src/IntPatch/IntPatch_PrmPrmIntersection.cxx

   1 // Created on: 1993-02-02
   2 // Created by: Laurent BUCHARD
   3 // Copyright (c) 1993-1999 Matra Datavision
   4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
   5 //
   6 // This file is part of Open CASCADE Technology software library.
   7 //
   8 // This library is free software; you can redistribute it and/or modify it under
   9 // the terms of the GNU Lesser General Public License version 2.1 as published
  10 // by the Free Software Foundation, with special exception defined in the file
  11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
  12 // distribution for complete text of the license and disclaimer of any warranty.
  13 //
  14 // Alternatively, this file may be used under the terms of Open CASCADE
  15 // commercial license or contractual agreement.
  16
  17 // modified by Edward AGAPOV (eap) Tue Jan 22 12:29:55 2002
  18 // modified by Oleg FEDYAED  (ofv) Fri Nov 29 16:08:02 2002
  19
  20 #include <Adaptor3d_HSurface.hxx>
  21 #include <Adaptor3d_TopolTool.hxx>
  22 #include <gp_Dir.hxx>
  23 #include <gp_Pnt.hxx>
  24 #include <Intf_PIType.hxx>
  25 #include <Intf_SectionLine.hxx>
  26 #include <Intf_SectionPoint.hxx>
  27 #include <Intf_TangentZone.hxx>
  28 #include <IntPatch_InterferencePolyhedron.hxx>
  29 #include <IntPatch_Line.hxx>
  30 #include <IntPatch_Polyhedron.hxx>
  31 #include <IntPatch_PrmPrmIntersection.hxx>
  32 #include <IntPatch_PrmPrmIntersection_T3Bits.hxx>
  33 #include <IntPatch_RstInt.hxx>
  34 #include <IntPatch_WLine.hxx>
  35 #include <IntPolyh_Intersection.hxx>
  36 #include <IntSurf_LineOn2S.hxx>
  37 #include <IntSurf_ListIteratorOfListOfPntOn2S.hxx>
  38 #include <IntSurf_PntOn2S.hxx>
  39 #include <IntWalk_PWalking.hxx>
  40 #include <Standard_OutOfRange.hxx>
  41 #include <StdFail_NotDone.hxx>
  42 #include <TColStd_Array1OfReal.hxx>
  43 #include <TColStd_HArray1OfReal.hxx>
  44 #include <TColStd_SequenceOfInteger.hxx>
  45
  46 static void SectionPointToParameters(const Intf_SectionPoint& Sp,
  47                                      const IntPatch_Polyhedron& Surf1,
  48                                      const IntPatch_Polyhedron& Surf2,
  49                                      Standard_Real& u1,
  50                                      Standard_Real& v1,
  51                                      Standard_Real& u2,
  52                                      Standard_Real& v2);
  53
  54
  55 static
  56 void AdjustOnPeriodic(const Handle(Adaptor3d_HSurface)& Surf1,
  57                       const Handle(Adaptor3d_HSurface)& Surf2,
  58                       IntPatch_SequenceOfLine& aSLin);
  59
  60 static
  61 IntSurf_PntOn2S MakeNewPoint(const IntSurf_PntOn2S& replacePnt,
  62                              const IntSurf_PntOn2S& oldPnt,
  63                              const Standard_Real* Periods);
  64
  65 static Standard_Boolean IsPointOnLine(const IntSurf_PntOn2S        &thePOn2S,
  66                                       const Handle(IntPatch_WLine) &theWLine,
  67                                       const Standard_Real           Deflection);
  68
  69 static void AddWLine(IntPatch_SequenceOfLine      &theLines,
  70                      const Handle(IntPatch_WLine) &theWLine,
  71                      const Standard_Real           Deflection);
  72
  73 static void SeveralWlinesProcessing(const Handle(Adaptor3d_HSurface)& theSurf1,
  74                                     const Handle(Adaptor3d_HSurface)& theSurf2,
  75                                     const IntPatch_SequenceOfLine& theSLin,
  76                                     const Standard_Real* const thePeriodsArr,
  77                                     const IntSurf_TypeTrans theTrans1,
  78                                     const IntSurf_TypeTrans theTrans2,
  79                                     const Standard_Real theTol,
  80                                     const Standard_Real theMaxStepS1,
  81                                     const Standard_Real theMaxStepS2,
  82                                     Handle(IntPatch_WLine)& theWLline)
  83 {
  84   if(theSLin.Length() == 0)
  85     return;
  86
  87   Standard_Real aU1 = 0.0, aV1 = 0.0, aU2 = 0.0, aV2 = 0.0;
  88
  89   Standard_Integer cnbV = theWLline->NbVertex();
  90   Standard_Integer ciV;
  91   for( ciV = 1; ciV <= cnbV; ciV++ )
  92   {
  93     Standard_Real pntDMin = 1.e+100;
  94     Standard_Integer VDMin = 0;
  95     Standard_Integer WLDMin = 0;
  96     gp_Pnt cPV = theWLline->Vertex(ciV).Value();
  97     theWLline->Vertex(ciV).Parameters(aU1, aV1, aU2, aV2);
  98     const gp_Pnt2d aPCS1(aU1, aV1), aPCS2(aU2, aV2);
  99     Standard_Integer iL;
 100     for( iL = 1; iL <= theSLin.Length(); iL++)
 101     {
 102       const Handle(IntPatch_Line)& aSLine = theSLin.Value(iL);
 103       IntPatch_IType aType = aSLine->ArcType();
 104       if( aType != IntPatch_Walking)
 105         continue;
 106       const Handle(IntPatch_WLine) aWLine = Handle(IntPatch_WLine)::DownCast(aSLine);
 107       Standard_Integer tnbV = aWLine->NbVertex();
 108       Standard_Integer tiV;
 109       for( tiV = 1; tiV <= tnbV; tiV++ )
 110       {
 111         gp_Pnt tPV = aWLine->Vertex(tiV).Value();
 112
 113         aWLine->Vertex(tiV).Parameters(aU1, aV1, aU2, aV2);
 114         const gp_Pnt2d aPTS1(aU1, aV1), aPTS2(aU2, aV2);
 115
 116         Standard_Real tDistance = cPV.Distance(tPV);
 117         Standard_Real uRs1 = theSurf1->Surface().UResolution(tDistance);
 118         Standard_Real vRs1 = theSurf1->Surface().VResolution(tDistance);
 119         Standard_Real uRs2 = theSurf2->Surface().UResolution(tDistance);
 120         Standard_Real vRs2 = theSurf2->Surface().VResolution(tDistance);
 121         Standard_Real RmaxS1 = Max(uRs1,vRs1);
 122         Standard_Real RmaxS2 = Max(uRs2,vRs2);
 123
 124         if(RmaxS1 < theMaxStepS1 && RmaxS2 < theMaxStepS2)
 125         {
 126           if( pntDMin > tDistance && tDistance > Precision::PConfusion())
 127           {
 128             const Standard_Real aSqDist1 = aPCS1.SquareDistance(aPTS1),
 129                                 aSqDist2 = aPCS2.SquareDistance(aPTS2);
 130             if((aSqDist1 < RmaxS1*RmaxS1) && (aSqDist2 < RmaxS2*RmaxS2))
 131             {
 132               pntDMin = tDistance;
 133               VDMin = tiV;
 134               WLDMin = iL;
 135             }
 136           }
 137         }
 138       }
 139     }
 140
 141     if( VDMin != 0 )
 142     {
 143       const Handle(IntPatch_Line)& aSLine = theSLin.Value(WLDMin);
 144       const Handle(IntPatch_WLine) aWLine = Handle(IntPatch_WLine)::DownCast(aSLine);
 145       Standard_Integer tiVpar = (Standard_Integer)aWLine->Vertex(VDMin).ParameterOnLine();
 146       Standard_Integer ciVpar = (Standard_Integer)theWLline->Vertex(ciV).ParameterOnLine();
 147       Standard_Real u11 = 0., u12 = 0., v11 = 0., v12 = 0.;
 148       Standard_Real u21 = 0., u22 = 0., v21 = 0., v22 = 0.;
 149       theWLline->Point(ciVpar).Parameters(u11,v11,u12,v12);
 150       aWLine->Point(tiVpar).Parameters(u21,v21,u22,v22);
 151
 152       Handle(IntSurf_LineOn2S) newL2s = new IntSurf_LineOn2S();
 153       IntSurf_PntOn2S replacePnt = aWLine->Point(tiVpar);
 154       Standard_Integer cNbP = theWLline->NbPnts();
 155
 156       TColStd_SequenceOfInteger VPold;
 157       Standard_Integer iPo;
 158       for( iPo = 1; iPo <= cnbV; iPo++ )
 159       {
 160         Standard_Real Po = theWLline->Vertex(iPo).ParameterOnLine();
 161         Standard_Integer IPo = (Standard_Integer) Po;
 162         VPold.Append(IPo);
 163       }
 164
 165       Standard_Boolean removeNext = Standard_False;
 166       Standard_Boolean removePrev = Standard_False;
 167       if( ciV == 1)
 168       {
 169         Standard_Integer dPar = Abs( VPold.Value(ciV) - VPold.Value(ciV+1));
 170         if(dPar > 10)
 171         {
 172           removeNext = Standard_True;
 173           for( iPo = (ciV+1); iPo <= cnbV; iPo++ )
 174             VPold.SetValue(iPo, VPold.Value(iPo) - 1 );
 175         }
 176       }
 177       else if( ciV == cnbV)
 178       {
 179         Standard_Integer dPar = Abs( VPold.Value(ciV) - VPold.Value(ciV-1));
 180         if(dPar > 10)
 181         {
 182           removePrev = Standard_True;
 183           VPold.SetValue(ciV, VPold.Value(ciV) - 1 );
 184         }
 185       }
 186       else
 187       {
 188         Standard_Integer dParMi = Abs( VPold.Value(ciV) - VPold.Value(ciV-1));
 189         Standard_Integer dParMa = Abs( VPold.Value(ciV) - VPold.Value(ciV+1));
 190         if(dParMi > 10)
 191         {
 192           removePrev = Standard_True;
 193           VPold.SetValue(ciV, VPold.Value(ciV) - 1 );
 194         }
 195
 196         if(dParMa > 10)
 197         {
 198           removeNext = Standard_True;
 199           for( iPo = (ciV+1); iPo <= cnbV; iPo++ )
 200           {
 201             if(dParMi > 10)
 202               VPold.SetValue(iPo, VPold.Value(iPo) - 2 );
 203             else
 204               VPold.SetValue(iPo, VPold.Value(iPo) - 1 );
 205           }
 206         }
 207         else
 208         {
 209           if(dParMi > 10)
 210             for( iPo = (ciV+1); iPo <= cnbV; iPo++ )
 211               VPold.SetValue(iPo, VPold.Value(iPo) - 1 );
 212         }
 213       }
 214
 215       Standard_Integer pI = ciVpar;
 216
 217       Standard_Integer iP;
 218       for( iP = 1; iP <= cNbP; iP++)
 219       {
 220         if( pI == iP )
 221         {
 222           IntSurf_PntOn2S newPnt = MakeNewPoint(replacePnt, theWLline->Point(iP), thePeriodsArr);
 223           newL2s->Add(newPnt);
 224         }
 225         else if(removeNext && iP == (pI + 1))
 226           continue;
 227         else if(removePrev && iP == (pI - 1))
 228           continue;
 229         else
 230           newL2s->Add(theWLline->Point(iP));
 231       }
 232
 233       IntPatch_Point newVtx;
 234       gp_Pnt Pnt3dV = aWLine->Vertex(VDMin).Value();
 235       newVtx.SetValue(Pnt3dV,theTol,Standard_False);
 236       newVtx.SetParameters(u21,v21,u22,v22);
 237       newVtx.SetParameter(VPold.Value(ciV));
 238
 239       Handle(IntPatch_WLine) NWLine = new IntPatch_WLine(newL2s,Standard_False,theTrans1,theTrans2);
 240
 241       Standard_Integer iV;
 242       for( iV = 1; iV <= cnbV; iV++ )
 243       {
 244         if( iV == ciV )
 245           NWLine->AddVertex(newVtx);
 246         else
 247         {
 248           IntPatch_Point theVtx = theWLline->Vertex(iV);
 249           theVtx.SetParameter(VPold.Value(iV));
 250           NWLine->AddVertex(theVtx);
 251         }
 252       }
 253
 254       theWLline = NWLine;
 255     }//if( VDMin != 0 )
 256   }//for( ciV = 1; ciV <= cnbV; ciV++ )
 257 }
 258
 259 //=======================================================================
 260 //function : DublicateOfLinesProcessing
 261 //purpose  : Decides, if rejecting current line is necessary
 262 //=======================================================================
 263 static void DublicateOfLinesProcessing( const IntWalk_PWalking& thePW,
 264                                         const Standard_Integer theWLID,
 265                                         IntPatch_SequenceOfLine& theLines,
 266                                         Standard_Boolean& theIsRejectReq)
 267 {
 268   const Handle(IntPatch_WLine)& anExistWL =
 269                       *((Handle(IntPatch_WLine)*)&theLines.Value(theWLID));
 270   const Standard_Integer aNbPrevPoints = anExistWL->NbPnts();
 271   const Standard_Integer aNbCurrPoints = thePW.NbPoints();
 272
 273   if(aNbPrevPoints < aNbCurrPoints)
 274   {//Remove preview line
 275     theLines.Remove(theWLID);
 276     theIsRejectReq = Standard_False;
 277   }
 278   else if(aNbPrevPoints == aNbCurrPoints)
 279   {
 280     Standard_Real aLPrev = 0.0, aLCurr = 0.0;
 281     for(Standard_Integer aNbPP = 1; aNbPP < aNbPrevPoints; aNbPP++)
 282     {
 283       const gp_Pnt  aP1prev(anExistWL->Point(aNbPP).Value()),
 284         aP2prev(anExistWL->Point(aNbPP+1).Value());
 285       const gp_Pnt  aP1curr(thePW.Value(aNbPP).Value()),
 286         aP2curr(thePW.Value(aNbPP+1).Value());
 287
 288       aLPrev += aP1prev.Distance(aP2prev);
 289       aLCurr += aP1curr.Distance(aP2curr);
 290     }
 291
 292     if(aLPrev < aLCurr)
 293     {//Remove preview line
 294       theLines.Remove(theWLID);
 295       theIsRejectReq = Standard_False;
 296     }
 297   }
 298 }
 299
 300 //==================================================================================
 301 // function :
 302 // purpose  :
 303 //==================================================================================
 304 IntPatch_PrmPrmIntersection::IntPatch_PrmPrmIntersection(): done(Standard_False)
 305 {
 306 }
 307
 308 //==================================================================================
 309 // function : Perform
 310 // purpose  :
 311 //==================================================================================
 312 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)&   Surf1,
 313                                            const Handle(Adaptor3d_TopolTool)& D1,
 314                                            const Standard_Real  TolTangency,
 315                                            const Standard_Real  Epsilon,
 316                                            const Standard_Real  Deflection,
 317                                            const Standard_Real  Increment)
 318 {
 319   IntPatch_Polyhedron Poly1( Surf1, D1->NbSamplesU(), D1->NbSamplesV() );
 320   Perform( Surf1, Poly1, D1, TolTangency, Epsilon, Deflection, Increment );
 321 }
 322
 323 //==================================================================================
 324 // function : Perform
 325 // purpose  :
 326 //==================================================================================
 327 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)&   Surf1,
 328                                            const IntPatch_Polyhedron& Poly1,
 329                                            const Handle(Adaptor3d_TopolTool)& D1,
 330                                            const Handle(Adaptor3d_HSurface)&   Surf2,
 331                                            const Handle(Adaptor3d_TopolTool)& D2,
 332                                            const Standard_Real  TolTangency,
 333                                            const Standard_Real  Epsilon,
 334                                            const Standard_Real  Deflection,
 335                                            const Standard_Real  Increment)
 336 {
 337   IntPatch_Polyhedron Poly2( Surf2 );
 338   Perform( Surf1, Poly1, D1, Surf2, Poly2, D2, TolTangency, Epsilon, Deflection, Increment);
 339 }
 340
 341 //==================================================================================
 342 // function : Perform
 343 // purpose  :
 344 //==================================================================================
 345 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)&   Surf1,
 346                                            const Handle(Adaptor3d_TopolTool)& D1,
 347                                            const Handle(Adaptor3d_HSurface)&   Surf2,
 348                                            const IntPatch_Polyhedron& Poly2,
 349                                            const Handle(Adaptor3d_TopolTool)& D2,
 350                                            const Standard_Real  TolTangency,
 351                                            const Standard_Real  Epsilon,
 352                                            const Standard_Real  Deflection,
 353                                            const Standard_Real  Increment)
 354 {
 355   IntPatch_Polyhedron Poly1( Surf1 );
 356   Perform( Surf1, Poly1, D1, Surf2, Poly2, D2, TolTangency, Epsilon, Deflection, Increment );
 357 }
 358
 359 //==================================================================================
 360 // function : Perform
 361 // purpose  :
 362 //==================================================================================
 363 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)&    Surf1,
 364                                            const IntPatch_Polyhedron&  Poly1,
 365                                            const Handle(Adaptor3d_TopolTool)& D1,
 366                                            const Handle(Adaptor3d_HSurface)&    Surf2,
 367                                            const IntPatch_Polyhedron&  Poly2,
 368                                            const Handle(Adaptor3d_TopolTool)& D2,
 369                                            const Standard_Real   TolTangency,
 370                                            const Standard_Real   Epsilon,
 371                                            const Standard_Real   Deflection,
 372                                            const Standard_Real   Increment)
 373 {
 374   IntPatch_InterferencePolyhedron Interference(Poly1,Poly2);
 375   empt = Standard_True;
 376   done = Standard_True;
 377   SLin.Clear();
 378
 379   Standard_Integer nbLigSec = Interference.NbSectionLines();
 380   Standard_Integer nbTanZon = Interference.NbTangentZones();
 381
 382   Standard_Integer NbLigCalculee = 0;
 383
 384   Standard_Real U1,U2,V1,V2;
 385   Standard_Real pu1,pu2,pv1,pv2;
 386
 387   TColStd_Array1OfReal StartParams(1,4);
 388
 389   IntWalk_PWalking PW( Surf1, Surf2, TolTangency, Epsilon, Deflection, Increment );
 390
 391   Standard_Real    SeuildPointLigne = 15.0 * Increment * Increment; //-- 10 est insuffisant
 392   Standard_Real    incidence;
 393   Standard_Real    dminiPointLigne;
 394
 395   Standard_Boolean HasStartPoint,RejetLigne;
 396
 397   IntSurf_PntOn2S StartPOn2S;
 398
 399   Standard_Integer ver;
 400
 401   gp_Pnt Point3dDebut,Point3dFin;
 402
 403   if( nbLigSec >= 1 ) {
 404     Standard_Integer *TabL = new Standard_Integer [nbLigSec+1];
 405     Standard_Integer ls;
 406     for( ls = 1; ls <= nbLigSec; ls++ )
 407       TabL[ls]=ls;
 408
 409     Standard_Boolean triok;
 410     do {
 411       triok=Standard_True;
 412       for(Standard_Integer b=2; b<=nbLigSec; b++) {
 413         Standard_Integer nb_B = Interference.LineValue(TabL[b]).NumberOfPoints();
 414         Standard_Integer nb_A = Interference.LineValue(TabL[b-1]).NumberOfPoints();
 415         if( nb_B > nb_A ) {
 416           Standard_Integer tyu=TabL[b];
 417           TabL[b]=TabL[b-1];
 418           TabL[b-1]=tyu;
 419           triok=Standard_False;
 420         }
 421       }
 422     } while( triok==Standard_False );
 423
 424     for( ls = 1; ls <= nbLigSec; ls++) {
 425       const Intf_SectionLine& LineSec=Interference.LineValue(TabL[ls]);
 426       Standard_Integer nbp = LineSec.NumberOfPoints();
 427
 428       Standard_Integer *TabPtDep = new Standard_Integer [nbp+1];
 429       Standard_Integer ilig;
 430       for( ilig = 1; ilig <= nbp; ilig++)
 431         TabPtDep[ilig]=0;
 432
 433       Standard_Real UminLig1,VminLig1,UmaxLig1,VmaxLig1;
 434       Standard_Real UminLig2,VminLig2,UmaxLig2,VmaxLig2;
 435
 436       SectionPointToParameters(LineSec.GetPoint(1),Poly1,Poly2,UminLig1,VminLig1,UminLig2,VminLig2);
 437
 438       UmaxLig1=UminLig1;
 439       VmaxLig1=VminLig1;
 440       UmaxLig2=UminLig2;
 441       VmaxLig2=VminLig2;
 442
 443       for( ilig = 2; ilig <= nbp; ilig++ ) {
 444         SectionPointToParameters(LineSec.GetPoint(ilig),Poly1,Poly2,U1,V1,U2,V2);
 445
 446         if(U1>UmaxLig1) UmaxLig1=U1;
 447         if(V1>VmaxLig1) VmaxLig1=V1;
 448         if(U2>UmaxLig2) UmaxLig2=U2;
 449         if(V2>VmaxLig2) VmaxLig2=V2;
 450
 451         if(U1<UminLig1) UminLig1=U1;
 452         if(V1<VminLig1) VminLig1=V1;
 453         if(U2<UminLig2) UminLig2=U2;
 454         if(V2<VminLig2) VminLig2=V2;
 455       }
 456
 457       Standard_Integer nbps2 = (nbp>3)? (nbp/2) :  1;
 458       Standard_Integer NombreDePointsDeDepartDuCheminement = 0;
 459       Standard_Integer IndicePointdeDepart1 = 0,IndicePointdeDepart2 = 0;
 460       Standard_Boolean lignetrouvee=Standard_False;
 461
 462       do {
 463         NombreDePointsDeDepartDuCheminement++;
 464         if(NombreDePointsDeDepartDuCheminement == 1) {
 465           incidence=3.0;
 466           Standard_Integer nbp1_4=nbp/4;
 467           Standard_Integer nbp3_4=nbp-nbp1_4;
 468
 469           Standard_Integer nsp;
 470           for(nsp=nbp/2; nsp<nbp3_4; nsp++) {
 471             Standard_Real CurrentIncidence =  LineSec.GetPoint(nsp).Incidence();
 472             if(CurrentIncidence < incidence) {
 473               nbps2 = nsp;
 474               incidence = 0.9*CurrentIncidence;
 475             }
 476           }
 477
 478           for(nsp=nbp/2; nsp>nbp1_4; nsp--) {
 479             Standard_Real CurrentIncidence =  LineSec.GetPoint(nsp).Incidence();
 480             if(CurrentIncidence < incidence) {
 481               nbps2 = nsp;
 482               incidence = 0.9*CurrentIncidence;
 483             }
 484           }
 485
 486           if(nbp<3)
 487             NombreDePointsDeDepartDuCheminement=3;
 488
 489           IndicePointdeDepart1 = nbps2;
 490         }
 491         else if(NombreDePointsDeDepartDuCheminement == 2) {
 492           if(IndicePointdeDepart1 == 1) {
 493             nbps2 = nbp/2;
 494             IndicePointdeDepart2 = nbps2;
 495           }
 496           else {
 497             nbps2 = 1;
 498             IndicePointdeDepart2 = 1;
 499           }
 500         }
 501         else if(NombreDePointsDeDepartDuCheminement == 3) {
 502           if(IndicePointdeDepart1 == nbp)
 503             nbps2 = (IndicePointdeDepart1+IndicePointdeDepart2)/2;
 504           else
 505             nbps2 = nbp;
 506         }
 507         else {
 508           nbps2 = NombreDePointsDeDepartDuCheminement-3;
 509           NombreDePointsDeDepartDuCheminement++;
 510         }
 511
 512         if(TabPtDep[nbps2]==0) {
 513           TabPtDep[nbps2]=1;
 514           SectionPointToParameters(LineSec.GetPoint(nbps2),Poly1,Poly2,U1,V1,U2,V2);
 515
 516           StartParams(1) = U1;
 517           StartParams(2) = V1;
 518           StartParams(3) = U2;
 519           StartParams(4) = V2;
 520
 521           HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
 522           dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
 523
 524           if(HasStartPoint) {
 525             StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
 526             NbLigCalculee = SLin.Length();
 527             Standard_Integer l;
 528             for( l=1; (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne); l++) {
 529               const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
 530
 531               if (IsPointOnLine(StartPOn2S, testwline, Deflection)) {
 532                 dminiPointLigne = 0.0;
 533               }
 534             } // for ( l ...
