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25 // 25 //
26 // Implementation of G4PolyhedraSide, the face <<
27 // one segmented side of a Polyhedra <<
28 // 26 //
29 // Author: David C. Williams (davidw@scipp.ucs << 27 // $Id: G4PolyhedraSide.cc,v 1.13 2007/05/31 13:52:48 gcosmo Exp $
>> 28 // GEANT4 tag $Name: geant4-09-01-patch-02 $
>> 29 //
>> 30 //
>> 31 // --------------------------------------------------------------------
>> 32 // GEANT 4 class source file
>> 33 //
>> 34 //
>> 35 // G4PolyhedraSide.cc
>> 36 //
>> 37 // Implemenation of the face representing one segmented side of a Polyhedra
>> 38 //
30 // ------------------------------------------- 39 // --------------------------------------------------------------------
31 40
32 #include "G4PolyhedraSide.hh" 41 #include "G4PolyhedraSide.hh"
33 #include "G4PhysicalConstants.hh" <<
34 #include "G4IntersectingCone.hh" 42 #include "G4IntersectingCone.hh"
35 #include "G4ClippablePolygon.hh" 43 #include "G4ClippablePolygon.hh"
36 #include "G4AffineTransform.hh" 44 #include "G4AffineTransform.hh"
37 #include "G4SolidExtentList.hh" 45 #include "G4SolidExtentList.hh"
38 #include "G4GeometryTolerance.hh" 46 #include "G4GeometryTolerance.hh"
39 47
40 #include "Randomize.hh" <<
41 <<
42 // This new field helps to use the class G4PhS <<
43 // 48 //
44 G4PhSideManager G4PolyhedraSide::subInstanceMa <<
45 <<
46 // This macro changes the references to fields <<
47 // in the class G4PhSideData. <<
48 // <<
49 #define G4MT_phphix ((subInstanceManager.offse <<
50 #define G4MT_phphiy ((subInstanceManager.offse <<
51 #define G4MT_phphiz ((subInstanceManager.offse <<
52 #define G4MT_phphik ((subInstanceManager.offse <<
53 <<
54 // Returns the private data instance manager. <<
55 // <<
56 const G4PhSideManager& G4PolyhedraSide::GetSub <<
57 { <<
58 return subInstanceManager; <<
59 } <<
60 <<
61 // Constructor 49 // Constructor
62 // 50 //
63 // Values for r1,z1 and r2,z2 should be specif 51 // Values for r1,z1 and r2,z2 should be specified in clockwise
64 // order in (r,z). 52 // order in (r,z).
65 // 53 //
66 G4PolyhedraSide::G4PolyhedraSide( const G4Poly << 54 G4PolyhedraSide::G4PolyhedraSide( const G4PolyhedraSideRZ *prevRZ,
67 const G4Poly << 55 const G4PolyhedraSideRZ *tail,
68 const G4Poly << 56 const G4PolyhedraSideRZ *head,
69 const G4Poly << 57 const G4PolyhedraSideRZ *nextRZ,
70 G4int 58 G4int theNumSide,
71 G4doub 59 G4double thePhiStart,
72 G4doub 60 G4double thePhiTotal,
73 G4bool 61 G4bool thePhiIsOpen,
74 G4bool 62 G4bool isAllBehind )
75 { 63 {
76 64
77 instanceID = subInstanceManager.CreateSubIns <<
78 <<
79 kCarTolerance = G4GeometryTolerance::GetInst 65 kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
80 G4MT_phphix = 0.0; G4MT_phphiy = 0.0; G4MT_p <<
81 G4MT_phphik = 0.0; <<
82 66
83 // 67 //
84 // Record values 68 // Record values
85 // 69 //
86 r[0] = tail->r; z[0] = tail->z; 70 r[0] = tail->r; z[0] = tail->z;
87 r[1] = head->r; z[1] = head->z; 71 r[1] = head->r; z[1] = head->z;
88 72
89 G4double phiTotal; 73 G4double phiTotal;
90 74
91 // 75 //
92 // Set phi to our convention 76 // Set phi to our convention
93 // 77 //
94 startPhi = thePhiStart; 78 startPhi = thePhiStart;
95 while (startPhi < 0.0) // Loop checking, << 79 while (startPhi < 0.0) startPhi += twopi;
96 startPhi += twopi; <<
97 80
98 phiIsOpen = thePhiIsOpen; 81 phiIsOpen = thePhiIsOpen;
99 phiTotal = (phiIsOpen) ? thePhiTotal : twopi 82 phiTotal = (phiIsOpen) ? thePhiTotal : twopi;
100 83
101 allBehind = isAllBehind; 84 allBehind = isAllBehind;
102 85
103 // 86 //
104 // Make our intersecting cone 87 // Make our intersecting cone
105 // 88 //
106 cone = new G4IntersectingCone( r, z ); 89 cone = new G4IntersectingCone( r, z );
107 90
108 // 91 //
109 // Construct side plane vector set 92 // Construct side plane vector set
110 // 93 //
111 numSide = theNumSide>0 ? theNumSide : 1; << 94 numSide = theNumSide;
112 deltaPhi = phiTotal/numSide; << 95 deltaPhi = phiTotal/theNumSide;
113 endPhi = startPhi+phiTotal; 96 endPhi = startPhi+phiTotal;
114 << 97
115 const std::size_t maxSides = numSide; << 98 vecs = new G4PolyhedraSideVec[numSide];
116 vecs = new G4PolyhedraSideVec[maxSides]; << 99
117 edges = new G4PolyhedraSideEdge[phiIsOpen ? << 100 edges = new G4PolyhedraSideEdge[phiIsOpen ? numSide+1 : numSide];
118 101
119 // 102 //
120 // ...this is where we start 103 // ...this is where we start
121 // 104 //
122 G4double phi = startPhi; 105 G4double phi = startPhi;
123 G4ThreeVector a1( r[0]*std::cos(phi), r[0]*s 106 G4ThreeVector a1( r[0]*std::cos(phi), r[0]*std::sin(phi), z[0] ),
124 b1( r[1]*std::cos(phi), r[1]*std::si 107 b1( r[1]*std::cos(phi), r[1]*std::sin(phi), z[1] ),
125 c1( prevRZ->r*std::cos(phi), prevRZ- 108 c1( prevRZ->r*std::cos(phi), prevRZ->r*std::sin(phi), prevRZ->z ),
126 d1( nextRZ->r*std::cos(phi), nextRZ- 109 d1( nextRZ->r*std::cos(phi), nextRZ->r*std::sin(phi), nextRZ->z ),
127 a2, b2, c2, d2; 110 a2, b2, c2, d2;
128 G4PolyhedraSideEdge *edge = edges; 111 G4PolyhedraSideEdge *edge = edges;
129 112
130 G4PolyhedraSideVec *vec = vecs; 113 G4PolyhedraSideVec *vec = vecs;
131 do // Loop checking, 13.08.2015, G.Cosmo << 114 do
132 { 115 {
133 // 116 //
134 // ...this is where we are going 117 // ...this is where we are going
135 // 118 //
136 phi += deltaPhi; 119 phi += deltaPhi;
137 a2 = G4ThreeVector( r[0]*std::cos(phi), r[ 120 a2 = G4ThreeVector( r[0]*std::cos(phi), r[0]*std::sin(phi), z[0] );
138 b2 = G4ThreeVector( r[1]*std::cos(phi), r[ 121 b2 = G4ThreeVector( r[1]*std::cos(phi), r[1]*std::sin(phi), z[1] );
139 c2 = G4ThreeVector( prevRZ->r*std::cos(phi 122 c2 = G4ThreeVector( prevRZ->r*std::cos(phi), prevRZ->r*std::sin(phi), prevRZ->z );
140 d2 = G4ThreeVector( nextRZ->r*std::cos(phi 123 d2 = G4ThreeVector( nextRZ->r*std::cos(phi), nextRZ->r*std::sin(phi), nextRZ->z );
141 124
142 G4ThreeVector tt; 125 G4ThreeVector tt;
143 126
144 // 127 //
145 // ...build some relevant vectors. 128 // ...build some relevant vectors.
146 // the point is to sacrifice a little m 129 // the point is to sacrifice a little memory with precalcs
147 // to gain speed 130 // to gain speed
148 // 131 //
149 vec->center = 0.25*( a1 + a2 + b1 + b2 ); 132 vec->center = 0.25*( a1 + a2 + b1 + b2 );
150 133
151 tt = b2 + b1 - a2 - a1; 134 tt = b2 + b1 - a2 - a1;
152 vec->surfRZ = tt.unit(); 135 vec->surfRZ = tt.unit();
153 if (vec==vecs) lenRZ = 0.25*tt.mag(); 136 if (vec==vecs) lenRZ = 0.25*tt.mag();
154 137
155 tt = b2 - b1 + a2 - a1; 138 tt = b2 - b1 + a2 - a1;
156 vec->surfPhi = tt.unit(); 139 vec->surfPhi = tt.unit();
157 if (vec==vecs) 140 if (vec==vecs)
158 { 141 {
159 lenPhi[0] = 0.25*tt.mag(); 142 lenPhi[0] = 0.25*tt.mag();
160 tt = b2 - b1; 143 tt = b2 - b1;
161 lenPhi[1] = (0.5*tt.mag()-lenPhi[0])/len 144 lenPhi[1] = (0.5*tt.mag()-lenPhi[0])/lenRZ;
162 } 145 }
163 146
164 tt = vec->surfPhi.cross(vec->surfRZ); 147 tt = vec->surfPhi.cross(vec->surfRZ);
165 vec->normal = tt.unit(); 148 vec->normal = tt.unit();
166 149
167 // 150 //
168 // ...edge normals are the average of the 151 // ...edge normals are the average of the normals of
169 // the two faces they connect. 152 // the two faces they connect.
