1 // Created on: 1992-03-04 2 // Created by: Laurent BUCHARD 3 // Copyright (c) 1992-1999 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 #ifndef _IntCurve_PConic_HeaderFile 18 #define _IntCurve_PConic_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_DefineAlloc.hxx> 22 #include <Standard_Handle.hxx> 23 24 #include <gp_Ax22d.hxx> 25 #include <Standard_Real.hxx> 26 #include <Standard_Integer.hxx> 27 #include <GeomAbs_CurveType.hxx> 28 class gp_Elips2d; 29 class gp_Circ2d; 30 class gp_Parab2d; 31 class gp_Hypr2d; 32 class gp_Lin2d; 33 class gp_Ax22d; 34 35 36 //! This class represents a conic from gp as a 37 //! parametric curve ( in order to be used by the 38 //! class PConicTool from IntCurve). 39 class IntCurve_PConic 40 { 41 public: 42 43 DEFINE_STANDARD_ALLOC 44 45 46 Standard_EXPORT IntCurve_PConic(const IntCurve_PConic& PC); 47 48 Standard_EXPORT IntCurve_PConic(const gp_Elips2d& E); 49 50 Standard_EXPORT IntCurve_PConic(const gp_Circ2d& C); 51 52 Standard_EXPORT IntCurve_PConic(const gp_Parab2d& P); 53 54 Standard_EXPORT IntCurve_PConic(const gp_Hypr2d& H); 55 56 Standard_EXPORT IntCurve_PConic(const gp_Lin2d& L); 57 58 //! EpsX is a internal tolerance used in math 59 //! algorithms, usually about 1e-10 60 //! (See FunctionAllRoots for more details) 61 Standard_EXPORT void SetEpsX (const Standard_Real EpsDist); 62 63 //! Accuracy is the number of samples used to 64 //! approximate the parametric curve on its domain. 65 Standard_EXPORT void SetAccuracy (const Standard_Integer Nb); 66 67 Standard_Integer Accuracy() const; 68 69 Standard_Real EpsX() const; 70 71 //! The Conics are manipulated as objects which only 72 //! depend on three parameters : Axis and two Real from Standards. 73 //! Type Curve is used to select the correct Conic. 74 GeomAbs_CurveType TypeCurve() const; 75 76 const gp_Ax22d& Axis2() const; 77 78 Standard_Real Param1() const; 79 80 Standard_Real Param2() const; 81 82 83 84 85 protected: 86 87 88 89 90 91 private: 92 93 94 95 gp_Ax22d axe; 96 Standard_Real prm1; 97 Standard_Real prm2; 98 Standard_Real TheEpsX; 99 Standard_Integer TheAccuracy; 100 GeomAbs_CurveType type; 101 102 103 }; 104 105 106 #include <IntCurve_PConic.lxx> 107 108 109 110 111 112 #endif // _IntCurve_PConic_HeaderFile 113