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// File: BRepExtrema_ExtCF.cxx
// Created: Wed Dec 15 16:48:53 1993
// Author: Christophe MARION
#include <BRepExtrema_ExtCF.hxx>
#include <BRep_Tool.hxx>
#include <BRepTools.hxx>
#include <Geom_Curve.hxx>
#include <BRepClass_FaceClassifier.hxx>
#include <gp_Pnt2d.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepAdaptor_HSurface.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRepAdaptor_HCurve.hxx>
//=======================================================================
//function : BRepExtrema_ExtCF
//purpose :
//=======================================================================
BRepExtrema_ExtCF::BRepExtrema_ExtCF(const TopoDS_Edge& E, const TopoDS_Face& F)
{
Initialize(F);
Perform(E, F);
}
//=======================================================================
//function : Initialize
//purpose :
//=======================================================================
void BRepExtrema_ExtCF::Initialize(const TopoDS_Face& F2)
{
BRepAdaptor_Surface Surf(F2);
myHS = new BRepAdaptor_HSurface(Surf);
const Standard_Real Tol = BRep_Tool::Tolerance(F2);
Standard_Real U1, U2, V1, V2;
BRepTools::UVBounds(F2, U1, U2, V1, V2);
myExtCS.Initialize(myHS->Surface(), U1, U2, V1, V2, Tol, Tol);
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void BRepExtrema_ExtCF::Perform(const TopoDS_Edge& E, const TopoDS_Face& F2)
{
mySqDist.Clear();
myPointsOnS.Clear();
myPointsOnC.Clear();
Standard_Real U1, U2;
BRep_Tool::Range(E, U1, U2);
BRepAdaptor_Curve Curv(E);
Handle(BRepAdaptor_HCurve) HC = new BRepAdaptor_HCurve(Curv);
myExtCS.Perform(HC->Curve(), U1, U2);
if(!myExtCS.IsDone())
return;
if (myExtCS.IsParallel())
mySqDist.Append(myExtCS.SquareDistance(1));
else
{
// Exploration of points and classification
BRepClass_FaceClassifier classifier;
const Standard_Real Tol = BRep_Tool::Tolerance(F2);
Extrema_POnCurv P1;
Extrema_POnSurf P2;
for (Standard_Integer i = 1; i <= myExtCS.NbExt(); i++)
{
myExtCS.Points(i, P1, P2);
P2.Parameter(U1, U2);
const gp_Pnt2d Puv(U1, U2);
classifier.Perform(F2, Puv, Tol);
const TopAbs_State state = classifier.State();
if (state == TopAbs_ON || state == TopAbs_IN)
{
mySqDist.Append(myExtCS.SquareDistance(i));
myPointsOnC.Append(P1);
myPointsOnS.Append(P2);
}
}
}
}
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