170 // 153 //
171 // ...edge normals are necessary if we are 154 // ...edge normals are necessary if we are to accurately
172 // decide if a point is "inside" a face 155 // decide if a point is "inside" a face. For non-convex
173 // shapes, it is absolutely necessary t 156 // shapes, it is absolutely necessary to know information
174 // on adjacent faces to accurate determ 157 // on adjacent faces to accurate determine this.
175 // 158 //
176 // ...we don't need them for the phi edges 159 // ...we don't need them for the phi edges, since that
177 // information is taken care of interna 160 // information is taken care of internally. The r/z edges,
178 // however, depend on the adjacent G4Po 161 // however, depend on the adjacent G4PolyhedraSide.
179 // 162 //
180 G4ThreeVector a12, adj; 163 G4ThreeVector a12, adj;
181 164
182 a12 = a2-a1; 165 a12 = a2-a1;
183 166
184 adj = 0.5*(c1+c2-a1-a2); 167 adj = 0.5*(c1+c2-a1-a2);
185 adj = adj.cross(a12); 168 adj = adj.cross(a12);
186 adj = adj.unit() + vec->normal; 169 adj = adj.unit() + vec->normal;
187 vec->edgeNorm[0] = adj.unit(); 170 vec->edgeNorm[0] = adj.unit();
188 171
189 a12 = b1-b2; 172 a12 = b1-b2;
190 adj = 0.5*(d1+d2-b1-b2); 173 adj = 0.5*(d1+d2-b1-b2);
191 adj = adj.cross(a12); 174 adj = adj.cross(a12);
192 adj = adj.unit() + vec->normal; 175 adj = adj.unit() + vec->normal;
193 vec->edgeNorm[1] = adj.unit(); 176 vec->edgeNorm[1] = adj.unit();
194 177
195 // 178 //
196 // ...the corners are crucial. It is impor 179 // ...the corners are crucial. It is important that
197 // they are calculated consistently for 180 // they are calculated consistently for adjacent
198 // G4PolyhedraSides, to avoid gaps caus 181 // G4PolyhedraSides, to avoid gaps caused by roundoff.
199 // 182 //
200 vec->edges[0] = edge; 183 vec->edges[0] = edge;
201 edge->corner[0] = a1; 184 edge->corner[0] = a1;
202 edge->corner[1] = b1; 185 edge->corner[1] = b1;
203 edge++; 186 edge++;
204 vec->edges[1] = edge; 187 vec->edges[1] = edge;
205 188
206 a1 = a2; 189 a1 = a2;
207 b1 = b2; 190 b1 = b2;
208 c1 = c2; 191 c1 = c2;
209 d1 = d2; 192 d1 = d2;
210 } while( ++vec < vecs+maxSides ); << 193 } while( ++vec < vecs+numSide );
211 194
212 // 195 //
213 // Clean up hanging edge 196 // Clean up hanging edge
214 // 197 //
215 if (phiIsOpen) 198 if (phiIsOpen)
216 { 199 {
217 edge->corner[0] = a2; 200 edge->corner[0] = a2;
218 edge->corner[1] = b2; 201 edge->corner[1] = b2;
219 } 202 }
220 else 203 else
221 { 204 {
222 vecs[maxSides-1].edges[1] = edges; << 205 vecs[numSide-1].edges[1] = edges;
223 } 206 }
224 207
225 // 208 //
226 // Go back and fill in remaining fields in e 209 // Go back and fill in remaining fields in edges
227 // 210 //
228 vec = vecs; 211 vec = vecs;
229 G4PolyhedraSideVec *prev = vecs+maxSides-1; << 212 G4PolyhedraSideVec *prev = vecs+numSide-1;
230 do // Loop checking, 13.08.2015, G.Cosmo << 213 do
231 { 214 {
232 edge = vec->edges[0]; // The edge betwe 215 edge = vec->edges[0]; // The edge between prev and vec
233 216
234 // 217 //
235 // Okay: edge normal is average of normals 218 // Okay: edge normal is average of normals of adjacent faces
236 // 219 //
237 G4ThreeVector eNorm = vec->normal + prev-> 220 G4ThreeVector eNorm = vec->normal + prev->normal;
238 edge->normal = eNorm.unit(); 221 edge->normal = eNorm.unit();
239 222
240 // 223 //
241 // Vertex normal is average of norms of ad 224 // Vertex normal is average of norms of adjacent surfaces (all four)
242 // However, vec->edgeNorm is unit vector i 225 // However, vec->edgeNorm is unit vector in some direction
243 // as the sum of normals of adjacent Polyh 226 // as the sum of normals of adjacent PolyhedraSide with vec.
244 // The normalization used for this vector 227 // The normalization used for this vector should be the same
245 // for vec and prev. 228 // for vec and prev.
246 // 229 //
247 eNorm = vec->edgeNorm[0] + prev->edgeNorm[ 230 eNorm = vec->edgeNorm[0] + prev->edgeNorm[0];
248 edge->cornNorm[0] = eNorm.unit(); 231 edge->cornNorm[0] = eNorm.unit();
249 232
250 eNorm = vec->edgeNorm[1] + prev->edgeNorm[ 233 eNorm = vec->edgeNorm[1] + prev->edgeNorm[1];
251 edge->cornNorm[1] = eNorm.unit(); 234 edge->cornNorm[1] = eNorm.unit();
252 } while( prev=vec, ++vec < vecs + maxSides ) << 235 } while( prev=vec, ++vec < vecs + numSide );
253 236
254 if (phiIsOpen) 237 if (phiIsOpen)
255 { 238 {
256 // G4double rFact = std::cos(0.5*deltaPhi) 239 // G4double rFact = std::cos(0.5*deltaPhi);
257 // 240 //
258 // If phi is open, we need to patch up nor 241 // If phi is open, we need to patch up normals of the
259 // first and last edges and their correspo 242 // first and last edges and their corresponding
260 // vertices. 243 // vertices.
261 // 244 //
262 // We use vectors that are in the plane of 245 // We use vectors that are in the plane of the
263 // face. This should be safe. 246 // face. This should be safe.
264 // 247 //
265 vec = vecs; 248 vec = vecs;
266 249
267 G4ThreeVector normvec = vec->edges[0]->cor 250 G4ThreeVector normvec = vec->edges[0]->corner[0]
268 - vec->edges[0]->cor 251 - vec->edges[0]->corner[1];
269 normvec = normvec.cross(vec->normal); 252 normvec = normvec.cross(vec->normal);
270 if (normvec.dot(vec->surfPhi) > 0) normvec 253 if (normvec.dot(vec->surfPhi) > 0) normvec = -normvec;
271 254
272 vec->edges[0]->normal = normvec.unit(); 255 vec->edges[0]->normal = normvec.unit();
273 256
274 vec->edges[0]->cornNorm[0] = (vec->edges[0 257 vec->edges[0]->cornNorm[0] = (vec->edges[0]->corner[0]
275 - vec->center) 258 - vec->center).unit();
276 vec->edges[0]->cornNorm[1] = (vec->edges[0 259 vec->edges[0]->cornNorm[1] = (vec->edges[0]->corner[1]
277 - vec->center) 260 - vec->center).unit();
278 261
279 // 262 //
280 // Repeat for ending phi 263 // Repeat for ending phi
281 // 264 //
282 vec = vecs + maxSides - 1; << 265 vec = vecs + numSide - 1;
283 266
284 normvec = vec->edges[1]->corner[0] - vec-> 267 normvec = vec->edges[1]->corner[0] - vec->edges[1]->corner[1];
285 normvec = normvec.cross(vec->normal); 268 normvec = normvec.cross(vec->normal);
286 if (normvec.dot(vec->surfPhi) < 0) normvec 269 if (normvec.dot(vec->surfPhi) < 0) normvec = -normvec;
287 270
288 vec->edges[1]->normal = normvec.unit(); 271 vec->edges[1]->normal = normvec.unit();
289 272
290 vec->edges[1]->cornNorm[0] = (vec->edges[1 273 vec->edges[1]->cornNorm[0] = (vec->edges[1]->corner[0]
291 - vec->center) 274 - vec->center).unit();
292 vec->edges[1]->cornNorm[1] = (vec->edges[1 275 vec->edges[1]->cornNorm[1] = (vec->edges[1]->corner[1]
293 - vec->center) 276 - vec->center).unit();
294 } 277 }
295 278
296 // 279 //
297 // edgeNorm is the factor one multiplies the 280 // edgeNorm is the factor one multiplies the distance along vector phi
298 // on the surface of one of our sides in ord 281 // on the surface of one of our sides in order to calculate the distance
299 // from the edge. (see routine DistanceAway) 282 // from the edge. (see routine DistanceAway)
300 // 283 //
301 edgeNorm = 1.0/std::sqrt( 1.0 + lenPhi[1]*le 284 edgeNorm = 1.0/std::sqrt( 1.0 + lenPhi[1]*lenPhi[1] );
302 } 285 }
303 286
>> 287
>> 288 //
304 // Fake default constructor - sets only member 289 // Fake default constructor - sets only member data and allocates memory
305 // for usage restri 290 // for usage restricted to object persistency.
