OCCT

// Created on: 1991-12-02
// Created by: Laurent PAINNOT
// Copyright (c) 1991-1999 Matra Datavision
// Copyright (c) 1999-2014 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 <AppDef_Gradient_BFGSOfMyGradientbisOfBSplineCompute.hxx>

#include <AppDef_MultiLine.hxx>
#include <AppDef_MyLineTool.hxx>
#include <AppDef_MyGradientbisOfBSplineCompute.hxx>
#include <AppDef_ParLeastSquareOfMyGradientbisOfBSplineCompute.hxx>
#include <AppDef_ResConstraintOfMyGradientbisOfBSplineCompute.hxx>
#include <AppDef_ParFunctionOfMyGradientbisOfBSplineCompute.hxx>
#include <math_MultipleVarFunctionWithGradient.hxx>

AppDef_Gradient_BFGSOfMyGradientbisOfBSplineCompute::
  AppDef_Gradient_BFGSOfMyGradientbisOfBSplineCompute(math_MultipleVarFunctionWithGradient& F,
                                                      const math_Vector& StartingPoint,
                                                      const double       Tolerance3d,
                                                      const double       Tolerance2d,
                                                      const double       Eps,
                                                      const int          NbIterations)
    : math_BFGS(F.NbVariables(), Eps, NbIterations, Eps),
      myTol3d(Tolerance3d),
      myTol2d(Tolerance2d)
{
  Perform(F, StartingPoint);
}

bool AppDef_Gradient_BFGSOfMyGradientbisOfBSplineCompute::IsSolutionReached(
  math_MultipleVarFunctionWithGradient& F) const
{
  AppDef_ParFunctionOfMyGradientbisOfBSplineCompute* F1 =
    (AppDef_ParFunctionOfMyGradientbisOfBSplineCompute*)&F;
  bool Result, Result2;

  Result        = (2.0 * fabs(TheMinimum - PreviousMinimum)
            <= 1.e-10 * (fabs(TheMinimum) + fabs(PreviousMinimum)) + 1.e-12);
  double MErr3d = F1->MaxError3d();
  double MErr2d = F1->MaxError2d();

  Result2 = ((MErr3d <= myTol3d) && (MErr2d <= myTol2d));
  return (Result || Result2);
}