 535
 536             if(dminiPointLigne > SeuildPointLigne) {
 537               PW.Perform(StartParams,UminLig1,VminLig1,UminLig2,VminLig2,UmaxLig1,VmaxLig1,UmaxLig2,VmaxLig2);
 538               if(PW.IsDone()) {
 539                 if(PW.NbPoints()>2) {
 540                   RejetLigne = Standard_False;
 541                   Point3dDebut = PW.Value(1).Value();
 542                   const IntSurf_PntOn2S& PointFin = PW.Value(PW.NbPoints());
 543                   Point3dFin   = PointFin.Value();
 544                   for( ver = 1 ; ver<= NbLigCalculee ; ver++) {
 545                     const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
 546
 547                     // Check end point if it is on existing line.
 548                     // Start point is checked before.
 549                     if (IsPointOnLine(PointFin, verwline, Deflection)) {
 550                       RejetLigne = Standard_True;
 551                       break;
 552                     }
 553
 554                     const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
 555                     const IntSurf_PntOn2S& verPointFin = verwline->Point(verwline->NbPnts());
 556                     if( (Point3dDebut.Distance(verPointDebut.Value()) <= TolTangency) &&
 557                         (Point3dFin.Distance(verPointFin.Value()) <= TolTangency))
 558                     {
 559                       RejetLigne = Standard_True;
 560                       break;
 561                     }
 562                   }
 563
 564                   if(RejetLigne)
 565                   {
 566                     DublicateOfLinesProcessing(PW, ver, SLin, RejetLigne);
 567                   }
 568
 569                   if(!RejetLigne) {
 570                     // Calculation transition
 571                     IntSurf_TypeTrans trans1,trans2;
 572                     Standard_Real locu,locv;
 573                     gp_Vec norm1,norm2,d1u,d1v;
 574                     gp_Pnt ptbid;
 575                     Standard_Integer indextg;
 576                     gp_Vec tgline(PW.TangentAtLine(indextg));
 577                     PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
 578                     Surf1->D1(locu,locv,ptbid,d1u,d1v);
 579                     norm1 = d1u.Crossed(d1v);
 580                     PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
 581                     Surf2->D1(locu,locv,ptbid,d1u,d1v);
 582                     norm2 = d1u.Crossed(d1v);
 583                     if(tgline.DotCross(norm2,norm1)>0.) {
 584                       trans1 = IntSurf_Out;
 585                       trans2 = IntSurf_In;
 586                     }
 587                     else {
 588                       trans1 = IntSurf_In;
 589                       trans2 = IntSurf_Out;
 590                     }
 591
 592                     Standard_Real TolTang = TolTangency;
 593                     Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
 594                     IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
 595                     IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
 596
 597                     if(wline->NbVertex() == 0) {
 598                       IntPatch_Point vtx;
 599                       IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
 600                       POn2S.Parameters(pu1,pv1,pu2,pv2);
 601                       vtx.SetValue(Point3dDebut,TolTang,Standard_False);
 602                       vtx.SetParameters(pu1,pv1,pu2,pv2);
 603                       vtx.SetParameter(1);
 604                       wline->AddVertex(vtx);
 605
 606                       POn2S = PW.Line()->Value(wline->NbPnts());
 607                       POn2S.Parameters(pu1,pv1,pu2,pv2);
 608                       vtx.SetValue(Point3dFin,TolTang,Standard_False);
 609                       vtx.SetParameters(pu1,pv1,pu2,pv2);
 610                       vtx.SetParameter(wline->NbPnts());
 611                       wline->AddVertex(vtx);
 612                     }
 613
 614                     lignetrouvee = Standard_True;
 615                     AddWLine(SLin, wline, Deflection);
 616                     empt = Standard_False;
 617                   }// !RejetLigne
 618                 }// PW.NbPoints()>2
 619               }// done is True
 620             }// dminiPointLigne > SeuildPointLigne
 621           }// HasStartPoint
 622         }// TabPtDep[nbps2]==0
 623       } while( nbp>5 && ( !( ( (NombreDePointsDeDepartDuCheminement >= 3) && lignetrouvee ) ||
 624         ( (NombreDePointsDeDepartDuCheminement-3>=nbp) && !lignetrouvee ) ) ) );
 625
 626       delete [] TabPtDep;
 627     }// for( ls ...
 628
 629     delete [] TabL;
 630   }// nbLigSec >= 1
 631
 632   Standard_Real UminLig1,VminLig1,UmaxLig1,VmaxLig1;
 633   Standard_Real UminLig2,VminLig2,UmaxLig2,VmaxLig2;
 634
 635   UminLig1=VminLig1=UminLig2=VminLig2=RealLast();
 636   UmaxLig1=VmaxLig1=UmaxLig2=VmaxLig2=-UminLig1;
 637
 638   Standard_Integer z;
 639   for(z=1; z <= nbTanZon; z++) {
 640     const Intf_TangentZone& TangentZone=Interference.ZoneValue(z);
 641     for(Standard_Integer pz=1; pz<=TangentZone.NumberOfPoints(); pz++) {
 642       SectionPointToParameters(TangentZone.GetPoint(pz),Poly1,Poly2,U1,V1,U2,V2);
 643
 644       if(U1>UmaxLig1) UmaxLig1=U1;
 645       if(V1>VmaxLig1) VmaxLig1=V1;
 646       if(U2>UmaxLig2) UmaxLig2=U2;
 647       if(V2>VmaxLig2) VmaxLig2=V2;
 648
 649       if(U1<UminLig1) UminLig1=U1;
 650       if(V1<VminLig1) VminLig1=V1;
 651       if(U2<UminLig2) UminLig2=U2;
 652       if(V2<VminLig2) VminLig2=V2;
 653     }
 654   }
 655
 656   for(z=1; z <= nbTanZon; z++) {
 657     const Intf_TangentZone& TangentZone=Interference.ZoneValue(z);
 658     Standard_Integer pz;
 659     for( pz=1; pz<=TangentZone.NumberOfPoints(); pz++) {
 660       SectionPointToParameters(TangentZone.GetPoint(pz),Poly1,Poly2,U1,V1,U2,V2);
 661
 662       StartParams(1) = U1;
 663       StartParams(2) = V1;
 664       StartParams(3) = U2;
 665       StartParams(4) = V2;
 666
 667       HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
 668       if(HasStartPoint) {
 669         StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
 670         NbLigCalculee = SLin.Length();
 671         dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
 672         Standard_Integer l;
 673         for( l = 1; (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne); l++) {
 674           const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
 675
 676           if (IsPointOnLine(StartPOn2S, testwline, Deflection)) {
 677             dminiPointLigne = 0.0;
 678           }
 679         }// for( l ...
 680
 681         if(dminiPointLigne > SeuildPointLigne) {
 682           PW.Perform(StartParams,UminLig1,VminLig1,UminLig2,VminLig2,UmaxLig1,VmaxLig1,UmaxLig2,VmaxLig2);
 683           if(PW.IsDone()) {
 684             if(PW.NbPoints()>2) {
 685               RejetLigne = Standard_False;
 686               Point3dDebut = PW.Value(1).Value();
 687               const IntSurf_PntOn2S& PointFin = PW.Value(PW.NbPoints());
 688               Point3dFin   = PointFin.Value();
 689               for(ver=1 ; ver<= NbLigCalculee ; ver++) {
 690                 const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
 691
 692                 // Check end point if it is on existing line.
 693                 // Start point is checked before.
 694                 if (IsPointOnLine(PointFin, verwline, Deflection)) {
 695                   RejetLigne = Standard_True;
 696                   break;
 697                 }
 698
 699                 const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
 700                 const IntSurf_PntOn2S& verPointFin   = verwline->Point(verwline->NbPnts());
 701                 if( (Point3dDebut.Distance(verPointDebut.Value()) < TolTangency) ||
 702                     (Point3dFin.Distance(verPointFin.Value()) < TolTangency))
 703                 {
 704                   RejetLigne = Standard_True;
 705                   break;
 706                 }
 707               }
 708
 709               if(RejetLigne)
 710               {
 711                 DublicateOfLinesProcessing(PW, ver, SLin, RejetLigne);
 712               }
 713
 714               if(!RejetLigne) {
 715                 IntSurf_TypeTrans trans1,trans2;
 716                 Standard_Real locu,locv;
 717                 gp_Vec norm1,norm2,d1u,d1v;
 718                 gp_Pnt ptbid;
 719                 Standard_Integer indextg;
 720                 gp_Vec tgline(PW.TangentAtLine(indextg));
 721                 PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
 722                 Surf1->D1(locu,locv,ptbid,d1u,d1v);
 723                 norm1 = d1u.Crossed(d1v);
 724                 PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
 725                 Surf2->D1(locu,locv,ptbid,d1u,d1v);
 726                 norm2 = d1u.Crossed(d1v);
 727                 if(tgline.DotCross(norm2,norm1)>0.) {
 728                   trans1 = IntSurf_Out;
 729                   trans2 = IntSurf_In;
 730                 }
 731                 else {
 732                   trans1 = IntSurf_In;
 733                   trans2 = IntSurf_Out;
 734                 }
 735
 736                 Standard_Real TolTang = TolTangency;
 737                 Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
 738                 IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
 739                 IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
 740
 741                 if(wline->NbVertex() == 0) {
 742                   IntPatch_Point vtx;
 743                   IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
 744                   POn2S.Parameters(pu1,pv1,pu2,pv2);
 745                   vtx.SetValue(Point3dDebut,TolTang,Standard_False);
 746                   vtx.SetParameters(pu1,pv1,pu2,pv2);
 747                   vtx.SetParameter(1);
 748                   wline->AddVertex(vtx);
 749
 750                   POn2S = PW.Line()->Value(wline->NbPnts());
 751                   POn2S.Parameters(pu1,pv1,pu2,pv2);
 752                   vtx.SetValue(Point3dFin,TolTang,Standard_False);
 753                   vtx.SetParameters(pu1,pv1,pu2,pv2);
 754                   vtx.SetParameter(wline->NbPnts());
 755                   wline->AddVertex(vtx);
 756                 }
 757
 758                 AddWLine(SLin, wline, Deflection);
 759                 empt = Standard_False;
 760               }// if !RejetLigne
 761             }// PW.NbPoints()>2
 762           }// done is True
 763         }// dminiPointLigne > SeuildPointLigne
 764       }// HasStartPoint
 765     }// for( pz ...
 766   }// for( z ...
 767 }
 768
 769 //==================================================================================
 770 // function : Perform
 771 // purpose  :
 772 //==================================================================================
 773 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)&    Surf1,
 774                                            const IntPatch_Polyhedron&  Poly1,
 775                                            const Handle(Adaptor3d_TopolTool)& D1,
 776                                            const Standard_Real   TolTangency,
 777                                            const Standard_Real   Epsilon,
 778                                            const Standard_Real   Deflection,
 779                                            const Standard_Real   Increment)
 780 {
 781   IntPatch_InterferencePolyhedron Interference(Poly1);
 782   empt = Standard_True;
 783   done = Standard_True;
 784   SLin.Clear();
 785
 786   Standard_Integer nbLigSec = Interference.NbSectionLines();
 787   Standard_Integer nbTanZon = Interference.NbTangentZones();
 788
 789   Standard_Integer NbPntOn2SOnLine;
 790   Standard_Integer NbLigCalculee = 0;
 791
 792   Standard_Real U1,U2,V1,V2;
 793   Standard_Real pu1,pu2,pv1,pv2;
 794
 795   TColStd_Array1OfReal StartParams(1,4);
 796   IntWalk_PWalking PW(Surf1,Surf1,TolTangency,Epsilon,Deflection,Increment);
 797
 798   Standard_Real    SeuildPointLigne = 15.0 * Increment * Increment; //-- 10 est insuffisant
 799   Standard_Real    incidence;
 800   Standard_Real    dminiPointLigne;
 801
 802   Standard_Boolean HasStartPoint,RejetLigne;
 803
 804   IntSurf_PntOn2S StartPOn2S;
 805
 806   Standard_Integer ver;
 807
 808   gp_Pnt Point3dDebut,Point3dFin;
 809
 810   if(nbLigSec>=1) {
 811     Standard_Integer ls;
 812     for( ls = 1; ls <= nbLigSec; ls++) {
 813       const Intf_SectionLine& LineSec=Interference.LineValue(ls);
 814       Standard_Integer nbp = LineSec.NumberOfPoints();
 815       Standard_Integer nbps2 = (nbp>3)? (nbp/2) :  1;
 816       Standard_Integer NombreDePointsDeDepartDuCheminement = 0;
 817       Standard_Integer IndicePointdeDepart1 = 0, IndicePointdeDepart2 = 0;
 818       do {
 819         NombreDePointsDeDepartDuCheminement++;
 820         if(NombreDePointsDeDepartDuCheminement == 1) {
 821           incidence = 0.0;
 822           Standard_Integer nsp1;
 823           for( nsp1= nbp/2; nsp1 >= 1; nsp1--) {
 824             SectionPointToParameters(LineSec.GetPoint(nsp1),Poly1,Poly1,U1,V1,U2,V2);
 825             Standard_Real CurrentIncidence =  Abs(U1-U2)+Abs(V1-V2);
 826             if(CurrentIncidence > incidence) {
 827               nbps2 = nsp1;
 828               incidence = CurrentIncidence;
 829             }
 830           }
 831           for( nsp1 = nbp/2; nsp1 <= nbp; nsp1++) {
 832             SectionPointToParameters(LineSec.GetPoint(nsp1),Poly1,Poly1,U1,V1,U2,V2);
 833             Standard_Real CurrentIncidence =  Abs(U1-U2)+Abs(V1-V2);
 834             if(CurrentIncidence > incidence) {
 835               nbps2 = nsp1;
 836               incidence = CurrentIncidence;
 837             }
 838           }
 839
 840           if(nbp<3)
 841             NombreDePointsDeDepartDuCheminement=3;
 842
 843           IndicePointdeDepart1 = nbps2;
 844         }
 845         else if(NombreDePointsDeDepartDuCheminement == 2) {
 846           if(IndicePointdeDepart1 == 1) {
 847             nbps2 = nbp/2;
 848             IndicePointdeDepart2 = nbps2;
 849           }
 850           else {
 851             nbps2 = 1;
 852             IndicePointdeDepart2 = 1;
 853           }
 854         }
 855         else {
 856           if(IndicePointdeDepart1 == nbp)
 857             nbps2 = (IndicePointdeDepart1+IndicePointdeDepart2)/2;
 858           else
 859             nbps2 = nbp;
 860         }
 861
 862         SectionPointToParameters(LineSec.GetPoint(nbps2),Poly1,Poly1,U1,V1,U2,V2);
 863
 864         StartParams(1) = U1;
 865         StartParams(2) = V1;
 866         StartParams(3) = U2;
 867         StartParams(4) = V2;
 868
 869         HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
 870         dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
 871         if(HasStartPoint) {
 872           StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
 873           if(Abs(pu1-pu2)>1e-7 || Abs(pv1-pv2)>1e-7) {
 874             NbLigCalculee = SLin.Length();
 875             Standard_Integer l;
 876             for( l = 1; (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne); l++) {
 877               const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
 878               if( (testwline->IsOutSurf1Box(gp_Pnt2d(pu1,pv1))==Standard_False) &&
 879                 (testwline->IsOutSurf2Box(gp_Pnt2d(pu2,pv2))==Standard_False) &&
 880                 (testwline->IsOutBox(StartPOn2S.Value())==Standard_False) ) {
 881                   NbPntOn2SOnLine = testwline->NbPnts();
 882                   Standard_Integer ll;
 883                   for( ll=1; (ll < NbPntOn2SOnLine) && (dminiPointLigne >= SeuildPointLigne); ll++) {
 884                     Standard_Real t,Au1,Av1,Au2,Av2,Bu1,Bv1,Bu2,Bv2;
 885                     testwline->Point(ll).Parameters(Au1,Av1,Au2,Av2);
 886                     testwline->Point(ll+1).Parameters(Bu1,Bv1,Bu2,Bv2);
 887                     if(Au1>Bu1) {
 888                       t=Au1;
 889                       Au1=Bu1;
 890                       Bu1=t;
 891                     }
 892                     if(Av1>Bv1) {
 893                       t=Av1;
 894                       Av1=Bv1;
 895                       Bv1=t;
 896                     }
 897                     Au1-=1.0e-7;
 898                     Av1-=1.0e-7;
 899                     Bu1+=1.0e-7;
 900                     Bv1+=1.0e-7;
 901
 902                     if((pu1>=Au1) && (pu1<=Bu1) && (pv1>=Av1) && (pv1<=Bv1))
 903                       dminiPointLigne = 0.0;
 904                     else {
 905                       if((pu2>=Au1) && (pu2<=Bu1) && (pv2>=Av1) && (pv2<=Bv1))
 906                         dminiPointLigne = 0.0;
 907                     }
 908                   }// for( ll ...