306 // 291 //
307 G4PolyhedraSide::G4PolyhedraSide( __void__&) 292 G4PolyhedraSide::G4PolyhedraSide( __void__&)
308 : startPhi(0.), deltaPhi(0.), endPhi(0.), << 293 : cone(0), vecs(0), edges(0)
309 lenRZ(0.), edgeNorm(0.), kCarTolerance(0.) <<
310 { 294 {
311 r[0] = r[1] = 0.; <<
312 z[0] = z[1] = 0.; <<
313 lenPhi[0] = lenPhi[1] = 0.; <<
314 } 295 }
315 296
316 297
>> 298 //
317 // Destructor 299 // Destructor
318 // 300 //
319 G4PolyhedraSide::~G4PolyhedraSide() 301 G4PolyhedraSide::~G4PolyhedraSide()
320 { 302 {
321 delete cone; 303 delete cone;
322 delete [] vecs; 304 delete [] vecs;
323 delete [] edges; 305 delete [] edges;
324 } 306 }
325 307
>> 308
>> 309 //
326 // Copy constructor 310 // Copy constructor
327 // 311 //
328 G4PolyhedraSide::G4PolyhedraSide( const G4Poly << 312 G4PolyhedraSide::G4PolyhedraSide( const G4PolyhedraSide &source )
>> 313 : G4VCSGface()
329 { 314 {
330 instanceID = subInstanceManager.CreateSubIns <<
331 <<
332 CopyStuff( source ); 315 CopyStuff( source );
333 } 316 }
334 317
335 318
336 // 319 //
337 // Assignment operator 320 // Assignment operator
338 // 321 //
339 G4PolyhedraSide& G4PolyhedraSide::operator=( c << 322 G4PolyhedraSide& G4PolyhedraSide::operator=( const G4PolyhedraSide &source )
340 { 323 {
341 if (this == &source) return *this; 324 if (this == &source) return *this;
342 325
343 delete cone; 326 delete cone;
344 delete [] vecs; 327 delete [] vecs;
345 delete [] edges; 328 delete [] edges;
346 329
347 CopyStuff( source ); 330 CopyStuff( source );
348 331
349 return *this; 332 return *this;
350 } 333 }
351 334
>> 335
>> 336 //
352 // CopyStuff 337 // CopyStuff
353 // 338 //
354 void G4PolyhedraSide::CopyStuff( const G4Polyh << 339 void G4PolyhedraSide::CopyStuff( const G4PolyhedraSide &source )
355 { 340 {
356 // 341 //
357 // The simple stuff 342 // The simple stuff
358 // 343 //
>> 344 numSide = source.numSide;
359 r[0] = source.r[0]; 345 r[0] = source.r[0];
360 r[1] = source.r[1]; 346 r[1] = source.r[1];
361 z[0] = source.z[0]; 347 z[0] = source.z[0];
362 z[1] = source.z[1]; 348 z[1] = source.z[1];
363 numSide = source.numSide; <<
364 startPhi = source.startPhi; 349 startPhi = source.startPhi;
365 deltaPhi = source.deltaPhi; 350 deltaPhi = source.deltaPhi;
366 endPhi = source.endPhi; 351 endPhi = source.endPhi;
367 phiIsOpen = source.phiIsOpen; 352 phiIsOpen = source.phiIsOpen;
368 allBehind = source.allBehind; 353 allBehind = source.allBehind;
369 354
370 lenRZ = source.lenRZ; 355 lenRZ = source.lenRZ;
371 lenPhi[0] = source.lenPhi[0]; 356 lenPhi[0] = source.lenPhi[0];
372 lenPhi[1] = source.lenPhi[1]; 357 lenPhi[1] = source.lenPhi[1];
373 edgeNorm = source.edgeNorm; 358 edgeNorm = source.edgeNorm;
374 359
375 kCarTolerance = source.kCarTolerance; 360 kCarTolerance = source.kCarTolerance;
376 fSurfaceArea = source.fSurfaceArea; << 361
377 <<
378 cone = new G4IntersectingCone( *source.cone 362 cone = new G4IntersectingCone( *source.cone );
379 363
380 // 364 //
381 // Duplicate edges 365 // Duplicate edges
382 // 366 //
383 const std::size_t numSides = (numSide > 0) ? << 367 G4int numEdges = phiIsOpen ? numSide+1 : numSide;
384 const std::size_t numEdges = phiIsOpen ? num <<
385 edges = new G4PolyhedraSideEdge[numEdges]; 368 edges = new G4PolyhedraSideEdge[numEdges];
386 369
387 G4PolyhedraSideEdge *edge = edges, 370 G4PolyhedraSideEdge *edge = edges,
388 *sourceEdge = source.edges; 371 *sourceEdge = source.edges;
389 do // Loop checking, 13.08.2015, G.Cosmo << 372 do
390 { 373 {
391 *edge = *sourceEdge; 374 *edge = *sourceEdge;
392 } while( ++sourceEdge, ++edge < edges + numE 375 } while( ++sourceEdge, ++edge < edges + numEdges);
393 376
394 // 377 //
395 // Duplicate vecs 378 // Duplicate vecs
396 // 379 //
397 vecs = new G4PolyhedraSideVec[numSides]; << 380 vecs = new G4PolyhedraSideVec[numSide];
398 381
399 G4PolyhedraSideVec *vec = vecs, 382 G4PolyhedraSideVec *vec = vecs,
400 *sourceVec = source.vecs; 383 *sourceVec = source.vecs;
401 do // Loop checking, 13.08.2015, G.Cosmo << 384 do
402 { 385 {
403 *vec = *sourceVec; 386 *vec = *sourceVec;
404 vec->edges[0] = edges + (sourceVec->edges[ 387 vec->edges[0] = edges + (sourceVec->edges[0] - source.edges);
405 vec->edges[1] = edges + (sourceVec->edges[ 388 vec->edges[1] = edges + (sourceVec->edges[1] - source.edges);
406 } while( ++sourceVec, ++vec < vecs + numSide << 389 } while( ++sourceVec, ++vec < vecs + numSide );
407 } 390 }
408 391
>> 392
>> 393 //
409 // Intersect 394 // Intersect
410 // 395 //
411 // Decide if a line intersects the face. 396 // Decide if a line intersects the face.
412 // 397 //
413 // Arguments: 398 // Arguments:
414 // p = (in) starting point of line segment 399 // p = (in) starting point of line segment
415 // v = (in) direction of line segment (ass 400 // v = (in) direction of line segment (assumed a unit vector)
416 // A, B = (in) 2d transform variables (see 401 // A, B = (in) 2d transform variables (see note top of file)
417 // normSign = (in) desired sign for dot prod 402 // normSign = (in) desired sign for dot product with normal (see below)
418 // surfTolerance = (in) minimum distance fro 403 // surfTolerance = (in) minimum distance from the surface
419 // vecs = (in) Vector set array 404 // vecs = (in) Vector set array
420 // distance = (out) distance to surface furf 405 // distance = (out) distance to surface furfilling all requirements
421 // distFromSurface = (out) distance from the 406 // distFromSurface = (out) distance from the surface
422 // thisNormal = (out) normal vector of the i 407 // thisNormal = (out) normal vector of the intersecting surface
423 // 408 //
424 // Return value: 409 // Return value:
425 // true if an intersection is found. Otherwis 410 // true if an intersection is found. Otherwise, output parameters are
426 // undefined. 411 // undefined.
427 // 412 //
428 // Notes: 413 // Notes:
429 // * normSign: if we are "inside" the shape an 414 // * normSign: if we are "inside" the shape and only want to find out how far
430 // to leave the shape, we only want to consi 415 // to leave the shape, we only want to consider intersections with surfaces in
431 // which the trajectory is leaving the shape 416 // which the trajectory is leaving the shape. Since the normal vectors to the
432 // surface always point outwards from the in 417 // surface always point outwards from the inside, this means we want the dot
433 // product of the trajectory direction v and 418 // product of the trajectory direction v and the normal of the side normals[i]
434 // to be positive. Thus, we should specify n 419 // to be positive. Thus, we should specify normSign as +1.0. Otherwise, if
435 // we are outside and want to go in, normSig 420 // we are outside and want to go in, normSign should be set to -1.0.
436 // Don't set normSign to zero, or you will g 421 // Don't set normSign to zero, or you will get no intersections!
437 // 422 //
438 // * surfTolerance: see notes on argument "sur 423 // * surfTolerance: see notes on argument "surfTolerance" in routine
439 // "IntersectSidePlane". 424 // "IntersectSidePlane".
440 // ----HOWEVER---- We should *not* apply thi 425 // ----HOWEVER---- We should *not* apply this surface tolerance if the
441 // starting point is not within phi or z of 426 // starting point is not within phi or z of the surface. Specifically,
442 // if the starting point p angle in x/y plac 427 // if the starting point p angle in x/y places it on a separate side from the
443 // intersection or if the starting point p i 428 // intersection or if the starting point p is outside the z bounds of the
444 // segment, surfTolerance must be ignored or 429 // segment, surfTolerance must be ignored or we should *always* accept the
445 // intersection! 430 // intersection!
446 // This is simply because the sides do not h 431 // This is simply because the sides do not have infinite extent.
447 // 432 //
448 // 433 //
449 G4bool G4PolyhedraSide::Intersect( const G4Thr << 434 G4bool G4PolyhedraSide::Intersect( const G4ThreeVector &p,
450 const G4Thr << 435 const G4ThreeVector &v,
451 G4boo 436 G4bool outgoing,
452 G4dou 437 G4double surfTolerance,
453 G4dou << 438 G4double &distance,
454 G4dou << 439 G4double &distFromSurface,
455 G4Thr << 440 G4ThreeVector &normal,
456 G4boo << 441 G4bool &isAllBehind )
457 { 442 {
458 G4double normSign = outgoing ? +1 : -1; 443 G4double normSign = outgoing ? +1 : -1;
459 444
460 // 445 //
461 // ------------------TO BE IMPLEMENTED------ 446 // ------------------TO BE IMPLEMENTED---------------------
462 // Testing the intersection of individual ph 447 // Testing the intersection of individual phi faces is
463 // pretty straight forward. The simple thing 448 // pretty straight forward. The simple thing therefore is to
464 // form a loop and check them all in sequenc 449 // form a loop and check them all in sequence.
