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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_ElementarySurfaceToBSplineSurface_HeaderFile |
18 | #define _Convert_ElementarySurfaceToBSplineSurface_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <TColgp_Array2OfPnt.hxx> |
25 | #include <TColStd_Array2OfReal.hxx> |
26 | #include <TColStd_Array1OfReal.hxx> |
27 | #include <TColStd_Array1OfInteger.hxx> |
28 | #include <Standard_Integer.hxx> |
29 | #include <Standard_Boolean.hxx> |
30 | #include <Standard_Real.hxx> |
31 | class Standard_OutOfRange; |
32 | class gp_Pnt; |
33 | |
34 | |
35 | //! Root class for algorithms which convert an elementary |
36 | //! surface (cylinder, cone, sphere or torus) into a BSpline |
37 | //! surface (CylinderToBSplineSurface, ConeToBSplineSurface, |
38 | //! SphereToBSplineSurface, TorusToBSplineSurface). |
39 | //! These algorithms all work on elementary surfaces from |
40 | //! the gp package and compute all the data needed to |
41 | //! construct a BSpline surface equivalent to the cylinder, |
42 | //! cone, sphere or torus. This data consists of the following: |
43 | //! - degrees in the u and v parametric directions, |
44 | //! - periodic characteristics in the u and v parametric directions, |
45 | //! - a poles table with associated weights, |
46 | //! - a knots table (for the u and v parametric directions) |
47 | //! with associated multiplicities. |
48 | //! The abstract class |
49 | //! ElementarySurfaceToBSplineSurface provides a |
50 | //! framework for storing and consulting this computed data. |
51 | //! This data may then be used to construct a |
52 | //! Geom_BSplineSurface surface, for example. |
53 | //! All those classes define algorithmes to convert an |
54 | //! ElementarySurface into a B-spline surface. |
55 | //! This abstract class implements the methods to get |
56 | //! the geometric representation of the B-spline surface. |
57 | //! The B-spline representation is computed at the creation |
58 | //! time in the sub classes. |
59 | //! The B-spline surface is defined with its degree in the |
60 | //! parametric U and V directions, its control points (Poles), |
61 | //! its weights, its knots and their multiplicity. |
62 | //! KeyWords : |
63 | //! Convert, ElementarySurface, BSplineSurface. |
64 | class Convert_ElementarySurfaceToBSplineSurface |
65 | { |
66 | public: |
67 | |
68 | DEFINE_STANDARD_ALLOC |
69 | |
70 | |
71 | Standard_EXPORT Standard_Integer UDegree() const; |
72 | |
73 | //! Returns the degree for the u or v parametric direction of |
74 | //! the BSpline surface whose data is computed in this framework. |
75 | Standard_EXPORT Standard_Integer VDegree() const; |
76 | |
77 | Standard_EXPORT Standard_Integer NbUPoles() const; |
78 | |
79 | //! Returns the number of poles for the u or v parametric |
80 | //! direction of the BSpline surface whose data is computed in this framework. |
81 | Standard_EXPORT Standard_Integer NbVPoles() const; |
82 | |
83 | Standard_EXPORT Standard_Integer NbUKnots() const; |
84 | |
85 | //! Returns the number of knots for the u or v parametric |
86 | //! direction of the BSpline surface whose data is computed in this framework . |
87 | Standard_EXPORT Standard_Integer NbVKnots() const; |
88 | |
89 | Standard_EXPORT Standard_Boolean IsUPeriodic() const; |
90 | |
91 | //! Returns true if the BSpline surface whose data is computed |
92 | //! in this framework is periodic in the u or v parametric direction. |
93 | Standard_EXPORT Standard_Boolean IsVPeriodic() const; |
94 | |
95 | //! Returns the pole of index (UIndex,VIndex) to the poles |
96 | //! table of the BSpline surface whose data is computed in this framework. |
97 | //! Exceptions |
98 | //! Standard_OutOfRange if, for the BSpline surface whose |
99 | //! data is computed in this framework: |
100 | //! - UIndex is outside the bounds of the poles table in the u |
101 | //! parametric direction, or |
102 | //! - VIndex is outside the bounds of the poles table in the v |
103 | //! parametric direction. |
104 | Standard_EXPORT gp_Pnt Pole (const Standard_Integer UIndex, const Standard_Integer VIndex) const; |
105 | |
106 | //! Returns the weight of the pole of index (UIndex,VIndex) to |
107 | //! the poles table of the BSpline surface whose data is computed in this framework. |
108 | //! Exceptions |
109 | //! Standard_OutOfRange if, for the BSpline surface whose |
110 | //! data is computed in this framework: |
111 | //! - UIndex is outside the bounds of the poles table in the u |
112 | //! parametric direction, or |
113 | //! - VIndex is outside the bounds of the poles table in the v |
114 | //! parametric direction. |
115 | Standard_EXPORT Standard_Real Weight (const Standard_Integer UIndex, const Standard_Integer VIndex) const; |
116 | |
117 | //! Returns the U-knot of range UIndex. |
118 | //! Raised if UIndex < 1 or UIndex > NbUKnots. |
119 | Standard_EXPORT Standard_Real UKnot (const Standard_Integer UIndex) const; |
120 | |
121 | //! Returns the V-knot of range VIndex. |
122 | //! Raised if VIndex < 1 or VIndex > NbVKnots. |
123 | Standard_EXPORT Standard_Real VKnot (const Standard_Integer UIndex) const; |
124 | |
125 | //! Returns the multiplicity of the U-knot of range UIndex. |
126 | //! Raised if UIndex < 1 or UIndex > NbUKnots. |
127 | Standard_EXPORT Standard_Integer UMultiplicity (const Standard_Integer UIndex) const; |
128 | |
129 | //! Returns the multiplicity of the V-knot of range VIndex. |
130 | //! Raised if VIndex < 1 or VIndex > NbVKnots. |
131 | Standard_EXPORT Standard_Integer VMultiplicity (const Standard_Integer VIndex) const; |
132 | |
133 | |
134 | |
135 | |
136 | protected: |
137 | |
138 | |
139 | Standard_EXPORT Convert_ElementarySurfaceToBSplineSurface(const Standard_Integer NumberOfUPoles, const Standard_Integer NumberOfVPoles, const Standard_Integer NumberOfUKnots, const Standard_Integer NumberOfVKnots, const Standard_Integer UDegree, const Standard_Integer VDegree); |
140 | |
141 | |
142 | TColgp_Array2OfPnt poles; |
143 | TColStd_Array2OfReal weights; |
144 | TColStd_Array1OfReal uknots; |
145 | TColStd_Array1OfInteger umults; |
146 | TColStd_Array1OfReal vknots; |
147 | TColStd_Array1OfInteger vmults; |
148 | Standard_Integer udegree; |
149 | Standard_Integer vdegree; |
150 | Standard_Integer nbUPoles; |
151 | Standard_Integer nbVPoles; |
152 | Standard_Integer nbUKnots; |
153 | Standard_Integer nbVKnots; |
154 | Standard_Boolean isuperiodic; |
155 | Standard_Boolean isvperiodic; |
156 | |
157 | |
158 | private: |
159 | |
160 | |
161 | |
162 | |
163 | |
164 | }; |
165 | |
166 | |
167 | |
168 | |
169 | |
170 | |
171 | |
172 | #endif // _Convert_ElementarySurfaceToBSplineSurface_HeaderFile |