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26 // 26 //
27 // G4QuadrangularFacet class implementation. <<
28 // 27 //
29 // 31 October 2004 P R Truscott, QinetiQ Ltd, << 28 // $Id$
30 // 12 October 2012 M Gayer, CERN << 29 //
31 // New implementation reducing << 30 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
32 // and considerable CPU speedu << 31 //
33 // implementation of G4Tessell << 32 // CHANGE HISTORY
34 // 29 February 2016 E Tcherniaev, CERN << 33 // --------------
35 // Added exhaustive tests to c << 34 //
36 // quadrangular facet: colline << 35 // 31 October 2004, P R Truscott, QinetiQ Ltd, UK - Created.
37 // degenerate, concave or self << 36 // 12 October 2012, M Gayer, CERN
38 // ------------------------------------------- << 37 // New implementation reducing memory requirements by 50%,
>> 38 // and considerable CPU speedup together with the new
>> 39 // implementation of G4TessellatedSolid.
>> 40 //
>> 41 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 42
40 #include "G4QuadrangularFacet.hh" 43 #include "G4QuadrangularFacet.hh"
41 #include "geomdefs.hh" 44 #include "geomdefs.hh"
42 #include "Randomize.hh" 45 #include "Randomize.hh"
43 46
44 using namespace std; 47 using namespace std;
45 48
46 ////////////////////////////////////////////// 49 ///////////////////////////////////////////////////////////////////////////////
47 // 50 //
48 // Constructing two adjacent G4TriangularFacet << 51 // !!!THIS IS A FUDGE!!! IT'S TWO ADJACENT G4TRIANGULARFACETS
49 // Not efficient, but practical... << 52 // --- NOT EFFICIENT BUT PRACTICAL.
50 // 53 //
51 G4QuadrangularFacet::G4QuadrangularFacet (cons << 54 G4QuadrangularFacet::G4QuadrangularFacet (const G4ThreeVector &vt0,
52 cons << 55 const G4ThreeVector &vt1,
53 cons << 56 const G4ThreeVector &vt2,
54 cons << 57 const G4ThreeVector &vt3,
55 58 G4FacetVertexType vertexType)
56 { 59 {
57 G4double delta = 1.0 * kCarTolerance; // <<
58 G4double epsilon = 0.01 * kCarTolerance; // <<
59 <<
60 G4ThreeVector e1, e2, e3; 60 G4ThreeVector e1, e2, e3;
>> 61
61 SetVertex(0, vt0); 62 SetVertex(0, vt0);
62 if (vertexType == ABSOLUTE) 63 if (vertexType == ABSOLUTE)
63 { 64 {
64 SetVertex(1, vt1); 65 SetVertex(1, vt1);
65 SetVertex(2, vt2); 66 SetVertex(2, vt2);
66 SetVertex(3, vt3); 67 SetVertex(3, vt3);
67 68
68 e1 = vt1 - vt0; 69 e1 = vt1 - vt0;
69 e2 = vt2 - vt0; 70 e2 = vt2 - vt0;
70 e3 = vt3 - vt0; 71 e3 = vt3 - vt0;
71 } 72 }
72 else 73 else
73 { 74 {
74 SetVertex(1, vt0 + vt1); 75 SetVertex(1, vt0 + vt1);
75 SetVertex(2, vt0 + vt2); 76 SetVertex(2, vt0 + vt2);
76 SetVertex(3, vt0 + vt3); 77 SetVertex(3, vt0 + vt3);
77 78
78 e1 = vt1; 79 e1 = vt1;
79 e2 = vt2; 80 e2 = vt2;
80 e3 = vt3; 81 e3 = vt3;
81 } 82 }
82 << 83 G4double length1 = e1.mag();
83 // Check length of sides and diagonals << 84 G4double length2 = (GetVertex(2)-GetVertex(1)).mag();
84 // << 85 G4double length3 = (GetVertex(3)-GetVertex(2)).mag();
85 G4double leng1 = e1.mag(); << 86 G4double length4 = e3.mag();
86 G4double leng2 = (e2-e1).mag(); << 87
87 G4double leng3 = (e3-e2).mag(); << 88 G4ThreeVector normal1 = e1.cross(e2).unit();
88 G4double leng4 = e3.mag(); << 89 G4ThreeVector normal2 = e2.cross(e3).unit();
89 << 90
90 G4double diag1 = e2.mag(); << 91 bool isDefined = (length1 > kCarTolerance && length2 > kCarTolerance &&