 909               }// if ...
 910             }// for( l ...
 911
 912             if(dminiPointLigne > SeuildPointLigne) {
 913               PW.Perform(StartParams);
 914               if(PW.IsDone()) {
 915                 if(PW.NbPoints()>2) {
 916                   RejetLigne = Standard_False;
 917                   Point3dDebut = PW.Value(1).Value();
 918                   Point3dFin   = PW.Value(PW.NbPoints()).Value();
 919                   for(ver=1 ; ver<= NbLigCalculee ; ver++) {
 920                     const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
 921                     const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
 922                     const IntSurf_PntOn2S& verPointFin = verwline->Point(verwline->NbPnts());
 923                     if( (Point3dDebut.Distance(verPointDebut.Value()) < TolTangency) ||
 924                         (Point3dFin.Distance(verPointFin.Value()) < TolTangency))
 925                     {
 926                       RejetLigne = Standard_True;
 927                       break;
 928                     }
 929                   }
 930
 931                   if(RejetLigne)
 932                   {
 933                     DublicateOfLinesProcessing(PW, ver, SLin, RejetLigne);
 934                   }
 935
 936                   if(!RejetLigne) {
 937                     IntSurf_TypeTrans trans1,trans2;
 938                     Standard_Real locu,locv;
 939                     gp_Vec norm1,norm2,d1u,d1v;
 940                     gp_Pnt ptbid;
 941                     Standard_Integer indextg;
 942                     gp_Vec tgline(PW.TangentAtLine(indextg));
 943                     PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
 944                     Surf1->D1(locu,locv,ptbid,d1u,d1v);
 945                     norm1 = d1u.Crossed(d1v);
 946                     PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
 947                     Surf1->D1(locu,locv,ptbid,d1u,d1v);
 948                     norm2 = d1u.Crossed(d1v);
 949                     if (tgline.DotCross(norm2,norm1)>0.) {
 950                       trans1 = IntSurf_Out;
 951                       trans2 = IntSurf_In;
 952                     }
 953                     else {
 954                       trans1 = IntSurf_In;
 955                       trans2 = IntSurf_Out;
 956                     }
 957
 958                     IntSurf_LineOn2S LineOn2S;
 959                     Standard_Integer nbpw,imin,imax,i;
 960                     nbpw = PW.Line()->NbPoints();
 961                     Standard_Real u1,v1,u2,v2;
 962                     i=0;
 963                     do {
 964                       i++;
 965                       imin=i;
 966                       const IntSurf_PntOn2S& Pi   = PW.Line()->Value(i);
 967                       Pi.Parameters(u1,v1,u2,v2);
 968                     } while((i<nbpw)&&(Abs(u1-u2)<=1e-6 && Abs(v1-v2)<=1e-6));
 969
 970                     if(imin>2)
 971                       imin--;
 972
 973                     i=nbpw+1;
 974                     do {
 975                       i--;
 976                       imax=i;
 977                       const IntSurf_PntOn2S& Pi   = PW.Line()->Value(i);
 978                       Pi.Parameters(u1,v1,u2,v2);
 979                     } while((i>2)&&(Abs(u1-u2)<=1e-6 && Abs(v1-v2)<=1e-6));
 980
 981                     if(imax<nbpw)
 982                       imax++;
 983
 984                     if(imin<imax) {
 985                       Handle(IntSurf_LineOn2S) PWLine = new IntSurf_LineOn2S();
 986                       for(i=imin;i<=imax;i++)
 987                         PWLine->Add(PW.Line()->Value(i));
 988
 989                       Standard_Real TolTang = TolTangency;
 990                       Handle(IntPatch_WLine) wline = new IntPatch_WLine(PWLine,Standard_False,trans1,trans2);
 991                       const IntSurf_PntOn2S& POn2SDeb = wline->Point(1);
 992                       const IntSurf_PntOn2S& POn2SFin = wline->Point(wline->NbPnts());
 993                       if((POn2SDeb.Value()).Distance(POn2SFin.Value()) <= TolTangency) {
 994                         Standard_Real u1t,v1t,u2t,v2t;
 995                         POn2SDeb.Parameters(u1t,v1t,u2t,v2t);
 996                         IntPatch_Point vtx;
 997                         vtx.SetValue(POn2SDeb.Value(),TolTang,Standard_False);
 998                         vtx.SetParameters(u2t,v2t,u1t,v1t);
 999                         vtx.SetParameter(wline->NbPnts());
1000                         wline->SetPoint(wline->NbPnts(),vtx);
1001                       }
1002                       IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf1,Standard_True,TolTang);
1003                       if(wline->NbVertex() == 0) {
1004                         IntPatch_Point vtx;
1005                         IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
1006                         POn2S.Parameters(pu1,pv1,pu2,pv2);
1007                         vtx.SetValue(Point3dDebut,TolTang,Standard_False);
1008                         vtx.SetParameters(pu1,pv1,pu2,pv2);
1009                         vtx.SetParameter(1);
1010                         wline->AddVertex(vtx);
1011
1012                         POn2S = PW.Line()->Value(wline->NbPnts());
1013                         POn2S.Parameters(pu1,pv1,pu2,pv2);
1014                         vtx.SetValue(Point3dFin,TolTang,Standard_False);
1015                         vtx.SetParameters(pu1,pv1,pu2,pv2);
1016                         vtx.SetParameter(wline->NbPnts());
1017                         wline->AddVertex(vtx);
1018                       }
1019                       SLin.Append(wline);
1020                       empt = Standard_False;
1021                     }// imin<imax
1022                   }// !RejetLigne
1023                 }// PW.NbPoints()>2
1024               }// done is True
1025             }// dminiPointLigne > SeuildPointLigne
1026           }// Abs || Abs
1027         }// HasStartPoint
1028       } while(nbp>5 && NombreDePointsDeDepartDuCheminement<3);
1029     }// for( ls ...
1030   }// nbLigSec>=1
1031
1032   Standard_Integer z;
1033   for( z = 1; z <= nbTanZon; z++) {
1034     const Intf_TangentZone& TangentZone=Interference.ZoneValue(z);
1035     for(Standard_Integer pz=1; pz<=TangentZone.NumberOfPoints(); pz++) {
1036       SectionPointToParameters(TangentZone.GetPoint(pz),Poly1,Poly1,U1,V1,U2,V2);
1037
1038       StartParams(1) = U1;
1039       StartParams(2) = V1;
1040       StartParams(3) = U2;
1041       StartParams(4) = V2;
1042
1043       HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
1044       if(HasStartPoint) {
1045         StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
1046         if(Abs(pu1-pu2)>1e-7 || Abs(pv1-pv2)>1e-7) {
1047           NbLigCalculee = SLin.Length();
1048           dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
1049           Standard_Integer l;
1050           for( l = 1; (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne); l++) {
1051             const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
1052             if( (testwline->IsOutSurf1Box(gp_Pnt2d(pu1,pv1))==Standard_False) &&
1053               (testwline->IsOutSurf2Box(gp_Pnt2d(pu2,pv2))==Standard_False) &&
1054               (testwline->IsOutBox(StartPOn2S.Value())==Standard_False) ) {
1055                 NbPntOn2SOnLine = testwline->NbPnts();
1056                 Standard_Integer ll;
1057                 for( ll = 1; (ll < NbPntOn2SOnLine) && (dminiPointLigne >= SeuildPointLigne); ll++) {
1058                   Standard_Real t,Au1,Av1,Au2,Av2,Bu1,Bv1,Bu2,Bv2;
1059                   testwline->Point(ll).Parameters(Au1,Av1,Au2,Av2);
1060                   testwline->Point(ll+1).Parameters(Bu1,Bv1,Bu2,Bv2);
1061                   if(Au1>Bu1) {
1062                     t=Au1;
1063                     Au1=Bu1;
1064                     Bu1=t;
1065                   }
1066                   if(Av1>Bv1) {
1067                     t=Av1;
1068                     Av1=Bv1;
1069                     Bv1=t;
1070                   }
1071                   Au1-=1.0e-7;
1072                   Av1-=1.0e-7;
1073                   Bu1+=1.0e-7;
1074                   Bv1+=1.0e-7;
1075                   if((pu1>=Au1) && (pu1<=Bu1) && (pv1>=Av1) && (pv1<=Bv1))
1076                     dminiPointLigne = 0.0;
1077                   else {
1078                     if((pu2>=Au1) && (pu2<=Bu1) && (pv2>=Av1) && (pv2<=Bv1))
1079                       dminiPointLigne = 0.0;
1080                   }
1081                 }// for( ll ...
1082             }// if ...
1083           }// for( l ...
1084
1085           if(dminiPointLigne > SeuildPointLigne) {
1086             PW.Perform(StartParams);
1087             if(PW.IsDone()) {
1088               if(PW.NbPoints()>2) {
1089                 RejetLigne = Standard_False;
1090                 Point3dDebut = PW.Value(1).Value();
1091                 Point3dFin   = PW.Value(PW.NbPoints()).Value();
1092                 for( ver = 1 ; ver<= NbLigCalculee ; ver++) {
1093                   const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
1094                   const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
1095                   const IntSurf_PntOn2S& verPointFin = verwline->Point(verwline->NbPnts());
1096                   if( (Point3dDebut.Distance(verPointDebut.Value()) < TolTangency) ||
1097                       (Point3dFin.Distance(verPointFin.Value()) < TolTangency))
1098                   {
1099                     RejetLigne = Standard_True;
1100                     break;
1101                   }
1102                 }
1103
1104                 if(RejetLigne)
1105                 {
1106                   DublicateOfLinesProcessing(PW, ver, SLin, RejetLigne);
1107                 }
1108
1109                 if(!RejetLigne) {
1110                   IntSurf_TypeTrans trans1,trans2;
1111                   Standard_Real locu,locv;
1112                   gp_Vec norm1,norm2,d1u,d1v;
1113                   gp_Pnt ptbid;
1114                   Standard_Integer indextg;
1115                   gp_Vec tgline(PW.TangentAtLine(indextg));
1116                   PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
1117                   Surf1->D1(locu,locv,ptbid,d1u,d1v);
1118                   norm1 = d1u.Crossed(d1v);
1119                   PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
1120                   Surf1->D1(locu,locv,ptbid,d1u,d1v);
1121                   norm2 = d1u.Crossed(d1v);
1122                   if(tgline.DotCross(norm2,norm1)>0.) {
1123                     trans1 = IntSurf_Out;
1124                     trans2 = IntSurf_In;
1125                   }
1126                   else {
1127                     trans1 = IntSurf_In;
1128                     trans2 = IntSurf_Out;
1129                   }
1130
1131                   IntSurf_LineOn2S LineOn2S;
1132                   Standard_Integer nbp,imin,imax,i;
1133                   nbp = PW.Line()->NbPoints();
1134                   Standard_Real u1,v1,u2,v2;
1135                   i=0;
1136                   do {
1137                     i++;
1138                     imin=i;
1139                     const IntSurf_PntOn2S& Pi   = PW.Line()->Value(i);
1140                     Pi.Parameters(u1,v1,u2,v2);
1141                   } while((i<nbp)&&(Abs(u1-u2)<=1e-6 && Abs(v1-v2)<=1e-6));
1142
1143                   if(imin>2)
1144                     imin--;
1145
1146                   i=nbp+1;
1147                   do {
1148                     i--;
1149                     imax=i;
1150                     const IntSurf_PntOn2S& Pi   = PW.Line()->Value(i);
1151                     Pi.Parameters(u1,v1,u2,v2);
1152                   } while((i>2)&&(Abs(u1-u2)<=1e-6 && Abs(v1-v2)<=1e-6));
1153
1154                   if(imax<nbp)
1155                     imax++;
1156
1157                   if(imin<imax) {
1158                     Handle(IntSurf_LineOn2S) PWLine = new IntSurf_LineOn2S();
1159                     for(i=imin;i<=imax;i++)
1160                       PWLine->Add(PW.Line()->Value(i));
1161
1162                     Standard_Real TolTang = TolTangency;
1163                     Handle(IntPatch_WLine) wline = new IntPatch_WLine(PWLine,Standard_False,trans1,trans2);
1164                     const IntSurf_PntOn2S& POn2SDeb = wline->Point(1);
1165                     const IntSurf_PntOn2S& POn2SFin = wline->Point(wline->NbPnts());
1166                     if((POn2SDeb.Value()).Distance(POn2SFin.Value()) <= TolTangency) {
1167                       Standard_Real u1t,v1t,u2t,v2t;
1168                       POn2SDeb.Parameters(u1t,v1t,u2t,v2t);
1169                       IntPatch_Point vtx;
1170                       vtx.SetValue(POn2SDeb.Value(),TolTang,Standard_False);
1171                       vtx.SetParameters(u2t,v2t,u1t,v1t);
1172                       vtx.SetParameter(wline->NbPnts());
1173                       wline->SetPoint(wline->NbPnts(),vtx);
1174                     }
1175
1176                     IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf1,Standard_True,TolTang);
1177
1178                     if(wline->NbVertex() == 0) {
1179                       IntPatch_Point vtx;
1180                       IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
1181                       POn2S.Parameters(pu1,pv1,pu2,pv2);
1182                       vtx.SetValue(Point3dDebut,TolTang,Standard_False);
1183                       vtx.SetParameters(pu1,pv1,pu2,pv2);
1184                       vtx.SetParameter(1);
1185                       wline->AddVertex(vtx);
1186
1187                       POn2S = PW.Line()->Value(wline->NbPnts());
1188                       POn2S.Parameters(pu1,pv1,pu2,pv2);
1189                       vtx.SetValue(Point3dFin,TolTang,Standard_False);
1190                       vtx.SetParameters(pu1,pv1,pu2,pv2);
1191                       vtx.SetParameter(wline->NbPnts());
1192                       wline->AddVertex(vtx);
1193                     }
1194
1195                     SLin.Append(wline);
1196                     empt = Standard_False;
1197                   }// imin<imax
1198                 }// !RejetLigne
1199               }// PW.NbPoints()>2
1200             }// done a True
1201           }// dminiPointLigne > SeuildPointLigne
1202         }// Abs || Abs
1203       }// HasStartPoint
1204     }// for ( pz ...
1205   }// for( z ...