465 // 450 //
466 // But, I worry about one day someone making 451 // But, I worry about one day someone making
467 // a polygon with a thousands sides. A linea 452 // a polygon with a thousands sides. A linear search
468 // would not be ideal in such a case. 453 // would not be ideal in such a case.
469 // 454 //
470 // So, it would be nice to be able to quickl 455 // So, it would be nice to be able to quickly decide
471 // which face would be intersected. One can 456 // which face would be intersected. One can make a very
472 // good guess by using the intersection with 457 // good guess by using the intersection with a cone.
473 // However, this is only reliable in 99% of 458 // However, this is only reliable in 99% of the cases.
474 // 459 //
475 // My solution: make a decent guess as to th 460 // My solution: make a decent guess as to the one or
476 // two potential faces might get intersected 461 // two potential faces might get intersected, and then
477 // test them. If we have the wrong face, use 462 // test them. If we have the wrong face, use the test
478 // to make a better guess. 463 // to make a better guess.
479 // 464 //
480 // Since we might have two guesses, form a q 465 // Since we might have two guesses, form a queue of
481 // potential intersecting faces. Keep an arr 466 // potential intersecting faces. Keep an array of
482 // already tested faces to avoid doing one m 467 // already tested faces to avoid doing one more than
483 // once. 468 // once.
484 // 469 //
485 // Result: at worst, an iterative search. On 470 // Result: at worst, an iterative search. On average,
486 // a little more than two tests would be req 471 // a little more than two tests would be required.
487 // 472 //
488 G4ThreeVector q = p + v; 473 G4ThreeVector q = p + v;
489 474
490 G4int face = 0; 475 G4int face = 0;
491 G4PolyhedraSideVec* vec = vecs; << 476 G4PolyhedraSideVec *vec = vecs;
492 do // Loop checking, 13.08.2015, G.Cosmo << 477 do
493 { 478 {
494 // 479 //
495 // Correct normal? 480 // Correct normal?
496 // 481 //
497 G4double dotProd = normSign*v.dot(vec->nor 482 G4double dotProd = normSign*v.dot(vec->normal);
498 if (dotProd <= 0) continue; 483 if (dotProd <= 0) continue;
499 484
500 // 485 //
501 // Is this face in front of the point alon 486 // Is this face in front of the point along the trajectory?
502 // 487 //
503 G4ThreeVector delta = p - vec->center; 488 G4ThreeVector delta = p - vec->center;
504 distFromSurface = -normSign*delta.dot(vec- 489 distFromSurface = -normSign*delta.dot(vec->normal);
505 490
506 if (distFromSurface < -surfTolerance) cont 491 if (distFromSurface < -surfTolerance) continue;
507 492
508 // 493 //
509 // phi 494 // phi
510 // c -------- d ^ 495 // c -------- d ^
511 // | | | 496 // | | |
512 // a -------- b +---> r/z 497 // a -------- b +---> r/z
513 // 498 //
514 // 499 //
515 // Do we remain on this particular segment 500 // Do we remain on this particular segment?
516 // 501 //
517 G4ThreeVector qc = q - vec->edges[1]->corn 502 G4ThreeVector qc = q - vec->edges[1]->corner[0];
518 G4ThreeVector qd = q - vec->edges[1]->corn 503 G4ThreeVector qd = q - vec->edges[1]->corner[1];
519 504
520 if (normSign*qc.cross(qd).dot(v) < 0) cont 505 if (normSign*qc.cross(qd).dot(v) < 0) continue;
521 506
522 G4ThreeVector qa = q - vec->edges[0]->corn 507 G4ThreeVector qa = q - vec->edges[0]->corner[0];
523 G4ThreeVector qb = q - vec->edges[0]->corn 508 G4ThreeVector qb = q - vec->edges[0]->corner[1];
524 509
525 if (normSign*qa.cross(qb).dot(v) > 0) cont 510 if (normSign*qa.cross(qb).dot(v) > 0) continue;
526 511
527 // 512 //
528 // We found the one and only segment we mi 513 // We found the one and only segment we might be intersecting.
529 // Do we remain within r/z bounds? 514 // Do we remain within r/z bounds?
530 // 515 //
531 516
532 if (r[0] > 1/kInfinity && normSign*qa.cros 517 if (r[0] > 1/kInfinity && normSign*qa.cross(qc).dot(v) < 0) return false;
533 if (r[1] > 1/kInfinity && normSign*qb.cros 518 if (r[1] > 1/kInfinity && normSign*qb.cross(qd).dot(v) > 0) return false;
534 519
535 // 520 //
536 // We allow the face to be slightly behind 521 // We allow the face to be slightly behind the trajectory
537 // (surface tolerance) only if the point p 522 // (surface tolerance) only if the point p is within
538 // the vicinity of the face 523 // the vicinity of the face
539 // 524 //
540 if (distFromSurface < 0) 525 if (distFromSurface < 0)
541 { 526 {
542 G4ThreeVector ps = p - vec->center; 527 G4ThreeVector ps = p - vec->center;
543 528
544 G4double rz = ps.dot(vec->surfRZ); 529 G4double rz = ps.dot(vec->surfRZ);
545 if (std::fabs(rz) > lenRZ+surfTolerance) 530 if (std::fabs(rz) > lenRZ+surfTolerance) return false;
546 531
547 G4double pp = ps.dot(vec->surfPhi); 532 G4double pp = ps.dot(vec->surfPhi);
548 if (std::fabs(pp) > lenPhi[0]+lenPhi[1]* << 533 if (std::fabs(pp) > lenPhi[0] + lenPhi[1]*rz + surfTolerance) return false;
549 } 534 }
550 535
551 536
552 // 537 //
553 // Intersection found. Return answer. 538 // Intersection found. Return answer.
554 // 539 //
555 distance = distFromSurface/dotProd; 540 distance = distFromSurface/dotProd;
556 normal = vec->normal; 541 normal = vec->normal;
557 isAllBehind = allBehind; 542 isAllBehind = allBehind;
558 return true; 543 return true;
559 } while( ++vec, ++face < numSide ); 544 } while( ++vec, ++face < numSide );
560 545
561 // 546 //
562 // Oh well. Better luck next time. 547 // Oh well. Better luck next time.
563 // 548 //
564 return false; 549 return false;
565 } 550 }
566 551
567 // Distance << 552
568 // << 553 G4double G4PolyhedraSide::Distance( const G4ThreeVector &p, G4bool outgoing )
569 G4double G4PolyhedraSide::Distance( const G4Th <<
570 { 554 {
571 G4double normSign = outgoing ? -1 : +1; 555 G4double normSign = outgoing ? -1 : +1;
572 556
573 // 557 //
574 // Try the closest phi segment first 558 // Try the closest phi segment first
575 // 559 //
576 G4int iPhi = ClosestPhiSegment( GetPhi(p) ); << 560 G4int iPhi = ClosestPhiSegment( p.phi() );
577 561
578 G4ThreeVector pdotc = p - vecs[iPhi].center; 562 G4ThreeVector pdotc = p - vecs[iPhi].center;
579 G4double normDist = pdotc.dot(vecs[iPhi].nor 563 G4double normDist = pdotc.dot(vecs[iPhi].normal);
580 564
581 if (normSign*normDist > -0.5*kCarTolerance) 565 if (normSign*normDist > -0.5*kCarTolerance)
582 { 566 {
583 return DistanceAway( p, vecs[iPhi], &normD 567 return DistanceAway( p, vecs[iPhi], &normDist );
584 } 568 }
585 569
586 // 570 //
587 // Now we have an interesting problem... do 571 // Now we have an interesting problem... do we try to find the
588 // closest facing side?? 572 // closest facing side??
589 // 573 //
590 // Considered carefully, the answer is no. W 574 // Considered carefully, the answer is no. We know that if we
591 // are asking for the distance out, we are s 575 // are asking for the distance out, we are supposed to be inside,
592 // and vice versa. 576 // and vice versa.
593 // 577 //
594 578
595 return kInfinity; 579 return kInfinity;
596 } 580 }
597 581
>> 582
>> 583 //
598 // Inside 584 // Inside
599 // 585 //
600 EInside G4PolyhedraSide::Inside( const G4Three << 586 EInside G4PolyhedraSide::Inside( const G4ThreeVector &p,
601 G4doubl 587 G4double tolerance,
602 G4doubl << 588 G4double *bestDistance )
603 { 589 {
604 // 590 //
605 // Which phi segment is closest to this poin 591 // Which phi segment is closest to this point?
606 // 592 //
607 G4int iPhi = ClosestPhiSegment( GetPhi(p) ); << 593 G4int iPhi = ClosestPhiSegment( p.phi() );
608 594
609 G4double norm; 595 G4double norm;
610 596
611 // 597 //
612 // Get distance to this segment 598 // Get distance to this segment
613 // 599 //
614 *bestDistance = DistanceToOneSide( p, vecs[i 600 *bestDistance = DistanceToOneSide( p, vecs[iPhi], &norm );
615 601
616 // 602 //
617 // Use distance along normal to decide retur 603 // Use distance along normal to decide return value
618 // 604 //
619 if ( (std::fabs(norm) > tolerance) || (*best << 605 if ( (std::fabs(norm) < tolerance) && (*bestDistance < 2.0*tolerance) )
620 return (norm < 0) ? kInside : kOutside; <<
621 else <<
622 return kSurface; 606 return kSurface;
>> 607 else if (norm < 0)
>> 608 return kInside;
>> 609 else
>> 610 return kOutside;
623 } 611 }
624 612
>> 613
>> 614 //
625 // Normal 615 // Normal
626 // 616 //
627 G4ThreeVector G4PolyhedraSide::Normal( const G << 617 G4ThreeVector G4PolyhedraSide::Normal( const G4ThreeVector &p,
628 G << 618 G4double *bestDistance )
629 { 619 {
630 // 620 //
631 // Which phi segment is closest to this poin 621 // Which phi segment is closest to this point?
