// File:	AppParCurves_Gradient_BFGS.gxx
// Created:	Thu Dec 16 13:09:24 1999
// Author:	Atelier CAS2000
//		<cas@cageox.paris1.matra-dtv.fr>
//-Copyright:	 Matra Datavision 1999


// Redefinition de math_BFGS:
// ==========================


AppParCurves_Gradient_BFGS::AppParCurves_Gradient_BFGS(math_MultipleVarFunctionWithGradient& F,
						       const math_Vector& StartingPoint,
						       const Standard_Real Tolerance3d,
						       const Standard_Real Tolerance2d,
						       const Standard_Real Eps,
						       const Standard_Integer NbIterations ):
       math_BFGS(F, Eps, NbIterations, Eps),
       myTol3d(Tolerance3d),
       myTol2d(Tolerance2d) 
{
  Perform(F, StartingPoint);
}

Standard_Boolean AppParCurves_Gradient_BFGS::IsSolutionReached(math_MultipleVarFunctionWithGradient& F) const 
{
    AppParCurves_ParFunction *F1 = (AppParCurves_ParFunction*) &F;
    Standard_Boolean Result, Result2;

    Result = (2.0 * fabs(TheMinimum - PreviousMinimum) <= 
	1.e-10 * (fabs(TheMinimum) + fabs(PreviousMinimum))+1.e-12);
    Standard_Real MErr3d = F1->MaxError3d();
    Standard_Real MErr2d = F1->MaxError2d();
    
    Result2 = ((MErr3d <= myTol3d) && (MErr2d <= myTol2d));
    return (Result || Result2);
  }