1206 }
1207
1208 //==================================================================================
1209 // function : NewLine
1210 // purpose  :
1211 //==================================================================================
1212 Handle(IntPatch_Line) IntPatch_PrmPrmIntersection::NewLine (const Handle(Adaptor3d_HSurface)&    Surf1,
1213                                                            const Handle(Adaptor3d_HSurface)&    Surf2,
1214                                                            const Standard_Integer NumLine,
1215                                                            const Standard_Integer Low,
1216                                                            const Standard_Integer High,
1217                                                            const Standard_Integer NbPntsToInsert) const
1218 {
1219   Standard_Integer NbPnts = NbPntsToInsert + High - Low;
1220   if(NumLine>NbLines() || NumLine<1  || Low>=High )
1221     Standard_OutOfRange::Raise(" IntPatch_PrmPrmIntersection NewLine ");
1222   //------------------------------------------------------------------
1223   //--  Indice     :   Low       Low+1     I    I+1         High    --
1224   //--                                                              --
1225   //--  Abs.Curv.  :  S(Low)              S(I)  S(I+1)      S(High) --
1226   //--                                                              --
1227   //--                On echantillonne a abcisse curviligne         --
1228   //--                constante.                                    --
1229   //--                L abcisse est calculee sur les params U1,V1   --
1230   //------------------------------------------------------------------
1231   TColStd_Array1OfReal U1(Low,High);
1232   TColStd_Array1OfReal V1(Low,High);
1233   TColStd_Array1OfReal U2(Low,High);
1234   TColStd_Array1OfReal V2(Low,High);
1235   TColStd_Array1OfReal AC(Low,High);
1236
1237   Standard_Real s,ds;
1238   Handle(IntPatch_WLine) TheLine = Handle(IntPatch_WLine)::DownCast(Line(NumLine));
1239   const IntSurf_PntOn2S& Point=TheLine->Point(Low);
1240   Standard_Real u1,v1,u2,v2;
1241   Point.Parameters(u1,v1,u2,v2);
1242   U1(Low) = u1;
1243   V1(Low) = v1;
1244   U2(Low) = u2;
1245   V2(Low) = v2;
1246   AC(Low) =0.0;
1247
1248   IntWalk_PWalking PW(Surf1,Surf2,0.000001,0.000001,0.001,0.001);
1249
1250   Standard_Integer i;
1251   for(i=Low+1; i<=High; i++)
1252   {
1253     const IntSurf_PntOn2S& Pointi=TheLine->Point(i);
1254     Pointi.Parameters(u1,v1,u2,v2);
1255     U1(i) = u1;
1256     V1(i) = v1;
1257     U2(i) = u2;
1258     V2(i) = v2;
1259
1260     Standard_Real du1=u1-U1(i-1);
1261     Standard_Real dv1=v1-V1(i-1);
1262
1263     AC(i) = AC(i-1) + Sqrt((du1*du1)+(dv1*dv1));
1264   }
1265
1266   Handle(IntSurf_LineOn2S) ResultPntOn2SLine = new IntSurf_LineOn2S();
1267
1268   IntSurf_PntOn2S StartPOn2S;
1269   TColStd_Array1OfReal StartParams(1,4);
1270
1271   ResultPntOn2SLine->Add(TheLine->Point(Low));
1272
1273   ds = AC(High) / (NbPnts-1);
1274   Standard_Integer Indice = Low;
1275
1276   Standard_Real dsmin = ds*0.3;
1277   Standard_Real smax  = AC(High);
1278
1279   for(i=2,s=ds; (i<NbPnts)&&(s<smax); i++,s+=ds)
1280   {
1281     while(AC(Indice+1) <= s)
1282     {
1283       ResultPntOn2SLine->Add(TheLine->Point(Indice));
1284       Indice++;
1285     }
1286     Standard_Real a = s - AC(Indice);
1287     Standard_Real b = AC(Indice+1) - s;
1288     Standard_Real nab = 1.0/(a+b);
1289     //----------------------------------------------------------
1290     //-- Verification :  Si Dist au prochain  point < dsmin   --
1291     //--                 Si Dist au precedent point < dsmin   --
1292     //--                                                      --
1293     //----------------------------------------------------------
1294     if((nab > ds)&&(a>dsmin)&&(b>dsmin))
1295     {
1296       StartParams(1) = (U1(Indice) * b   +  U1(Indice+1) * a) * nab;
1297       StartParams(2) = (V1(Indice) * b   +  V1(Indice+1) * a) * nab;
1298       StartParams(3) = (U2(Indice) * b   +  U2(Indice+1) * a) * nab;
1299       StartParams(4) = (V2(Indice) * b   +  V2(Indice+1) * a) * nab;
1300
1301       Standard_Boolean HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
1302       if(HasStartPoint)
1303         ResultPntOn2SLine->Add(StartPOn2S);
1304     }
1305     else
1306       s+=dsmin;
1307   }
1308
1309   ResultPntOn2SLine->Add(TheLine->Point(High));
1310
1311   return(new IntPatch_WLine(ResultPntOn2SLine,Standard_False));
1312 }
1313
1314 //==================================================================================
1315 // function : SectionPointToParameters
1316 // purpose  :
1317 //==================================================================================
1318 void SectionPointToParameters(const Intf_SectionPoint& Sp,
1319                               const IntPatch_Polyhedron& Poly1,
1320                               const IntPatch_Polyhedron& Poly2,
1321                               Standard_Real& u1,
1322                               Standard_Real& v1,
1323                               Standard_Real& u2,
1324                               Standard_Real& v2)
1325 {
1326   Intf_PIType       typ;
1327   Standard_Integer  Adr1,Adr2;
1328   Standard_Real     Param,u,v;
1329   gp_Pnt P(Sp.Pnt());
1330
1331   Standard_Integer Pt1,Pt2,Pt3;
1332
1333   Sp.InfoFirst(typ,Adr1,Adr2,Param);
1334   switch(typ) {
1335   case Intf_VERTEX:   //-- Adr1 est le numero du vertex
1336     {
1337       Poly1.Parameters(Adr1,u1,v1);
1338       break;
1339     }
1340   case Intf_EDGE:
1341     {
1342       Poly1.Parameters(Adr1,u1,v1);
1343       Poly1.Parameters(Adr2,u,v);
1344       u1+= Param * (u-u1);
1345       v1+= Param * (v-v1);
1346       break;
1347     }
1348   case Intf_FACE:
1349     {
1350       Standard_Real ua,va,ub,vb,uc,vc,ca,cb,cc,cabc;
1351       Poly1.Triangle(Adr1,Pt1,Pt2,Pt3);
1352       gp_Pnt PA(Poly1.Point(Pt1));
1353       gp_Pnt PB(Poly1.Point(Pt2));
1354       gp_Pnt PC(Poly1.Point(Pt3));
1355       Poly1.Parameters(Pt1,ua,va);
1356       Poly1.Parameters(Pt2,ub,vb);
1357       Poly1.Parameters(Pt3,uc,vc);
1358       gp_Vec Normale(gp_Vec(PA,PB).Crossed(gp_Vec(PA,PC)));
1359       cc = (gp_Vec(PA,PB).Crossed(gp_Vec(PA,P))).Dot(Normale);
1360       ca = (gp_Vec(PB,PC).Crossed(gp_Vec(PB,P))).Dot(Normale);
1361       cb = (gp_Vec(PC,PA).Crossed(gp_Vec(PC,P))).Dot(Normale);
1362       cabc = ca + cb + cc;
1363
1364       ca/=cabc;     cb/=cabc;       cc/=cabc;
1365
1366       u1 = ca * ua + cb * ub + cc * uc;
1367       v1 = ca * va + cb * vb + cc * vc;
1368       break;
1369     }
1370   default:
1371     {
1372       //-- cout<<" Default dans SectionPointToParameters "<<endl;
1373       break;
1374     }
1375   }
1376
1377
1378   Sp.InfoSecond(typ,Adr1,Adr2,Param);
1379   switch(typ) {
1380   case Intf_VERTEX:   //-- Adr1 est le numero du vertex
1381     {
1382       Poly2.Parameters(Adr1,u2,v2);
1383       break;
1384     }
1385   case Intf_EDGE:
1386     {
1387       Poly2.Parameters(Adr1,u2,v2);
1388       Poly2.Parameters(Adr2,u,v);
1389       u2+= Param * (u-u2);
1390       v2+= Param * (v-v2);
1391       break;
1392     }
1393   case Intf_FACE:
1394     {
1395       Standard_Real ua,va,ub,vb,uc,vc,ca,cb,cc,cabc;
1396       Poly2.Triangle(Adr1,Pt1,Pt2,Pt3);
1397       gp_Pnt PA(Poly2.Point(Pt1));
1398       gp_Pnt PB(Poly2.Point(Pt2));
1399       gp_Pnt PC(Poly2.Point(Pt3));
1400       Poly2.Parameters(Pt1,ua,va);
1401       Poly2.Parameters(Pt2,ub,vb);
1402       Poly2.Parameters(Pt3,uc,vc);
1403       gp_Vec Normale(gp_Vec(PA,PB).Crossed(gp_Vec(PA,PC)));
1404       cc = (gp_Vec(PA,PB).Crossed(gp_Vec(PA,P))).Dot(Normale);
1405       ca = (gp_Vec(PB,PC).Crossed(gp_Vec(PB,P))).Dot(Normale);
1406       cb = (gp_Vec(PC,PA).Crossed(gp_Vec(PC,P))).Dot(Normale);
1407       cabc = ca + cb + cc;
1408
1409       ca/=cabc;     cb/=cabc;       cc/=cabc;
1410
1411       u2 = ca * ua + cb * ub + cc * uc;
1412       v2 = ca * va + cb * vb + cc * vc;
1413       break;
1414     }
1415   default:
1416     {
1417       //-- cout<<" Default dans SectionPointToParameters "<<endl;
1418       break;
1419     }
1420   }
1421 }
1422
1423 //==================================================================================
1424 // function : RemplitLin
1425 // purpose  :
1426 //==================================================================================
1427 void IntPatch_PrmPrmIntersection::RemplitLin(const Standard_Integer x1,
1428                                              const Standard_Integer y1,
1429                                              const Standard_Integer z1,
1430                                              const Standard_Integer x2,
1431                                              const Standard_Integer y2,
1432                                              const Standard_Integer z2,
1433                                              IntPatch_PrmPrmIntersection_T3Bits& Map) const
1434 {
1435   int xg,yg,zg;
1436   xg=x1-x2; if(xg<0) xg=-xg;
1437   yg=y1-y2; if(yg<0) yg=-yg;
1438   zg=z1-z2; if(zg<0) zg=-zg;
1439   if(DansGrille(x1) && DansGrille(y1) && DansGrille(z1)) {
1440     Standard_Integer t = GrilleInteger(x1,y1,z1);
1441     Map.Add(t);
1442   }
1443   if(xg<=1 && yg<=1 && zg<=1) return;
1444   xg = (x1+x2)>>1;
1445   yg = (y1+y2)>>1;
1446   zg = (z1+z2)>>1;
1447   RemplitLin(x1,y1,z1,xg,yg,zg,Map);
1448   RemplitLin(x2,y2,z2,xg,yg,zg,Map);
1449 }
1450
1451 //==================================================================================
1452 // function : RemplitTri
1453 // purpose  :
1454 //==================================================================================
1455 void IntPatch_PrmPrmIntersection::RemplitTri(const Standard_Integer x1,
1456                                              const Standard_Integer y1,
1457                                              const Standard_Integer z1,
1458                                              const Standard_Integer x2,
1459                                              const Standard_Integer y2,
1460                                              const Standard_Integer z2,
1461                                              const Standard_Integer x3,
1462                                              const Standard_Integer y3,
1463                                              const Standard_Integer z3,
1464                                              IntPatch_PrmPrmIntersection_T3Bits& Map) const
1465 {
1466   if(x1==x2 && x1==x3 && y1==y2 && y1==y3 && z1==z2 && z1==z3) {
1467     if(DansGrille(x1) && DansGrille(y1) && DansGrille(z1)) {
1468       Standard_Integer t = GrilleInteger(x1,y1,z1);
1469       Map.Add(t);
1470     }
1471     return;
1472   }
1473   else {
1474     Standard_Integer xg=(x1+x2+x3)/3;
1475     Standard_Integer yg=(y1+y2+y3)/3;
1476     Standard_Integer zg=(z1+z2+z3)/3;
1477     if(xg==x1 && yg==y1 && zg==z1) {
1478       RemplitLin(x1,y1,z1,x2,y2,z2,Map);
1479       RemplitLin(x1,y1,z1,x3,y3,z3,Map);
1480       return;
1481     }
1482     if(xg==x2 && yg==y2 && zg==z2) {
1483       RemplitLin(x2,y2,z2,x1,y1,z1,Map);
1484       RemplitLin(x2,y2,z2,x3,y3,z3,Map);
1485       return;
1486     }
1487     if(xg==x3 && yg==y3 && zg==z3) {
1488       RemplitLin(x3,y3,z3,x2,y2,z2,Map);
1489       RemplitLin(x3,y3,z3,x1,y1,z1,Map);
1490       return;
1491     }
1492     if(DansGrille(xg) && DansGrille(yg) && DansGrille(zg)) {
1493       Standard_Integer t = GrilleInteger(xg,yg,zg);
1494       Map.Add(t);
1495     }
1496     if(xg!=x3 || yg!=y3 || zg!=z3) RemplitTri(x1,y1,z1, x2,y2,z2, xg,yg,zg, Map);
1497     if(xg!=x1 || yg!=y1 || zg!=z1) RemplitTri(xg,yg,zg, x2,y2,z2, x3,y3,z3, Map);
1498     if(xg!=x2 || yg!=y2 || zg!=z2) RemplitTri(x1,y1,z1, xg,yg,zg, x3,y3,z3, Map);
1499   }
1500 }
1501
1502 //==================================================================================
1503 // function : Remplit
1504 // purpose  :
1505 //==================================================================================
1506 void IntPatch_PrmPrmIntersection::Remplit(const Standard_Integer a,
1507                                           const Standard_Integer b,
1508                                           const Standard_Integer c,
1509                                           IntPatch_PrmPrmIntersection_T3Bits& Map) const
1510 {
1511   int iax,iay,iaz,ibx,iby,ibz,icx,icy,icz;
1512   if(a!=-1) Map.Add(a);
1513   if(b!=-1) Map.Add(b);
1514   if(c!=-1) Map.Add(c);
1515
1516   if(a!=-1 && b!=-1 && c!=-1 ) {
1517     IntegerGrille(a,iax,iay,iaz);
1518     IntegerGrille(b,ibx,iby,ibz);
1519     IntegerGrille(c,icx,icy,icz);
1520     RemplitTri(iax,iay,iaz,ibx,iby,ibz,icx,icy,icz,Map);
1521   }
1522 }
1523
1524
1525
1526 //=======================================================================
1527 //function : Perform
1528 //purpose  :
1529 //=======================================================================
1530 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)&    Surf1,
1531                                            const Handle(Adaptor3d_TopolTool)& D1,
1532                                            const Handle(Adaptor3d_HSurface)&    Surf2,
1533                                            const Handle(Adaptor3d_TopolTool)& D2,
1534                                            const Standard_Real   TolTangency,
1535                                            const Standard_Real   Epsilon,
1536                                            const Standard_Real   Deflection,
1537                                            const Standard_Real   Increment,
1538                                            IntSurf_ListOfPntOn2S& LOfPnts,
1539                                            const Standard_Boolean RestrictLine)
1540 {
1541   if (LOfPnts.IsEmpty()){
1542     done = Standard_True;
1543     return;
1544   }
1545
1546   empt = Standard_True;
1547   SLin.Clear();
1548
1549   Standard_Real UminLig1,VminLig1,UmaxLig1,VmaxLig1;
1550   Standard_Real UminLig2,VminLig2,UmaxLig2,VmaxLig2;
1551   Standard_Real U1,U2,V1,V2;
1552
1553   UminLig1 = Surf1->FirstUParameter();
1554   VminLig1 = Surf1->FirstVParameter();
1555   UmaxLig1 = Surf1->LastUParameter();
1556   VmaxLig1 = Surf1->LastVParameter();
1557   UminLig2 = Surf2->FirstUParameter();
1558   VminLig2 = Surf2->FirstVParameter();
1559   UmaxLig2 = Surf2->LastUParameter();
1560   VmaxLig2 = Surf2->LastVParameter();
1561
1562   Standard_Real Periods [4];
1563   Periods[0] = (Surf1->IsUPeriodic())? Surf1->UPeriod() : 0.;
1564   Periods[1] = (Surf1->IsVPeriodic())? Surf1->VPeriod() : 0.;
1565   Periods[2] = (Surf2->IsUPeriodic())? Surf2->UPeriod() : 0.;
1566   Periods[3] = (Surf2->IsVPeriodic())? Surf2->VPeriod() : 0.;
1567
1568   IntSurf_ListIteratorOfListOfPntOn2S IterLOP1(LOfPnts);
1569   if (Surf1->IsUClosed() || Surf1->IsVClosed() ||
1570       Surf2->IsUClosed() || Surf2->IsVClosed())
1571   {
1572     Standard_Real TolPar = Precision::PConfusion();
1573     IntSurf_ListOfPntOn2S AdditionalPnts;
1574     Standard_Real NewU1, NewV1, NewU2, NewV2;
1575     for(; IterLOP1.More(); IterLOP1.Next())
1576     {
1577       IntSurf_PntOn2S Pnt = IterLOP1.Value();
1578       Pnt.Parameters(U1, V1, U2, V2);
1579       IntSurf_PntOn2S NewPnt;
1580       if (Surf1->IsUClosed())
1581       {
1582         if (Abs(U1 - Surf1->FirstUParameter()) <= TolPar)
1583         {
1584           NewU1 = Surf1->LastUParameter();
1585           NewPnt.SetValue( NewU1, V1, U2, V2 );
1586           AdditionalPnts.Append(NewPnt);
1587         }
1588         else if (Abs(U1 - Surf1->LastUParameter()) <= TolPar)
1589         {
1590           NewU1 = Surf1->FirstUParameter();
1591           NewPnt.SetValue( NewU1, V1, U2, V2 );
1592           AdditionalPnts.Append(NewPnt);
1593         }
1594       }
1595       if (Surf1->IsVClosed())
1596       {
1597         if (Abs(V1 - Surf1->FirstVParameter()) <= TolPar)
1598         {
1599           NewV1 = Surf1->LastVParameter();
1600           NewPnt.SetValue( U1, NewV1, U2, V2 );
1601           AdditionalPnts.Append(NewPnt);
1602         }
1603         else if (Abs(V1 - Surf1->LastVParameter()) <= TolPar)
1604         {
1605           NewV1 = Surf1->FirstVParameter();
1606           NewPnt.SetValue( U1, NewV1, U2, V2 );
1607           AdditionalPnts.Append(NewPnt);
1608         }
1609       }
1610       if (Surf2->IsUClosed())
1611       {
1612         if (Abs(U2 - Surf2->FirstUParameter()) <= TolPar)
1613         {
1614           NewU2 = Surf2->LastUParameter();
1615           NewPnt.SetValue( U1, V1, NewU2, V2);
1616           AdditionalPnts.Append(NewPnt);
1617         }
1618         else if (Abs(U2 - Surf2->LastUParameter()) <= TolPar)
1619         {
1620           NewU2 = Surf2->FirstUParameter();
1621           NewPnt.SetValue( U1, V1, NewU2, V2);
1622           AdditionalPnts.Append(NewPnt);
1623         }
1624       }
1625       if (Surf2->IsVClosed())
1626       {
1627         if (Abs(V2 - Surf2->FirstVParameter()) <= TolPar)
1628         {
1629           NewV2 = Surf2->LastVParameter();
1630           NewPnt.SetValue( U1, V1, U2, NewV2 );
1631           AdditionalPnts.Append(NewPnt);
1632         }
1633         else if (Abs(V2 - Surf2->LastVParameter()) <= TolPar)
1634         {
1635           NewV2 = Surf2->FirstVParameter();
1636           NewPnt.SetValue( U1, V1, U2, NewV2 );
1637           AdditionalPnts.Append(NewPnt);
1638         }
1639       }
1640     }
1641     //Cut repeated points
1642     for (IterLOP1.Initialize(LOfPnts); IterLOP1.More(); IterLOP1.Next())
1643     {
1644       IntSurf_PntOn2S aPnt = IterLOP1.Value();
1645       aPnt.Parameters(U1, V1, U2, V2);
1646       IntSurf_ListIteratorOfListOfPntOn2S iter2(AdditionalPnts);
1647       while (iter2.More())
1648       {
1649         IntSurf_PntOn2S aNewPnt = iter2.Value();
1650         aNewPnt.Parameters(NewU1, NewV1, NewU2, NewV2);
1651         if (Abs(U1 - NewU1) <= TolPar &&
1652             Abs(V1 - NewV1) <= TolPar &&
1653             Abs(U2 - NewU2) <= TolPar &&
1654             Abs(V2 - NewV2) <= TolPar)
1655           AdditionalPnts.Remove(iter2);
1656         else
1657           iter2.Next();
1658       }
1659     }
1660
1661     LOfPnts.Append(AdditionalPnts);
1662   }
1663
1664   for(IterLOP1.Initialize(LOfPnts); IterLOP1.More(); IterLOP1.Next()){
1665     IntSurf_PntOn2S Pnt = IterLOP1.Value();
1666     Pnt.Parameters(U1, V1, U2, V2);
1667     if(U1>UmaxLig1) UmaxLig1=U1;
1668     if(V1>VmaxLig1) VmaxLig1=V1;
1669     if(U2>UmaxLig2) UmaxLig2=U2;
1670     if(V2>VmaxLig2) VmaxLig2=V2;
1671
1672     if(U1<UminLig1) UminLig1=U1;
1673     if(V1<VminLig1) VminLig1=V1;
1674     if(U2<UminLig2) UminLig2=U2;
1675     if(V2<VminLig2) VminLig2=V2;
1676   }
1677
1678   Standard_Real SeuildPointLigne = 15.0 * Increment * Increment;
1679
1680   Standard_Integer NbLigCalculee = 0, ver;
1681   Standard_Real pu1,pu2,pv1,pv2, dminiPointLigne;
1682   Standard_Boolean HasStartPoint,RejetLigne;
1683   IntSurf_PntOn2S StartPOn2S;
1684   gp_Pnt Point3dDebut,Point3dFin;
1685
1686   TColStd_Array1OfReal StartParams(1,4);
1687   IntWalk_PWalking PW(Surf1,Surf2,TolTangency,Epsilon,Deflection,Increment);
1688
1689   IntSurf_ListIteratorOfListOfPntOn2S IterLOP2(LOfPnts);
1690   for(; IterLOP2.More(); IterLOP2.Next() ){
1691
1692     IntSurf_PntOn2S cPnt = IterLOP2.Value();
1693     cPnt.Parameters(U1, V1, U2, V2);
1694
1695     StartParams(1) = U1;
1696     StartParams(2) = V1;
1697     StartParams(3) = U2;
1698     StartParams(4) = V2;
1699
1700     HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
1701     dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
1702     if(HasStartPoint) {
1703       StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
1704       NbLigCalculee = SLin.Length();
1705       Standard_Integer l;
1706       for( l = 1; (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne); l++) {
1707         const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
1708
1709         if (IsPointOnLine(StartPOn2S, testwline, Deflection)) {
1710           dminiPointLigne = 0.0;
1711         }
1712       }// for( l ...
