| 1 | // Copyright (c) 1995-1999 Matra Datavision |
| 2 | // Copyright (c) 1999-2012 OPEN CASCADE SAS |
| 3 | // |
| 4 | // The content of this file is subject to the Open CASCADE Technology Public |
| 5 | // License Version 6.5 (the "License"). You may not use the content of this file |
| 6 | // except in compliance with the License. Please obtain a copy of the License |
| 7 | // at http://www.opencascade.org and read it completely before using this file. |
| 8 | // |
| 9 | // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
| 10 | // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
| 11 | // |
| 12 | // The Original Code and all software distributed under the License is |
| 13 | // distributed on an "AS IS" basis, without warranty of any kind, and the |
| 14 | // Initial Developer hereby disclaims all such warranties, including without |
| 15 | // limitation, any warranties of merchantability, fitness for a particular |
| 16 | // purpose or non-infringement. Please see the License for the specific terms |
| 17 | // and conditions governing the rights and limitations under the License. |
| 18 | |
| 19 | |
| 20 | |
| 21 | #ifndef DEB |
| 22 | #define No_Standard_RangeError |
| 23 | #define No_Standard_OutOfRange |
| 24 | #endif |
| 25 | |
| 26 | // modified by NIZHNY-MKK Thu Nov 2 15:07:26 2000.BEGIN |
| 27 | static Standard_Boolean TestPassedSolutionWithNegativeState(const TColStd_SequenceOfInteger& etat, |
| 28 | const TColStd_SequenceOfReal& Umult, |
| 29 | const TColStd_SequenceOfReal& Vmult, |
| 30 | const TColStd_SequenceOfReal& ustart, |
| 31 | const TColStd_SequenceOfReal& vstart, |
| 32 | const Standard_Real& prevUp, |
| 33 | const Standard_Real& prevVp, |
| 34 | const TColStd_SequenceOfInteger& nbMultiplicities, |
| 35 | const math_Vector& tolerance, |
| 36 | TheIWFunction& sp, |
| 37 | math_Vector& UV, |
| 38 | Standard_Integer& Irang); |
| 39 | // modified by NIZHNY-MKK Thu Nov 2 15:07:39 2000.END |
| 40 | |
| 41 | |
| 42 | void IntWalk_IWalking::ComputeOpenLine(const TColStd_SequenceOfReal& Umult, |
| 43 | const TColStd_SequenceOfReal& Vmult, |
| 44 | const ThePOPIterator& Pnts1, |
| 45 | TheIWFunction& Func, |
| 46 | Standard_Boolean& Rajout) |
| 47 | |
| 48 | // Processing of open line. |
| 49 | // |
| 50 | // 1) for any starting point, which is not passing and not tangent and not yet processed, |
| 51 | // calculation of the step of advancement = step depending on the arrow and the maximum step. |
| 52 | // |
| 53 | // 2) calculate a point of approach (this point is on the tangent to the section |
| 54 | // of distance = no point in the interior) |
| 55 | // |
| 56 | // 3) conditions { |
| 57 | // (all calculated points do not exceed a point in the |
| 58 | // list of starting points) |
| 59 | // or |
| 60 | // (all points do not form an open line going |
