| 42cf5bc1 |
1 | // Created on: 1992-08-26 |
| 2 | // Created by: Remi GILET |
| 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 _gce_MakeElips_HeaderFile |
| 18 | #define _gce_MakeElips_HeaderFile |
| 19 | |
| 20 | #include <Standard.hxx> |
| 21 | #include <Standard_DefineAlloc.hxx> |
| 22 | #include <Standard_Handle.hxx> |
| 23 | |
| 24 | #include <gp_Elips.hxx> |
| 25 | #include <gce_Root.hxx> |
| 26 | #include <Standard_Real.hxx> |
| 27 | class StdFail_NotDone; |
| 28 | class gp_Ax2; |
| 29 | class gp_Pnt; |
| 30 | class gp_Elips; |
| 31 | |
| 32 | |
| 33 | //! This class implements the following algorithms used to |
| 34 | //! create an ellipse from gp. |
| 35 | //! |
| 36 | //! * Create an ellipse from its center, and two points: |
| 37 | //! one on the ciconference giving the major radius, the |
| 38 | //! other giving the value of the small radius. |
| 39 | class gce_MakeElips : public gce_Root |
| 40 | { |
| 41 | public: |
| 42 | |
| 43 | DEFINE_STANDARD_ALLOC |
| 44 | |
| 45 | |
| 46 | //! The major radius of the ellipse is on the "XAxis" and the |
| 47 | //! minor radius is on the "YAxis" of the ellipse. The "XAxis" |
| 48 | //! is defined with the "XDirection" of A2 and the "YAxis" is |
| 49 | //! defined with the "YDirection" of A2. |
| 50 | //! Warnings : |
| 51 | //! It is not forbidden to create an ellipse with |
| 52 | //! MajorRadius = MinorRadius. |
| 53 | Standard_EXPORT gce_MakeElips(const gp_Ax2& A2, const Standard_Real MajorRadius, const Standard_Real MinorRadius); |
| 54 | |
| 55 | //! Make an ellipse with its center and two points. |
| 56 | //! Warning |
| 57 | //! The MakeElips class does not prevent the |
| 58 | //! construction of an ellipse where the MajorRadius is |
| 59 | //! equal to the MinorRadius. |
| 60 | //! If an error occurs (that is, when IsDone returns |
| 61 | //! false), the Status function returns: |
| 62 | //! - gce_InvertRadius if MajorRadius is less than MinorRadius; |
| 63 | //! - gce_NegativeRadius if MinorRadius is less than 0.0; |
| 64 | //! - gce_NullAxis if the points S1 and Center are coincident; or |
| 65 | //! - gce_InvertAxis if: |
| 66 | //! - the major radius computed with Center and S1 |
| 67 | //! is less than the minor radius computed with Center, S1 and S2, or |
| 68 | //! - Center, S1 and S2 are collinear. |
| 69 | Standard_EXPORT gce_MakeElips(const gp_Pnt& S1, const gp_Pnt& S2, const gp_Pnt& Center); |
| 70 | |
| 71 | //! Returns the constructed ellipse. |
| 72 | //! Exceptions StdFail_NotDone if no ellipse is constructed. |
| 73 | Standard_EXPORT const gp_Elips& Value() const; |
| 74 | |
| 75 | Standard_EXPORT const gp_Elips& Operator() const; |
| 76 | Standard_EXPORT operator gp_Elips() const; |
| 77 | |
| 78 | |
| 79 | |
| 80 | |
| 81 | protected: |
| 82 | |
| 83 | |
| 84 | |
| 85 | |
| 86 | |
| 87 | private: |
| 88 | |
| 89 | |
| 90 | |
| 91 | gp_Elips TheElips; |
| 92 | |
| 93 | |
| 94 | }; |
| 95 | |
| 96 | |
| 97 | |
| 98 | |
| 99 | |
| 100 | |
| 101 | |
| 102 | #endif // _gce_MakeElips_HeaderFile |
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