91 G4double diag2 = (e3-e1).mag(); << 92 length3 > kCarTolerance && length4 > kCarTolerance &&
92 << 93 normal1.dot(normal2) >= 0.9999999999);
93 if (leng1 <= delta || leng2 <= delta || leng << 94
94 diag1 <= delta || diag2 <= delta) << 95 if (isDefined)
95 { << 96 {
96 ostringstream message; << 97 fFacet1 = G4TriangularFacet (GetVertex(0),GetVertex(1),
97 message << "Sides/diagonals of facet are t << 98 GetVertex(2),ABSOLUTE);
98 << "P0 = " << GetVertex(0) << G4en << 99 fFacet2 = G4TriangularFacet (GetVertex(0),GetVertex(2),
99 << "P1 = " << GetVertex(1) << G4en << 100 GetVertex(3),ABSOLUTE);
100 << "P2 = " << GetVertex(2) << G4en << 101
101 << "P3 = " << GetVertex(3) << G4en << 102 G4TriangularFacet facet3 (GetVertex(0),GetVertex(1),GetVertex(3),ABSOLUTE);
102 << "Side1 length (P0->P1) = " << l << 103 G4TriangularFacet facet4 (GetVertex(1),GetVertex(2),GetVertex(3),ABSOLUTE);
103 << "Side2 length (P1->P2) = " << l << 104
104 << "Side3 length (P2->P3) = " << l << 105 G4ThreeVector normal12 = fFacet1.GetSurfaceNormal()
105 << "Side4 length (P3->P0) = " << l << 106 + fFacet2.GetSurfaceNormal();
106 << "Diagonal1 length (P0->P2) = " << 107 G4ThreeVector normal34 = facet3.GetSurfaceNormal()
107 << "Diagonal2 length (P1->P3) = " << 108 + facet4.GetSurfaceNormal();
108 G4Exception("G4QuadrangularFacet::G4Quadra << 109 G4ThreeVector normal = 0.25 * (normal12 + normal34);
109 "GeomSolids1001", JustWarning, << 110
110 return; << 111 fFacet1.SetSurfaceNormal (normal);
111 } << 112 fFacet2.SetSurfaceNormal (normal);
112 << 113
113 // Check that vertices are not collinear << 114 G4ThreeVector vtmp = 0.5 * (e1 + e2);
114 // << 115 fCircumcentre = GetVertex(0) + vtmp;
115 G4double s1 = (e1.cross(e2)).mag()*0.5; << 116 G4double radiusSqr = vtmp.mag2();
116 G4double s2 = ((e2-e1).cross(e3-e2)).mag()*0 << 117 fRadius = std::sqrt(radiusSqr);
117 G4double s3 = (e2.cross(e3)).mag()*0.5; <<
118 G4double s4 = (e1.cross(e3)).mag()*0.5; <<
119 <<
120 G4double h1 = 2.*s1 / std::max(std::max(leng <<
121 G4double h2 = 2.*s2 / std::max(std::max(leng <<
122 G4double h3 = 2.*s3 / std::max(std::max(leng <<
123 G4double h4 = 2.*s4 / std::max(std::max(leng <<
124 <<
125 if (h1 <= delta || h2 <= delta || h3 <= delt <<
126 { <<
127 ostringstream message; <<
128 message << "Facet has three or more collin <<
129 << "P0 = " << GetVertex(0) << G4en <<
130 << "P1 = " << GetVertex(1) << G4en <<
131 << "P2 = " << GetVertex(2) << G4en <<
132 << "P3 = " << GetVertex(3) << G4en <<
133 << "Smallest heights:" << G4endl <<
134 << " in triangle P0-P1-P2 = " << <<
135 << " in triangle P1-P2-P3 = " << <<
136 << " in triangle P2-P3-P0 = " << <<
137 << " in triangle P3-P0-P1 = " << <<
138 G4Exception("G4QuadrangularFacet::G4Quadra <<
139 "GeomSolids1001", JustWarning, messa <<
140 return; <<
141 } <<
142 <<
143 // Check that vertices are coplanar by compu <<
144 // height of tetrahedron comprising of verti <<
145 // <<
146 G4double smax = std::max( std::max(s1,s2), s <<
147 G4double hmin = 0.5 * std::fabs( e1.dot(e2.c <<
148 if (hmin >= epsilon) <<
149 { <<
150 ostringstream message; <<
151 message << "Facet is not planar." << G4end <<
152 << "Disrepancy = " << hmin << G4en <<
153 << "P0 = " << GetVertex(0) << G4en <<
154 << "P1 = " << GetVertex(1) << G4en <<
155 << "P2 = " << GetVertex(2) << G4en <<
