0031668: Visualization - WebGL sample doesn't work on Emscripten 1.39
[occt.git] / src / AppParCurves / AppParCurves_BSpGradient_BFGS.gxx
1 // Created on: 1999-12-16
2 // Created by: Atelier CAS2000
3 // Copyright (c) 1999-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
5 //
6 // This file is part of Open CASCADE Technology software library.
7 //
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
13 //
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
16
17 // Redefinition de math_BFGS:
18 // ==========================
19
20 AppParCurves_BSpGradient_BFGS::AppParCurves_BSpGradient_BFGS(math_MultipleVarFunctionWithGradient& F,
21                                                              const math_Vector& StartingPoint,
22                                                              const Standard_Real Tolerance3d,
23                                                              const Standard_Real Tolerance2d,
24                                                              const Standard_Real Eps,
25                                                              const Standard_Integer NbIterations):
26        math_BFGS(F.NbVariables(), Eps, NbIterations, Eps),
27        myTol3d(Tolerance3d),
28        myTol2d(Tolerance2d) 
29 {
30   
31   Perform(F, StartingPoint);
32 }
33
34 Standard_Boolean AppParCurves_BSpGradient_BFGS::IsSolutionReached(math_MultipleVarFunctionWithGradient& F) const {
35   Standard_Boolean Result, Result2;
36   AppParCurves_BSpParFunction *F1 = (AppParCurves_BSpParFunction*) &F;
37   
38   Result = (2.0 * fabs(TheMinimum - PreviousMinimum) <= 
39             1.e-10 * (fabs(TheMinimum) + fabs(PreviousMinimum))+1.e-12) ;
40   Standard_Real MErr3d = F1->MaxError3d();
41   Standard_Real MErr2d = F1->MaxError2d();    
42   Result2 = ((MErr3d <= myTol3d) && (MErr2d <= myTol2d));
43   
44   return (Result || Result2);
45 }
46
47
48