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1 | // Created on: 1991-10-10 |
| 2 | // Created by: Jean Claude VAUTHIER |
| 3 | // Copyright (c) 1991-1999 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 _Convert_CircleToBSplineCurve_HeaderFile |
| 18 | #define _Convert_CircleToBSplineCurve_HeaderFile |
| 19 | |
| 20 | #include <Standard.hxx> |
| 21 | #include <Standard_DefineAlloc.hxx> |
| 22 | #include <Standard_Handle.hxx> |
| 23 | |
| 24 | #include <Convert_ConicToBSplineCurve.hxx> |
| 25 | #include <Convert_ParameterisationType.hxx> |
| 26 | #include <Standard_Real.hxx> |
| 27 | class Standard_DomainError; |
| 28 | class gp_Circ2d; |
| 29 | |
| 30 | |
| 31 | |
| 32 | //! This algorithm converts a circle into a rational B-spline curve. |
| 33 | //! The circle is a Circ2d from package gp and its parametrization is : |
| 34 | //! P (U) = Loc + R * (Cos(U) * Xdir + Sin(U) * YDir) where Loc is the |
| 35 | //! center of the circle Xdir and Ydir are the normalized directions |
| 36 | //! of the local cartesian coordinate system of the circle. |
| 37 | //! The parametrization range for the circle is U [0, 2Pi]. |
| 38 | //! |
| 39 | //! Warnings : |
| 40 | //! The parametrization range for the B-spline curve is not [0, 2Pi]. |
| 41 | //! |
| 42 | //! KeyWords : |
| 43 | //! Convert, Circle, BSplineCurve, 2D . |
| 44 | class Convert_CircleToBSplineCurve : public Convert_ConicToBSplineCurve |
| 45 | { |
| 46 | public: |
| 47 | |
| 48 | DEFINE_STANDARD_ALLOC |
| 49 | |
| 50 | |
| 51 | |
| 52 | //! The equivalent B-spline curve has the same orientation |
| 53 | //! as the circle C. |
| 54 | Standard_EXPORT Convert_CircleToBSplineCurve(const gp_Circ2d& C, const Convert_ParameterisationType Parameterisation = Convert_TgtThetaOver2); |
| 55 | |
| 56 | |
| 57 | //! The circle C is limited between the parametric values U1, U2 |
| 58 | //! in radians. U1 and U2 [0.0, 2*Pi] . |
| 59 | //! The equivalent B-spline curve is oriented from U1 to U2 and has |
| 60 | //! the same orientation as the circle C. |
| 61 | //! |
| 62 | //! Raised if U1 = U2 or U1 = U2 + 2.0 * Pi |
| 63 | Standard_EXPORT Convert_CircleToBSplineCurve(const gp_Circ2d& C, const Standard_Real U1, const Standard_Real U2, const Convert_ParameterisationType Parameterisation = Convert_TgtThetaOver2); |
| 64 | |
| 65 | |
| 66 | |
| 67 | |
| 68 | protected: |
| 69 | |
| 70 | |
| 71 | |
| 72 | |
| 73 | |
| 74 | private: |
| 75 | |
| 76 | |
| 77 | |
| 78 | |
| 79 | |
| 80 | }; |
| 81 | |
| 82 | |
| 83 | |
| 84 | |
| 85 | |
| 86 | |
| 87 | |
| 88 | #endif // _Convert_CircleToBSplineCurve_HeaderFile |
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