156 << "P3 = " << GetVertex(3); <<
157 G4Exception("G4QuadrangularFacet::G4Quadra <<
158 "GeomSolids1001", JustWarning, messa <<
159 return; <<
160 } 118 }
161 << 119 else
162 // Check that facet is convex by computing c <<
163 // of diagonals <<
164 // <<
165 G4ThreeVector normal = e2.cross(e3-e1); <<
166 G4double s = kInfinity, t = kInfinity, magni <<
167 if (magnitude2 > delta*delta) // check: magn <<
168 { <<
169 s = normal.dot(e1.cross(e3-e1)) / magnitud <<
170 t = normal.dot(e1.cross(e2)) / magnitud <<
171 } <<
172 if (s <= 0. || s >= 1. || t <= 0. || t >= 1. <<
173 { 120 {
174 ostringstream message; <<
175 message << "Facet is not convex." << G4end <<
176 << "Parameters of crosspoint of di <<
177 << s << " and " << t << G4endl <<
178 << "should both be within (0,1) ra <<
179 << "P0 = " << GetVertex(0) << G4endl <<
180 << "P1 = " << GetVertex(1) << G4endl <<
181 << "P2 = " << GetVertex(2) << G4endl <<
182 << "P3 = " << GetVertex(3); <<
183 G4Exception("G4QuadrangularFacet::G4Quadra 121 G4Exception("G4QuadrangularFacet::G4QuadrangularFacet()",
184 "GeomSolids1001", JustWarning, messa << 122 "GeomSolids0002", JustWarning,
185 return; << 123 "Length of sides of facet are too small or sides not planar.");
>> 124 G4cerr << endl;
>> 125 G4cerr << "P0 = " << GetVertex(0) << endl;
>> 126 G4cerr << "P1 = " << GetVertex(1) << endl;
>> 127 G4cerr << "P2 = " << GetVertex(2) << endl;
>> 128 G4cerr << "P3 = " << GetVertex(3) << endl;
>> 129 G4cerr << "Side lengths = P0->P1" << length1 << endl;
>> 130 G4cerr << "Side lengths = P1->P2" << length2 << endl;
>> 131 G4cerr << "Side lengths = P2->P3" << length3 << endl;
>> 132 G4cerr << "Side lengths = P3->P0" << length4 << endl;
>> 133 G4cerr << endl;
>> 134 fRadius = 0.0;
186 } 135 }
187 <<
188 // Define facet <<
189 // <<
190 fFacet1 = G4TriangularFacet(GetVertex(0),Get <<
191 fFacet2 = G4TriangularFacet(GetVertex(0),Get <<
192 <<
193 normal = normal.unit(); <<
194 fFacet1.SetSurfaceNormal(normal); <<
195 fFacet2.SetSurfaceNormal(normal); <<
196 <<
197 G4ThreeVector vtmp = 0.5 * (e1 + e2); <<
198 fCircumcentre = GetVertex(0) + vtmp; <<
199 G4double radiusSqr = vtmp.mag2(); <<
200 fRadius = std::sqrt(radiusSqr); <<
201 // 29.02.2016 Remark by E.Tcherniaev: comput <<
202 // of fCircumcenter and fRadius is wrong, ho <<
203 // it did not create any problem till now. <<
204 // Bizarre! Need to investigate! <<
205 } 136 }
206 137
207 ////////////////////////////////////////////// 138 ///////////////////////////////////////////////////////////////////////////////
208 // 139 //
209 G4QuadrangularFacet::~G4QuadrangularFacet () = << 140 G4QuadrangularFacet::~G4QuadrangularFacet ()
>> 141 {
>> 142 }
210 143
211 ////////////////////////////////////////////// 144 ///////////////////////////////////////////////////////////////////////////////
212 // 145 //
213 G4QuadrangularFacet::G4QuadrangularFacet (cons << 146 G4QuadrangularFacet::G4QuadrangularFacet (const G4QuadrangularFacet &rhs)
214 : G4VFacet(rhs) 147 : G4VFacet(rhs)
215 { 148 {
216 fFacet1 = rhs.fFacet1; 149 fFacet1 = rhs.fFacet1;
217 fFacet2 = rhs.fFacet2; 150 fFacet2 = rhs.fFacet2;
218 fRadius = 0.0; 151 fRadius = 0.0;
219 } 152 }
220 153
221 ////////////////////////////////////////////// 154 ///////////////////////////////////////////////////////////////////////////////