1713
1714       if(dminiPointLigne > SeuildPointLigne) {
1715         PW.Perform(StartParams,UminLig1,VminLig1,UminLig2,VminLig2,UmaxLig1,VmaxLig1,UmaxLig2,VmaxLig2);
1716         if(PW.IsDone()) {
1717           if(PW.NbPoints()>2)
1718           {
1719             //Try to extend the intersection line to boundary, if it is possible.
1720             PW.PutToBoundary(Surf1, Surf2);
1721
1722             RejetLigne = Standard_False;
1723             Point3dDebut = PW.Value(1).Value();
1724             const IntSurf_PntOn2S& PointFin = PW.Value(PW.NbPoints());
1725             Point3dFin   = PointFin.Value();
1726             for( ver = 1 ; ver<= NbLigCalculee ; ver++) {
1727               const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
1728
1729               // Check end point if it is on existing line.
1730               // Start point is checked before.
1731               if (IsPointOnLine(PointFin, verwline, Deflection)) {
1732                 RejetLigne = Standard_True;
1733                 break;
1734               }
1735
1736               const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
1737               const IntSurf_PntOn2S& verPointFin = verwline->Point(verwline->NbPnts());
1738               if( (Point3dDebut.Distance(verPointDebut.Value()) <= TolTangency) &&
1739                   (Point3dFin.Distance(verPointFin.Value()) <= TolTangency))
1740               {
1741                 RejetLigne = Standard_True;
1742                 break;
1743               }
1744             }
1745
1746             if(RejetLigne)
1747             {
1748               DublicateOfLinesProcessing(PW, ver, SLin, RejetLigne);
1749             }
1750
1751             if(!RejetLigne) {
1752               IntSurf_TypeTrans trans1,trans2;
1753               Standard_Real locu,locv;
1754               gp_Vec norm1,norm2,d1u,d1v;
1755               gp_Pnt ptbid;
1756               Standard_Integer indextg;
1757               gp_Vec tgline(PW.TangentAtLine(indextg));
1758               PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
1759               Surf1->D1(locu,locv,ptbid,d1u,d1v);
1760               norm1 = d1u.Crossed(d1v);
1761               PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
1762               Surf2->D1(locu,locv,ptbid,d1u,d1v);
1763               norm2 = d1u.Crossed(d1v);
1764               if( tgline.DotCross(norm2,norm1) >= 0. ) {
1765                 trans1 = IntSurf_Out;
1766                 trans2 = IntSurf_In;
1767               }
1768               else {
1769                 trans1 = IntSurf_In;
1770                 trans2 = IntSurf_Out;
1771               }
1772
1773               Standard_Real TolTang = TolTangency;
1774               Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
1775               if (RestrictLine){
1776                 IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
1777                 IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
1778               }
1779
1780               if(wline->NbVertex() == 0) {
1781                 IntPatch_Point vtx;
1782                 IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
1783                 POn2S.Parameters(pu1,pv1,pu2,pv2);
1784                 vtx.SetValue(Point3dDebut,TolTang,Standard_False);
1785                 vtx.SetParameters(pu1,pv1,pu2,pv2);
1786                 vtx.SetParameter(1);
1787                 wline->AddVertex(vtx);
1788
1789                 POn2S = PW.Line()->Value(wline->NbPnts());
1790                 POn2S.Parameters(pu1,pv1,pu2,pv2);
1791                 vtx.SetValue(Point3dFin,TolTang,Standard_False);
1792                 vtx.SetParameters(pu1,pv1,pu2,pv2);
1793                 vtx.SetParameter(wline->NbPnts());
1794                 wline->AddVertex(vtx);
1795               }
1796
1797               SeveralWlinesProcessing(Surf1, Surf2, SLin, Periods, trans1, trans2,
1798                                       TolTang, Max(PW.MaxStep(0), PW.MaxStep(1)),
1799                                       Max(PW.MaxStep(2), PW.MaxStep(3)), wline);
1800
1801               AddWLine(SLin, wline, Deflection);
1802               empt = Standard_False;
1803             }// !RejetLigne
1804           }// PW points > 2
1805         }// done is True
1806       }// dminiPointLigne > SeuildPointLigne
1807     }// HasStartPoint
1808   }// for( IterLOP ...
1809   done = Standard_True;
1810   return;
1811 }
1812 //=======================================================================
1813 //function : Perform
1814 //purpose  :
1815 //=======================================================================
1816 void IntPatch_PrmPrmIntersection::Perform(const Handle(Adaptor3d_HSurface)&    Surf1,
1817                                           const Handle(Adaptor3d_TopolTool)& D1,
1818                                           const Handle(Adaptor3d_HSurface)&    Surf2,
1819                                           const Handle(Adaptor3d_TopolTool)& D2,
1820                                           const Standard_Real   U1Depart,
1821                                           const Standard_Real   V1Depart,
1822                                           const Standard_Real   U2Depart,
1823                                           const Standard_Real   V2Depart,
1824                                           const Standard_Real   TolTangency,
1825                                           const Standard_Real   Epsilon,
1826                                           const Standard_Real   Deflection,
1827                                           const Standard_Real   Increment)
1828 {
1829   //    Standard_Integer NbU1 = D1->NbSamplesU();
1830   //    Standard_Integer NbV1 = D1->NbSamplesV();
1831   //    Standard_Integer NbU2 = D2->NbSamplesU();
1832   //    Standard_Integer NbV2 = D2->NbSamplesV();
1833
1834   //-- Traitement des Lignes de sections
1835   empt = Standard_True;
1836   done = Standard_True;
1837   SLin.Clear();
1838
1839   //------------------------------------------------------------
1840
1841   Standard_Real pu1,pu2,pv1,pv2;
1842
1843   TColStd_Array1OfReal StartParams(1,4);
1844
1845   //    Standard_Integer MaxOscill = NbU1;
1846   //    if(MaxOscill < NbU2) MaxOscill=NbU2;
1847   //    if(MaxOscill < NbV1) MaxOscill=NbV1;
1848   //    if(MaxOscill < NbV2) MaxOscill=NbV2;
1849
1850   //    Standard_Real nIncrement=Increment;
1851   //    if(MaxOscill>10) {
1852   //  #ifdef OCCT_DEBUG
1853   //      cout<<"\n IntPatch_PrmPrmIntersection.gxx : Increment:"<<Increment<<" -> "<<Increment/(0.5*MaxOscill)<<endl;
1854   //  #endif
1855   //      nIncrement/=0.5*MaxOscill;
1856   //    }
1857
1858   IntWalk_PWalking PW(Surf1,Surf2,
1859     TolTangency,
1860     Epsilon,
1861     Deflection,
1862     Increment); //nIncrement);
1863
1864
1865   //Standard_Real    SeuildPointLigne = 15.0 * Increment * Increment; //-- 10 est insuffisant
1866   //Standard_Real    incidence;
1867   //Standard_Real    dminiPointLigne;
1868
1869   Standard_Boolean HasStartPoint;//,RejetLigne;
1870
1871   IntSurf_PntOn2S StartPOn2S;
1872
1873   //Standard_Integer ver;
1874
1875   gp_Pnt Point3dDebut,Point3dFin;
1876
1877   //------------------------------------------------------------
1878
1879   StartParams(1) = U1Depart;
1880   StartParams(2) = V1Depart;
1881   StartParams(3) = U2Depart;
1882   StartParams(4) = V2Depart;
1883
1884   //-----------------------------------------------------------------------
1885   //-- Calcul du premier point de cheminement a partir du point approche --
1886   //-----------------------------------------------------------------------
1887   HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
1888   if(HasStartPoint) {
1889     //-------------------------------------------------
1890     //-- Un point a ete trouve                       --
1891     //-- On verifie qu il n appartient pas           --
1892     //--  a une ligne de cheminement deja calculee.  --
1893     //-------------------------------------------------
1894
1895     PW.Perform(StartParams);
1896     if(PW.IsDone()) {
1897
1898       Point3dDebut = PW.Value(1).Value();
1899       Point3dFin   = PW.Value(PW.NbPoints()).Value();
1900
1901       IntSurf_TypeTrans trans1,trans2;
1902       Standard_Real locu,locv;
1903       gp_Vec norm1,norm2,d1u,d1v;
1904       gp_Pnt ptbid;
1905       Standard_Integer indextg;
1906       gp_Vec tgline(PW.TangentAtLine(indextg));
1907       PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
1908       Surf1->D1(locu,locv,ptbid,d1u,d1v);
1909       norm1 = d1u.Crossed(d1v);
1910       PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
1911       Surf2->D1(locu,locv,ptbid,d1u,d1v);
1912       norm2 = d1u.Crossed(d1v);
1913       if (tgline.DotCross(norm2,norm1)>0.) {
1914         trans1 = IntSurf_Out;
1915         trans2 = IntSurf_In;
1916       }
1917       else {
1918         trans1 = IntSurf_In;
1919         trans2 = IntSurf_Out;
1920       }
1921
1922
1923
1924       Standard_Real TolTang = TolTangency;
1925       Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
1926       IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
1927       IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
1928
1929       //---------------
1930       if(wline->NbVertex() == 0) {
1931         IntPatch_Point vtx;
1932         IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
1933         POn2S.Parameters(pu1,pv1,pu2,pv2);
1934         vtx.SetValue(Point3dDebut,TolTang,Standard_False);
1935         vtx.SetParameters(pu1,pv1,pu2,pv2);
1936         vtx.SetParameter(1);
1937         wline->AddVertex(vtx);
1938
1939         POn2S = PW.Line()->Value(wline->NbPnts());
1940         POn2S.Parameters(pu1,pv1,pu2,pv2);
1941         vtx.SetValue(Point3dFin,TolTang,Standard_False);
1942         vtx.SetParameters(pu1,pv1,pu2,pv2);
1943         vtx.SetParameter(wline->NbPnts());
1944         wline->AddVertex(vtx);
1945       }
1946
1947       //---------------
1948       SLin.Append(wline);
1949       empt = Standard_False;
1950
1951     }
1952   }
1953 }
1954 //==================================================================================
1955 // function : AdjustOnPeriodic
1956 // purpose  :
1957 //==================================================================================
1958 void AdjustOnPeriodic(const Handle(Adaptor3d_HSurface)& Surf1,
1959                       const Handle(Adaptor3d_HSurface)& Surf2,
1960                       IntPatch_SequenceOfLine& aSLin)
1961 {
1962   Standard_Boolean bIsPeriodic[4], bModified, bIsNull, bIsPeriod;
1963   Standard_Integer i, j, k, aNbLines, aNbPx, aIndx, aIndq;
1964   Standard_Real aPeriod[4], dPeriod[4], ux[4], uq[4], aEps, du;
1965   //
1966   aEps=Precision::Confusion();
1967   //
1968   for (k=0; k<4; ++k) {
1969     aPeriod[k]=0.;
1970   }
1971   //
1972   bIsPeriodic[0]=Surf1->IsUPeriodic();
1973   bIsPeriodic[1]=Surf1->IsVPeriodic();
1974   bIsPeriodic[2]=Surf2->IsUPeriodic();
1975   bIsPeriodic[3]=Surf2->IsVPeriodic();
1976   //
1977   if (bIsPeriodic[0]){
1978     aPeriod[0]=Surf1->UPeriod();
1979   }
1980   if (bIsPeriodic[1]){
1981     aPeriod[1]=Surf1->VPeriod();
1982   }
1983   if (bIsPeriodic[2]){
1984     aPeriod[2]=Surf2->UPeriod();
1985   }
1986   if (bIsPeriodic[3]){
1987     aPeriod[3]=Surf2->VPeriod();
1988   }
1989   //
1990   for (k=0; k<4; ++k) {
1991     dPeriod[k]=0.25*aPeriod[k];
1992   }
1993   //
1994   aNbLines=aSLin.Length();
1995   for (i=1; i<=aNbLines; ++i) {
1996     Handle(IntPatch_WLine) aIL=Handle(IntPatch_WLine)::DownCast(aSLin.Value(i));
1997     Handle(IntSurf_LineOn2S) aL=aIL->Curve();
1998
1999     aNbPx=aL->NbPoints();
2000     if (aNbPx<10) {
2001       continue;
2002     }
2003     //
2004     for (j=0; j<2; ++j) {
2005       bModified=Standard_False;
2006       aIndx=1;
2007       aIndq=2;
2008       if (j) {
2009         aIndx=aNbPx;
2010         aIndq=aNbPx-1;
2011       }
2012       //
2013       const IntSurf_PntOn2S& aPSx=aL->Value(aIndx);
2014       const IntSurf_PntOn2S& aPSq=aL->Value(aIndq);
2015       //
2016       aPSx.Parameters(ux[0], ux[1], ux[2], ux[3]);
2017       aPSq.Parameters(uq[0], uq[1], uq[2], uq[3]);
2018       //
2019       for (k=0; k<4; ++k) {
2020         bIsNull=Standard_False;
2021         bIsPeriod=Standard_False;
2022         //
2023         if (!bIsPeriodic[k]) {
2024           continue;
2025         }
2026         //
2027         if (fabs(ux[k])<aEps) {
2028           bModified=Standard_True;
2029           bIsNull=Standard_True;
2030         }
2031         //
2032         else if (fabs(ux[k]-aPeriod[k])<aEps) {
2033           bModified=Standard_True;
2034           bIsPeriod=Standard_True;
2035         }
2036         //
2037         if (bModified) {
2038           du=fabs(ux[k]-uq[k]);
2039           if (du > dPeriod[k]) {
2040             if(bIsNull){
2041               ux[k]=aPeriod[k];
2042             }
2043             if(bIsPeriod) {
2044               ux[k]=0.;
2045             }
2046           }
2047         }
2048       }//for (k=0; k<4; ++k)
2049       if (bModified) {
2050         IntSurf_PntOn2S aPntOn2S;
2051         //
2052         aPntOn2S=aPSx;
2053         aPntOn2S.SetValue(ux[0], ux[1], ux[2], ux[3]);
2054         aL->Value(aIndx, aPntOn2S);
2055       }
2056     }//for (j=0; j<1; ++j) {
2057   }//for (i=1; i<=aNbLines; ++i)
2058 }
2059
2060 //==================================================================================
2061 // function : MakeNewPoint
2062 // purpose  :
2063 //==================================================================================
2064 IntSurf_PntOn2S MakeNewPoint(const IntSurf_PntOn2S& replacePnt,
2065                              const IntSurf_PntOn2S& oldPnt,
2066                              const Standard_Real* Periods)
2067 {
2068   IntSurf_PntOn2S NewPoint;
2069   NewPoint.SetValue(replacePnt.Value());
2070
2071   Standard_Real OldParams[4], NewParams[4];
2072   oldPnt.Parameters(OldParams[0], OldParams[1], OldParams[2], OldParams[3]);
2073   replacePnt.Parameters(NewParams[0], NewParams[1], NewParams[2], NewParams[3]);
2074
2075   Standard_Integer i;
2076   for (i = 0; i < 4; i++)
2077     if (Periods[i] != 0.)