632 // 622 //
633 G4int iPhi = ClosestPhiSegment( GetPhi(p) ); << 623 G4int iPhi = ClosestPhiSegment( p.phi() );
634 624
635 // 625 //
636 // Get distance to this segment 626 // Get distance to this segment
637 // 627 //
638 G4double norm; 628 G4double norm;
639 *bestDistance = DistanceToOneSide( p, vecs[i 629 *bestDistance = DistanceToOneSide( p, vecs[iPhi], &norm );
640 630
641 return vecs[iPhi].normal; 631 return vecs[iPhi].normal;
642 } 632 }
643 633
>> 634
>> 635 //
644 // Extent 636 // Extent
645 // 637 //
646 G4double G4PolyhedraSide::Extent( const G4Thre 638 G4double G4PolyhedraSide::Extent( const G4ThreeVector axis )
647 { 639 {
648 if (axis.perp2() < DBL_MIN) 640 if (axis.perp2() < DBL_MIN)
649 { 641 {
650 // 642 //
651 // Special case 643 // Special case
652 // 644 //
653 return axis.z() < 0 ? -cone->ZLo() : cone- 645 return axis.z() < 0 ? -cone->ZLo() : cone->ZHi();
654 } 646 }
655 647
656 G4int iPhi, i1, i2; 648 G4int iPhi, i1, i2;
657 G4double best; 649 G4double best;
658 G4ThreeVector* list[4]; << 650 G4ThreeVector *list[4];
659 651
660 // 652 //
661 // Which phi segment, if any, does the axis 653 // Which phi segment, if any, does the axis belong to
662 // 654 //
663 iPhi = PhiSegment( GetPhi(axis) ); << 655 iPhi = PhiSegment( axis.phi() );
664 656
665 if (iPhi < 0) 657 if (iPhi < 0)
666 { 658 {
667 // 659 //
668 // No phi segment? Check front edge of fir 660 // No phi segment? Check front edge of first side and
669 // last edge of second side 661 // last edge of second side
670 // 662 //
671 i1 = 0; i2 = numSide-1; 663 i1 = 0; i2 = numSide-1;
672 } 664 }
673 else 665 else
674 { 666 {
675 // 667 //
676 // Check all corners of matching phi side 668 // Check all corners of matching phi side
677 // 669 //
678 i1 = iPhi; i2 = iPhi; 670 i1 = iPhi; i2 = iPhi;
679 } 671 }
680 672
681 list[0] = vecs[i1].edges[0]->corner; 673 list[0] = vecs[i1].edges[0]->corner;
682 list[1] = vecs[i1].edges[0]->corner+1; 674 list[1] = vecs[i1].edges[0]->corner+1;
683 list[2] = vecs[i2].edges[1]->corner; 675 list[2] = vecs[i2].edges[1]->corner;
684 list[3] = vecs[i2].edges[1]->corner+1; 676 list[3] = vecs[i2].edges[1]->corner+1;
685 677
686 // 678 //
687 // Who's biggest? 679 // Who's biggest?
688 // 680 //
689 best = -kInfinity; 681 best = -kInfinity;
690 G4ThreeVector** vec = list; << 682 G4ThreeVector **vec = list;
691 do // Loop checking, 13.08.2015, G.Cosmo << 683 do
692 { 684 {
693 G4double answer = (*vec)->dot(axis); 685 G4double answer = (*vec)->dot(axis);
694 if (answer > best) best = answer; 686 if (answer > best) best = answer;
695 } while( ++vec < list+4 ); 687 } while( ++vec < list+4 );
696 688
697 return best; 689 return best;
698 } 690 }
699 691
>> 692
>> 693 //
700 // CalculateExtent 694 // CalculateExtent
701 // 695 //
702 // See notes in G4VCSGface 696 // See notes in G4VCSGface
703 // 697 //
704 void G4PolyhedraSide::CalculateExtent( const E 698 void G4PolyhedraSide::CalculateExtent( const EAxis axis,
705 const G << 699 const G4VoxelLimits &voxelLimit,
706 const G << 700 const G4AffineTransform &transform,
707 G << 701 G4SolidExtentList &extentList )
708 { 702 {
709 // 703 //
710 // Loop over all sides 704 // Loop over all sides
711 // 705 //
712 G4PolyhedraSideVec *vec = vecs; 706 G4PolyhedraSideVec *vec = vecs;
713 do // Loop checking, 13.08.2015, G.Cosmo << 707 do
714 { 708 {
715 // 709 //
716 // Fill our polygon with the four corners 710 // Fill our polygon with the four corners of
717 // this side, after the specified transfor 711 // this side, after the specified transformation
718 // 712 //
719 G4ClippablePolygon polygon; 713 G4ClippablePolygon polygon;
720 714
721 polygon.AddVertexInOrder(transform. 715 polygon.AddVertexInOrder(transform.
722 TransformPoint(ve 716 TransformPoint(vec->edges[0]->corner[0]));
723 polygon.AddVertexInOrder(transform. 717 polygon.AddVertexInOrder(transform.
724 TransformPoint(ve 718 TransformPoint(vec->edges[0]->corner[1]));
725 polygon.AddVertexInOrder(transform. 719 polygon.AddVertexInOrder(transform.
726 TransformPoint(ve 720 TransformPoint(vec->edges[1]->corner[1]));
727 polygon.AddVertexInOrder(transform. 721 polygon.AddVertexInOrder(transform.
728 TransformPoint(ve 722 TransformPoint(vec->edges[1]->corner[0]));
729 723
730 // 724 //
731 // Get extent 725 // Get extent
732 // 726 //
733 if (polygon.PartialClip( voxelLimit, axis 727 if (polygon.PartialClip( voxelLimit, axis ))
734 { 728 {
735 // 729 //
736 // Get dot product of normal along targe 730 // Get dot product of normal along target axis
737 // 731 //
738 polygon.SetNormal( transform.TransformAx 732 polygon.SetNormal( transform.TransformAxis(vec->normal) );
739 733
740 extentList.AddSurface( polygon ); 734 extentList.AddSurface( polygon );
741 } 735 }
742 } while( ++vec < vecs+numSide ); 736 } while( ++vec < vecs+numSide );
743 737
744 return; 738 return;
745 } 739 }
746 740
>> 741
>> 742 //
747 // IntersectSidePlane 743 // IntersectSidePlane
748 // 744 //
749 // Decide if a line correctly intersects one s 745 // Decide if a line correctly intersects one side plane of our segment.
750 // It is assumed that the correct side has bee 746 // It is assumed that the correct side has been chosen, and thus only
751 // the z bounds (of the entire segment) are ch 747 // the z bounds (of the entire segment) are checked.
752 // 748 //
753 // normSign - To be multiplied against normal: 749 // normSign - To be multiplied against normal:
754 // = +1.0 normal is unchanged 750 // = +1.0 normal is unchanged
755 // = -1.0 normal is reversed (now p 751 // = -1.0 normal is reversed (now points inward)
756 // 752 //
757 // Arguments: 753 // Arguments:
758 // p - (in) Point 754 // p - (in) Point
759 // v - (in) Direction 755 // v - (in) Direction
760 // vec - (in) Description record of the si 756 // vec - (in) Description record of the side plane
761 // normSign - (in) Sign (+/- 1) to apply to 757 // normSign - (in) Sign (+/- 1) to apply to normal
762 // surfTolerance - (in) Surface tolerance (g 758 // surfTolerance - (in) Surface tolerance (generally > 0, see below)
763 // distance - (out) Distance along v to inte 759 // distance - (out) Distance along v to intersection
764 // distFromSurface - (out) Distance from surf 760 // distFromSurface - (out) Distance from surface normal
765 // 761 //
766 // Notes: 762 // Notes:
767 // surfTolerance - Used to decide if a poin 763 // surfTolerance - Used to decide if a point is behind the surface,
768 // a point is allow to be -surfToleranc 764 // a point is allow to be -surfTolerance behind the
769 // surface (as measured along the norma 765 // surface (as measured along the normal), but *only*
770 // if the point is within the r/z bound 766 // if the point is within the r/z bounds + surfTolerance
771 // of the segment. 767 // of the segment.
772 // 768 //
773 G4bool G4PolyhedraSide::IntersectSidePlane( co << 769 G4bool G4PolyhedraSide::IntersectSidePlane( const G4ThreeVector &p,
774 co << 770 const G4ThreeVector &v,
775 co << 771 const G4PolyhedraSideVec vec,
776 772 G4double normSign,
777 773 G4double surfTolerance,
778 << 774 G4double &distance,
779 << 775 G4double &distFromSurface )
780 { 776 {
781 // 777 //
782 // Correct normal? Here we have straight sid 778 // Correct normal? Here we have straight sides, and can safely ignore
783 // intersections where the dot product with 779 // intersections where the dot product with the normal is zero.