| 61 | // from one border of the domain to the other or from a point tangent |
| 62 | // to border or from 2 tangent points : single cases) |
| 63 | // |
| 64 | // 1) framing of approached point on borders if necessary (there is |
| 65 | // calculation of step) |
| 66 | // 2) calculation of the point |
| 67 | // 3) if the point is not found the step is divided |
| 68 | // 4) stpo tests |
| 69 | // 5) calculation of the step depending on the arrow and the max step, |
| 70 | // (TestDeflection) |
| 71 | // stop possible. |
| 72 | // end of conditions. |
| 73 | |
| 74 | { |
| 75 | Standard_Integer I, N; |
| 76 | Standard_Real aBornInf[2], aBornSup[2], aUVap[2]; |
| 77 | math_Vector BornInf(aBornInf,1,2), BornSup(aBornSup,1,2), UVap(aUVap,1,2); |
| 78 | Standard_Real PasC, PasCu, PasCv; |
| 79 | Standard_Boolean Arrive; // shows if the line ends |
| 80 | Standard_Boolean Cadre; // shows if one is on border of the domain |
| 81 | Standard_Boolean ArretAjout; //shows if one is on added point |
| 82 | IntSurf_PntOn2S Psol; |
| 83 | Handle(IntWalk_TheIWLine) CurrentLine; // line under construction |
| 84 | Standard_Boolean Tgtend; |
| 85 | |
| 86 | IntWalk_StatusDeflection Status, StatusPrecedent; |
| 87 | |
| 88 | Standard_Integer NbDivision; |
| 89 | // number of divisions of step for each section |
| 90 | |
| 91 | Standard_Integer StepSign; |
| 92 | |
| 93 | ThePointOfPath PathPnt; |
| 94 | |
| 95 | BornInf(1) = Um; |
| 96 | BornSup(1) = UM; |
| 97 | BornInf(2) = Vm; |
| 98 | BornSup(2) = VM; |
| 99 | |
| 100 | math_FunctionSetRoot Rsnld(Func, tolerance); |
| 101 | Standard_Integer nbPath = Pnts1.Length(); |
| 102 | |
| 103 | // modified by NIZHNY-MKK Fri Oct 27 12:32:34 2000.BEGIN |
| 104 | TColStd_SequenceOfInteger movementdirectioninfo; |
| 105 | for (I = 1; I <= nbPath; I++) { |
| 106 | movementdirectioninfo.Append(0); |
| 107 | } |
| 108 | // modified by NIZHNY-MKK Fri Oct 27 12:32:38 2000.END |
| 109 | |
| 110 | for (I = 1; I <= nbPath; I++) { |
| 111 | //start point of the progression |
| 112 | // if (etat1(I) > 11) { |
| 113 | // modified by NIZHNY-MKK Fri Oct 27 12:33:37 2000.BEGIN |
| 114 | if ((etat1(I) > 11) || ((etat1(I) < -11) && (movementdirectioninfo(I)!=0))) { |
| 115 | // modified by NIZHNY-MKK Fri Oct 27 12:33:43 2000.END |
| 116 | PathPnt = Pnts1.Value(I); |
| 117 | CurrentLine = new IntWalk_TheIWLine (); |
| 118 | CurrentLine->SetTangencyAtBegining(Standard_False); |
| 119 | Tgtend = Standard_False; |
| 120 | CurrentLine->AddStatusFirst(Standard_False, Standard_True, I, PathPnt); |
| 121 | UVap(1) = ustart1(I); |
| 122 | UVap(2) = vstart1(I); |
| 123 | MakeWalkingPoint(11, UVap(1), UVap(2), Func, previousPoint); |
| 124 | previousd3d = Func.Direction3d(); |
| 125 | previousd2d = Func.Direction2d(); |
| 126 | CurrentLine->AddPoint(previousPoint); |
