occt/src/IntPatch/IntPatch_ImpImpIntersection_6.gxx

// Created on: 1992-05-07
// Created by: Jacques GOUSSARD
// Copyright (c) 1992-1999 Matra Datavision
// Copyright (c) 1999-2012 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.


static 
  Standard_Boolean TreatResultTorus(const IntSurf_Quadric& theQuad1,
                                    const IntSurf_Quadric& theQuad2,
                                    const IntAna_QuadQuadGeo& anInt,
                                    Standard_Boolean& bEmpty,
                                    IntPatch_SequenceOfLine& theSeqLin);

//=======================================================================
//function : IntCyTo
//purpose  : 
//=======================================================================
Standard_Boolean IntCyTo(const IntSurf_Quadric& theQuad1,
                         const IntSurf_Quadric& theQuad2,
                         const Standard_Real theTolTang,
                         const Standard_Boolean bReversed,
                         Standard_Boolean& bEmpty,
                         IntPatch_SequenceOfLine& theSeqLin)
{
  const gp_Cylinder aCyl = bReversed ? theQuad2.Cylinder() : theQuad1.Cylinder();
  const gp_Torus aTorus = bReversed ? theQuad1.Torus() : theQuad2.Torus();
  //
  IntAna_QuadQuadGeo anInt(aCyl, aTorus, theTolTang);
  Standard_Boolean bRet = 
    TreatResultTorus(theQuad1, theQuad2, anInt, bEmpty, theSeqLin);
  //
  return bRet;
}

//=======================================================================
//function : IntCoTo
//purpose  : 
//=======================================================================
Standard_Boolean IntCoTo(const IntSurf_Quadric& theQuad1,
                         const IntSurf_Quadric& theQuad2,
                         const Standard_Real theTolTang,
                         const Standard_Boolean bReversed,
                         Standard_Boolean& bEmpty,
                         IntPatch_SequenceOfLine& theSeqLin)
{
  const gp_Cone aCone = bReversed ? theQuad2.Cone() : theQuad1.Cone();
  const gp_Torus aTorus = bReversed ? theQuad1.Torus() : theQuad2.Torus();
  //
  IntAna_QuadQuadGeo anInt(aCone, aTorus, theTolTang);
  Standard_Boolean bRet = 
    TreatResultTorus(theQuad1, theQuad2, anInt, bEmpty, theSeqLin);
  //
  return bRet;
}

//=======================================================================
//function : IntSpTo
//purpose  : 
//=======================================================================
Standard_Boolean IntSpTo(const IntSurf_Quadric& theQuad1,
                         const IntSurf_Quadric& theQuad2,
                         const Standard_Real theTolTang,
                         const Standard_Boolean bReversed,
                         Standard_Boolean& bEmpty,
                         IntPatch_SequenceOfLine& theSeqLin)
{
  const gp_Sphere aSphere = bReversed ? theQuad2.Sphere() : theQuad1.Sphere();
  const gp_Torus aTorus = bReversed ? theQuad1.Torus() : theQuad2.Torus();
  //
  IntAna_QuadQuadGeo anInt(aSphere, aTorus, theTolTang);
  Standard_Boolean bRet = 
    TreatResultTorus(theQuad1, theQuad2, anInt, bEmpty, theSeqLin);
  //
  return bRet;
}

//=======================================================================
//function : IntToTo
//purpose  : 
//=======================================================================
Standard_Boolean IntToTo(const IntSurf_Quadric& theQuad1,
                         const IntSurf_Quadric& theQuad2,
                         const Standard_Real theTolTang,
                         Standard_Boolean& bSameSurf,
                         Standard_Boolean& bEmpty,
                         IntPatch_SequenceOfLine& theSeqLin)
{
  const gp_Torus aTorus1 = theQuad1.Torus();
  const gp_Torus aTorus2 = theQuad2.Torus();
  //
  IntAna_QuadQuadGeo anInt(aTorus1, aTorus2, theTolTang);
  Standard_Boolean bRet = anInt.IsDone();
  if (bRet) {
    if (anInt.TypeInter() == IntAna_Same) {
      bEmpty = Standard_False;
      bSameSurf = Standard_True;
    } else {
      bRet = TreatResultTorus(theQuad1, theQuad2, anInt, bEmpty, theSeqLin);
    }
  }
  //
  return bRet;
}

//=======================================================================
//function : TreatResultTorus
//purpose  : 
//=======================================================================
static Standard_Boolean TreatResultTorus(const IntSurf_Quadric& theQuad1,
                                         const IntSurf_Quadric& theQuad2,
                                         const IntAna_QuadQuadGeo& anInt,
                                         Standard_Boolean& bEmpty,
                                         IntPatch_SequenceOfLine& theSeqLin)
{
  Standard_Boolean bRet = anInt.IsDone();
  //
  if (!bRet) {
    return bRet;
  }
  //
  IntAna_ResultType typint = anInt.TypeInter();
  Standard_Integer NbSol = anInt.NbSolutions();
  bEmpty = Standard_False;
  //
  switch (typint) {
  case IntAna_Empty :
    bEmpty = Standard_True;
    break;
  //
  case IntAna_Circle : {
    Standard_Integer i;
    IntSurf_TypeTrans trans1, trans2;
    gp_Vec Tgt;
    gp_Pnt ptref;
    //
    for (i = 1; i <= NbSol; ++i) {
      gp_Circ aC = anInt.Circle(i);
      if (theQuad1.TypeQuadric() == theQuad2.TypeQuadric()) {
        AdjustToSeam(theQuad1.Torus(), aC);
      }
      ElCLib::D1(0., aC, ptref, Tgt);
      Standard_Real qwe = Tgt.DotCross(theQuad2.Normale(ptref),
                                       theQuad1.Normale(ptref));
      if(qwe> 0.00000001) {
        trans1 = IntSurf_Out;
        trans2 = IntSurf_In;
      }
      else if(qwe< -0.00000001) {
        trans1 = IntSurf_In;
        trans2 = IntSurf_Out;
      }
      else { 
        trans1=trans2=IntSurf_Undecided; 
      }
      //
      Handle(IntPatch_GLine) glig = 
        new IntPatch_GLine(aC, Standard_False, trans1, trans2);
      theSeqLin.Append(glig);
    }
  }
    break;
  //
  case IntAna_NoGeometricSolution:
  default:
    bRet = Standard_False;
    break;
  }
  //
  return bRet;
}