784 // 780 //
785 G4double dotProd = normSign*v.dot(vec.normal 781 G4double dotProd = normSign*v.dot(vec.normal);
786 782
787 if (dotProd <= 0) return false; 783 if (dotProd <= 0) return false;
788 784
789 // 785 //
790 // Calculate distance to surface. If the sid 786 // Calculate distance to surface. If the side is too far
791 // behind the point, we must reject it. 787 // behind the point, we must reject it.
792 // 788 //
793 G4ThreeVector delta = p - vec.center; 789 G4ThreeVector delta = p - vec.center;
794 distFromSurface = -normSign*delta.dot(vec.no 790 distFromSurface = -normSign*delta.dot(vec.normal);
795 791
796 if (distFromSurface < -surfTolerance) return 792 if (distFromSurface < -surfTolerance) return false;
797 793
798 // 794 //
799 // Calculate precise distance to intersectio 795 // Calculate precise distance to intersection with the side
800 // (along the trajectory, not normal to the 796 // (along the trajectory, not normal to the surface)
801 // 797 //
802 distance = distFromSurface/dotProd; 798 distance = distFromSurface/dotProd;
803 799
804 // 800 //
805 // Do we fall off the r/z extent of the segm 801 // Do we fall off the r/z extent of the segment?
806 // 802 //
807 // Calculate this very, very carefully! Why? 803 // Calculate this very, very carefully! Why?
808 // 1. If a RZ end is at R=0, you can 804 // 1. If a RZ end is at R=0, you can't miss!
809 // 2. If you just fall off in RZ, th 805 // 2. If you just fall off in RZ, the answer must
810 // be consistent with adjacent G4 806 // be consistent with adjacent G4PolyhedraSide faces.
811 // (2) implies that only variables used by o 807 // (2) implies that only variables used by other G4PolyhedraSide
812 // faces may be used, which includes only: p 808 // faces may be used, which includes only: p, v, and the edge corners.
813 // It also means that one side is a ">" or " 809 // It also means that one side is a ">" or "<", which the other
814 // must be ">=" or "<=". Fortunately, this i 810 // must be ">=" or "<=". Fortunately, this isn't a new problem.
815 // The solution below I borrowed from Joseph 811 // The solution below I borrowed from Joseph O'Rourke,
816 // "Computational Geometry in C (Second Edit 812 // "Computational Geometry in C (Second Edition)"
817 // See: http://cs.smith.edu/~orourke/ 813 // See: http://cs.smith.edu/~orourke/
818 // 814 //
819 G4ThreeVector ic = p + distance*v - vec.cent 815 G4ThreeVector ic = p + distance*v - vec.center;
820 G4double atRZ = vec.surfRZ.dot(ic); 816 G4double atRZ = vec.surfRZ.dot(ic);
821 817
822 if (atRZ < 0) 818 if (atRZ < 0)
823 { 819 {
824 if (r[0]==0) return true; // Can't miss 820 if (r[0]==0) return true; // Can't miss!
825 821
826 if (atRZ < -lenRZ*1.2) return false; // F 822 if (atRZ < -lenRZ*1.2) return false; // Forget it! Missed by a mile.
827 823
828 G4ThreeVector q = p + v; 824 G4ThreeVector q = p + v;
829 G4ThreeVector qa = q - vec.edges[0]->corne 825 G4ThreeVector qa = q - vec.edges[0]->corner[0],
830 qb = q - vec.edges[1]->corne 826 qb = q - vec.edges[1]->corner[0];
831 G4ThreeVector qacb = qa.cross(qb); 827 G4ThreeVector qacb = qa.cross(qb);
832 if (normSign*qacb.dot(v) < 0) return false 828 if (normSign*qacb.dot(v) < 0) return false;
833 829
834 if (distFromSurface < 0) 830 if (distFromSurface < 0)
835 { 831 {
836 if (atRZ < -lenRZ-surfTolerance) return 832 if (atRZ < -lenRZ-surfTolerance) return false;
837 } 833 }
838 } 834 }
839 else if (atRZ > 0) 835 else if (atRZ > 0)
840 { 836 {
841 if (r[1]==0) return true; // Can't miss 837 if (r[1]==0) return true; // Can't miss!
842 838
843 if (atRZ > lenRZ*1.2) return false; // Mi 839 if (atRZ > lenRZ*1.2) return false; // Missed by a mile
844 840
845 G4ThreeVector q = p + v; 841 G4ThreeVector q = p + v;
846 G4ThreeVector qa = q - vec.edges[0]->corne 842 G4ThreeVector qa = q - vec.edges[0]->corner[1],
847 qb = q - vec.edges[1]->corne 843 qb = q - vec.edges[1]->corner[1];
848 G4ThreeVector qacb = qa.cross(qb); 844 G4ThreeVector qacb = qa.cross(qb);
849 if (normSign*qacb.dot(v) >= 0) return fals 845 if (normSign*qacb.dot(v) >= 0) return false;
850 846
851 if (distFromSurface < 0) 847 if (distFromSurface < 0)
852 { 848 {
853 if (atRZ > lenRZ+surfTolerance) return f 849 if (atRZ > lenRZ+surfTolerance) return false;
854 } 850 }
855 } 851 }
856 852
857 return true; 853 return true;
858 } 854 }
859 855
>> 856
>> 857 //
860 // LineHitsSegments 858 // LineHitsSegments
861 // 859 //
862 // Calculate which phi segments a line interse 860 // Calculate which phi segments a line intersects in three dimensions.
863 // No check is made as to whether the intersec 861 // No check is made as to whether the intersections are within the z bounds of
864 // the segment. 862 // the segment.
865 // 863 //
866 G4int G4PolyhedraSide::LineHitsSegments( const << 864 G4int G4PolyhedraSide::LineHitsSegments( const G4ThreeVector &p,
867 const << 865 const G4ThreeVector &v,
868 << 866 G4int *i1, G4int *i2 )
869 { 867 {
870 G4double s1, s2; 868 G4double s1, s2;
871 // 869 //
872 // First, decide if and where the line inter 870 // First, decide if and where the line intersects the cone
873 // 871 //
874 G4int n = cone->LineHitsCone( p, v, &s1, &s2 872 G4int n = cone->LineHitsCone( p, v, &s1, &s2 );
875 873
876 if (n==0) return 0; 874 if (n==0) return 0;
877 875
878 // 876 //
879 // Try first intersection. 877 // Try first intersection.
880 // 878 //
881 *i1 = PhiSegment( std::atan2( p.y() + s1*v.y 879 *i1 = PhiSegment( std::atan2( p.y() + s1*v.y(), p.x() + s1*v.x() ) );
882 if (n==1) 880 if (n==1)
883 { 881 {
884 return (*i1 < 0) ? 0 : 1; 882 return (*i1 < 0) ? 0 : 1;
885 } 883 }
886 884
887 // 885 //
888 // Try second intersection 886 // Try second intersection
889 // 887 //
890 *i2 = PhiSegment( std::atan2( p.y() + s2*v.y 888 *i2 = PhiSegment( std::atan2( p.y() + s2*v.y(), p.x() + s2*v.x() ) );
891 if (*i1 == *i2) return 0; 889 if (*i1 == *i2) return 0;
892 890
893 if (*i1 < 0) 891 if (*i1 < 0)
894 { 892 {
895 if (*i2 < 0) return 0; 893 if (*i2 < 0) return 0;
896 *i1 = *i2; 894 *i1 = *i2;
897 return 1; 895 return 1;
898 } 896 }
899 897
900 if (*i2 < 0) return 1; 898 if (*i2 < 0) return 1;
901 899
902 return 2; 900 return 2;
903 } 901 }
904 902
>> 903
>> 904 //
905 // ClosestPhiSegment 905 // ClosestPhiSegment
906 // 906 //
907 // Decide which phi segment is closest in phi 907 // Decide which phi segment is closest in phi to the point.
908 // The result is the same as PhiSegment if the 908 // The result is the same as PhiSegment if there is no phi opening.
909 // 909 //
910 G4int G4PolyhedraSide::ClosestPhiSegment( G4do 910 G4int G4PolyhedraSide::ClosestPhiSegment( G4double phi0 )
911 { 911 {
912 G4int iPhi = PhiSegment( phi0 ); 912 G4int iPhi = PhiSegment( phi0 );
913 if (iPhi >= 0) return iPhi; 913 if (iPhi >= 0) return iPhi;
914 914
915 // 915 //
916 // Boogers! The points falls inside the phi 916 // Boogers! The points falls inside the phi segment.
917 // Look for the closest point: the start, or 917 // Look for the closest point: the start, or end
918 // 918 //
919 G4double phi = phi0; 919 G4double phi = phi0;
920 920
921 while( phi < startPhi ) // Loop checking, << 921 while( phi < startPhi ) phi += twopi;
922 phi += twopi; <<
923 G4double d1 = phi-endPhi; 922 G4double d1 = phi-endPhi;
924 923
925 while( phi > startPhi ) // Loop checking, << 924 while( phi > startPhi ) phi -= twopi;
926 phi -= twopi; <<
927 G4double d2 = startPhi-phi; 925 G4double d2 = startPhi-phi;
928 926
929 return (d2 < d1) ? 0 : numSide-1; 927 return (d2 < d1) ? 0 : numSide-1;
930 } 928 }
931 929
>> 930
>> 931 //
932 // PhiSegment 932 // PhiSegment
933 // 933 //
934 // Decide which phi segment an angle belongs t 934 // Decide which phi segment an angle belongs to, counting from zero.
935 // A value of -1 indicates that the phi value 935 // A value of -1 indicates that the phi value is outside the shape
936 // (only possible if phiTotal < 360 degrees). 936 // (only possible if phiTotal < 360 degrees).