| 127 | // modified by NIZHNY-MKK Fri Oct 27 12:34:32 2000.BEGIN |
| 128 | if(movementdirectioninfo(I) !=0) { |
| 129 | if(movementdirectioninfo(I) < 0) { |
| 130 | StepSign = -1; |
| 131 | CurrentLine->SetTangentVector(previousd3d.Reversed(),1); |
| 132 | } else { |
| 133 | StepSign = 1; |
| 134 | CurrentLine->SetTangentVector(previousd3d,1); |
| 135 | } |
| 136 | } else { |
| 137 | Standard_Real tyutuyt=ThePointOfPathTool::Direction3d(PathPnt) * previousd3d; |
| 138 | if( tyutuyt < 0) { |
| 139 | StepSign = -1; |
| 140 | CurrentLine->SetTangentVector(previousd3d.Reversed(),1); |
| 141 | } |
| 142 | else { |
| 143 | StepSign = 1; |
| 144 | CurrentLine->SetTangentVector(previousd3d,1); |
| 145 | } |
| 146 | } |
| 147 | // modified by NIZHNY-MKK Fri Oct 27 12:34:37 2000.END |
| 148 | |
| 149 | // Modified by Sergey KHROMOV - Tue Nov 20 10:41:45 2001 Begin |
| 150 | etat1(I) = - abs(etat1(I)); |
| 151 | movementdirectioninfo(I) = (movementdirectioninfo(I)==0) ? StepSign : 0; |
| 152 | // Modified by Sergey KHROMOV - Tue Nov 20 10:41:56 2001 End |
| 153 | // first step of advancement |
| 154 | Standard_Real d2dx = Abs(previousd2d.X()); |
| 155 | Standard_Real d2dy = Abs(previousd2d.Y()); |
| 156 | if (d2dx < tolerance(1)) { |
| 157 | PasC = pas * (VM-Vm)/d2dy; |
| 158 | } |
| 159 | else if (d2dy < tolerance(2)) { |
| 160 | PasC = pas * (UM-Um)/d2dx; |
| 161 | } |
| 162 | else { |
| 163 | PasC = pas * Min((UM-Um)/d2dx,(VM-Vm)/d2dy); |
| 164 | } |
| 165 | |
| 166 | Arrive = Standard_False; |
| 167 | ArretAjout = Standard_False; |
| 168 | NbDivision = 0; |
| 169 | StatusPrecedent = IntWalk_OK; |
| 170 | // modified by NIZHNY-MKK Fri Oct 27 12:39:37 2000 |
| 171 | Standard_Integer IndexOfPathPointDoNotCheck=0; |
| 172 | |
| 173 | while (!Arrive) { // as one of stop tests is not checked |
| 174 | |
| 175 | Cadre = Cadrage(BornInf,BornSup,UVap,PasC,StepSign); |
| 176 | // Border? |
| 177 | |
| 178 | #ifdef CHRONO |
| 179 | Chronrsnld.Start(); |
| 180 | #endif |
| 181 | |
| 182 | Rsnld.Perform(Func,UVap,BornInf,BornSup); |
| 183 | |
| 184 | #ifdef CHRONO |
| 185 | Chronrsnld.Stop(); |
| 186 | #endif |
| 187 | |
| 188 | if (Cadre) { |
| 189 | BornInf(1) = Um; BornSup(1) = UM; BornInf(2) = Vm; BornSup(2) = VM; |
| 190 | } |
| 191 | if (Rsnld.IsDone()) { |
| 192 | if (Abs(Func.Root()) > Func.Tolerance()) { |
| 193 | PasC = PasC / 2.0; |
| 194 | PasCu = Abs(PasC*previousd2d.X()); |
| 195 | PasCv = Abs(PasC*previousd2d.Y()); |
| 196 | if (PasCu <= tolerance(1) && PasCv <= tolerance(2)) { |
| 197 | if (CurrentLine->NbPoints() == 1) break; |
| 198 | Arrive = Standard_True; |
| 199 | CurrentLine->AddStatusLast(Standard_False); |
| 200 | Tgtend = Standard_True; // check |
| 201 | Rajout = Standard_True; |
| 202 | seqAjout.Append(lines.Length() + 1); |
| 203 | } |
| 204 | } |
