxis);
>> 1008
>> 1009 if( ( zTopCut >= zSemiAxis && zBottomCut <= -1.*zSemiAxis )
>> 1010 || ( zTopCut == 0 && zBottomCut ==0 ) )
685 { 1011 {
686 G4double piAB_3 = CLHEP::pi * fDx * fDy / << 1012 aTop = 0; aBottom = 0;
687 fCubicVolume = 4. * piAB_3 * fDz; <<
688 if (fZBottomCut > -fDz) <<
689 { <<
690 G4double hbot = 1. + fZBottomCut / fDz; <<
691 fCubicVolume -= piAB_3 * hbot * hbot * ( <<
692 } <<
693 if (fZTopCut < fDz) <<
694 { <<
695 G4double htop = 1. - fZTopCut / fDz; <<
696 fCubicVolume -= piAB_3 * htop * htop * ( <<
697 } <<
698 } 1013 }
699 return fCubicVolume; << 1014
700 } << 1015 chose = RandFlat::shoot(0.,aTop + aBottom + aCurved);
701 << 1016
702 ////////////////////////////////////////////// << 1017 if(chose < aCurved)
703 // << 1018 {
704 // Calculate area of lateral surface << 1019 xRand = xSemiAxis*sintheta*cosphi;
705 << 1020 yRand = ySemiAxis*sintheta*sinphi;
706 G4double G4Ellipsoid::LateralSurfaceArea() con << 1021 zRand = zSemiAxis*costheta;
707 { << 1022 return G4ThreeVector (xRand,yRand,zRand);
708 constexpr G4int NPHI = 1000.; <<
709 constexpr G4double dPhi = CLHEP::halfpi/NPHI <<
710 constexpr G4double eps = 4.*DBL_EPSILON; <<
711 <<
712 G4double aa = fDx*fDx; <<
713 G4double bb = fDy*fDy; <<
714 G4double cc = fDz*fDz; <<
715 G4double ab = fDx*fDy; <<
716 G4double cc_aa = cc/aa; <<
717 G4double cc_bb = cc/bb; <<
718 G4double zmax = std::min(fZTopCut, fDz); <<
719 G4double zmin = std::max(fZBottomCut,-fDz); <<
720 G4double zmax_c = zmax/fDz; <<
721 G4double zmin_c = zmin/fDz; <<
722 G4double area = 0.; <<
723 <<
724 if (aa == bb) // spheroid, use analytical ex <<
725 { <<
726 G4double k = fDz/fDx; <<
727 G4double kk = k*k; <<
728 if (kk < 1. - eps) <<
729 { <<
730 G4double invk = fDx/fDz; <<
731 G4double root = std::sqrt(1. - kk); <<
732 G4double tmax = zmax_c*root; <<
733 G4double tmin = zmin_c*root; <<
734 area = CLHEP::pi*ab* <<
735 ((zmax_c*std::sqrt(kk + tmax*tmax) - z <<
736 (std::asinh(tmax*invk) - std::asinh(t <<
737 } <<
738 else if (kk > 1. + eps) <<
739 { <<
740 G4double invk = fDx/fDz; <<
741 G4double root = std::sqrt(kk - 1.); <<
742 G4double tmax = zmax_c*root; <<
743 G4double tmin = zmin_c*root; <<
744 area = CLHEP::pi*ab* <<
745 ((zmax_c*std::sqrt(kk - tmax*tmax) - z <<
746 (std::asin(tmax*invk) - std::asin(tmi <<
747 } <<
748 else <<
749 { <<
750 area = CLHEP::twopi*fDx*(zmax - zmin); <<
751 } <<
752 return area; <<
753 } 1023 }
754 << 1024 else if(chose >= aCurved && chose < aCurved + aTop)
755 // ellipsoid, integration along phi <<
756 for (G4int i = 0; i < NPHI; ++i) <<
757 { 1025 {
758 G4double sinPhi = std::sin(dPhi*(i + 0.5)) << 1026 xRand = RandFlat::shoot(-1.,1.)*xSemiAxis
759 G4double kk = cc_aa + (cc_bb - cc_aa)*sinP << 1027 * std::sqrt(1-sqr(zTopCut/zSemiAxis));
760 if (kk < 1. - eps) << 1028 yRand = RandFlat::shoot(-1.,1.)*ySemiAxis
761 { << 1029 * std::sqrt(1.-sqr(zTopCut/zSemiAxis)-sqr(xRand/xSemiAxis));
762 G4double root = std::sqrt(1. - kk); << 1030 zRand = zTopCut;
763 G4double tmax = zmax_c*root; << 1031 return G4ThreeVector (xRand,yRand,zRand);
764 G4double tmin = zmin_c*root; <<
