include/opencascade/IntCurve_IConicTool.hxx

0001 // Created on: 1992-03-26
0002 // Created by: Laurent BUCHARD
0003 // Copyright (c) 1992-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _IntCurve_IConicTool_HeaderFile
0018 #define _IntCurve_IConicTool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022
0023 #include <gp_Ax22d.hxx>
0024 #include <GeomAbs_CurveType.hxx>
0025 #include <gp_Trsf2d.hxx>
0026 class gp_Elips2d;
0027 class gp_Lin2d;
0028 class gp_Circ2d;
0029 class gp_Parab2d;
0030 class gp_Hypr2d;
0031 class gp_Pnt2d;
0032 class gp_Vec2d;
0033
0034
0035 //! Implementation of the ImpTool from IntImpParGen
0036 //! for conics of gp.
0037 class IntCurve_IConicTool
0038 {
0039 public:
0040
0041   DEFINE_STANDARD_ALLOC
0042
0043
0044   Standard_EXPORT IntCurve_IConicTool();
0045
0046   Standard_EXPORT IntCurve_IConicTool(const IntCurve_IConicTool& IT);
0047
0048   Standard_EXPORT IntCurve_IConicTool(const gp_Elips2d& E);
0049
0050   Standard_EXPORT IntCurve_IConicTool(const gp_Lin2d& L);
0051
0052   Standard_EXPORT IntCurve_IConicTool(const gp_Circ2d& C);
0053
0054   Standard_EXPORT IntCurve_IConicTool(const gp_Parab2d& P);
0055
0056   Standard_EXPORT IntCurve_IConicTool(const gp_Hypr2d& H);
0057
0058   Standard_EXPORT gp_Pnt2d Value (const Standard_Real X) const;
0059
0060   Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T) const;
0061
0062   Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T, gp_Vec2d& N) const;
0063
0064   //! Computes the value of the signed  distance between
0065   //! the point P and the implicit curve.
0066   Standard_EXPORT Standard_Real Distance (const gp_Pnt2d& P) const;
0067
0068   //! Computes  the   Gradient  of  the  Signed Distance
0069   //! between  a  point and  the  implicit curve, at the
0070   //! point P.
0071   Standard_EXPORT gp_Vec2d GradDistance (const gp_Pnt2d& P) const;
0072
0073   //! Returns the parameter U of the point on the implicit curve corresponding to the point P.
0074   //! The correspondence between P and the point P(U) on the
0075   //! implicit curve must be coherent with the way of determination of the signed distance.
0076   Standard_EXPORT Standard_Real FindParameter (const gp_Pnt2d& P) const;
0077
0078 private:
0079
0080   Standard_Real prm1;
0081   Standard_Real prm2;
0082   Standard_Real prm3;
0083   gp_Ax22d Axis;
0084   GeomAbs_CurveType type;
0085   gp_Trsf2d Abs_To_Object;
0086
0087 };
0088
0089 #endif // _IntCurve_IConicTool_HeaderFile