| 205 | else { // test stop |
| 206 | Rsnld.Root(UVap); |
| 207 | Arrive = TestArretPassage(Umult, Vmult, Func, UVap, N); |
| 208 | if (Arrive) { |
| 209 | Cadre = Standard_False; |
| 210 | //in case if there is a frame and arrive at the same time |
| 211 | } |
| 212 | else { |
| 213 | if (Rajout) { |
| 214 | ArretAjout =TestArretAjout(Func, UVap, N, Psol); |
| 215 | if (ArretAjout) { |
| 216 | // jag 940615 |
| 217 | Tgtend = lines.Value(N)->IsTangentAtEnd(); |
| 218 | N = -N; |
| 219 | } |
| 220 | } |
| 221 | // modified by NIZHNY-MKK Thu Nov 2 15:09:08 2000.BEGIN |
| 222 | if(!(Rajout && ArretAjout)) { |
| 223 | Standard_Real prevUp, prevVp; |
| 224 | if (!reversed) { |
| 225 | previousPoint.ParametersOnS2(prevUp, prevVp); |
| 226 | } |
| 227 | else { |
| 228 | previousPoint.ParametersOnS1(prevUp, prevVp); |
| 229 | } |
| 230 | Arrive = TestPassedSolutionWithNegativeState(etat1, Umult, Vmult, ustart1, vstart1, prevUp, prevVp, |
| 231 | nbMultiplicities, tolerance, Func, UVap, N); |
| 232 | if(Arrive) { |
| 233 | Cadre = Standard_False; |
| 234 | } |
| 235 | } |
| 236 | // modified by NIZHNY-MKK Thu Nov 2 15:09:13 2000.END |
| 237 | if (!ArretAjout && Cadre) { |
| 238 | if (CurrentLine->NbPoints() == 1) break; // cancel the line |
| 239 | TestArretCadre(Umult, Vmult, CurrentLine, Func, UVap, N); |
| 240 | // if (N == 0) { |
| 241 | if (N <= 0) { // jag 941017 |
| 242 | MakeWalkingPoint(2, UVap(1), UVap(2), Func, Psol); |
| 243 | Tgtend = Func.IsTangent(); |
| 244 | N = -N; |
| 245 | } |
| 246 | } |
| 247 | } |
| 248 | Status = TestDeflection(Func, Arrive, UVap, StatusPrecedent, |
| 249 | NbDivision,PasC,StepSign); |
| 250 | StatusPrecedent = Status; |
| 251 | if (Status == IntWalk_PasTropGrand) { |
| 252 | Arrive = Standard_False; |
| 253 | ArretAjout = Standard_False; |
| 254 | Tgtend = Standard_False; // jag 940615 |
| 255 | if (!reversed) { |
| 256 | previousPoint.ParametersOnS2(UVap(1), UVap(2)); |
| 257 | } |
| 258 | else { |
| 259 | previousPoint.ParametersOnS1(UVap(1), UVap(2)); |
| 260 | } |
| 261 | } |
| 262 | else if (ArretAjout || Cadre) { |
| 263 | Arrive = Standard_True; |
| 264 | CurrentLine->AddStatusLast(Standard_False); |
| 265 | if (Status != IntWalk_ArretSurPointPrecedent) { |
| 266 | CurrentLine->AddPoint(Psol); |
| 267 | } |
| 268 | if (Cadre && N==0) { |
| 269 | Rajout = Standard_True; |
| 270 | seqAjout.Append(lines.Length()+1); |
| 271 | } |
| 272 | } |
| 273 | else if (Status == IntWalk_ArretSurPointPrecedent) { |
| 274 | if (CurrentLine->NbPoints() == 1) { //cancel the line |
| 275 | Arrive = Standard_False; |
| 276 | break; |
| 277 | } |
| 278 | Arrive = Standard_True; |
| 279 | Rajout = Standard_True; |
| 280 | seqAjout.Append(lines.Length() + 1); |
| 281 | CurrentLine->AddStatusLast(Standard_False); |
| 282 | Tgtend = Standard_True; // check |