765 G4double invk = 1./std::sqrt(kk); <<
766 area += 2.*ab*dPhi* <<
767 ((zmax_c*std::sqrt(kk + tmax*tmax) - z <<
768 (std::asinh(tmax*invk) - std::asinh(t <<
769 } <<
770 else if (kk > 1. + eps) <<
771 { <<
772 G4double root = std::sqrt(kk - 1.); <<
773 G4double tmax = zmax_c*root; <<
774 G4double tmin = zmin_c*root; <<
775 G4double invk = 1./std::sqrt(kk); <<
776 area += 2.*ab*dPhi* <<
777 ((zmax_c*std::sqrt(kk - tmax*tmax) - z <<
778 (std::asin(tmax*invk) - std::asin(tmi <<
779 } <<
780 else <<
781 { <<
782 area += 4.*ab*dPhi*(zmax_c - zmin_c); <<
783 } <<
784 } 1032 }
785 return area; << 1033 else
786 } <<
787 <<
788 ////////////////////////////////////////////// <<
789 // <<
790 // Return surface area <<
791 <<
792 G4double G4Ellipsoid::GetSurfaceArea() <<
793 { <<
794 if (fSurfaceArea == 0.) <<
795 { 1034 {
796 G4double piAB = CLHEP::pi * fDx * fDy; << 1035 xRand = RandFlat::shoot(-1.,1.)*xSemiAxis
797 fSurfaceArea = LateralSurfaceArea(); << 1036 * std::sqrt(1-sqr(zBottomCut/zSemiAxis));
798 if (fZBottomCut > -fDz) << 1037 yRand = RandFlat::shoot(-1.,1.)*ySemiAxis
799 { << 1038 * std::sqrt(1.-sqr(zBottomCut/zSemiAxis)-sqr(xRand/xSemiAxis));
800 G4double hbot = 1. + fZBottomCut / fDz; << 1039 zRand = zBottomCut;
801 fSurfaceArea += piAB * hbot * (2. - hbot << 1040 return G4ThreeVector (xRand,yRand,zRand);
802 } <<
803 if (fZTopCut < fDz) <<
804 { <<
805 G4double htop = 1. - fZTopCut / fDz; <<
806 fSurfaceArea += piAB * htop * (2. - htop <<
807 } <<
808 } 1041 }
809 return fSurfaceArea; <<
810 } 1042 }
811 1043
812 ////////////////////////////////////////////// << 1044 /////////////////////////////////////////////////////////////////////////////
813 // <<
814 // Return random point on surface <<
815 <<
816 G4ThreeVector G4Ellipsoid::GetPointOnSurface() <<
817 { <<
818 G4double A = GetDx(); <<
819 G4double B = GetDy(); <<
820 G4double C = GetDz(); <<
821 G4double Zbot = GetZBottomCut(); <<
822 G4double Ztop = GetZTopCut(); <<
823 <<
824 // Calculate cut areas <<
825 G4double Hbot = 1. + Zbot / C; <<
826 G4double Htop = 1. - Ztop / C; <<
827 G4double piAB = CLHEP::pi * A * B; <<
828 G4double Sbot = piAB * Hbot * (2. - Hbot); <<
829 G4double Stop = piAB * Htop * (2. - Htop); <<
830 <<
831 // Get area of lateral surface <<
832 if (fLateralArea == 0.) <<
833 { <<
834 G4AutoLock l(&lateralareaMutex); <<
835 fLateralArea = LateralSurfaceArea(); <<
836 l.unlock(); <<
837 } <<
838 G4double Slat = fLateralArea; <<
839 <<
840 // Select surface (0 - bottom cut, 1 - later <<
841 G4double select = (Sbot + Slat + Stop) * G4Q <<
842 G4int k = 0; <<
843 if (select > Sbot) k = 1; <<
844 if (select > Sbot + Slat) k = 2; <<
845 <<
846 // Pick random point on selected surface (re <<
847 G4ThreeVector p; <<
848 switch (k) <<
849 { <<
850 case 0: // bootom z-cut <<
851 { <<
852 G4double scale = std::sqrt(Hbot * (2. - <<
853 G4TwoVector rho = G4RandomPointInEllipse <<
854 p.set(rho.x(), rho.y(), Zbot); <<
855 break; <<
856 } <<
857 case 1: // lateral surface <<
858 { <<
859 G4double x, y, z; <<
860 G4double mu_max = std::max(std::max(A * <<
861 for (G4int i = 0; i < 1000; ++i) <<
