1 -- Created on: 1992-10-13
2 -- Created by: Laurent BUCHARD
3 -- Copyright (c) 1992-1999 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
9 -- under the terms of the GNU Lesser General Public 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 ProjectOnPConicTool from IntCurve
19 ---Purpose: This class provides a tool which computes the parameter
20 -- of a point near a parametric conic.
26 FindParameter(myclass; C: PConic from IntCurve;
28 Tol: Real from Standard)
30 --- Purpose: Returns the parameter V of the point on the
31 -- parametric curve corresponding to the Point Pnt. The
32 -- Correspondance between Pnt and the point P(V) on the
33 -- parametric curve must be coherent with the way of
34 -- determination of the signed distance between a point and
35 -- the implicit curve. Tol is the tolerance on the distance
36 -- between a point and the parametrised curve. In that case,
37 -- no bounds are given. The research of the rigth parameter
38 -- has to be made on the natural parametric domain of the
41 returns Real from Standard;
44 FindParameter(myclass; C: PConic from IntCurve;
46 LowParameter,HighParameter,Tol: Real from Standard)
48 --- Purpose: Returns the parameter V of the point on the
49 -- parametric curve corresponding to the Point Pnt. The
50 -- Correspondance between Pnt and the point P(V) on the
51 -- parametric curve must be coherent with the way of
52 -- determination of the signed distance between a point and
53 -- the implicit curve. Tol is the tolerance on the distance
54 -- between a point and the parametrised curve. LowParameter
55 -- and HighParameter give the boundaries of the interval in
56 -- wich the parameter certainly lies. These parameters are
57 -- given to implement a more efficient algoritm. So, it is
58 -- not necessary to check that the returned value verifies
59 -- LowParameter <= Value <= HighParameter.
61 returns Real from Standard;
63 end ProjectOnPConicTool;