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1 | // Created on: 1992-04-03 |
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 _IntRes2d_Transition_HeaderFile |
18 | #define _IntRes2d_Transition_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <Standard_Boolean.hxx> |
25 | #include <IntRes2d_Position.hxx> |
26 | #include <IntRes2d_TypeTrans.hxx> |
27 | #include <IntRes2d_Situation.hxx> |
28 | class Standard_DomainError; |
29 | |
30 | |
31 | //! Definition of the type of transition near an |
32 | //! intersection point between two curves. The transition |
33 | //! is either a "true transition", which means that one of |
34 | //! the curves goes inside or outside the area defined by |
35 | //! the other curve near the intersection, or a "touch |
36 | //! transition" which means that the first curve does not |
37 | //! cross the other one, or an "undecided" transition, |
38 | //! which means that the curves are superposed. |
39 | class IntRes2d_Transition |
40 | { |
41 | public: |
42 | |
43 | DEFINE_STANDARD_ALLOC |
44 | |
45 | |
46 | //! Empty constructor. |
47 | Standard_EXPORT IntRes2d_Transition(); |
48 | |
49 | //! Creates an IN or OUT transition. |
50 | IntRes2d_Transition(const Standard_Boolean Tangent, const IntRes2d_Position Pos, const IntRes2d_TypeTrans Type); |
51 | |
52 | //! Creates a TOUCH transition. |
53 | IntRes2d_Transition(const Standard_Boolean Tangent, const IntRes2d_Position Pos, const IntRes2d_Situation Situ, const Standard_Boolean Oppos); |
54 | |
55 | //! Creates an UNDECIDED transition. |
56 | IntRes2d_Transition(const IntRes2d_Position Pos); |
57 | |
58 | //! Sets the values of an IN or OUT transition. |
59 | void SetValue (const Standard_Boolean Tangent, const IntRes2d_Position Pos, const IntRes2d_TypeTrans Type); |
60 | |
61 | //! Sets the values of a TOUCH transition. |
62 | void SetValue (const Standard_Boolean Tangent, const IntRes2d_Position Pos, const IntRes2d_Situation Situ, const Standard_Boolean Oppos); |
63 | |
64 | //! Sets the values of an UNDECIDED transition. |
65 | void SetValue (const IntRes2d_Position Pos); |
66 | |
67 | //! Sets the value of the position. |
68 | void SetPosition (const IntRes2d_Position Pos); |
69 | |
70 | //! Indicates if the intersection is at the beginning |
71 | //! (IntRes2d_Head), at the end (IntRes2d_End), or in |
72 | //! the middle (IntRes2d_Middle) of the curve. |
73 | IntRes2d_Position PositionOnCurve() const; |
74 | |
75 | //! Returns the type of transition at the intersection. |
76 | //! It may be IN or OUT or TOUCH, or UNDECIDED if the |
77 | //! two first derivatives are not enough to give |
78 | //! the tangent to one of the two curves. |
79 | IntRes2d_TypeTrans TransitionType() const; |
80 | |
81 | //! Returns TRUE when the 2 curves are tangent at the |
82 | //! intersection point. |
83 | //! Theexception DomainError is raised if the type of |
84 | //! transition is UNDECIDED. |
85 | Standard_Boolean IsTangent() const; |
86 | |
87 | //! returns a significant value if TransitionType returns |
88 | //! TOUCH. In this case, the function returns : |
89 | //! INSIDE when the curve remains inside the other one, |
90 | //! OUTSIDE when it remains outside the other one, |
91 | //! UNKNOWN when the calculus, based on the second derivatives |
92 | //! cannot give the result. |
93 | //! If TransitionType returns IN or OUT or UNDECIDED, the |
94 | //! exception DomainError is raised. |
95 | IntRes2d_Situation Situation() const; |
96 | |
97 | //! returns a significant value if TransitionType |
98 | //! returns TOUCH. In this case, the function returns |
99 | //! true when the 2 curves locally define two |
100 | //! different parts of the space. If TransitionType |
101 | //! returns IN or OUT or UNDECIDED, the exception |
102 | //! DomainError is raised. |
103 | Standard_Boolean IsOpposite() const; |
104 | |
105 | |
106 | |
107 | |
108 | protected: |
109 | |
110 | |
111 | |
112 | |
113 | |
114 | private: |
115 | |
116 | |
117 | |
118 | Standard_Boolean tangent; |
119 | IntRes2d_Position posit; |
120 | IntRes2d_TypeTrans typetra; |
121 | IntRes2d_Situation situat; |
122 | Standard_Boolean oppos; |
123 | |
124 | |
125 | }; |
126 | |
127 | |
128 | #include <IntRes2d_Transition.lxx> |
129 | |
130 | |
131 | |
132 | |
133 | |
134 | #endif // _IntRes2d_Transition_HeaderFile |