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1 | // Created on: 1993-01-09 |
2 | // Created by: CKY / Contract Toubro-Larsen ( Kiran ) |
3 | // Copyright (c) 1993-1999 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 _IGESGeom_CircularArc_HeaderFile |
18 | #define _IGESGeom_CircularArc_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_Type.hxx> |
22 | |
23 | #include <Standard_Real.hxx> |
24 | #include <gp_XY.hxx> |
25 | #include <IGESData_IGESEntity.hxx> |
26 | #include <Standard_Boolean.hxx> |
27 | class gp_XY; |
28 | class gp_Pnt2d; |
29 | class gp_Pnt; |
30 | class gp_Dir; |
31 | |
32 | |
33 | class IGESGeom_CircularArc; |
34 | DEFINE_STANDARD_HANDLE(IGESGeom_CircularArc, IGESData_IGESEntity) |
35 | |
36 | //! defines IGESCircularArc, Type <100> Form <0> |
37 | //! in package IGESGeom |
38 | //! A circular arc is a connected portion of a parent circle |
39 | //! which consists of more than one point. The definition space |
40 | //! coordinate system is always chosen so that the circular arc |
41 | //! remains in a plane either coincident with or parallel to |
42 | //! the XT, YT plane. |
43 | class IGESGeom_CircularArc : public IGESData_IGESEntity |
44 | { |
45 | |
46 | public: |
47 | |
48 | |
49 | Standard_EXPORT IGESGeom_CircularArc(); |
50 | |
51 | //! This method is used to set the fields of the class |
52 | //! CircularArc |
53 | //! - aZT : Shift above the Z plane |
54 | //! - aCenter : Center of the circle of which the arc forms a part |
55 | //! - aStart : Starting point of the circular arc |
56 | //! - anEnd : Ending point of the circular arc |
57 | Standard_EXPORT void Init (const Standard_Real aZT, const gp_XY& aCenter, const gp_XY& aStart, const gp_XY& anEnd); |
58 | |
59 | //! returns the center of the circle of which arc forms a part |
60 | Standard_EXPORT gp_Pnt2d Center() const; |
61 | |
62 | //! returns the center of the circle of which arc forms a part |
63 | //! after applying Transf. Matrix |
64 | Standard_EXPORT gp_Pnt TransformedCenter() const; |
65 | |
66 | //! returns the start point of the arc |
67 | Standard_EXPORT gp_Pnt2d StartPoint() const; |
68 | |
69 | //! returns the start point of the arc after applying Transf. Matrix |
70 | Standard_EXPORT gp_Pnt TransformedStartPoint() const; |
71 | |
72 | //! returns the parallel displacement of the plane containing the |
73 | //! arc from the XT, YT plane |
74 | Standard_EXPORT Standard_Real ZPlane() const; |
75 | |
76 | //! returns the end point of the arc |
77 | Standard_EXPORT gp_Pnt2d EndPoint() const; |
78 | |
79 | //! returns the end point of the arc after applying Transf. Matrix |
80 | Standard_EXPORT gp_Pnt TransformedEndPoint() const; |
81 | |
82 | //! returns the radius of the circle of which arc forms a part |
83 | Standard_EXPORT Standard_Real Radius() const; |
84 | |
85 | //! returns the angle subtended by the arc at the center in radians |
86 | Standard_EXPORT Standard_Real Angle() const; |
87 | |
88 | //! Z-Axis of circle (i.e. [0,0,1]) |
89 | Standard_EXPORT gp_Dir Axis() const; |
90 | |
91 | //! Z-Axis after applying Trans. Matrix |
92 | Standard_EXPORT gp_Dir TransformedAxis() const; |
93 | |
94 | //! True if StartPoint = EndPoint |
95 | Standard_EXPORT Standard_Boolean IsClosed() const; |
96 | |
97 | |
98 | |
99 | |
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100 | DEFINE_STANDARD_RTTIEXT(IGESGeom_CircularArc,IGESData_IGESEntity) |
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101 | |
102 | protected: |
103 | |
104 | |
105 | |
106 | |
107 | private: |
108 | |
109 | |
110 | Standard_Real theZT; |
111 | gp_XY theCenter; |
112 | gp_XY theStart; |
113 | gp_XY theEnd; |
114 | |
115 | |
116 | }; |
117 | |
118 | |
119 | |
120 | |
121 | |
122 | |
123 | |
124 | #endif // _IGESGeom_CircularArc_HeaderFile |