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// 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));
}
}
}
}
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