mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-05-21 10:55:33 +03:00
e5260e1dfa
Euclidean distance criteria is added for local point / surface extrema. Classes representing objective criteria are renamed to be consistent. Local extrema usage is updated according to new behavior. Test case is added. Misprint correction.
120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
// Created on: 2016-05-10
|
|
// Created by: Alexander MALYSHEV
|
|
// Copyright (c) 1995-1999 Matra Datavision
|
|
// Copyright (c) 1999-2016 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.
|
|
|
|
|
|
#include <Extrema_FuncPSDist.hxx>
|
|
#include <gp_Pnt.hxx>
|
|
#include <gp_Vec.hxx>
|
|
#include <math_Vector.hxx>
|
|
|
|
//=======================================================================
|
|
//function : Extrema_FuncPSDist
|
|
//purpose :
|
|
//=======================================================================
|
|
Extrema_FuncPSDist::Extrema_FuncPSDist(const Adaptor3d_Surface& theS,
|
|
const gp_Pnt& theP)
|
|
: mySurf(theS),
|
|
myP(theP)
|
|
{
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : NbVariables
|
|
//purpose :
|
|
//=======================================================================
|
|
Standard_Integer Extrema_FuncPSDist::NbVariables () const
|
|
{
|
|
return 2;
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : Value
|
|
//purpose :
|
|
//=======================================================================
|
|
Standard_Boolean Extrema_FuncPSDist::Value(const math_Vector& X,Standard_Real& F)
|
|
{
|
|
if (!IsInside(X))
|
|
return Standard_False;
|
|
|
|
F = mySurf.Value(X(1), X(2)).SquareDistance(myP);
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : Gradient
|
|
//purpose :
|
|
//=======================================================================
|
|
Standard_Boolean Extrema_FuncPSDist::Gradient(const math_Vector& X,math_Vector& G)
|
|
|
|
{
|
|
if (!IsInside(X))
|
|
return Standard_False;
|
|
|
|
gp_Pnt aP;
|
|
gp_Vec Du1s, Dv1s;
|
|
mySurf.D1(X(1),X(2),aP,Du1s,Dv1s);
|
|
|
|
gp_Vec P1P2 (aP, myP);
|
|
|
|
G(1) = P1P2.Dot(Du1s);
|
|
G(2) = P1P2.Dot(Dv1s);
|
|
|
|
return Standard_True;
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : Values
|
|
//purpose :
|
|
//=======================================================================
|
|
Standard_Boolean Extrema_FuncPSDist::Values(const math_Vector& X,Standard_Real& F,math_Vector& G)
|
|
{
|
|
if (!IsInside(X))
|
|
return Standard_False;
|
|
|
|
gp_Pnt aP;
|
|
gp_Vec Du1s, Dv1s;
|
|
mySurf.D1(X(1),X(2),aP,Du1s,Dv1s);
|
|
|
|
gp_Vec P1P2 (aP, myP);
|
|
|
|
G(1) = P1P2.Dot(Du1s);
|
|
G(2) = P1P2.Dot(Dv1s);
|
|
|
|
F = mySurf.Value(X(1), X(2)).SquareDistance(myP);
|
|
|
|
return true;
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : IsInside
|
|
//purpose :
|
|
//=======================================================================
|
|
Standard_Boolean Extrema_FuncPSDist::IsInside(const math_Vector& X)
|
|
{
|
|
if (X(1) < mySurf.FirstUParameter() ||
|
|
X(1) > mySurf.LastUParameter() ||
|
|
X(2) < mySurf.FirstUParameter() ||
|
|
X(2) > mySurf.LastUParameter() )
|
|
{
|
|
// Point out of borders.
|
|
return Standard_False;
|
|
}
|
|
|
|
// Point is inside.
|
|
return Standard_True;
|
|
}
|