1 -- Created on: 1994-09-02
2 -- Created by: Yves FRICAUD
3 -- Copyright (c) 1994-1999 Matra Datavision
4 -- Copyright (c) 1999-2014 OPEN CASCADE SAS
6 -- This file is part of Open CASCADE Technology software library.
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.
14 -- Alternatively, this file may be used under the terms of Open CASCADE
15 -- commercial license or contractual agreement.
17 private class FuncCurExt from Geom2dLProp inherits FunctionWithDerivative from math
18 ---Purpose: Function used to find the extremas of curvature in 2d.
20 uses Curve from Geom2d,
24 Curve2dTool from Geom2dLProp
27 Create ( C : Curve from Geom2d ; Tol : Real) returns FuncCurExt from Geom2dLProp;
29 Value (me : in out; X : Real; F : out Real)
30 ---Purpose: Returns the value for the variable <X>.
33 Derivative (me : in out; X : Real; D : out Real)
34 ---Purpose: Returns the derivative for the variable <X>.
37 Values (me : in out ; X : Real; F : out Real; D : out Real)
38 ---Purpose: Returns the value of the function and the derivative
39 -- for the variable <X>.
42 IsMinKC (me ; Param : Real)
43 ---Purpose: True if Param corresponds to a minus
44 -- of the radius of curvature.
48 theCurve : Curve from Geom2d;
49 epsX : Real from Standard;