862 { <<
863 // generate random point on unit spher <<
864 z = (Zbot + (Ztop - Zbot) * G4QuickRan <<
865 G4double rho = std::sqrt((1. + z) * (1 <<
866 G4double phi = CLHEP::twopi * G4QuickR <<
867 x = rho * std::cos(phi); <<
868 y = rho * std::sin(phi); <<
869 // check acceptance <<
870 G4double xbc = x * B * C; <<
871 G4double yac = y * A * C; <<
872 G4double zab = z * A * B; <<
873 G4double mu = std::sqrt(xbc * xbc + y <<
874 if (mu_max * G4QuickRand() <= mu) brea <<
875 } <<
876 p.set(A * x, B * y, C * z); <<
877 break; <<
878 } <<
879 case 2: // top z-cut <<
880 { <<
881 G4double scale = std::sqrt(Htop * (2. - <<
882 G4TwoVector rho = G4RandomPointInEllipse <<
883 p.set(rho.x(), rho.y(), Ztop); <<
884 break; <<
885 } <<
886 } <<
887 return p; <<
888 } <<
889 <<
890 ////////////////////////////////////////////// <<
891 // 1045 //
892 // Methods for visualisation 1046 // Methods for visualisation
893 1047
894 void G4Ellipsoid::DescribeYourselfTo (G4VGraph 1048 void G4Ellipsoid::DescribeYourselfTo (G4VGraphicsScene& scene) const
895 { 1049 {
896 scene.AddSolid(*this); 1050 scene.AddSolid(*this);
897 } 1051 }
898 1052
899 ////////////////////////////////////////////// <<
900 // <<
901 // Return vis extent <<
902 <<
903 G4VisExtent G4Ellipsoid::GetExtent() const 1053 G4VisExtent G4Ellipsoid::GetExtent() const
904 { 1054 {
905 return { -fXmax, fXmax, -fYmax, fYmax, fZBot << 1055 // Define the sides of the box into which the G4Ellipsoid instance would fit.
>> 1056 //
>> 1057 return G4VisExtent (-semiAxisMax, semiAxisMax,
>> 1058 -semiAxisMax, semiAxisMax,
>> 1059 -semiAxisMax, semiAxisMax);
906 } 1060 }
907 1061
908 ////////////////////////////////////////////// << 1062 G4NURBS* G4Ellipsoid::CreateNURBS () const
909 // << 1063 {
910 // Create polyhedron << 1064 // Box for now!!!
>> 1065 //
>> 1066 return new G4NURBSbox(semiAxisMax, semiAxisMax, semiAxisMax);
>> 1067 }
911 1068
912 G4Polyhedron* G4Ellipsoid::CreatePolyhedron () 1069 G4Polyhedron* G4Ellipsoid::CreatePolyhedron () const
913 { 1070 {
914 return new G4PolyhedronEllipsoid(fDx, fDy, f << 1071 return new G4PolyhedronEllipsoid(xSemiAxis, ySemiAxis, zSemiAxis,
>> 1072 zBottomCut, zTopCut);
915 } 1073 }
916 1074
917 ////////////////////////////////////////////// <<
918 // <<
919 // Return pointer to polyhedron <<
920 <<
921 G4Polyhedron* G4Ellipsoid::GetPolyhedron () co 1075 G4Polyhedron* G4Ellipsoid::GetPolyhedron () const
922 { 1076 {
923 if (fpPolyhedron == nullptr || << 1077 if (!fpPolyhedron ||
924 fRebuildPolyhedron || <<
925 fpPolyhedron->GetNumberOfRotationStepsAt 1078 fpPolyhedron->GetNumberOfRotationStepsAtTimeOfCreation() !=
926 fpPolyhedron->GetNumberOfRotationSteps() 1079 fpPolyhedron->GetNumberOfRotationSteps())
927 { 1080 {
928 G4AutoLock l(&polyhedronMutex); <<
929 delete fpPolyhedron; 1081 delete fpPolyhedron;
930 fpPolyhedron = CreatePolyhedron(); 1082 fpPolyhedron = CreatePolyhedron();
931 fRebuildPolyhedron = false; <<
932 l.unlock(); <<
933 } 1083 }
934 return fpPolyhedron; 1084 return fpPolyhedron;
935 } 1085 }
936 <<
937 #endif // !defined(G4GEOM_USE_UELLIPSOID) || ! <<
938 1086