OCC22322 Improvement extrema Additional integration

[occt.git] / src / BRepExtrema / BRepExtrema_ExtPF.cxx

// File:	BRepExtrema_ExtPF.cxx
// Created:	Wed Dec 15 16:48:53 1993
// Author:	Christophe MARION
// modified by MPS (june 96) : on utilise BRepClass_FaceClassifier seulement 
//  si IsDone de Extrema est vrai  

#include <BRepExtrema_ExtPF.hxx>

#include <BRep_Tool.hxx>
#include <BRepTools.hxx>
#include <BRepClass_FaceClassifier.hxx>
#include <gp_Pnt2d.hxx>
#include <BRepAdaptor_Surface.hxx>

//=======================================================================
//function : BRepExtrema_ExtPF
//purpose  : 
//=======================================================================

BRepExtrema_ExtPF::BRepExtrema_ExtPF(const TopoDS_Vertex& TheVertex, const TopoDS_Face& TheFace,
                                     const Extrema_ExtFlag TheFlag, const Extrema_ExtAlgo TheAlgo)
{
  Initialize(TheFace,TheFlag,TheAlgo);
  Perform(TheVertex,TheFace);
}

//=======================================================================
//function : Initialize
//purpose  : 
//=======================================================================

void BRepExtrema_ExtPF::Initialize(const TopoDS_Face& TheFace,
                                   const Extrema_ExtFlag TheFlag, const Extrema_ExtAlgo TheAlgo)
{
  // cette surface doit etre en champ. Extrema ne fait
  // pas de copie et prend seulement un pointeur dessus.
  mySurf.Initialize(TheFace, Standard_False); 
  const Standard_Real Tol = BRep_Tool::Tolerance(TheFace);
  Standard_Real U1, U2, V1, V2;
  BRepTools::UVBounds(TheFace, U1, U2, V1, V2);
  myExtPS.SetFlag(TheFlag);
  myExtPS.SetAlgo(TheAlgo);
  myExtPS.Initialize(mySurf, U1, U2, V1, V2, Tol, Tol);
}

//=======================================================================
//function : Perform
//purpose  : 
//=======================================================================

void BRepExtrema_ExtPF::Perform(const TopoDS_Vertex& TheVertex, const TopoDS_Face& TheFace)
{
  mySqDist.Clear();
  myPoints.Clear();

  const gp_Pnt P = BRep_Tool::Pnt(TheVertex);
  myExtPS.Perform(P);

  // Exploration of points and classification
  if (myExtPS.IsDone())
  {
    BRepClass_FaceClassifier classifier;
    Standard_Real U1, U2;
    const Standard_Real Tol = BRep_Tool::Tolerance(TheFace);
    for (Standard_Integer i = 1; i <= myExtPS.NbExt(); i++)
    {
      myExtPS.Point(i).Parameter(U1, U2);
      const gp_Pnt2d Puv(U1, U2);
      classifier.Perform(TheFace, Puv, Tol);
      const TopAbs_State state = classifier.State();
      if(state == TopAbs_ON || state == TopAbs_IN)
      {
        mySqDist.Append(myExtPS.SquareDistance(i));
        myPoints.Append(myExtPS.Point(i));
      }
    }
  }
}