2078     {
2079       if (Abs(NewParams[i] - OldParams[i]) >= 0.5*Periods[i])
2080       {
2081         if (NewParams[i] < OldParams[i])
2082           NewParams[i] += Periods[i];
2083         else
2084           NewParams[i] -= Periods[i];
2085       }
2086     }
2087
2088     NewPoint.SetValue(NewParams[0], NewParams[1], NewParams[2], NewParams[3]);
2089     return NewPoint;
2090 }
2091
2092 //==================================================================================
2093 // function : Perform
2094 // purpose  : base SS Int. function
2095 //==================================================================================
2096 void IntPatch_PrmPrmIntersection::Perform (const Handle(Adaptor3d_HSurface)& Surf1,
2097                                            const Handle(Adaptor3d_TopolTool)& D1,
2098                                            const Handle(Adaptor3d_HSurface)& Surf2,
2099                                            const Handle(Adaptor3d_TopolTool)& D2,
2100                                            const Standard_Real   TolTangency,
2101                                            const Standard_Real   Epsilon,
2102                                            const Standard_Real   Deflection,
2103                                            const Standard_Real   Increment,
2104                                            const Standard_Boolean ClearFlag)
2105 {
2106   Standard_Integer Limit = 2500;
2107   Standard_Integer NbU1 = 10, NbV1 = 10, NbU2 = 10, NbV2 = 10;
2108   //
2109   D1->SamplePnts(Deflection, NbU1, NbV1);
2110   D2->SamplePnts(Deflection, NbU2, NbV2);
2111   //
2112   NbU1 = D1->NbSamplesU();
2113   NbV1 = D1->NbSamplesV();
2114   NbU2 = D2->NbSamplesU();
2115   NbV2 = D2->NbSamplesV();
2116
2117   TColStd_Array1OfReal anUpars1(1, NbU1), aVpars1(1, NbV1);
2118   TColStd_Array1OfReal anUpars2(1, NbU2), aVpars2(1, NbV2);
2119   //
2120   D1->UParameters(anUpars1);
2121   D1->VParameters(aVpars1);
2122   D2->UParameters(anUpars2);
2123   D2->VParameters(aVpars2);
2124
2125   Standard_Real Periods [4];
2126   Periods[0] = (Surf1->IsUPeriodic())? Surf1->UPeriod() : 0.;
2127   Periods[1] = (Surf1->IsVPeriodic())? Surf1->VPeriod() : 0.;
2128   Periods[2] = (Surf2->IsUPeriodic())? Surf2->UPeriod() : 0.;
2129   Periods[3] = (Surf2->IsVPeriodic())? Surf2->VPeriod() : 0.;
2130
2131   //---------------------------------------------
2132   if((NbU1*NbV1<=Limit && NbV2*NbU2<=Limit))
2133   {
2134     empt = Standard_True;
2135     if (ClearFlag)
2136     {
2137       SLin.Clear();
2138     }
2139     //
2140     IntPolyh_Intersection* pInterference = NULL;
2141
2142     if ( D1->IsUniformSampling() || D2->IsUniformSampling() )
2143     {
2144       pInterference = new IntPolyh_Intersection(Surf1,NbU1,NbV1,Surf2,NbU2,NbV2);
2145     }
2146     else
2147     {
2148       pInterference = new IntPolyh_Intersection(Surf1, anUpars1, aVpars1,
2149         Surf2, anUpars2, aVpars2 );
2150     }
2151
2152     if ( !pInterference )
2153     {
2154       done = Standard_False;
2155       return;
2156     }
2157     //
2158     IntPolyh_Intersection& Interference = *pInterference;
2159     //
2160     done = Interference.IsDone();
2161     if( !done )
2162     {
2163       if (pInterference)
2164       {
2165         delete pInterference;
2166         pInterference = NULL;
2167       }
2168
2169       return;
2170     }
2171
2172     Standard_Integer nbLigSec = Interference.NbSectionLines();
2173     Standard_Integer nbTanZon = Interference.NbTangentZones();
2174     Standard_Real SeuildPointLigne = 15.0 * Increment * Increment;
2175
2176     Standard_Integer NbLigCalculee = 0, ver;
2177     Standard_Real pu1,pu2,pv1,pv2, incidence, dminiPointLigne;
2178     Standard_Boolean HasStartPoint = Standard_False, RejectLine = Standard_False;
2179     IntSurf_PntOn2S StartPOn2S;
2180     gp_Pnt Point3dDebut,Point3dFin;
2181
2182     TColStd_Array1OfReal StartParams(1,4);
2183     IntWalk_PWalking PW(Surf1,Surf2,TolTangency,Epsilon,Deflection,Increment);
2184
2185     if(nbLigSec>=1)
2186     {
2187       Standard_Integer *TabL = new Standard_Integer [nbLigSec+1];
2188       for(Standard_Integer ls=1; ls<=nbLigSec; ++ls)
2189       {
2190         TabL[ls]=ls;
2191       }
2192       //----------------------------------------1.1
2193       {
2194         Standard_Boolean triok;
2195         Standard_Integer nb_A, nb_B, tyu;
2196         do
2197         {
2198           triok=Standard_True;
2199           for(Standard_Integer b = 2; b <= nbLigSec; ++b )
2200           {
2201             nb_B = Interference.NbPointsInLine(TabL[b]);
2202             nb_A = Interference.NbPointsInLine(TabL[b-1]);
2203
2204             if( nb_B > nb_A )
2205             {
2206               tyu=TabL[b];
2207               TabL[b]=TabL[b-1];
2208               TabL[b-1]=tyu;
2209               triok=Standard_False;
2210             }
2211           }
2212         }
2213         while(triok==Standard_False);
2214       }
2215
2216       //----------------------------------------
2217       // 1.2 For the line "ls" get 2D-bounds U,V for surfaces 1,2
2218       //
2219       for(Standard_Integer ls = 1; ls <= nbLigSec; ++ls)
2220       {
2221         Standard_Integer nbp = Interference.NbPointsInLine(TabL[ls]);
2222         if (!nbp)
2223         {
2224           continue;
2225         }
2226         //
2227         Standard_Integer *TabPtDep = new Standard_Integer [nbp+1];
2228         for(Standard_Integer ilig = 1; ilig <= nbp; ++ilig )
2229         {
2230           TabPtDep[ilig]=0;
2231         }
2232         //
2233         Standard_Real UminLig1,VminLig1,UmaxLig1,VmaxLig1;
2234         Standard_Real UminLig2,VminLig2,UmaxLig2,VmaxLig2;
2235         Standard_Real _x,_y,_z;
2236         //
2237         Interference.GetLinePoint(TabL[ls], 1, _x, _y, _z,
2238           UminLig1, VminLig1, UminLig2, VminLig2,
2239           incidence);
2240
2241         UmaxLig1=UminLig1;
2242         VmaxLig1=VminLig1;
2243         UmaxLig2=UminLig2;
2244         VmaxLig2=VminLig2;
2245         //
2246         for(Standard_Integer ilig = 2; ilig <= nbp; ilig++ )
2247         {
2248           Standard_Real U1, U2, V1, V2;
2249           Interference.GetLinePoint(TabL[ls],ilig,_x,_y,_z,U1,V1,U2,V2,incidence);
2250           //
2251           if(U1>UmaxLig1) UmaxLig1=U1;
2252           if(V1>VmaxLig1) VmaxLig1=V1;
2253           if(U2>UmaxLig2) UmaxLig2=U2;
2254           if(V2>VmaxLig2) VmaxLig2=V2;
2255           //
2256           if(U1<UminLig1) UminLig1=U1;
2257           if(V1<VminLig1) VminLig1=V1;
2258           if(U2<UminLig2) UminLig2=U2;
2259           if(V2<VminLig2) VminLig2=V2;
2260         }//for( ilig = 2; ilig <= nbp; ilig++ ) {
2261         //
2262         //----------------------------------------
2263         // 1.3
2264         Standard_Integer nbps2 = (nbp>3)? (nbp/2) :  1;
2265         Standard_Integer NombreDePointsDeDepartDuCheminement = 0;
2266         Standard_Boolean lignetrouvee=Standard_False;
2267         const Standard_Integer NbDePointsDeDepartDuChmLimit = 5;
2268         //
2269         do
2270         {
2271           NombreDePointsDeDepartDuCheminement++;
2272           switch (NombreDePointsDeDepartDuCheminement)
2273           {
2274           case 1:
2275             nbps2 = (nbp > 1) ? nbp/2 : 1;
2276             if(nbp<3)
2277               NombreDePointsDeDepartDuCheminement = NbDePointsDeDepartDuChmLimit;
2278
2279             break;
2280           case 2:
2281             nbps2 = 1;
2282             break;
2283           case 3:
2284             nbps2 = nbp-1;
2285             break;
2286
2287           case 4:
2288             nbps2 = 3 * nbp / 4;
2289             break;
2290
2291           case 5:
2292             nbps2 = nbp / 4;
2293             break;
2294           default:
2295             nbps2 = NombreDePointsDeDepartDuCheminement-3;
2296             NombreDePointsDeDepartDuCheminement++;
2297           }
2298
2299           //
2300           if(TabPtDep[nbps2] == 0)
2301           {
2302             Standard_Real U1, U2, V1, V2;
2303
2304             TabPtDep[nbps2] = 1;
2305             Interference.GetLinePoint(TabL[ls],nbps2,_x,_y,_z,U1,V1,U2,V2,incidence);
2306
2307             StartParams(1) = U1;
2308             StartParams(2) = V1;
2309             StartParams(3) = U2;
2310             StartParams(4) = V2;
2311
2312             HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
2313             dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
2314             if(HasStartPoint)
2315             {
2316               StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
2317               NbLigCalculee = SLin.Length();
2318               Standard_Integer l;
2319               for( l = 1; (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne); l++)
2320               {
2321                 const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
2322
2323                 if (IsPointOnLine(StartPOn2S, testwline, Deflection))
2324                 {
2325                   dminiPointLigne = 0.0;
2326                 }
2327               }// for( l ...
2328
2329               if(dminiPointLigne > SeuildPointLigne)
2330               {
2331                 PW.Perform(StartParams, UminLig1, VminLig1, UminLig2, VminLig2,
2332                   UmaxLig1, VmaxLig1, UmaxLig2, VmaxLig2);
2333
2334                 //
2335                 Standard_Boolean bPWIsDone;
2336                 Standard_Integer iPWNbPoints, aNbPointsVer;
2337                 Standard_Real aD11, aD12, aD21, aD22, aDx;
2338                 //
2339                 bPWIsDone=PW.IsDone();
2340
2341                 if(bPWIsDone)
2342                 {
2343                   iPWNbPoints=PW.NbPoints();
2344                   //
2345                   if( iPWNbPoints > 2 )
2346                   {
2347                     //Try to extend the intersection line to boundary, if it is possibly
2348                     PW.PutToBoundary(Surf1, Surf2);
2349
2350                     const Standard_Integer aMinNbPoints = 40;
2351                     if(iPWNbPoints < aMinNbPoints)
2352                     {
2353                       PW.SeekAdditionalPoints(Surf1, Surf2, aMinNbPoints);
2354                       iPWNbPoints = PW.NbPoints();
2355                     }
2356
2357                     RejectLine = Standard_False;
2358                     Point3dDebut = PW.Value(1).Value();
2359                     Point3dFin   = PW.Value(iPWNbPoints).Value();
2360                     for( ver = 1; (!RejectLine) && (ver<= NbLigCalculee); ++ver)
2361                     {
2362                       const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
2363                       //
2364                       aNbPointsVer=verwline->NbPnts();
2365                       if (aNbPointsVer<3)
2366                       {
2367                         continue;
2368                       }
2369                       //
2370                       const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
2371                       const IntSurf_PntOn2S& verPointFin = verwline->Point(verwline->NbPnts());
2372                       //xf
2373                       const gp_Pnt& aP21=verPointDebut.Value();
2374                       const gp_Pnt& aP22=verPointFin.Value();
2375                       //
2376                       aD11=Point3dDebut.Distance(aP21);
2377                       aD12=Point3dDebut.Distance(aP22);
2378                       aD21=Point3dFin.Distance(aP21);
2379                       aD22=Point3dFin.Distance(aP22);
2380                       //
2381                       if((aD11<=TolTangency && aD22<=TolTangency) ||
2382                         (aD12<=TolTangency && aD21<=TolTangency))
2383                       {
2384                         Standard_Integer m, mx;
2385                         //
2386                         mx=aNbPointsVer/2;
2387                         if (aNbPointsVer%2)
2388                         {
2389                           ++mx;
2390                         }
2391                         //
2392                         const gp_Pnt& aPx=verwline->Point(mx).Value();
2393                         for(m=1; m<iPWNbPoints; ++m)
2394                         {
2395                           const gp_Pnt& aP1=PW.Value(m).Value();
2396                           const gp_Pnt& aP2=PW.Value(m+1).Value();
2397                           gp_Vec aVec12(aP1, aP2);
2398                           if (aVec12.SquareMagnitude()<1.e-20)
2399                           {
2400                             continue;
2401                           }
2402
2403                           //
2404                           gp_Dir aDir12(aVec12);
2405                           gp_Lin aLin12(aP1, aDir12);
2406                           aDx=aLin12.Distance(aPx);
2407
2408                           //modified by NIZNHY-PKV Tue May 10 11:08:07 2011f
2409                           if (aDx<=2.*Epsilon)
2410                           {
2411                             //if (aDx<=TolTangency) {
2412                             //modified by NIZNHY-PKV Tue May 10 11:08:13 2011t
2413
2414                             RejectLine = Standard_True;
2415                             ver--;
2416                             break;
2417                           }
2418                         }//for(m=1; m<iPWNbPoints; ++m){
2419                       }//if((aD11<=TolTangency && aD22<=TolTangency) ||...
2420                     }// for( ver = 1 ; (!RejetLigne) && (ver<= NbLigCalculee) ; ver++) {
2421                     //
2422
2423                     if(RejectLine)
2424                     {
2425                       DublicateOfLinesProcessing(PW, ver, SLin, RejectLine);
2426                     }
2427
2428                     if(!RejectLine)
2429                     {
2430                       IntSurf_TypeTrans trans1,trans2;
2431                       Standard_Real locu,locv;
2432                       gp_Vec norm1,norm2,d1u,d1v;
2433                       gp_Pnt ptbid;
2434                       Standard_Integer indextg;
2435                       gp_Vec tgline(PW.TangentAtLine(indextg));
2436                       PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
2437                       Surf1->D1(locu,locv,ptbid,d1u,d1v);
2438                       norm1 = d1u.Crossed(d1v);
2439                       PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
2440                       Surf2->D1(locu,locv,ptbid,d1u,d1v);
2441                       norm2 = d1u.Crossed(d1v);
2442                       if( tgline.DotCross(norm2,norm1) >= 0. )
2443                       {
2444                         trans1 = IntSurf_Out;
2445                         trans2 = IntSurf_In;
2446                       }
2447                       else
2448                       {
2449                         trans1 = IntSurf_In;
2450                         trans2 = IntSurf_Out;
2451                       }
2452
2453                       Standard_Real TolTang = TolTangency;
2454                       Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
2455                       IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
2456                       IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
2457                       if(wline->NbVertex() == 0)
2458                       {
2459                         IntPatch_Point vtx;
2460                         IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
2461                         POn2S.Parameters(pu1,pv1,pu2,pv2);
2462                         vtx.SetValue(Point3dDebut,TolTang,Standard_False);
2463                         vtx.SetParameters(pu1,pv1,pu2,pv2);
2464                         vtx.SetParameter(1);
2465                         wline->AddVertex(vtx);
2466
2467                         POn2S = PW.Line()->Value(wline->NbPnts());
2468                         POn2S.Parameters(pu1,pv1,pu2,pv2);
2469                         vtx.SetValue(Point3dFin,TolTang,Standard_False);
2470                         vtx.SetParameters(pu1,pv1,pu2,pv2);
2471                         vtx.SetParameter(wline->NbPnts());
2472                         wline->AddVertex(vtx);
2473                       }
2474
2475                       lignetrouvee = Standard_True;
2476
2477                       SeveralWlinesProcessing(Surf1, Surf2, SLin, Periods, trans1, trans2,
2478                                               TolTang, Max(PW.MaxStep(0), PW.MaxStep(1)),
2479                                               Max(PW.MaxStep(2), PW.MaxStep(3)), wline);
2480
2481                       AddWLine(SLin, wline, Deflection);
2482                       empt = Standard_False;
2483                     }// !RejetLigne
2484                   }// PW points > 2
2485                 }// done is True
2486               }// dminiPointLigne > SeuildPointLigne
2487             }// HasStartPoint
2488           }// if TabPtDep[nbps2] == 0
2489         } while(nbp>5 && !( (NombreDePointsDeDepartDuCheminement >= NbDePointsDeDepartDuChmLimit && lignetrouvee) ||
2490           (NombreDePointsDeDepartDuCheminement-3 >= nbp && (!lignetrouvee))));
2491         delete [] TabPtDep;
2492       }// for( ls ...
2493
2494       delete [] TabL;
2495
2496     }// if nbLigSec >= 1
2497     //
2498     AdjustOnPeriodic(Surf1, Surf2, SLin);
2499     //
2500
2501     //--------------------------------------------------------------------
2502     //-- Calcul des parametres approches a partir des Zones De Tangence --
2503     //--------------------------------------------------------------------
2504     Standard_Real UminLig1,VminLig1,UmaxLig1,VmaxLig1;
2505     Standard_Real UminLig2,VminLig2,UmaxLig2,VmaxLig2;
2506
2507     UminLig1=VminLig1=UminLig2=VminLig2=RealLast();
2508     UmaxLig1=VmaxLig1=UmaxLig2=VmaxLig2=-UminLig1;
2509
2510     // NbPointsInTangentZone always == 1 (eap)
2511
2512     Standard_Integer z;
2513     for( z=1; z <= nbTanZon; z++)
2514     {
2515       //Standard_Integer NbPointsInTangentZone=Interference.NbPointsInTangentZone(z);
2516       //for(Standard_Integer pz=1; pz<=NbPointsInTangentZone; pz++) {
2517       Standard_Integer pz=1;
2518       Standard_Real _x,_y,_z;
2519       Standard_Real U1, U2, V1, V2;
2520       Interference.GetTangentZonePoint(z,pz,_x,_y,_z,U1,V1,U2,V2);
2521
2522       if(U1>UmaxLig1) UmaxLig1=U1;
2523       if(V1>VmaxLig1) VmaxLig1=V1;
2524       if(U2>UmaxLig2) UmaxLig2=U2;
2525       if(V2>VmaxLig2) VmaxLig2=V2;
2526
2527       if(U1<UminLig1) UminLig1=U1;
2528       if(V1<VminLig1) VminLig1=V1;
2529       if(U2<UminLig2) UminLig2=U2;
2530       if(V2<VminLig2) VminLig2=V2;
2531       //}
2532     }
2533
2534     for(z=1; z <= nbTanZon; z++)
2535     {
2536       //Standard_Integer NbPointsInTangentZone=Interference.NbPointsInTangentZone(z);
2537       //for(Standard_Integer pz=1; pz<=NbPointsInTangentZone; pz++) {
2538       Standard_Integer pz=1;
2539       Standard_Real _x,_y,_z;
2540       Standard_Real U1, U2, V1, V2;
2541       Interference.GetTangentZonePoint(z,pz,_x,_y,_z,U1,V1,U2,V2);
2542
2543       StartParams(1) = U1;
2544       StartParams(2) = V1;
2545       StartParams(3) = U2;
2546       StartParams(4) = V2;
2547
2548       //-----------------------------------------------------------------------
2549       //-- Calcul du premier point de cheminement a partir du point approche --
2550       //-----------------------------------------------------------------------
2551       HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
2552       if(HasStartPoint)
2553       {
2554         //-------------------------------------------------
2555         //-- Un point a ete trouve                       --
2556         //-- On verifie qu il n appartient pas           --
2557         //--  a une ligne de cheminement deja calculee.  --
2558         //-------------------------------------------------
2559         StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
2560
2561         NbLigCalculee = SLin.Length();
2562         dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
2563
2564         for(Standard_Integer l=1;
2565           (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne);
2566           l++)
2567         {
2568           const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
2569
2570           if (IsPointOnLine(StartPOn2S, testwline, Deflection))
2571           {
2572             dminiPointLigne = 0.0;
2573           }
2574         }
2575
2576         //-- Fin d exploration des lignes
2577         if(dminiPointLigne > SeuildPointLigne)
2578         {
2579           //---------------------------------------------------
2580           //-- Le point de depart du nouveau cheminement     --
2581           //-- n est present dans aucune ligne deja calculee.--
2582           //---------------------------------------------------
2583           PW.Perform(StartParams,UminLig1,VminLig1,UminLig2,VminLig2,
2584             UmaxLig1,VmaxLig1,UmaxLig2,VmaxLig2);
2585
2586           if(PW.IsDone())
2587           {
2588             if(PW.NbPoints()>2)
2589             {
2590               const Standard_Integer aMinNbPoints = 40;
2591               if(PW.NbPoints() < aMinNbPoints)
2592               {
2593                 PW.SeekAdditionalPoints(Surf1, Surf2, aMinNbPoints);
2594               }
2595
2596               //-----------------------------------------------
2597               //-- Verification a posteriori :
2598               //-- On teste si le point de depart et de fin de
2599               //-- la ligne de cheminement est present dans une
2600               //-- autre ligne .
2601               //-----------------------------------------------
2602               RejectLine = Standard_False;
2603               Point3dDebut = PW.Value(1).Value();
2604               const IntSurf_PntOn2S& PointFin = PW.Value(PW.NbPoints());
2605               Point3dFin   = PointFin.Value();
2606
2607               for(ver=1 ; (!RejectLine) && (ver<= NbLigCalculee) ; ver++)
2608               {
2609                 const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
2610                 //-- Handle(IntPatch_WLine) verwline=Handle(IntPatch_WLine)::DownCast(SLin.Value(ver));
2611
2612                 // Check end point if it is on existing line.
2613                 // Start point is checked before.
2614                 if (IsPointOnLine(PointFin, verwline, Deflection))
2615                 {
2616                   RejectLine = Standard_True;
2617                   break;
2618                 }
2619
2620                 const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
2621                 const IntSurf_PntOn2S& verPointFin   = verwline->Point(verwline->NbPnts());
2622                 if(Point3dDebut.Distance(verPointDebut.Value()) < TolTangency)
2623                 {
2624                   RejectLine = Standard_True;
2625                 }
2626                 else
2627                 {
2628                   if(Point3dFin.Distance(verPointFin.Value()) < TolTangency)
2629                   {
2630                     RejectLine = Standard_True;
2631                   }
2632                 }
2633               }
2634
2635               if(!RejectLine)
2636               {
2637                 IntSurf_TypeTrans trans1,trans2;
2638                 Standard_Real locu,locv;
2639                 gp_Vec norm1,norm2,d1u,d1v;
2640                 gp_Pnt ptbid;
2641                 Standard_Integer indextg;
2642                 gp_Vec tgline(PW.TangentAtLine(indextg));
2643                 PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
2644                 Surf1->D1(locu,locv,ptbid,d1u,d1v);
2645                 norm1 = d1u.Crossed(d1v);
2646                 PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
2647                 Surf2->D1(locu,locv,ptbid,d1u,d1v);
2648                 norm2 = d1u.Crossed(d1v);
2649                 if (tgline.DotCross(norm2,norm1)>0.)
