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1 | // Created on: 1997-08-26 |
2 | // Created by: Stepan MISHIN |
3 | // Copyright (c) 1997-1999 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 _GeomConvert_ApproxSurface_HeaderFile |
18 | #define _GeomConvert_ApproxSurface_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <Standard_Boolean.hxx> |
25 | #include <Standard_Real.hxx> |
26 | #include <GeomAbs_Shape.hxx> |
27 | #include <Standard_Integer.hxx> |
28 | #include <Standard_OStream.hxx> |
29 | class Geom_BSplineSurface; |
30 | class Standard_OutOfRange; |
31 | class Geom_Surface; |
32 | class Adaptor3d_HSurface; |
33 | |
34 | |
35 | //! A framework to convert a surface to a BSpline |
36 | //! surface. This is done by approximation to a BSpline |
37 | //! surface within a given tolerance. |
38 | class GeomConvert_ApproxSurface |
39 | { |
40 | public: |
41 | |
42 | DEFINE_STANDARD_ALLOC |
43 | |
44 | |
45 | //! Constructs a surface approximation framework defined by |
46 | //! - the conic Surf |
47 | //! - the tolerance value Tol3d |
48 | //! - the degree of continuity UContinuity, VContinuity |
49 | //! in the directions of the U and V parameters |
50 | //! - the highest degree MaxDegU, MaxDegV which |
51 | //! the polynomial defining the BSpline curve may |
52 | //! have in the directions of the U and V parameters |
53 | //! - the maximum number of segments MaxSegments |
54 | //! allowed in the resulting BSpline curve |
55 | //! - the index of precision PrecisCode. |
56 | Standard_EXPORT GeomConvert_ApproxSurface(const Handle(Geom_Surface)& Surf, const Standard_Real Tol3d, const GeomAbs_Shape UContinuity, const GeomAbs_Shape VContinuity, const Standard_Integer MaxDegU, const Standard_Integer MaxDegV, const Standard_Integer MaxSegments, const Standard_Integer PrecisCode); |
57 | |
58 | //! Constructs a surface approximation framework defined by |
59 | //! - the Surf |
60 | //! - the tolerance value Tol3d |
61 | //! - the degree of continuity UContinuity, VContinuity |
62 | //! in the directions of the U and V parameters |
63 | //! - the highest degree MaxDegU, MaxDegV which |
64 | //! the polynomial defining the BSpline curve may |
65 | //! have in the directions of the U and V parameters |
66 | //! - the maximum number of segments MaxSegments |
67 | //! allowed in the resulting BSpline curve |
68 | //! - the index of precision PrecisCode. |
69 | Standard_EXPORT GeomConvert_ApproxSurface(const Handle(Adaptor3d_HSurface)& Surf, const Standard_Real Tol3d, const GeomAbs_Shape UContinuity, const GeomAbs_Shape VContinuity, const Standard_Integer MaxDegU, const Standard_Integer MaxDegV, const Standard_Integer MaxSegments, const Standard_Integer PrecisCode); |
70 | |
71 | //! Returns the BSpline surface resulting from the approximation algorithm. |
72 | Standard_EXPORT Handle(Geom_BSplineSurface) Surface() const; |
73 | |
74 | //! Returns Standard_True if the approximation has be done |
75 | Standard_EXPORT Standard_Boolean IsDone() const; |
76 | |
77 | //! Returns true if the approximation did come out with a result that |
78 | //! is not NECESSARILY within the required tolerance or a result |
79 | //! that is not recognized with the wished continuities. |
80 | Standard_EXPORT Standard_Boolean HasResult() const; |
81 | |
82 | //! Returns the greatest distance between a point on the |
83 | //! source conic surface and the BSpline surface |
84 | //! resulting from the approximation (>0 when an approximation |
85 | //! has been done, 0 if no approximation ) |
86 | Standard_EXPORT Standard_Real MaxError() const; |
87 | |
88 | //! Prints on the stream o informations on the current state of the object. |
89 | Standard_EXPORT void Dump (Standard_OStream& o) const; |
90 | |
91 | |
92 | |
93 | |
94 | protected: |
95 | |
96 | |
97 | |
98 | |
99 | |
100 | private: |
101 | |
102 | |
103 | //! Converts a surface to B-spline |
104 | Standard_EXPORT void Approximate (const Handle(Adaptor3d_HSurface)& theSurf, const Standard_Real theTol3d, const GeomAbs_Shape theUContinuity, const GeomAbs_Shape theVContinuity, const Standard_Integer theMaxDegU, const Standard_Integer theMaxDegV, const Standard_Integer theMaxSegments, const Standard_Integer thePrecisCode); |
105 | |
106 | |
107 | Standard_Boolean myIsDone; |
108 | Standard_Boolean myHasResult; |
109 | Handle(Geom_BSplineSurface) myBSplSurf; |
110 | Standard_Real myMaxError; |
111 | |
112 | |
113 | }; |
114 | |
115 | |
116 | |
117 | |
118 | |
119 | |
120 | |
121 | #endif // _GeomConvert_ApproxSurface_HeaderFile |