222 // 155 //
223 G4QuadrangularFacet & 156 G4QuadrangularFacet &
224 G4QuadrangularFacet::operator=(const G4Quadran << 157 G4QuadrangularFacet::operator=(const G4QuadrangularFacet &rhs)
225 { 158 {
226 if (this == &rhs) return *this; << 159 if (this == &rhs)
>> 160 return *this;
227 161
228 fFacet1 = rhs.fFacet1; 162 fFacet1 = rhs.fFacet1;
229 fFacet2 = rhs.fFacet2; 163 fFacet2 = rhs.fFacet2;
230 fRadius = 0.0; 164 fRadius = 0.0;
231 165
232 return *this; 166 return *this;
233 } 167 }
234 168
235 ////////////////////////////////////////////// 169 ///////////////////////////////////////////////////////////////////////////////
236 // 170 //
237 G4VFacet* G4QuadrangularFacet::GetClone () << 171 G4VFacet *G4QuadrangularFacet::GetClone ()
238 { 172 {
239 auto c = new G4QuadrangularFacet (GetVertex( << 173 G4QuadrangularFacet *c = new G4QuadrangularFacet (GetVertex(0), GetVertex(1),
240 GetVertex( << 174 GetVertex(2), GetVertex(3),
>> 175 ABSOLUTE);
241 return c; 176 return c;
242 } 177 }
243 178
244 ////////////////////////////////////////////// 179 ///////////////////////////////////////////////////////////////////////////////
245 // 180 //
246 G4ThreeVector G4QuadrangularFacet::Distance (c << 181 G4ThreeVector G4QuadrangularFacet::Distance (const G4ThreeVector &p)
247 { 182 {
248 G4ThreeVector v1 = fFacet1.Distance(p); 183 G4ThreeVector v1 = fFacet1.Distance(p);
249 G4ThreeVector v2 = fFacet2.Distance(p); 184 G4ThreeVector v2 = fFacet2.Distance(p);
250 185
251 if (v1.mag2() < v2.mag2()) return v1; 186 if (v1.mag2() < v2.mag2()) return v1;
252 else return v2; 187 else return v2;
253 } 188 }
254 189
255 ////////////////////////////////////////////// 190 ///////////////////////////////////////////////////////////////////////////////
256 // 191 //
257 G4double G4QuadrangularFacet::Distance (const << 192 G4double G4QuadrangularFacet::Distance (const G4ThreeVector &p,
258 193 G4double)
259 { 194 {
260 G4double dist = Distance(p).mag(); 195 G4double dist = Distance(p).mag();
261 return dist; 196 return dist;
262 } 197 }
263 198
264 ////////////////////////////////////////////// 199 ///////////////////////////////////////////////////////////////////////////////
265 // 200 //
266 G4double G4QuadrangularFacet::Distance (const << 201 G4double G4QuadrangularFacet::Distance (const G4ThreeVector &p, G4double,
267 const 202 const G4bool outgoing)
268 { 203 {
269 G4double dist; 204 G4double dist;
270 205
271 G4ThreeVector v = Distance(p); 206 G4ThreeVector v = Distance(p);
272 G4double dir = v.dot(GetSurfaceNormal()); 207 G4double dir = v.dot(GetSurfaceNormal());
273 if ( ((dir > dirTolerance) && (!outgoing)) 208 if ( ((dir > dirTolerance) && (!outgoing))
274 || ((dir < -dirTolerance) && outgoing)) 209 || ((dir < -dirTolerance) && outgoing))
275 dist = kInfinity; 210 dist = kInfinity;
276 else 211 else
277 dist = v.mag(); 212 dist = v.mag();
278 return dist; 213 return dist;
279 } 214 }
280 215
281 ////////////////////////////////////////////// 216 ///////////////////////////////////////////////////////////////////////////////
282 // 217 //
283 G4double G4QuadrangularFacet::Extent (const G4 218 G4double G4QuadrangularFacet::Extent (const G4ThreeVector axis)
284 { 219 {
285 G4double ss = 0; 220 G4double ss = 0;
286 221