2650                 {
2651                   trans1 = IntSurf_Out;
2652                   trans2 = IntSurf_In;
2653                 }
2654                 else
2655                 {
2656                   trans1 = IntSurf_In;
2657                   trans2 = IntSurf_Out;
2658                 }
2659
2660                 Standard_Real TolTang = TolTangency;
2661                 Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
2662                 IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
2663                 IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
2664
2665                 //---------------
2666                 if(wline->NbVertex() == 0)
2667                 {
2668                   IntPatch_Point vtx;
2669                   IntSurf_PntOn2S POn2S = PW.Line()->Value(1);
2670                   POn2S.Parameters(pu1,pv1,pu2,pv2);
2671                   vtx.SetValue(Point3dDebut,TolTang,Standard_False);
2672                   vtx.SetParameters(pu1,pv1,pu2,pv2);
2673                   vtx.SetParameter(1);
2674                   wline->AddVertex(vtx);
2675
2676                   POn2S = PW.Line()->Value(wline->NbPnts());
2677                   POn2S.Parameters(pu1,pv1,pu2,pv2);
2678                   vtx.SetValue(Point3dFin,TolTang,Standard_False);
2679                   vtx.SetParameters(pu1,pv1,pu2,pv2);
2680                   vtx.SetParameter(wline->NbPnts());
2681                   wline->AddVertex(vtx);
2682                 }
2683
2684                 //---------------
2685                 AddWLine(SLin, wline, Deflection);
2686                 empt = Standard_False;
2687               }
2688               else
2689               {
2690                 //-- cout<<" ----- REJET DE LIGNE (POINT DE DEPART) ----- "<<endl;
2691               }
2692               //------------------------------------------------------------
2693             }
2694           }  //--  le cheminement a reussi (done a True)
2695         }  //--  le point approche ne renvoie pas sur une ligne existante
2696       } //-- Si HasStartPoint
2697       //} //-- Boucle Sur les Points de la Tangent Zone
2698     } //-- Boucle sur Les Tangent Zones
2699
2700     if ( pInterference )
2701     {
2702       delete pInterference;
2703       pInterference = NULL;
2704     }
2705
2706     return;
2707   }// if((NbU1*NbV1<=Limit && NbV2*NbU2<=Limit)) {
2708
2709   Handle(IntSurf_LineOn2S) LOn2S = new IntSurf_LineOn2S();
2710   PointDepart( LOn2S, Surf1, NbU1, NbV1, Surf2, NbU2, NbV2 );
2711   empt = Standard_True;
2712   done = Standard_True;
2713
2714   Standard_Integer NbLigCalculee = 0;
2715   Standard_Real U1,U2,V1,V2;
2716   Standard_Real pu1,pu2,pv1,pv2;
2717
2718   TColStd_Array1OfReal StartParams(1,4);
2719   Standard_Integer MaxOscill = NbU1;
2720   if(MaxOscill < NbU2) MaxOscill=NbU2;
2721   if(MaxOscill < NbV1) MaxOscill=NbV1;
2722   if(MaxOscill < NbV2) MaxOscill=NbV2;
2723
2724   Standard_Real nIncrement=Increment;
2725   //if(MaxOscill>10)
2726   //nIncrement/=0.5*MaxOscill;
2727
2728   IntWalk_PWalking PW(Surf1,Surf2,TolTangency,Epsilon,Deflection,nIncrement);
2729   Standard_Real    SeuildPointLigne = 15.0 * Increment * Increment; //-- 10 est insuffisant
2730   Standard_Real    dminiPointLigne;
2731   Standard_Boolean HasStartPoint,RejetLigne;
2732   IntSurf_PntOn2S StartPOn2S;
2733   Standard_Integer ver;
2734   gp_Pnt Point3dDebut,Point3dFin;
2735
2736   //------------------------------------------------------------
2737   //-- Calcul des parametres approches a partir des Zones De Tangence --
2738   //--------------------------------------------------------------------
2739   Standard_Integer nbTanZon = LOn2S->NbPoints();
2740   for(Standard_Integer z=1; z <= nbTanZon; z++) {
2741     const IntSurf_PntOn2S& POn2S = LOn2S->Value(z);
2742     POn2S.Parameters(U1,V1,U2,V2);
2743     StartParams(1) = U1;
2744     StartParams(2) = V1;
2745     StartParams(3) = U2;
2746     StartParams(4) = V2;
2747
2748     //-----------------------------------------------------------------------
2749     //-- Calcul du premier point de cheminement a partir du point approche --
2750     //-----------------------------------------------------------------------
2751     HasStartPoint = PW.PerformFirstPoint(StartParams,StartPOn2S);
2752     if(HasStartPoint)
2753     {
2754       //-------------------------------------------------
2755       //-- Un point a ete trouve                       --
2756       //-- On verifie qu il n appartient pas           --
2757       //--  a une ligne de cheminement deja calculee.  --
2758       //-------------------------------------------------
2759       StartPOn2S.Parameters(pu1,pv1,pu2,pv2);
2760
2761       NbLigCalculee = SLin.Length();
2762       dminiPointLigne = SeuildPointLigne + SeuildPointLigne;
2763
2764       for(Standard_Integer l=1;
2765         (l <= NbLigCalculee) && (dminiPointLigne >= SeuildPointLigne);
2766         l++)
2767       {
2768         const Handle(IntPatch_WLine)& testwline = *((Handle(IntPatch_WLine)*)&SLin.Value(l));
2769
2770         if (IsPointOnLine(StartPOn2S, testwline, Deflection))
2771         {
2772           dminiPointLigne = 0.0;
2773         }
2774       }
2775
2776       //-- Fin d exploration des lignes
2777       if(dminiPointLigne > SeuildPointLigne)
2778       {
2779         //---------------------------------------------------
2780         //-- Le point de depart du nouveau cheminement     --
2781         //-- n est present dans aucune ligne deja calculee.--
2782         //---------------------------------------------------
2783         PW.Perform(StartParams);
2784         if(PW.IsDone())
2785         {
2786           if(PW.NbPoints()>2)
2787           {
2788             //-----------------------------------------------
2789             //-- Verification a posteriori :
2790             //-- On teste si le point de depart et de fin de
2791             //-- la ligne de cheminement est present dans une
2792             //-- autre ligne .
2793             //-----------------------------------------------
2794             RejetLigne = Standard_False;
2795             Point3dDebut = PW.Value(1).Value();
2796             const IntSurf_PntOn2S& PointFin = PW.Value(PW.NbPoints());
2797             Point3dFin   = PointFin.Value();
2798
2799             for(ver=1 ; ver<= NbLigCalculee ; ver++)
2800             {
2801               const Handle(IntPatch_WLine)& verwline = *((Handle(IntPatch_WLine)*)&SLin.Value(ver));
2802               //-- Handle(IntPatch_WLine) verwline=Handle(IntPatch_WLine)::DownCast(SLin.Value(ver));
2803
2804               // Check end point if it is on existing line.
2805               // Start point is checked before.
2806               if (IsPointOnLine(PointFin, verwline, Deflection))
2807               {
2808                 RejetLigne = Standard_True;
2809                 break;
2810               }
2811
2812               const IntSurf_PntOn2S& verPointDebut = verwline->Point(1);
2813               const IntSurf_PntOn2S& verPointFin   = verwline->Point(verwline->NbPnts());
2814               if( (Point3dDebut.Distance(verPointDebut.Value()) < TolTangency) ||
2815                   (Point3dFin.Distance(verPointFin.Value()) < TolTangency))
2816               {
2817                 RejetLigne = Standard_True;
2818                 break;
2819               }
2820             }
2821
2822             if(RejetLigne)
2823             {
2824               DublicateOfLinesProcessing(PW, ver, SLin, RejetLigne);
2825             }
2826
2827             if(!RejetLigne)
2828             {
2829               IntSurf_TypeTrans trans1,trans2;
2830               Standard_Real locu,locv;
2831               gp_Vec norm1,norm2,d1u,d1v;
2832               gp_Pnt ptbid;
2833               Standard_Integer indextg;
2834               gp_Vec tgline(PW.TangentAtLine(indextg));
2835               PW.Line()->Value(indextg).ParametersOnS1(locu,locv);
2836               Surf1->D1(locu,locv,ptbid,d1u,d1v);
2837               norm1 = d1u.Crossed(d1v);
2838               PW.Line()->Value(indextg).ParametersOnS2(locu,locv);
2839               Surf2->D1(locu,locv,ptbid,d1u,d1v);
2840               norm2 = d1u.Crossed(d1v);
2841               if (tgline.DotCross(norm2,norm1)>0.)
2842               {
2843                 trans1 = IntSurf_Out;
2844                 trans2 = IntSurf_In;
2845               }
2846               else {
2847                 trans1 = IntSurf_In;
2848                 trans2 = IntSurf_Out;
2849               }
2850
2851               Standard_Real TolTang = TolTangency;
2852               Handle(IntPatch_WLine) wline = new IntPatch_WLine(PW.Line(),Standard_False,trans1,trans2);
2853               IntPatch_RstInt::PutVertexOnLine(wline,Surf1,D1,Surf2,Standard_True,TolTang);
2854               IntPatch_RstInt::PutVertexOnLine(wline,Surf2,D2,Surf1,Standard_False,TolTang);
2855
2856               //---------------
2857               if(wline->NbVertex() == 0)
2858               {
2859                 IntPatch_Point vtx;
2860                 const IntSurf_PntOn2S& POn2Sf = PW.Line()->Value(1);
2861                 POn2Sf.Parameters(pu1,pv1,pu2,pv2);
2862                 vtx.SetValue(Point3dDebut,TolTang,Standard_False);
2863                 vtx.SetParameters(pu1,pv1,pu2,pv2);
2864                 vtx.SetParameter(1);
2865                 wline->AddVertex(vtx);
2866
2867                 const IntSurf_PntOn2S& POn2Sl = PW.Line()->Value(wline->NbPnts());
2868                 POn2Sl.Parameters(pu1,pv1,pu2,pv2);
2869                 vtx.SetValue(Point3dFin,TolTang,Standard_False);
2870                 vtx.SetParameters(pu1,pv1,pu2,pv2);
2871                 vtx.SetParameter(wline->NbPnts());
2872                 wline->AddVertex(vtx);
2873               }
2874
2875               //---------------
2876               AddWLine(SLin, wline, Deflection);
2877               empt = Standard_False;
2878             }
2879             else
2880             {
2881               //-- cout<<" ----- REJET DE LIGNE (POINT DE DEPART) ----- "<<endl;
2882             }
2883             //------------------------------------------------------------
2884           }
2885         }  //--  le cheminement a reussi (done a True)
2886       }  //--  le point approche ne renvoie pas sur une ligne existante
2887     } //-- Si HasStartPoint
2888   } //-- Boucle sur Les Tangent Zones
2889 }
2890 //modified by NIZNHY-PKV Wed May 25 09:39:07 2011f
2891 //=======================================================================
2892 //class : IntPatch_InfoPD
2893 //purpose  :
2894 //=======================================================================
2895 class IntPatch_InfoPD {
2896 public:
2897   //----------------------------------------C-tor
2898   IntPatch_InfoPD(const Standard_Integer aNBI) {
2899     Standard_Integer aNBI2, i, j;
2900     myNBI=aNBI;
2901     //
2902     aNBI2=aNBI*aNBI;
2903     myP1DS2=new char[aNBI2];
2904     myP2DS1=new char[aNBI2];
2905     myIP1=new Standard_Integer[aNBI2];
2906     myIP2=new Standard_Integer[aNBI2];
2907     myP1=new gp_Pnt[aNBI2];
2908     myP2=new gp_Pnt[aNBI2];
2909     //
2910     for (i=0; i<myNBI; ++i) {
2911       for (j=0; j<myNBI; ++j) {
2912         xP1DS2(i, j)=0;
2913         xP2DS1(i, j)=0;
2914         xIP1(i, j)=0;
2915         xIP2(i, j)=0;
2916         xP1(i, j).SetCoord(0., 0., 0.);
2917         xP2(i, j).SetCoord(0., 0., 0.);
2918       }
2919     }
2920   };
2921   //---------------------------------------- D-tor
2922   ~IntPatch_InfoPD() {
2923     delete [] (char*) myP1DS2;
2924     delete [] (char*) myP2DS1;
2925     delete [] (Standard_Integer*) myIP1;
2926     delete [] (Standard_Integer*) myIP2;
2927     delete [] (gp_Pnt*)myP1;
2928     delete [] (gp_Pnt*)myP2;
2929   };
2930   //---------------------------------------- Index
2931   Standard_Integer Index(const Standard_Integer i,
2932     const Standard_Integer j) const {
2933       return i*myNBI+j;
2934   };
2935   //---------------------------------------- NBI
2936   Standard_Integer NBI() const {
2937     return myNBI;
2938   };
2939   //----------------------------------------xP1DS2
2940   char& xP1DS2(const Standard_Integer i,
2941     const Standard_Integer j) {
2942       return myP1DS2[Index(i,j)];
2943   };
2944   //----------------------------------------xP2DS1
2945   char& xP2DS1(const Standard_Integer i,
2946     const Standard_Integer j) {
2947       return myP2DS1[Index(i,j)];
2948   };
2949   //----------------------------------------xIP1
2950   Standard_Integer& xIP1(const Standard_Integer i,
2951     const Standard_Integer j) {
2952       return myIP1[Index(i,j)];
2953   };
2954   //----------------------------------------xIP2
2955   Standard_Integer& xIP2(const Standard_Integer i,
2956     const Standard_Integer j) {
2957       return myIP2[Index(i,j)];
2958   };
2959   //----------------------------------------xP1
2960   gp_Pnt& xP1(const Standard_Integer i,
2961     const Standard_Integer j) {
2962       return myP1[Index(i,j)];
2963   };
2964   //----------------------------------------xP1
2965   gp_Pnt& xP2(const Standard_Integer i,
2966     const Standard_Integer j) {
2967       return myP2[Index(i,j)];
2968   };
2969
2970 private:
2971
2972   IntPatch_InfoPD (const IntPatch_InfoPD&);
2973   IntPatch_InfoPD& operator=(const IntPatch_InfoPD&);
2974
2975 private:
2976
2977   Standard_Integer myNBI;
2978   char *myP1DS2;
2979   char *myP2DS1;
2980   Standard_Integer *myIP1;
2981   Standard_Integer *myIP2;
2982   gp_Pnt *myP1;
2983   gp_Pnt *myP2;
2984 };
2985 //modified by NIZNHY-PKV Tue May 24 11:38:55 2011t
2986 //==================================================================================
2987 // function : PointDepart
2988 // purpose  :
2989 //==================================================================================
2990 void IntPatch_PrmPrmIntersection::PointDepart(Handle(IntSurf_LineOn2S)& LineOn2S,
2991                                               const Handle(Adaptor3d_HSurface)& S1,
2992                                               const Standard_Integer SU_1,
2993                                               const Standard_Integer SV_1,
2994                                               const Handle(Adaptor3d_HSurface)& S2,
2995                                               const Standard_Integer SU_2,
2996                                               const Standard_Integer SV_2) const
2997 {
2998   Standard_Integer i, j, xNBI;
2999   //modified by NIZNHY-PKV Tue May 24 11:37:38 2011f
3000   xNBI=200;
3001   IntPatch_InfoPD aIPD(xNBI);
3002   //modified by NIZNHY-PKV Wed May 25 06:47:12 2011t
3003   Standard_Integer iC15, SU1, SV1, SU2, SV2;
3004   Standard_Real U0, U1, V0, V1, U, V;
3005   Standard_Real resu0,resv0;
3006   Standard_Real  du1,du2,dv1,dv2, dmaxOn1, dmaxOn2;
3007   Standard_Real x0,y0,z0, x1,y1,z1,d;
3008   Bnd_Box Box1, Box2;
3009   //
3010   iC15=15;
3011   SU1 =iC15*SU_1 ;
3012   SV1 =iC15*SV_1 ;
3013   SU2 =iC15*SU_2 ;
3014   SV2 =iC15*SV_2 ;
3015   //
3016   if(xNBI<SU1) {
3017     SU1 = xNBI;
3018   }
3019   if(xNBI<SV1){
3020     SV1 = xNBI;
3021   }
3022   if(xNBI<SU2){
3023     SU2 = xNBI;
3024   }
3025   if(xNBI<SV2){
3026     SV2 = xNBI;
3027   }
3028   //
3029   U0 = S1->FirstUParameter();
3030   U1 = S1->LastUParameter();
3031   V0 = S1->FirstVParameter();
3032   V1 = S1->LastVParameter();
3033   //
3034   resu0=U0;
3035   resv0=V0;
3036   //
3037   dmaxOn1 = 0.0;
3038   dmaxOn2 = 0.0;
3039   //-----
3040   du1 = (U1-U0)/(SU1-1);
3041   dv1 = (V1-V0)/(SV1-1);
3042   for(U=U0,i=0; i<SU1; i++,U+=du1) {
3043     for(V=V0,j=0; j<SV1; V+=dv1,j++) {
3044       aIPD.xP1(i, j)= S1->Value(U,V);
3045       Box1.Add(aIPD.xP1(i, j));
3046       if(i>0 && j>0) {
3047         aIPD.xP1(i, j)    .Coord(x0,y0,z0);
3048         aIPD.xP1(i-1, j-1).Coord(x1,y1,z1);
3049         //
3050         d=Abs(x1-x0)+Abs(y1-y0)+Abs(z1-z0);
3051         if(d>dmaxOn1) {
