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1 | // Created on: 1995-10-13 |
2 | // Created by: Laurent BOURESCHE |
3 | // Copyright (c) 1995-1999 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 _GeomFill_ConstrainedFilling_HeaderFile |
18 | #define _GeomFill_ConstrainedFilling_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <Standard_Integer.hxx> |
25 | #include <Standard_Real.hxx> |
26 | #include <GeomFill_CornerState.hxx> |
27 | #include <gp_Vec.hxx> |
28 | #include <Standard_Boolean.hxx> |
29 | #include <TColgp_HArray1OfPnt.hxx> |
30 | #include <TColStd_HArray1OfInteger.hxx> |
31 | #include <TColStd_HArray1OfReal.hxx> |
32 | #include <TColgp_HArray2OfPnt.hxx> |
33 | class GeomFill_CoonsAlgPatch; |
34 | class GeomFill_TgtField; |
35 | class Geom_BSplineSurface; |
36 | class GeomFill_Boundary; |
37 | class GeomFill_BoundWithSurf; |
38 | |
39 | |
40 | //! An algorithm for constructing a BSpline surface filled |
41 | //! from a series of boundaries which serve as path |
42 | //! constraints and optionally, as tangency constraints. |
43 | //! The algorithm accepts three or four curves as the |
44 | //! boundaries of the target surface. |
45 | //! The only FillingStyle used is Coons. |
46 | //! A ConstrainedFilling object provides a framework for: |
47 | //! - defining the boundaries of the surface |
48 | //! - implementing the construction algorithm |
49 | //! - consulting the result. |
50 | //! Warning |
51 | //! This surface filling algorithm is specifically designed to |
52 | //! be used in connection with fillets. Satisfactory results |
53 | //! cannot be guaranteed for other uses. |
54 | class GeomFill_ConstrainedFilling |
55 | { |
56 | public: |
57 | |
58 | DEFINE_STANDARD_ALLOC |
59 | |
60 | |
61 | |
62 | //! Constructs an empty framework for filling a surface from boundaries. |
63 | //! The boundaries of the surface will be defined, and the |
64 | //! surface will be built by using the function Init. |
65 | //! The surface will respect the following constraints: |
66 | //! - its degree will not be greater than MaxDeg |
67 | //! - the maximum number of segments MaxSeg which |
68 | //! BSpline surfaces can have. |
69 | Standard_EXPORT GeomFill_ConstrainedFilling(const Standard_Integer MaxDeg, const Standard_Integer MaxSeg); |
70 | |
71 | Standard_EXPORT void Init (const Handle(GeomFill_Boundary)& B1, const Handle(GeomFill_Boundary)& B2, const Handle(GeomFill_Boundary)& B3, const Standard_Boolean NoCheck = Standard_False); |
72 | |
73 | //! Constructs a BSpline surface filled from the series of |
74 | //! boundaries B1, B2, B3 and, if need be, B4, which serve: |
75 | //! - as path constraints |
76 | //! - and optionally, as tangency constraints if they are |
77 | //! GeomFill_BoundWithSurf curves. |
78 | //! The boundaries may be given in any order: they are |
79 | //! classified and if necessary, reversed and reparameterized. |
80 | //! The surface will also respect the following constraints: |
81 | //! - its degree will not be greater than the maximum |
82 | //! degree defined at the time of construction of this framework, and |
83 | //! - the maximum number of segments MaxSeg which BSpline surfaces can have |
84 | Standard_EXPORT void Init (const Handle(GeomFill_Boundary)& B1, const Handle(GeomFill_Boundary)& B2, const Handle(GeomFill_Boundary)& B3, const Handle(GeomFill_Boundary)& B4, const Standard_Boolean NoCheck = Standard_False); |
85 | |
86 | //! Allows to modify domain on witch the blending function |
87 | //! associated to the constrained boundary B will propag |
88 | //! the influence of the field of tangency. Can be |
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89 | //! useful to reduce influence of boundaries on which |
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90 | //! the Coons compatibility conditions are not respected. |
91 | //! l is a relative value of the parametric range of B. |
92 | //! Default value for l is 1 (used in Init). |
93 | //! Warning: Must be called after Init with a constrained boundary |
94 | //! used in the call to Init. |
95 | Standard_EXPORT void SetDomain (const Standard_Real l, const Handle(GeomFill_BoundWithSurf)& B); |
96 | |
97 | //! Computes the new poles of the surface using the new |
98 | //! blending functions set by several calls to SetDomain. |