287 for (G4int i = 0; i <= 3; ++i) 222 for (G4int i = 0; i <= 3; ++i)
288 { 223 {
289 G4double sp = GetVertex(i).dot(axis); 224 G4double sp = GetVertex(i).dot(axis);
290 if (sp > ss) ss = sp; 225 if (sp > ss) ss = sp;
291 } 226 }
292 return ss; 227 return ss;
293 } 228 }
294 229
295 ////////////////////////////////////////////// 230 ///////////////////////////////////////////////////////////////////////////////
296 // 231 //
297 G4bool G4QuadrangularFacet::Intersect (const G << 232 G4bool G4QuadrangularFacet::Intersect (const G4ThreeVector &p,
298 const G << 233 const G4ThreeVector &v,
299 G 234 G4bool outgoing,
300 G << 235 G4double &distance,
301 G << 236 G4double &distFromSurface,
302 G << 237 G4ThreeVector &normal)
303 { 238 {
304 G4bool intersect = 239 G4bool intersect =
305 fFacet1.Intersect(p,v,outgoing,distance,di 240 fFacet1.Intersect(p,v,outgoing,distance,distFromSurface,normal);
306 if (!intersect) intersect = 241 if (!intersect) intersect =
307 fFacet2.Intersect(p,v,outgoing,distance,di 242 fFacet2.Intersect(p,v,outgoing,distance,distFromSurface,normal);
308 if (!intersect) 243 if (!intersect)
309 { 244 {
310 distance = distFromSurface = kInfinity; 245 distance = distFromSurface = kInfinity;
311 normal.set(0,0,0); 246 normal.set(0,0,0);
312 } 247 }
313 return intersect; 248 return intersect;
314 } 249 }
315 250
316 ////////////////////////////////////////////// 251 ///////////////////////////////////////////////////////////////////////////////
317 // 252 //
318 // Auxiliary method to get a uniform random po << 253 // Auxiliary method to get a random point on surface
319 // 254 //
320 G4ThreeVector G4QuadrangularFacet::GetPointOnF 255 G4ThreeVector G4QuadrangularFacet::GetPointOnFace() const
321 { 256 {
322 G4double s1 = fFacet1.GetArea(); << 257 G4ThreeVector pr = (G4RandFlat::shoot(0.,1.) < 0.5)
323 G4double s2 = fFacet2.GetArea(); << 258 ? fFacet1.GetPointOnFace() : fFacet2.GetPointOnFace();
324 return ((s1+s2)*G4UniformRand() < s1) ? << 259 return pr;
325 fFacet1.GetPointOnFace() : fFacet2.GetPoin <<
326 } 260 }
327 261
328 ////////////////////////////////////////////// 262 ///////////////////////////////////////////////////////////////////////////////
329 // 263 //
330 // Auxiliary method for returning the surface 264 // Auxiliary method for returning the surface area
331 // 265 //
332 G4double G4QuadrangularFacet::GetArea() const << 266 G4double G4QuadrangularFacet::GetArea()
333 { 267 {
334 G4double area = fFacet1.GetArea() + fFacet2. 268 G4double area = fFacet1.GetArea() + fFacet2.GetArea();
335 return area; 269 return area;
336 } 270 }
337 271
338 ////////////////////////////////////////////// 272 ///////////////////////////////////////////////////////////////////////////////
339 // 273 //
340 G4String G4QuadrangularFacet::GetEntityType () 274 G4String G4QuadrangularFacet::GetEntityType () const
341 { 275 {
342 return "G4QuadrangularFacet"; 276 return "G4QuadrangularFacet";
343 } 277 }
344 278
345 ////////////////////////////////////////////// 279 ///////////////////////////////////////////////////////////////////////////////
346 // 280 //
347 G4ThreeVector G4QuadrangularFacet::GetSurfaceN 281 G4ThreeVector G4QuadrangularFacet::GetSurfaceNormal () const
348 { 282 {
349 return fFacet1.GetSurfaceNormal(); 283 return fFacet1.GetSurfaceNormal();
350 } 284 }
351 285