3052           dmaxOn1 = d;
3053         }
3054       }
3055     }
3056   }
3057   Box1.Enlarge(1.e-8);
3058   //
3059   U0 = S2->FirstUParameter();
3060   U1 = S2->LastUParameter();
3061   V0 = S2->FirstVParameter();
3062   V1 = S2->LastVParameter();
3063   //
3064   du2 = (U1-U0)/(SU2-1);
3065   dv2 = (V1-V0)/(SV2-1);
3066   for(U=U0,i=0; i<SU2; i++,U+=du2) {
3067     for(V=V0,j=0; j<SV2; V+=dv2,j++) {
3068       aIPD.xP2(i, j) = S2->Value(U,V);
3069       Box2.Add(aIPD.xP2(i, j));
3070       if(i>0 && j>0) {
3071         aIPD.xP2(i, j)    .Coord(x0,y0,z0);
3072         aIPD.xP2(i-1, j-1).Coord(x1,y1,z1);
3073         d =  Abs(x1-x0)+Abs(y1-y0)+Abs(z1-z0);
3074         if(d>dmaxOn2) {
3075           dmaxOn2 = d;
3076         }
3077       }
3078     }
3079   }
3080   Box2.Enlarge(1.e-8);
3081   //--------
3082   //
3083   if(Box1.IsOut(Box2)) {
3084
3085     return;
3086   }
3087   //
3088   Standard_Integer aNbPG;
3089   Standard_Real x10,y10,z10,x11,y11,z11;
3090   Standard_Real x20,y20,z20,x21,y21,z21;
3091   Standard_Real dx, dy, dz, dmax;
3092   Standard_Real dx2, dy2, dz2;
3093   //
3094   Box1.Get(x10,y10,z10,x11,y11,z11);
3095   Box2.Get(x20,y20,z20,x21,y21,z21);
3096   //
3097   x0 = (x10>x20)? x10 : x20;
3098   y0 = (y10>y20)? y10 : y20;
3099   z0 = (z10>z20)? z10 : z20;
3100   //
3101   x1 = (x11<x21)? x11 : x21;
3102   y1 = (y11<y21)? y11 : y21;
3103   z1 = (z11<z21)? z11 : z21;
3104   //
3105   if(dmaxOn2 > dmaxOn1) {
3106     dmaxOn1 = dmaxOn2;
3107   }
3108   //
3109   dmaxOn1+=dmaxOn1;
3110   x0-=dmaxOn1;
3111   y0-=dmaxOn1;
3112   z0-=dmaxOn1;
3113   x1+=dmaxOn1;
3114   y1+=dmaxOn1;
3115   z1+=dmaxOn1;
3116   //
3117   x10-=dmaxOn1;   y10-=dmaxOn1;   z10-=dmaxOn1;
3118   x11+=dmaxOn1;   y11+=dmaxOn1;   z11+=dmaxOn1;
3119
3120   x20-=dmaxOn1;   y20-=dmaxOn1;   z20-=dmaxOn1;
3121   x21+=dmaxOn1;   y21+=dmaxOn1;   z21+=dmaxOn1;
3122
3123   aNbPG=NbPointsGrille();
3124   dx = (x1-x0)/aNbPG;
3125   dy = (y1-y0)/aNbPG;
3126   dz = (z1-z0)/aNbPG;
3127   //
3128   dmax = dx;
3129   if(dy>dmax) {
3130     dmax = dy;
3131   }
3132   if(dz>dmax){
3133     dmax = dz;
3134   }
3135   //
3136   if(dx<dmax*0.01) {
3137     dx = dmax*0.01;
3138   }
3139   if(dy<dmax*0.01) {
3140     dy = dmax*0.01;
3141   }
3142   if(dz<dmax*0.01) {
3143     dz = dmax*0.01;
3144   }
3145   //
3146   dx2 = dx*0.5;
3147   dy2 = dy*0.5;
3148   dz2 = dz*0.5 ;
3149   //
3150   IntPatch_PrmPrmIntersection_T3Bits M1(_BASE);
3151   IntPatch_PrmPrmIntersection_T3Bits M2(_BASE);
3152   //
3153   for(i=0;i<SU1;i++) {
3154     for(j=0;j<SV1;j++) {
3155       aIPD.xIP1(i, j)=-1;
3156       const gp_Pnt& P=aIPD.xP1(i, j);
3157       aIPD.xP1DS2(i, j) = (char)CodeReject(x20,y20,z20,x21,y21,z21,P.X(),P.Y(),P.Z());
3158       int ix = (int)((P.X()-x0  + dx2 )/dx);
3159       if(DansGrille(ix)) {
3160         int iy = (int)((P.Y()-y0 + dy2)/dy);
3161         if(DansGrille(iy)) {
3162           int iz = (int)((P.Z()-z0 + dz2)/dz);
3163           if(DansGrille(iz)) {
3164             aIPD.xIP1(i, j) = GrilleInteger(ix,iy,iz);
3165           }
3166         }
3167       }
3168     }
3169   }
3170   //-- cout<<" Grille  du 1 fini "<<endl;
3171   for(i=0;i<SU2;i++) {
3172     for(j=0;j<SV2;j++) {
3173       aIPD.xIP2(i, j)=-1;
3174       const gp_Pnt& P=aIPD.xP2(i, j);
3175       aIPD.xP2DS1(i, j) = (char)CodeReject(x10,y10,z10,x11,y11,z11,P.X(),P.Y(),P.Z());
3176       int ix = (int)((P.X()-x0 + dx2)/dx);
3177       if(DansGrille(ix)) {
3178         int iy = (int)((P.Y()-y0 + dy2)/dy);
3179         if(DansGrille(iy)) {
3180           int iz = (int)((P.Z()-z0 + dz2)/dz);
3181           if(DansGrille(iz)) {
3182             aIPD.xIP2(i, j) =  GrilleInteger(ix,iy,iz);
3183           }
3184         }
3185       }
3186     }
3187   }
3188   //
3189   for(i=0;i<SU1-1;i+=1) {
3190     for(j=0;j<SV1-1;j+=1) {
3191       if(!((aIPD.xP1DS2(i, j) & aIPD.xP1DS2(i+1, j)) ||
3192         (aIPD.xP1DS2(i, j) & aIPD.xP1DS2(i+1, j+1)))){
3193           Remplit(aIPD.xIP1(i, j),
3194             aIPD.xIP1(i+1, j),
3195             aIPD.xIP1(i+1, j+1),
3196             M1);
3197       }
3198       if(!((aIPD.xP1DS2(i, j) & aIPD.xP1DS2(i, j+1)) ||
3199         (aIPD.xP1DS2(i, j) & aIPD.xP1DS2(i+1, j+1)))) {
3200           Remplit(aIPD.xIP1(i, j),
3201             aIPD.xIP1(i, j+1),
3202             aIPD.xIP1(i+1, j+1),
3203             M1);
3204       }
3205     }
3206   }
3207   //
3208   for(i=0;i<SU2-1;i+=1) {
3209     for(j=0;j<SV2-1;j+=1) {
3210       if(!((aIPD.xP2DS1(i, j) & aIPD.xP2DS1(i+1, j)) ||
3211         (aIPD.xP2DS1(i, j) & aIPD.xP2DS1(i+1, j+1)))){
3212           Remplit(aIPD.xIP2(i, j),
3213             aIPD.xIP2(i+1, j),
3214             aIPD.xIP2(i+1, j+1),
3215             M2);
3216       }
3217       if(!((aIPD.xP2DS1(i, j) & aIPD.xP2DS1(i, j+1)) ||
3218         (aIPD.xP2DS1(i, j) & aIPD.xP2DS1(i+1, j+1)))){
3219           Remplit(aIPD.xIP2(i, j),
3220             aIPD.xIP2(i, j+1),
3221             aIPD.xIP2(i+1, j+1),
3222             M2);
3223       }
3224     }
3225   }
3226   //
3227   M1.ResetAnd();
3228   M2.ResetAnd();
3229   //
3230   int newind=0;
3231   long unsigned Compt=0;
3232   int ok=0;
3233   int indicepointtraite = 0;
3234   Standard_Integer k,nu,nv;
3235   //
3236   do {
3237     indicepointtraite--;
3238     ok = M1.And(M2,newind);
3239     if(ok) {
3240       IntegerGrille(newind,i,j,k);
3241       int nb=0;
3242       int LIM=3;
3243       if(   DansGrille(i-1) && DansGrille(j-1) && DansGrille(k-1)
3244         && DansGrille(i+1) && DansGrille(j+1) && DansGrille(k+1)) {
3245           int si,sj,sk;
3246           for(si=-1; si<= 1 && nb<LIM; si++) {
3247             for(sj=-1; sj<= 1 && nb<LIM; sj++) {
3248               for(sk=-1; sk<= 1 && nb<LIM; sk++) {
3249                 long unsigned lu=GrilleInteger(i+si,j+sj,k+sk);
3250                 if(M1.Val(lu) && M2.Val(lu)) {
3251                   nb++;
3252                 }
3253               }
3254             }
3255           }
3256           if(nb>=LIM) {
3257             for(si=-1; si<= 1; si++) {
3258               for(sj=-1; sj<= 1; sj++) {
3259                 for(sk=-1; sk<= 1; sk++) {
3260                   if(si || sj || sk) {
3261                     long unsigned lu=GrilleInteger(i+si,j+sj,k+sk);
3262                     M1.Raz(lu);
3263                   }
3264                 }
3265               }
3266             }
3267           }
3268       }
3269       //
3270       gp_Pnt P(dx*i + x0, dy*j + y0, dz*k+z0);
3271       //
3272       Standard_Integer nu1=-1,nu2=-1;
3273       Standard_Integer nv1=0, nv2=0;
3274       int nbsur1 = 0;
3275       for(nu=0;nu1<0 && nu<SU1;nu++) {
3276         for(nv=0;nu1<0 && nv<SV1;nv++) {
3277           if( aIPD.xIP1(nu, nv) ==(Standard_Integer) newind )  {
3278             nbsur1++;
3279             aIPD.xIP1(nu, nv)=indicepointtraite;
3280             nu1=nu; nv1=nv;
3281           }
3282         }
3283       }
3284       if(nu1>=0) {
3285         int nbsur2 = 0;
3286         for(nu=0;nu2<0 && nu<SU2;nu++) {
3287           for(nv=0;nu2<0 && nv<SV2;nv++) {
3288             if( aIPD.xIP2(nu, nv)==(Standard_Integer) newind )  {
3289               nbsur2++;
3290               aIPD.xIP2(nu, nv)=indicepointtraite;
3291               nu2=nu; nv2=nv;
3292             }
3293           }
3294         }
3295       }
3296       if(nu1>=0 && nu2>=0) {
3297         IntSurf_PntOn2S POn2S;
3298         POn2S.SetValue(P,
3299           S1->FirstUParameter()+nu1*du1,
3300           S1->FirstVParameter()+nv1*dv1,
3301           S2->FirstUParameter()+nu2*du2,
3302           S2->FirstVParameter()+nv2*dv2);
3303         LineOn2S->Add(POn2S);
3304         Compt++;
3305       }
3306       else {
3307         //-- aucun point du triangle n a ete trouve assez proche
3308         //-- on recherche les 3 points les plus proches de P
3309         //-- dans chacun des tableaux
3310         Standard_Real Dist3[3],u3[3] = { 0.0, 0.0, 0.0 },v3[3] = { 0.0, 0.0, 0.0 };
3311         Dist3[0]=Dist3[1]=Dist3[2]=RealLast();
3312         for(U=resu0,i=0; i<SU1; i++,U+=du1) {
3313           for(V=resv0,j=0; j<SV1; V+=dv1,j++) {
3314             //-- On place les 3 meilleures valeurs dans Dist1,Dist2,Dist3
3315             Standard_Real t = aIPD.xP1(i, j).SquareDistance(P);
3316             //-- On remplace la plus grande valeur ds Dist[.] par la val courante
3317             if(Dist3[0]<Dist3[1]) {
3318               Standard_Real z;
3319               z=Dist3[0]; Dist3[0]=Dist3[1]; Dist3[1]=z;
3320               z=u3[0]; u3[0]=u3[1]; u3[1]=z;
3321               z=v3[0]; v3[0]=v3[1]; v3[1]=z;
3322             }
3323             if(Dist3[1]<Dist3[2]) {
3324               Standard_Real z;
3325               z=Dist3[1]; Dist3[1]=Dist3[2]; Dist3[2]=z;
3326               z=u3[1]; u3[1]=u3[2]; u3[2]=z;
3327               z=v3[1]; v3[1]=v3[2]; v3[2]=z;
3328             }
3329             if(Dist3[0]<Dist3[1]) {
3330               Standard_Real z;
3331               z=Dist3[0]; Dist3[0]=Dist3[1]; Dist3[1]=z;
3332               z=u3[0]; u3[0]=u3[1]; u3[1]=z;
3333               z=v3[0]; v3[0]=v3[1]; v3[1]=z;
3334             }
3335             //-- la plus grande valeur est dans Dist3[0]
3336             if(t<Dist3[0]) {
3337               Dist3[0]=t; u3[0]=U; v3[0]=V;
3338             }
3339           }
3340         }
3341         //
3342         Standard_Real U1_3 = (u3[0]+u3[1]+u3[2])/3.0;
3343         Standard_Real V1_3 = (v3[0]+v3[1]+v3[2])/3.0;
3344
3345         Dist3[0]=Dist3[1]=Dist3[2]=RealLast();
3346         for(U=U0,i=0; i<SU2; i++,U+=du2) {
3347           for(V=V0,j=0; j<SV2; V+=dv2,j++) {
3348             //-- On place les 3 meilleures valeurs dans Dist1,Dist2,Dist3
3349             Standard_Real t = aIPD.xP2(i, j).SquareDistance(P);
3350             //-- On remplace la plus grande valeur ds Dist3[.] par la val courante
3351             if(Dist3[0]<Dist3[1]) {
3352               Standard_Real z;
3353               z=Dist3[0]; Dist3[0]=Dist3[1]; Dist3[1]=z;
3354               z=u3[0]; u3[0]=u3[1]; u3[1]=z;
3355               z=v3[0]; v3[0]=v3[1]; v3[1]=z;
3356             }
3357             if(Dist3[1]<Dist3[2]) {
3358               Standard_Real z;
3359               z=Dist3[1]; Dist3[1]=Dist3[2]; Dist3[2]=z;
3360               z=u3[1]; u3[1]=u3[2]; u3[2]=z;
3361               z=v3[1]; v3[1]=v3[2]; v3[2]=z;
3362             }
3363             if(Dist3[0]<Dist3[1]) {
3364               Standard_Real z;
3365               z=Dist3[0]; Dist3[0]=Dist3[1]; Dist3[1]=z;
3366               z=u3[0]; u3[0]=u3[1]; u3[1]=z;
3367               z=v3[0]; v3[0]=v3[1]; v3[1]=z;
3368             }
3369             //-- la plus grande valeur est dans Dist3[0]
3370             if(t<Dist3[0]) {
3371               Dist3[0]=t; u3[0]=U; v3[0]=V;
3372             }
3373           }
3374         }
3375         //
3376         Standard_Real U2_3 = (u3[0]+u3[1]+u3[2])/3.0;
3377         Standard_Real V2_3 = (v3[0]+v3[1]+v3[2])/3.0;
3378         //
3379         IntSurf_PntOn2S POn2S;
3380         POn2S.SetValue(P,U1_3,V1_3,U2_3,V2_3);
3381         LineOn2S->Add(POn2S);
3382         Compt++;
3383       }
3384     }
3385   }
3386   while(ok);
3387 }
3388
3389 //==================================================================================
3390 // function : IsPointOnLine
3391 // purpose  :
3392 //==================================================================================
3393
3394 Standard_Boolean IsPointOnLine(const IntSurf_PntOn2S        &thePOn2S,
3395                                const Handle(IntPatch_WLine) &theWLine,
3396                                const Standard_Real           Deflection)
3397 {
3398   Standard_Boolean isOnLine = Standard_False;
3399   Standard_Real Deflection2 = Deflection*Deflection;
3400   Standard_Real pu1, pu2, pv1, pv2;
3401
3402   thePOn2S.Parameters(pu1, pv1, pu2, pv2);
3403
3404   if ((theWLine->IsOutSurf1Box(gp_Pnt2d(pu1, pv1)) == Standard_False) &&
3405     (theWLine->IsOutSurf2Box(gp_Pnt2d(pu2, pv2)) == Standard_False) &&
3406     (theWLine->IsOutBox(thePOn2S.Value())        == Standard_False)) {
3407       const Standard_Integer NbPntOn2SOnLine = theWLine->NbPnts();
3408       Standard_Integer ll;
3409
3410       for (ll=1; ll < NbPntOn2SOnLine && !isOnLine; ll++) {
3411         const gp_Pnt &Pa     = theWLine->Point(ll).Value();
3412         const gp_Pnt &Pb     = theWLine->Point(ll+1).Value();
3413         const gp_Pnt &PStart = thePOn2S.Value();
3414         const gp_Vec  AM(Pa, PStart);
3415         const gp_Vec  MB(PStart,Pb);
3416         const Standard_Real AMMB = AM.Dot(MB);
3417
3418         if(AMMB > 0.0) {
3419           gp_Dir ABN(Pb.X() - Pa.X(), Pb.Y() - Pa.Y(), Pb.Z() - Pa.Z());
3420           Standard_Real lan =  ABN.X()*AM.X() + ABN.Y()*AM.Y() + ABN.Z()*AM.Z();
3421           gp_Vec AH(lan*ABN.X(), lan*ABN.Y(), lan*ABN.Z());
3422           gp_Vec HM(AM.X() - AH.X(), AM.Y() - AH.Y(), AM.Z() - AH.Z());
3423           Standard_Real d = 0.0;
3424
3425           if(HM.X() < Deflection) {
3426             d += HM.X()*HM.X();
3427
3428             if(HM.Y() < Deflection) {
3429               d += HM.Y()*HM.Y();
3430
3431               if(HM.Z() < Deflection) {
3432                 d += HM.Z()*HM.Z();
3433               } else {
3434                 d = Deflection2;
3435               }
3436             } else {
3437               d = Deflection2;
3438             }
3439           } else {
3440             d = Deflection2;
3441           }
3442
3443           if(d < Deflection2) {
3444             isOnLine = Standard_True;
3445           }
3446         } else {
3447           Standard_Real dab = Pa.SquareDistance(Pb);
3448           Standard_Real dap = Pa.SquareDistance(PStart);
3449
3450           if(dap < dab) {
3451             isOnLine = Standard_True;
3452           } else {
3453             Standard_Real dbp = Pb.SquareDistance(PStart);
3454
3455             if(dbp < dab) {
3456               isOnLine = Standard_True;
3457             }
3458           }
3459         }
3460       }
3461   }
3462
3463   return isOnLine;
3464 }
3465
3466 //==================================================================================
3467 // function : AddWLine
3468 // purpose  :
3469 //==================================================================================
3470
3471 void AddWLine(IntPatch_SequenceOfLine      &theLines,
3472               const Handle(IntPatch_WLine) &theWLine,
3473               const Standard_Real           Deflection)
3474 {
3475   Standard_Integer i = 1;
3476   Standard_Integer aNbLines = theLines.Length();
3477   Standard_Boolean isToRemove;
3478
3479   // Check each line of theLines if it is on theWLine.
3480   while (i <= aNbLines) {
3481     Handle(IntPatch_WLine) aWLine =
3482       Handle(IntPatch_WLine)::DownCast(theLines.Value(i));
3483
3484     isToRemove = Standard_False;
3485
3486     if (aWLine.IsNull() == Standard_False) {
3487       // Check the middle point.
3488       Standard_Integer aMidIndex = (aWLine->NbPnts() + 1)/2;
3489
3490       if (aMidIndex > 0) {
3491         const IntSurf_PntOn2S &aPnt = aWLine->Point(aMidIndex);
3492
3493         if (IsPointOnLine(aPnt, theWLine, Deflection)) {
3494           // Middle point is on theWLine. Check vertices.
3495           isToRemove = Standard_True;
3496
3497           Standard_Integer j;
3498           const Standard_Integer aNbVtx = aWLine->NbVertex();
3499
3500           for (j = 1; j <= aNbVtx; j++) {
3501             const IntPatch_Point &aPoint = aWLine->Vertex(j);
3502
3503             if (!IsPointOnLine(aPoint.PntOn2S(), theWLine, Deflection)) {
3504               isToRemove = Standard_False;
3505               break;
3506             }
3507           }
3508         }
3509       }
3510     }
3511
3512     if (isToRemove) {
3513       theLines.Remove(i);
3514       aNbLines--;
3515     } else {
3516       i++;
3517     }
3518   }
3519
3520   // Add theWLine to the sequence of lines.
3521   theLines.Append(theWLine);
3522 }