99 | Standard_EXPORT void ReBuild(); |
100 | |
101 | //! Returns the bound of index i after sort. |
102 | Standard_EXPORT Handle(GeomFill_Boundary) Boundary (const Standard_Integer I) const; |
103 | |
104 | //! Returns the BSpline surface after computation of the fill by this framework. |
105 | Standard_EXPORT Handle(Geom_BSplineSurface) Surface() const; |
106 | |
107 | //! Internal use for Advmath approximation call. |
108 | Standard_EXPORT Standard_Integer Eval (const Standard_Real W, const Standard_Integer Ord, Standard_Real& Result) const; |
109 | |
110 | //! Computes the fields of tangents on 30 points along the |
111 | //! bound I, these are not the constraint tangents but |
112 | //! gives an idea of the coonsAlgPatch regularity. |
113 | Standard_EXPORT void CheckCoonsAlgPatch (const Standard_Integer I); |
114 | |
115 | //! Computes the fields of tangents and normals on 30 |
116 | //! points along the bound I, draw them, and computes the |
117 | //! max dot product that must be near than 0. |
118 | Standard_EXPORT void CheckTgteField (const Standard_Integer I); |
119 | |
120 | //! Computes values and normals along the bound I and |
121 | //! compare them to the approx result curves (bound and |
122 | //! tgte field) , draw the normals and tangents. |
123 | Standard_EXPORT void CheckApprox (const Standard_Integer I); |
124 | |
125 | //! Computes values and normals along the bound I on both |
126 | //! constraint surface and result surface, draw the |
127 | //! normals, and computes the max distance between values |
128 | //! and the max angle between normals. |
129 | Standard_EXPORT void CheckResult (const Standard_Integer I); |
130 | |
131 | |
132 | |
133 | |
134 | protected: |
135 | |
136 | |
137 | |
138 | |
139 | |
140 | private: |
141 | |
142 | |
143 | //! Performs the approximation an compute the poles of the |
144 | //! surface. |
145 | Standard_EXPORT void Build(); |
146 | |
147 | //! Performs the parallel approximation on two oppsite |
148 | //! bounds |
149 | Standard_EXPORT void PerformApprox(); |
150 | |
151 | //! matches the nodal vectors of the blending functions |
152 | //! and the results of the approx to allow the surface |
153 | //! computation. |
154 | Standard_EXPORT void MatchKnots(); |
155 | |
156 | //! performs the poles of the partial construction S0. |
157 | Standard_EXPORT void PerformS0(); |
158 | |
159 | //! performs the poles of the partial construction S1. |
160 | Standard_EXPORT void PerformS1(); |
161 | |
162 | //! performs the poles of the surface using the partial |
163 | //! constructions S0 and S1. |
164 | Standard_EXPORT void PerformSurface(); |
165 | |
166 | //! Checks if the field of tangency doesn t twist along the |
167 | //! boundary. |
168 | Standard_EXPORT Standard_Boolean CheckTgte (const Standard_Integer I); |
169 | |
170 | //! Evaluates the min magnitude of the field of tangency |
171 | //! along bound I to allow a simple evaluation of the |
172 | //! tolerance needed for the approximation of the field of |
173 | //! tangency. |
174 | Standard_EXPORT void MinTgte (const Standard_Integer I); |
175 | |
176 | |
177 | Standard_Integer degmax; |
178 | Standard_Integer segmax; |
179 | Handle(GeomFill_CoonsAlgPatch) ptch; |
180 | Handle(GeomFill_TgtField) tgalg[4]; |
181 | Standard_Real mig[4]; |
182 | GeomFill_CornerState stcor[4]; |
183 | gp_Vec v[4]; |
184 | Standard_Boolean appdone; |
185 | Standard_Integer degree[2]; |
186 | Handle(TColgp_HArray1OfPnt) curvpol[4]; |
187 | Handle(TColgp_HArray1OfPnt) tgtepol[4]; |
188 | Handle(TColStd_HArray1OfInteger) mults[2]; |
189 | Handle(TColStd_HArray1OfReal) knots[2]; |
190 | Handle(TColStd_HArray1OfReal) ab[4]; |
191 | Handle(TColStd_HArray1OfReal) pq[4]; |
192 | Standard_Real dom[4]; |
193 | Handle(TColgp_HArray1OfPnt) ncpol[4]; |
194 | Handle(TColgp_HArray1OfPnt) ntpol[4]; |
195 | Handle(TColStd_HArray1OfInteger) nm[2]; |
196 | Handle(TColStd_HArray1OfReal) nk[2]; |
197 | Standard_Integer ibound[2]; |
198 | Standard_Integer ctr[2]; |
199 | Standard_Integer nbd3; |
200 | Handle(TColgp_HArray2OfPnt) S0; |
201 | Handle(TColgp_HArray2OfPnt) S1; |
202 | Handle(Geom_BSplineSurface) surf; |
203 | |
204 | |
205 | }; |
206 | |
207 | |
208 | |
209 | |
210 | |
211 | |
212 | |
213 | #endif // _GeomFill_ConstrainedFilling_HeaderFile |