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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_ConicToBSplineCurve_HeaderFile |
18 | #define _Convert_ConicToBSplineCurve_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <TColgp_HArray1OfPnt2d.hxx> |
25 | #include <TColStd_HArray1OfReal.hxx> |
26 | #include <TColStd_HArray1OfInteger.hxx> |
27 | #include <Standard_Integer.hxx> |
28 | #include <Standard_Boolean.hxx> |
29 | #include <Standard_Real.hxx> |
30 | #include <Convert_ParameterisationType.hxx> |
31 | class Standard_OutOfRange; |
32 | class Standard_ConstructionError; |
33 | class gp_Pnt2d; |
34 | |
35 | |
36 | //! Root class for algorithms which convert a conic curve into |
37 | //! a BSpline curve (CircleToBSplineCurve, EllipseToBSplineCurve, |
38 | //! HyperbolaToBSplineCurve, ParabolaToBSplineCurve). |
39 | //! These algorithms all work on 2D curves from the gp |
40 | //! package and compute all the data needed to construct a |
41 | //! BSpline curve equivalent to the conic curve. This data consists of: |
42 | //! - the degree of the curve, |
43 | //! - the periodic characteristics of the curve, |
44 | //! - a poles table with associated weights, |
45 | //! - a knots table with associated multiplicities. |
46 | //! The abstract class ConicToBSplineCurve provides a |
47 | //! framework for storing and consulting this computed data. |
48 | //! The data may then be used to construct a |
49 | //! Geom2d_BSplineCurve curvSuper class of the following classes : |
50 | //! This abstract class implements the methods to get the geometric |
51 | //! representation of the B-spline curve equivalent to the conic. |
52 | //! The B-spline is computed at the creation time in the sub classes. |
53 | //! The B-spline curve is defined with its degree, its control points |
54 | //! (Poles), its weights, its knots and their multiplicity. |
55 | //! All the geometric entities used in this package are defined in 2D |
56 | //! space. |
57 | //! KeyWords : |
58 | //! Convert, Conic, BSplineCurve, 2D. |
59 | class Convert_ConicToBSplineCurve |
60 | { |
61 | public: |
62 | |
63 | DEFINE_STANDARD_ALLOC |
64 | |
65 | |
66 | //! Returns the degree of the BSpline curve whose data is |
67 | //! computed in this framework. |
68 | Standard_EXPORT Standard_Integer Degree() const; |
69 | |
70 | //! Returns the number of poles of the BSpline curve whose |
71 | //! data is computed in this framework. |
72 | Standard_EXPORT Standard_Integer NbPoles() const; |
73 | |
74 | //! Returns the number of knots of the BSpline curve whose |
75 | //! data is computed in this framework. |
76 | Standard_EXPORT Standard_Integer NbKnots() const; |
77 | |
78 | //! Returns true if the BSpline curve whose data is computed in |
79 | //! this framework is periodic. |
80 | Standard_EXPORT Standard_Boolean IsPeriodic() const; |
81 | |
82 | //! Returns the pole of index Index to the poles table of the |
83 | //! BSpline curve whose data is computed in this framework. |
84 | //! Exceptions |
85 | //! Standard_OutOfRange if Index is outside the bounds of |
86 | //! the poles table of the BSpline curve whose data is computed in this framework. |
87 | Standard_EXPORT gp_Pnt2d Pole (const Standard_Integer Index) const; |
88 | |
89 | //! Returns the weight of the pole of index Index to the poles |
90 | //! table of the BSpline curve whose data is computed in this framework. |
91 | //! Exceptions |
92 | //! Standard_OutOfRange if Index is outside the bounds of |
93 | //! the poles table of the BSpline curve whose data is computed in this framework. |
94 | Standard_EXPORT Standard_Real Weight (const Standard_Integer Index) const; |
95 | |
96 | //! Returns the knot of index Index to the knots table of the |
97 | //! BSpline curve whose data is computed in this framework. |
98 | //! Exceptions |
99 | //! Standard_OutOfRange if Index is outside the bounds of |
100 | //! the knots table of the BSpline curve whose data is computed in this framework. |
101 | Standard_EXPORT Standard_Real Knot (const Standard_Integer Index) const; |
102 | |
103 | //! Returns the multiplicity of the knot of index Index to the |
104 | //! knots table of the BSpline curve whose data is computed in this framework. |
105 | //! Exceptions |
106 | //! Standard_OutOfRange if Index is outside the bounds of |
107 | //! the knots table of the BSpline curve whose data is computed in this framework. |
108 | Standard_EXPORT Standard_Integer Multiplicity (const Standard_Integer Index) const; |
109 | |
110 | Standard_EXPORT void BuildCosAndSin (const Convert_ParameterisationType Parametrisation, Handle(TColStd_HArray1OfReal)& CosNumerator, Handle(TColStd_HArray1OfReal)& SinNumerator, Handle(TColStd_HArray1OfReal)& Denominator, Standard_Integer& Degree, Handle(TColStd_HArray1OfReal)& Knots, Handle(TColStd_HArray1OfInteger)& Mults) const; |
111 | |
112 | Standard_EXPORT void BuildCosAndSin (const Convert_ParameterisationType Parametrisation, const Standard_Real UFirst, const Standard_Real ULast, Handle(TColStd_HArray1OfReal)& CosNumerator, Handle(TColStd_HArray1OfReal)& SinNumerator, Handle(TColStd_HArray1OfReal)& Denominator, Standard_Integer& Degree, Handle(TColStd_HArray1OfReal)& Knots, Handle(TColStd_HArray1OfInteger)& Mults) const; |
113 | |
114 | |
115 | |
116 | |
117 | protected: |
118 | |
119 | |
120 | Standard_EXPORT Convert_ConicToBSplineCurve(const Standard_Integer NumberOfPoles, const Standard_Integer NumberOfKnots, const Standard_Integer Degree); |
121 | |
122 | |
123 | Handle(TColgp_HArray1OfPnt2d) poles; |
124 | Handle(TColStd_HArray1OfReal) weights; |
125 | Handle(TColStd_HArray1OfReal) knots; |
126 | Handle(TColStd_HArray1OfInteger) mults; |
127 | Standard_Integer degree; |
128 | Standard_Integer nbPoles; |
129 | Standard_Integer nbKnots; |
130 | Standard_Boolean isperiodic; |
131 | |
132 | |
133 | private: |
134 | |
135 | |
136 | |
137 | |
138 | |
139 | }; |
140 | |
141 | |
142 | |
143 | |
144 | |
145 | |
146 | |
147 | #endif // _Convert_ConicToBSplineCurve_HeaderFile |