| 283 | } |
| 284 | else if (Arrive) { |
| 285 | if (CurrentLine->NbPoints() == 1 && // cancel the line |
| 286 | (N == I || Status == IntWalk_PointConfondu) ) { |
| 287 | // if N == I the main uv is probably lost |
| 288 | // or the point is a point of accumulation |
| 289 | // if point is confused the start data is bad |
| 290 | Arrive = Standard_False; |
| 291 | break; |
| 292 | } |
| 293 | // necessairily N > 0 jag 940617 |
| 294 | // point of stop given at input |
| 295 | PathPnt = Pnts1.Value(N); |
| 296 | |
| 297 | Standard_Integer etat1N=etat1(N); |
| 298 | // modified by NIZHNY-MKK Thu Nov 2 15:09:51 2000.BEGIN |
| 299 | // if (etat1N < 11) { // passing point that is a stop |
| 300 | if (Abs(etat1N) < 11) { // passing point that is a stop |
| 301 | // modified by NIZHNY-MKK Thu Nov 2 15:12:11 2000.END |
| 302 | if (Status == IntWalk_ArretSurPoint) { |
| 303 | CurrentLine->AddStatusLast(Standard_False); |
| 304 | Tgtend = Standard_True; // need check |
| 305 | } |
| 306 | else { |
| 307 | Arrive = Standard_False; |
| 308 | } |
| 309 | CurrentLine->AddIndexPassing(N); |
| 310 | } |
| 311 | else { // point of stop given at input |
| 312 | if (etat1N == 11) { |
| 313 | Tgtend = Standard_True; |
| 314 | } |
| 315 | CurrentLine->AddStatusLast(Standard_True, N, PathPnt); |
| 316 | } |
| 317 | AddPointInCurrentLine(N,PathPnt,CurrentLine); |
| 318 | if ((etat1N != 1 && etat1N != 11)) { |
| 319 | // modified by NIZHNY-MKK Fri Oct 27 12:43:05 2000.BEGIN |
| 320 | // etat1(N)= - etat1N; |
| 321 | etat1(N)= - Abs(etat1N); |
| 322 | movementdirectioninfo(N) = (movementdirectioninfo(N)==0) ? StepSign : 0; |
| 323 | if(Arrive && movementdirectioninfo(N)!=0) { |
| 324 | IndexOfPathPointDoNotCheck = N; |
| 325 | } |
| 326 | |
| 327 | if(Arrive) { |
| 328 | Rajout = Standard_True; |
| 329 | seqAjout.Append(lines.Length() + 1); |
| 330 | } |
| 331 | // modified by NIZHNY-MKK Fri Oct 27 12:45:33 2000.END |
| 332 | } |
| 333 | } |
| 334 | else if (Status == IntWalk_ArretSurPoint) { |
| 335 | Arrive = Standard_True; |
| 336 | CurrentLine->AddStatusLast(Standard_False); |
| 337 | Tgtend = Standard_True; |
| 338 | MakeWalkingPoint(1, UVap(1), UVap(2), Func, Psol); |
| 339 | CurrentLine->AddPoint(Psol); |
| 340 | Rajout = Standard_True; |
| 341 | seqAjout.Append(lines.Length() + 1); |
| 342 | } |
| 343 | else if (Status == IntWalk_OK) { |
| 344 | MakeWalkingPoint(2, UVap(1), UVap(2), Func, previousPoint); |
| 345 | previousd3d = Func.Direction3d(); |
| 346 | previousd2d = Func.Direction2d(); |
| 347 | CurrentLine->AddPoint(previousPoint); |
| 348 | } |
| 349 | } |
| 350 | } |
| 351 | else { // no numerical solution |
| 352 | PasC = PasC / 2.; |
| 353 | PasCu = Abs(PasC*previousd2d.X()); |
| 354 | PasCv = Abs(PasC*previousd2d.Y()); |
| 355 | if (PasCu <= tolerance(1) && PasCv <= tolerance(2)) { |
