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// File: BRepExtrema_ExtFF.cxx
// Created: Wed Dec 15 16:48:53 1993
// Author: Christophe MARION
// modified by mps (juillet 96 ): on utilise BRepAdaptor a la place de
// GeomAdaptor dans Initialize et Perform.
#include <BRepExtrema_ExtFF.hxx>
#include <BRepExtrema_ExtCF.hxx>
#include <BRep_Tool.hxx>
#include <BRepTools.hxx>
#include <BRepClass_FaceClassifier.hxx>
#include <gp_Pnt2d.hxx>
#include <Precision.hxx>
#include <BRepAdaptor_HSurface.hxx>
//=======================================================================
//function : BRepExtrema_ExtFF
//purpose :
//=======================================================================
BRepExtrema_ExtFF::BRepExtrema_ExtFF(const TopoDS_Face& F1, const TopoDS_Face& F2)
{
Initialize(F2);
Perform(F1,F2);
}
//=======================================================================
//function : Initialize
//purpose :
//=======================================================================
void BRepExtrema_ExtFF::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);
myExtSS.Initialize(myHS->Surface(), U1, U2, V1, V2, Tol);
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void BRepExtrema_ExtFF::Perform(const TopoDS_Face& F1, const TopoDS_Face& F2)
{
mySqDist.Clear();
myPointsOnS1.Clear();
myPointsOnS2.Clear();
BRepAdaptor_Surface Surf1(F1);
Handle(BRepAdaptor_HSurface) HS1 = new BRepAdaptor_HSurface(Surf1);
const Standard_Real Tol1 = BRep_Tool::Tolerance(F1);
Standard_Real U1, U2, V1, V2;
BRepTools::UVBounds(F1, U1, U2, V1, V2);
myExtSS.Perform(HS1->Surface(), U1, U2, V1, V2, Tol1);
if (!myExtSS.IsDone())
return;
if (myExtSS.IsParallel())
mySqDist.Append(myExtSS.SquareDistance(1));
else
{
// Exploration of points and classification
BRepClass_FaceClassifier classifier;
const Standard_Real Tol2 = BRep_Tool::Tolerance(F2);
Extrema_POnSurf P1, P2;
Standard_Integer i;
for (i = 1; i <= myExtSS.NbExt(); i++)
{
myExtSS.Points(i, P1, P2);
P1.Parameter(U1, U2);
const gp_Pnt2d Puv1(U1, U2);
classifier.Perform(F1, Puv1, Tol1);
const TopAbs_State state1 = classifier.State();
if (state1 == TopAbs_ON || state1 == TopAbs_IN)
{
P2.Parameter(U1, U2);
const gp_Pnt2d Puv2(U1, U2);
classifier.Perform(F2, Puv2, Tol2);
const TopAbs_State state2 = classifier.State();
if (state2 == TopAbs_ON || state2 == TopAbs_IN)
{
mySqDist.Append(myExtSS.SquareDistance(i));
myPointsOnS1.Append(P1);
myPointsOnS2.Append(P2);
}
}
}
}
}
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