src/AppParCurves/AppParCurves_BSpGradient_BFGS.gxx

   1 // File:        AppParCurves_BSpGradient_BFGS.gxx
   2 // Created:     Thu Dec 16 13:02:58 1999
   3 // Author:      Atelier CAS2000
   4 //              <cas@cageox.paris1.matra-dtv.fr>
   5
   6
   7
   8 // Redefinition de math_BFGS:
   9 // ==========================
  10
  11 AppParCurves_BSpGradient_BFGS::AppParCurves_BSpGradient_BFGS(math_MultipleVarFunctionWithGradient& F,
  12                                                              const math_Vector& StartingPoint,
  13                                                              const Standard_Real Tolerance3d,
  14                                                              const Standard_Real Tolerance2d,
  15                                                              const Standard_Real Eps,
  16                                                              const Standard_Integer NbIterations):
  17        math_BFGS(F, Eps, NbIterations, Eps),
  18        myTol3d(Tolerance3d),
  19        myTol2d(Tolerance2d)
  20 {
  21
  22   Perform(F, StartingPoint);
  23 }
  24
  25 Standard_Boolean AppParCurves_BSpGradient_BFGS::IsSolutionReached(math_MultipleVarFunctionWithGradient& F) const {
  26   Standard_Boolean Result, Result2;
  27   AppParCurves_BSpParFunction *F1 = (AppParCurves_BSpParFunction*) &F;
  28
  29   Result = (2.0 * fabs(TheMinimum - PreviousMinimum) <=
  30             1.e-10 * (fabs(TheMinimum) + fabs(PreviousMinimum))+1.e-12) ;
  31   Standard_Real MErr3d = F1->MaxError3d();
  32   Standard_Real MErr2d = F1->MaxError2d();
  33   Result2 = ((MErr3d <= myTol3d) && (MErr2d <= myTol2d));
  34
  35   return (Result || Result2);
  36 }
  37
  38
  39