| 356 | if (CurrentLine->NbPoints()==1) break; |
| 357 | Arrive = Standard_True; |
| 358 | CurrentLine->AddStatusLast(Standard_False); |
| 359 | Tgtend = Standard_True; // need check |
| 360 | Rajout = Standard_True; |
| 361 | seqAjout.Append(lines.Length() + 1); |
| 362 | } |
| 363 | } |
| 364 | } // end of started line |
| 365 | |
| 366 | if (Arrive) { |
| 367 | CurrentLine->SetTangencyAtEnd(Tgtend); |
| 368 | lines.Append(CurrentLine); |
| 369 | // modified by NIZHNY-MKK Fri Oct 27 12:59:29 2000.BEGIN |
| 370 | movementdirectioninfo(I)=0; |
| 371 | if(etat1(I) > 0) |
| 372 | // modified by NIZHNY-MKK Fri Oct 27 12:59:42 2000.END |
| 373 | etat1(I)=-etat1(I); |
| 374 | |
| 375 | //-- lbr le 5 juin 97 (Pb ds Contap) |
| 376 | for(Standard_Integer av=1; av<=nbPath; av++) { |
| 377 | // modified by NIZHNY-MKK Fri Oct 27 13:00:22 2000.BEGIN |
| 378 | // if (etat1(av) > 11) { |
| 379 | if ((etat1(av) > 11) || |
| 380 | ((av!=I) && |
| 381 | (av!=IndexOfPathPointDoNotCheck) && |
| 382 | (etat1(av) < -11) && |
| 383 | (movementdirectioninfo(av)!=0))) { |
| 384 | // modified by NIZHNY-MKK Fri Oct 27 13:00:26 2000.END |
| 385 | Standard_Real Uav=ustart1(av); |
| 386 | Standard_Real Vav=vstart1(av); |
| 387 | Standard_Real Uavp,Vavp; |
| 388 | const IntSurf_PntOn2S &avP=CurrentLine->Value(CurrentLine->NbPoints()); |
| 389 | if (!reversed) { |
| 390 | avP.ParametersOnS2(Uavp,Vavp); |
| 391 | } |
| 392 | else { |
| 393 | avP.ParametersOnS1(Uavp,Vavp); |
| 394 | } |
| 395 | Uav-=Uavp; |
| 396 | Vav-=Vavp; |
| 397 | Uav*=0.001; Vav*=0.001; |
| 398 | if(Abs(Uav)<tolerance(1) && Abs(Vav)<tolerance(2)) { |
| 399 | // modified by NIZHNY-MKK Fri Oct 27 13:01:38 2000.BEGIN |
| 400 | // etat1(av)=-etat1(av); |
| 401 | if(etat1(av) < 0) { |
| 402 | movementdirectioninfo(av) = 0; |
| 403 | } else { |
| 404 | etat1(av)=-etat1(av); |
| 405 | movementdirectioninfo(av) = StepSign; |
| 406 | } |
| 407 | // modified by NIZHNY-MKK Fri Oct 27 13:01:42 2000.END |
| 408 | CurrentLine->AddStatusLast(Standard_True, av, Pnts1.Value(av)); |
| 409 | //-- cout<<"\n Debug ? lbr ds IntWalk_IWalking_3.gxx"<<endl; |
| 410 | } |
| 411 | |
| 412 | const IntSurf_PntOn2S &avPP=CurrentLine->Value(1); |
| 413 | if (!reversed) { |
| 414 | avPP.ParametersOnS2(Uavp,Vavp); |
| 415 | } |
| 416 | else { |
| 417 | avPP.ParametersOnS1(Uavp,Vavp); |
| 418 | } |
| 419 | Uav=ustart1(av); |
| 420 | Vav=vstart1(av); |
| 421 | Uav-=Uavp; |
| 422 | Vav-=Vavp; |
| 423 | Uav*=0.001; Vav*=0.001; |
| 424 | if(Abs(Uav)<tolerance(1) && Abs(Vav)<tolerance(2)) { |
| 425 | // modified by NIZHNY-MKK Fri Oct 27 13:02:49 2000.BEGIN |
| 426 | // etat1(av)=-etat1(av); |
| 427 | if(etat1(av) < 0) { |
| 428 | movementdirectioninfo(av) = 0; |
| 429 | } else { |
| 430 | etat1(av)=-etat1(av); |
| 431 | movementdirectioninfo(av) = -StepSign; |