937 // 937 //
938 G4int G4PolyhedraSide::PhiSegment( G4double ph 938 G4int G4PolyhedraSide::PhiSegment( G4double phi0 )
939 { 939 {
940 // 940 //
941 // How far are we from phiStart? Come up wit 941 // How far are we from phiStart? Come up with a positive answer
942 // that is less than 2*PI 942 // that is less than 2*PI
943 // 943 //
944 G4double phi = phi0 - startPhi; 944 G4double phi = phi0 - startPhi;
945 while( phi < 0 ) // Loop checking, 13.08. << 945 while( phi < 0 ) phi += twopi;
946 phi += twopi; << 946 while( phi > twopi ) phi -= twopi;
947 while( phi > twopi ) // Loop checking, 13 <<
948 phi -= twopi; <<
949 947
950 // 948 //
951 // Divide 949 // Divide
952 // 950 //
953 auto answer = (G4int)(phi/deltaPhi); << 951 G4int answer = (G4int)(phi/deltaPhi);
954 952
955 if (answer >= numSide) 953 if (answer >= numSide)
956 { 954 {
957 if (phiIsOpen) 955 if (phiIsOpen)
958 { 956 {
959 return -1; // Looks like we missed 957 return -1; // Looks like we missed
960 } 958 }
961 else 959 else
962 { 960 {
963 answer = numSide-1; // Probably just ro 961 answer = numSide-1; // Probably just roundoff
964 } 962 }
965 } 963 }
966 964
967 return answer; 965 return answer;
968 } 966 }
969 967
970 // GetPhi <<
971 // <<
972 // Calculate Phi for a given 3-vector (point), <<
973 // same point, in the attempt to avoid consecu <<
974 // quantity <<
975 // <<
976 G4double G4PolyhedraSide::GetPhi( const G4Thre <<
977 { <<
978 G4double val=0.; <<
979 G4ThreeVector vphi(G4MT_phphix, G4MT_phphiy, <<
980 <<
981 if (vphi != p) <<
982 { <<
983 val = p.phi(); <<
984 G4MT_phphix = p.x(); G4MT_phphiy = p.y(); <<
985 G4MT_phphik = val; <<
986 } <<
987 else <<
988 { <<
989 val = G4MT_phphik; <<
990 } <<
991 return val; <<
992 } <<
993 968
>> 969 //
994 // DistanceToOneSide 970 // DistanceToOneSide
995 // 971 //
996 // Arguments: 972 // Arguments:
997 // p - (in) Point to check 973 // p - (in) Point to check
998 // vec - (in) vector set of this side 974 // vec - (in) vector set of this side
999 // normDist - (out) distance normal to the si 975 // normDist - (out) distance normal to the side or edge, as appropriate, signed
1000 // Return value = total distance from the sid 976 // Return value = total distance from the side
1001 // 977 //
1002 G4double G4PolyhedraSide::DistanceToOneSide( << 978 G4double G4PolyhedraSide::DistanceToOneSide( const G4ThreeVector &p,
1003 << 979 const G4PolyhedraSideVec &vec,
1004 << 980 G4double *normDist )
1005 { 981 {
1006 G4ThreeVector pct = p - vec.center; << 982 G4ThreeVector pc = p - vec.center;
1007 983
1008 // 984 //
1009 // Get normal distance 985 // Get normal distance
1010 // 986 //
1011 *normDist = vec.normal.dot(pct); << 987 *normDist = vec.normal.dot(pc);
1012 988
1013 // 989 //
1014 // Add edge penalty 990 // Add edge penalty
1015 // 991 //
1016 return DistanceAway( p, vec, normDist ); 992 return DistanceAway( p, vec, normDist );
1017 } 993 }
1018 994
>> 995
>> 996 //
1019 // DistanceAway 997 // DistanceAway
1020 // 998 //
1021 // Add distance from side edges, if necessary << 999 // Add distance from side edges, if necesssary, to total distance,
1022 // and updates normDist appropriate depending 1000 // and updates normDist appropriate depending on edge normals.
1023 // 1001 //
1024 G4double G4PolyhedraSide::DistanceAway( const << 1002 G4double G4PolyhedraSide::DistanceAway( const G4ThreeVector &p,
1025 const << 1003 const G4PolyhedraSideVec &vec,
1026 << 1004 G4double *normDist )
1027 { 1005 {
1028 G4double distOut2; 1006 G4double distOut2;
1029 G4ThreeVector pct = p - vec.center; << 1007 G4ThreeVector pc = p - vec.center;
1030 G4double distFaceNorm = *normDist; 1008 G4double distFaceNorm = *normDist;
1031 1009
1032 // 1010 //
1033 // Okay, are we inside bounds? 1011 // Okay, are we inside bounds?
1034 // 1012 //
1035 G4double pcDotRZ = pct.dot(vec.surfRZ); << 1013 G4double pcDotRZ = pc.dot(vec.surfRZ);
1036 G4double pcDotPhi = pct.dot(vec.surfPhi); << 1014 G4double pcDotPhi = pc.dot(vec.surfPhi);
1037 1015
1038 // 1016 //
1039 // Go through all permutations. 1017 // Go through all permutations.
1040 // 1018 // Phi
1041 // | | 1019 // | | ^
1042 // B | H | E 1020 // B | H | E |
1043 // ------[1]------------[3]----- 1021 // ------[1]------------[3]----- |
1044 // |XXXXXXXXXXXXXX| 1022 // |XXXXXXXXXXXXXX| +----> RZ
1045 // C |XXXXXXXXXXXXXX| F 1023 // C |XXXXXXXXXXXXXX| F
1046 // |XXXXXXXXXXXXXX| 1024 // |XXXXXXXXXXXXXX|
1047 // ------[0]------------[2]---- 1025 // ------[0]------------[2]----
1048 // A | G | D 1026 // A | G | D
1049 // | | 1027 // | |
1050 // 1028 //
1051 // It's real messy, but at least it's quick 1029 // It's real messy, but at least it's quick
1052 // 1030 //
1053 1031
1054 if (pcDotRZ < -lenRZ) 1032 if (pcDotRZ < -lenRZ)
1055 { 1033 {
1056 G4double lenPhiZ = lenPhi[0] - lenRZ*lenP 1034 G4double lenPhiZ = lenPhi[0] - lenRZ*lenPhi[1];
1057 G4double distOutZ = pcDotRZ+lenRZ; 1035 G4double distOutZ = pcDotRZ+lenRZ;
1058 // 1036 //
1059 // Below in RZ 1037 // Below in RZ
1060 // 1038 //
1061 if (pcDotPhi < -lenPhiZ) 1039 if (pcDotPhi < -lenPhiZ)
1062 { 1040 {
1063 // 1041 //
1064 // ...and below in phi. Find distance t 1042 // ...and below in phi. Find distance to point (A)
1065 // 1043 //
1066 G4double distOutPhi = pcDotPhi+lenPhiZ; 1044 G4double distOutPhi = pcDotPhi+lenPhiZ;
1067 distOut2 = distOutPhi*distOutPhi + dist 1045 distOut2 = distOutPhi*distOutPhi + distOutZ*distOutZ;
1068 G4ThreeVector pa = p - vec.edges[0]->co 1046 G4ThreeVector pa = p - vec.edges[0]->corner[0];
1069 *normDist = pa.dot(vec.edges[0]->cornNo 1047 *normDist = pa.dot(vec.edges[0]->cornNorm[0]);
1070 } 1048 }
1071 else if (pcDotPhi > lenPhiZ) 1049 else if (pcDotPhi > lenPhiZ)
1072 { 1050 {
1073 // 1051 //
1074 // ...and above in phi. Find distance t 1052 // ...and above in phi. Find distance to point (B)
1075 // 1053 //
1076 G4double distOutPhi = pcDotPhi-lenPhiZ; 1054 G4double distOutPhi = pcDotPhi-lenPhiZ;
1077 distOut2 = distOutPhi*distOutPhi + dist 1055 distOut2 = distOutPhi*distOutPhi + distOutZ*distOutZ;
1078 G4ThreeVector pb = p - vec.edges[1]->co 1056 G4ThreeVector pb = p - vec.edges[1]->corner[0];
1079 *normDist = pb.dot(vec.edges[1]->cornNo 1057 *normDist = pb.dot(vec.edges[1]->cornNorm[0]);
1080 } 1058 }
1081 else 1059 else
1082 { 1060 {
1083 // 1061 //
1084 // ...and inside in phi. Find distance 1062 // ...and inside in phi. Find distance to line (C)
1085 // 1063 //
1086 G4ThreeVector pa = p - vec.edges[0]->co 1064 G4ThreeVector pa = p - vec.edges[0]->corner[0];
1087 distOut2 = distOutZ*distOutZ; 1065 distOut2 = distOutZ*distOutZ;
1088 *normDist = pa.dot(vec.edgeNorm[0]); 1066 *normDist = pa.dot(vec.edgeNorm[0]);
1089 } 1067 }
1090 } 1068 }
1091 else if (pcDotRZ > lenRZ) 1069 else if (pcDotRZ > lenRZ)
1092 { 1070 {
1093 G4double lenPhiZ = lenPhi[0] + lenRZ*lenP 1071 G4double lenPhiZ = lenPhi[0] + lenRZ*lenPhi[1];
