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1 | -- Created on: 1994-09-02 |
2 | -- Created by: Yves FRICAUD |
3 | -- Copyright (c) 1994-1999 Matra Datavision |
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4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | -- |
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6 | -- This file is part of Open CASCADE Technology software library. |
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7 | -- |
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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 |
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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. |
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13 | -- |
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14 | -- Alternatively, this file may be used under the terms of Open CASCADE |
15 | -- commercial license or contractual agreement. |
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16 | |
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17 | private class FuncCurExt from Geom2dLProp inherits FunctionWithDerivative from math |
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18 | ---Purpose: Function used to find the extremas of curvature in 2d. |
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19 | |
20 | uses Curve from Geom2d, |
21 | Vec2d from gp, |
22 | Pnt2d from gp, |
23 | Dir2d from gp, |
24 | Curve2dTool from Geom2dLProp |
25 | |
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26 | is |
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27 | Create ( C : Curve from Geom2d ; Tol : Real) returns FuncCurExt from Geom2dLProp; |
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28 | |
29 | Value (me : in out; X : Real; F : out Real) |
30 | ---Purpose: Returns the value for the variable <X>. |
31 | returns Boolean; |
32 | |
33 | Derivative (me : in out; X : Real; D : out Real) |
34 | ---Purpose: Returns the derivative for the variable <X>. |
35 | returns Boolean; |
36 | |
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>. |
40 | returns Boolean; |
41 | |
42 | IsMinKC (me ; Param : Real) |
43 | ---Purpose: True if Param corresponds to a minus |
44 | -- of the radius of curvature. |
45 | returns Boolean; |
46 | |
47 | fields |
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48 | theCurve : Curve from Geom2d; |
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49 | epsX : Real from Standard; |
50 | |
51 | end FuncCurExt; |
52 | |