| 432 | } |
| 433 | // modified by NIZHNY-MKK Fri Oct 27 13:02:52 2000.END |
| 434 | //-- cout<<"\n Debug ? lbr ds IntWalk_IWalking_3.gxx"<<endl; |
| 435 | CurrentLine->AddStatusFirst(Standard_False, Standard_True, av, Pnts1.Value(av)); |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | } |
| 441 | } //end of point processing |
| 442 | } //end of all points |
| 443 | } |
| 444 | |
| 445 | // modified by NIZHNY-MKK Thu Nov 2 15:07:53 2000.BEGIN |
| 446 | static Standard_Boolean TestPassedSolutionWithNegativeState(const TColStd_SequenceOfInteger& etat, |
| 447 | const TColStd_SequenceOfReal& Umult, |
| 448 | const TColStd_SequenceOfReal& Vmult, |
| 449 | const TColStd_SequenceOfReal& ustart, |
| 450 | const TColStd_SequenceOfReal& vstart, |
| 451 | const Standard_Real& prevUp, |
| 452 | const Standard_Real& prevVp, |
| 453 | const TColStd_SequenceOfInteger& nbMultiplicities, |
| 454 | const math_Vector& tolerance, |
| 455 | TheIWFunction& sp, |
| 456 | math_Vector& UV, |
| 457 | Standard_Integer& Irang) { |
| 458 | Standard_Boolean Arrive = Standard_False; |
| 459 | Standard_Real Dup, Dvp, Utest,Vtest; |
| 460 | Standard_Real tolu = tolerance(1); |
| 461 | Standard_Real tolv = tolerance(2); |
| 462 | Standard_Integer i, j, k, N; |
| 463 | for (i = 1; i <= etat.Length(); i++) { |
| 464 | if (etat(i) < -11) { |
| 465 | |
| 466 | // debug jag see with isg |
| 467 | |
| 468 | Utest = ustart(i); |
| 469 | Vtest = vstart(i); |
| 470 | Dup = prevUp - Utest; |
| 471 | Dvp = prevVp - Vtest; |
| 472 | if (Abs(Dup) >= tolu || Abs(Dvp) >= tolv) { |
| 473 | Standard_Real UV1mUtest = UV(1)-Utest; |
| 474 | Standard_Real UV2mVtest = UV(2)-Vtest; |
| 475 | if(( (Dup*UV1mUtest + Dvp*UV2mVtest) < 0) || |
| 476 | ( Abs(UV1mUtest) < tolu |
| 477 | && Abs(UV2mVtest) < tolv)) { |
| 478 | Irang=i; |
| 479 | Arrive = Standard_True; |
| 480 | UV(1) = Utest; |
| 481 | UV(2) = Vtest; |
| 482 | } |
| 483 | else if (nbMultiplicities(i) > 0) { |
| 484 | N=0; |
| 485 | for (k = 1; k < i; k++) { |
| 486 | N+=nbMultiplicities(k); |
| 487 | } |
| 488 | for (j = N + 1; j <= N + nbMultiplicities(i); j++) { |
| 489 | if (((prevUp-Umult(j))*(UV(1)-Umult(j)) + |
| 490 | (prevVp-Vmult(j))*(UV(2)-Vmult(j)) < 0) || |
| 491 | (Abs(UV(1)-Umult(j)) < tolu && |
| 492 | Abs(UV(2)-Vmult(j)) < tolv)) { |
| 493 | Irang=i; |
| 494 | Arrive = Standard_True; |
| 495 | UV(1) = Utest; |
| 496 | UV(2) = Vtest; |
| 497 | break; |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | if (Arrive) { |
| 502 | Standard_Real abidF[1], abidD[1][2]; |
| 503 | math_Vector bidF(abidF,1,1); |
| 504 | math_Matrix bidD(abidD,1,1,1,2); |
| 505 | sp.Values(UV,bidF,bidD); |
| 506 | break; |
| 507 | } |
| 508 | } |
| 509 | } |
| 510 | } |
| 511 | return Arrive; |
| 512 | } |
| 513 | // modified by NIZHNY-MKK Thu Nov 2 15:07:58 2000.END |