1094 G4double distOutZ = pcDotRZ-lenRZ; 1072 G4double distOutZ = pcDotRZ-lenRZ;
1095 // 1073 //
1096 // Above in RZ 1074 // Above in RZ
1097 // 1075 //
1098 if (pcDotPhi < -lenPhiZ) 1076 if (pcDotPhi < -lenPhiZ)
1099 { 1077 {
1100 // 1078 //
1101 // ...and below in phi. Find distance t 1079 // ...and below in phi. Find distance to point (D)
1102 // 1080 //
1103 G4double distOutPhi = pcDotPhi+lenPhiZ; 1081 G4double distOutPhi = pcDotPhi+lenPhiZ;
1104 distOut2 = distOutPhi*distOutPhi + dist 1082 distOut2 = distOutPhi*distOutPhi + distOutZ*distOutZ;
1105 G4ThreeVector pd = p - vec.edges[0]->co 1083 G4ThreeVector pd = p - vec.edges[0]->corner[1];
1106 *normDist = pd.dot(vec.edges[0]->cornNo 1084 *normDist = pd.dot(vec.edges[0]->cornNorm[1]);
1107 } 1085 }
1108 else if (pcDotPhi > lenPhiZ) 1086 else if (pcDotPhi > lenPhiZ)
1109 { 1087 {
1110 // 1088 //
1111 // ...and above in phi. Find distance t 1089 // ...and above in phi. Find distance to point (E)
1112 // 1090 //
1113 G4double distOutPhi = pcDotPhi-lenPhiZ; 1091 G4double distOutPhi = pcDotPhi-lenPhiZ;
1114 distOut2 = distOutPhi*distOutPhi + dist 1092 distOut2 = distOutPhi*distOutPhi + distOutZ*distOutZ;
1115 G4ThreeVector pe = p - vec.edges[1]->co 1093 G4ThreeVector pe = p - vec.edges[1]->corner[1];
1116 *normDist = pe.dot(vec.edges[1]->cornNo 1094 *normDist = pe.dot(vec.edges[1]->cornNorm[1]);
1117 } 1095 }
1118 else 1096 else
1119 { 1097 {
1120 // 1098 //
1121 // ...and inside in phi. Find distance 1099 // ...and inside in phi. Find distance to line (F)
1122 // 1100 //
1123 distOut2 = distOutZ*distOutZ; 1101 distOut2 = distOutZ*distOutZ;
1124 G4ThreeVector pd = p - vec.edges[0]->co 1102 G4ThreeVector pd = p - vec.edges[0]->corner[1];
1125 *normDist = pd.dot(vec.edgeNorm[1]); 1103 *normDist = pd.dot(vec.edgeNorm[1]);
1126 } 1104 }
1127 } 1105 }
1128 else 1106 else
1129 { 1107 {
1130 G4double lenPhiZ = lenPhi[0] + pcDotRZ*le 1108 G4double lenPhiZ = lenPhi[0] + pcDotRZ*lenPhi[1];
1131 // 1109 //
1132 // We are inside RZ bounds 1110 // We are inside RZ bounds
1133 // 1111 //
1134 if (pcDotPhi < -lenPhiZ) 1112 if (pcDotPhi < -lenPhiZ)
1135 { 1113 {
1136 // 1114 //
1137 // ...and below in phi. Find distance t 1115 // ...and below in phi. Find distance to line (G)
1138 // 1116 //
1139 G4double distOut = edgeNorm*(pcDotPhi+l 1117 G4double distOut = edgeNorm*(pcDotPhi+lenPhiZ);
1140 distOut2 = distOut*distOut; 1118 distOut2 = distOut*distOut;
1141 G4ThreeVector pd = p - vec.edges[0]->co 1119 G4ThreeVector pd = p - vec.edges[0]->corner[1];
1142 *normDist = pd.dot(vec.edges[0]->normal 1120 *normDist = pd.dot(vec.edges[0]->normal);
1143 } 1121 }
1144 else if (pcDotPhi > lenPhiZ) 1122 else if (pcDotPhi > lenPhiZ)
1145 { 1123 {
1146 // 1124 //
1147 // ...and above in phi. Find distance t 1125 // ...and above in phi. Find distance to line (H)
1148 // 1126 //
1149 G4double distOut = edgeNorm*(pcDotPhi-l 1127 G4double distOut = edgeNorm*(pcDotPhi-lenPhiZ);
1150 distOut2 = distOut*distOut; 1128 distOut2 = distOut*distOut;
1151 G4ThreeVector pe = p - vec.edges[1]->co 1129 G4ThreeVector pe = p - vec.edges[1]->corner[1];
1152 *normDist = pe.dot(vec.edges[1]->normal 1130 *normDist = pe.dot(vec.edges[1]->normal);
1153 } 1131 }
1154 else 1132 else
1155 { 1133 {
1156 // 1134 //
1157 // Inside bounds! No penalty. 1135 // Inside bounds! No penalty.
1158 // 1136 //
1159 return std::fabs(distFaceNorm); 1137 return std::fabs(distFaceNorm);
1160 } 1138 }
1161 } 1139 }
1162 return std::sqrt( distFaceNorm*distFaceNorm 1140 return std::sqrt( distFaceNorm*distFaceNorm + distOut2 );
1163 } <<
1164 <<
1165 // Calculation of surface area of a triangle. <<
1166 // At the same time a random point in the tri <<
1167 // <<
1168 G4double G4PolyhedraSide::SurfaceTriangle( co <<
1169 co <<
1170 co <<
1171 G4 <<
1172 { <<
1173 G4ThreeVector v, w; <<
1174 <<
1175 v = p3 - p1; <<
1176 w = p1 - p2; <<
1177 G4double lambda1 = G4UniformRand(); <<
1178 G4double lambda2 = lambda1*G4UniformRand(); <<
1179 <<
1180 *p4=p2 + lambda1*w + lambda2*v; <<
1181 return 0.5*(v.cross(w)).mag(); <<
1182 } <<
1183 <<
1184 // GetPointOnPlane <<
1185 // <<
1186 // Auxiliary method for GetPointOnSurface() <<
1187 // <<
1188 G4ThreeVector <<
1189 G4PolyhedraSide::GetPointOnPlane( const G4Thr <<
1190 const G4Thr <<
1191 G4double* A <<
1192 { <<
1193 G4double chose,aOne,aTwo; <<
1194 G4ThreeVector point1,point2; <<
1195 aOne = SurfaceTriangle(p0,p1,p2,&point1); <<
1196 aTwo = SurfaceTriangle(p2,p3,p0,&point2); <<
1197 *Area= aOne+aTwo; <<
1198 <<
1199 chose = G4UniformRand()*(aOne+aTwo); <<
1200 if( (chose>=0.) && (chose < aOne) ) <<
1201 { <<
1202 return (point1); <<
1203 } <<
1204 return (point2); <<
1205 } <<
1206 <<
1207 // SurfaceArea() <<
1208 // <<
1209 G4double G4PolyhedraSide::SurfaceArea() <<
1210 { <<
1211 if( fSurfaceArea==0. ) <<
1212 { <<
1213 // Define the variables <<
1214 // <<
1215 G4double area,areas; <<
1216 G4ThreeVector point1; <<
1217 G4ThreeVector v1,v2,v3,v4; <<
1218 G4PolyhedraSideVec* vec = vecs; <<
1219 areas=0.; <<
1220 <<
1221 // Do a loop on all SideEdge <<
1222 // <<
1223 do // Loop checking, 13.08.2015, G.Cos <<
1224 { <<
1225 // Define 4points for a Plane or Triang <<
1226 // <<
1227 v1=vec->edges[0]->corner[0]; <<
1228 v2=vec->edges[0]->corner[1]; <<
1229 v3=vec->edges[1]->corner[1]; <<
1230 v4=vec->edges[1]->corner[0]; <<
1231 point1=GetPointOnPlane(v1,v2,v3,v4,&are <<
1232 areas+=area; <<
1233 } while( ++vec < vecs + numSide); <<
1234 <<
1235 fSurfaceArea=areas; <<
1236 } <<
1237 return fSurfaceArea; <<
1238 } <<
1239 <<
1240 // GetPointOnFace() <<
1241 // <<
1242 G4ThreeVector G4PolyhedraSide::GetPointOnFace <<
1243 { <<
1244 // Define the variables <<
1245 // <<
1246 std::vector<G4double>areas; <<
1247 std::vector<G4ThreeVector>points; <<
1248 G4double area=0.; <<
1249 G4double result1; <<
1250 G4ThreeVector point1; <<
1251 G4ThreeVector v1,v2,v3,v4; <<
1252 G4PolyhedraSideVec* vec = vecs; <<
1253 <<
1254 // Do a loop on all SideEdge <<
1255 // <<
1256 do // Loop checking, 13.08.2015, G.Cosmo <<
1257 { <<
1258 // Define 4points for a Plane or Triangle <<
1259 // <<
1260 v1=vec->edges[0]->corner[0]; <<
1261 v2=vec->edges[0]->corner[1]; <<
1262 v3=vec->edges[1]->corner[1]; <<
1263 v4=vec->edges[1]->corner[0]; <<
1264 point1=GetPointOnPlane(v1,v2,v3,v4,&resul <<
1265 points.push_back(point1); <<
1266 areas.push_back(result1); <<
1267 area+=result1; <<
1268 } while( ++vec < vecs+numSide ); <<
1269 <<
1270 // Choose randomly one of the surfaces and <<
1271 // <<
1272 G4double chose = area*G4UniformRand(); <<
1273 G4double Achose1=0., Achose2=0.; <<
1274 G4int i=0; <<
1275 do // Loop checking, 13.08.2015, G.Cosmo <<
1276 { <<
1277 Achose2+=areas[i]; <<
1278 if(chose>=Achose1 && chose<Achose2) <<
1279 { <<
1280 point1=points[i] ; break; <<
1281 } <<
1282 ++i; Achose1=Achose2; <<
1283 } while( i<numSide ); <<
1284 <<
1285 return point1; <<
1286 } 1141 }
1287 1142