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1 | // Created on: 1992-09-01 |
2 | // Created by: Modelistation |
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 _GeomAdaptor_Curve_HeaderFile |
18 | #define _GeomAdaptor_Curve_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <GeomAbs_CurveType.hxx> |
25 | #include <Standard_Real.hxx> |
26 | #include <BSplCLib_Cache.hxx> |
27 | #include <Adaptor3d_Curve.hxx> |
28 | #include <GeomAbs_Shape.hxx> |
29 | #include <Standard_Integer.hxx> |
30 | #include <TColStd_Array1OfReal.hxx> |
31 | #include <Standard_Boolean.hxx> |
32 | class Geom_Curve; |
33 | class Adaptor3d_HCurve; |
34 | class Standard_NoSuchObject; |
35 | class Standard_ConstructionError; |
36 | class Standard_OutOfRange; |
37 | class Standard_DomainError; |
38 | class GeomAdaptor_Surface; |
39 | class gp_Pnt; |
40 | class gp_Vec; |
41 | class gp_Lin; |
42 | class gp_Circ; |
43 | class gp_Elips; |
44 | class gp_Hypr; |
45 | class gp_Parab; |
46 | class Geom_BezierCurve; |
47 | class Geom_BSplineCurve; |
48 | |
49 | |
50 | //! This class provides an interface between the services provided by any |
51 | //! curve from the package Geom and those required of the curve by algorithms which use it. |
52 | //! Creation of the loaded curve the curve is C1 by piece. |
53 | class GeomAdaptor_Curve : public Adaptor3d_Curve |
54 | { |
55 | public: |
56 | |
57 | DEFINE_STANDARD_ALLOC |
58 | |
59 | |
60 | GeomAdaptor_Curve(); |
61 | |
62 | GeomAdaptor_Curve(const Handle(Geom_Curve)& C); |
63 | |
64 | //! ConstructionError is raised if Ufirst>Ulast |
65 | GeomAdaptor_Curve(const Handle(Geom_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast); |
66 | |
67 | void Load (const Handle(Geom_Curve)& C); |
68 | |
69 | //! ConstructionError is raised if Ufirst>Ulast |
70 | void Load (const Handle(Geom_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast); |
71 | |
72 | |
73 | //! Provides a curve inherited from Hcurve from Adaptor. |
74 | //! This is inherited to provide easy to use constructors. |
75 | const Handle(Geom_Curve)& Curve() const; |
76 | |
77 | Standard_Real FirstParameter() const Standard_OVERRIDE; |
78 | |
79 | Standard_Real LastParameter() const Standard_OVERRIDE; |
80 | |
81 | Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE; |
82 | |
83 | //! Returns the number of intervals for continuity |
84 | //! <S>. May be one if Continuity(me) >= <S> |
85 | Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE; |
86 | |
87 | //! Stores in <T> the parameters bounding the intervals |
88 | //! of continuity <S>. |
89 | //! |
90 | //! The array must provide enough room to accomodate |
91 | //! for the parameters. i.e. T.Length() > NbIntervals() |
92 | Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE; |
93 | |
94 | //! Returns a curve equivalent of <me> between |
95 | //! parameters <First> and <Last>. <Tol> is used to |
96 | //! test for 3d points confusion. |
97 | //! If <First> >= <Last> |
98 | Standard_EXPORT Handle(Adaptor3d_HCurve) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE; |
99 | |
100 | Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE; |
101 | |
102 | Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE; |
103 | |
104 | Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE; |
105 | |
106 | //! Computes the point of parameter U on the curve |
107 | Standard_EXPORT gp_Pnt Value (const Standard_Real U) const Standard_OVERRIDE; |
108 | |
109 | //! Computes the point of parameter U. |
110 | Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt& P) const Standard_OVERRIDE; |
111 | |
112 | //! Computes the point of parameter U on the curve |
113 | //! with its first derivative. |
114 | //! |
115 | //! Warning : On the specific case of BSplineCurve: |
116 | //! if the curve is cut in interval of continuity at least C1, the |
117 | //! derivatives are computed on the current interval. |
118 | //! else the derivatives are computed on the basis curve. |
119 | Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt& P, gp_Vec& V) const Standard_OVERRIDE; |
120 | |
121 | |
122 | //! Returns the point P of parameter U, the first and second |
123 | //! derivatives V1 and V2. |
124 | //! |
125 | //! Warning : On the specific case of BSplineCurve: |
126 | //! if the curve is cut in interval of continuity at least C2, the |
127 | //! derivatives are computed on the current interval. |
128 | //! else the derivatives are computed on the basis curve. |
129 | Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2) const Standard_OVERRIDE; |
130 | |
131 | |
132 | //! Returns the point P of parameter U, the first, the second |
133 | //! and the third derivative. |
134 | //! |
135 | //! Warning : On the specific case of BSplineCurve: |
136 | //! if the curve is cut in interval of continuity at least C3, the |
137 | //! derivatives are computed on the current interval. |
138 | //! else the derivatives are computed on the basis curve. |
139 | Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3) const Standard_OVERRIDE; |
140 | |
141 | |
142 | //! The returned vector gives the value of the derivative for the |
143 | //! order of derivation N. |
144 | //! Warning : On the specific case of BSplineCurve: |
145 | //! if the curve is cut in interval of continuity CN, the |
146 | //! derivatives are computed on the current interval. |
147 | //! else the derivatives are computed on the basis curve. |
148 | //! Raised if N < 1. |
149 | Standard_EXPORT gp_Vec DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE; |
150 | |
151 | //! returns the parametric resolution |
152 | Standard_EXPORT Standard_Real Resolution (const Standard_Real R3d) const Standard_OVERRIDE; |
153 | |
154 | GeomAbs_CurveType GetType() const Standard_OVERRIDE; |
155 | |
156 | Standard_EXPORT gp_Lin Line() const Standard_OVERRIDE; |
157 | |
158 | Standard_EXPORT gp_Circ Circle() const Standard_OVERRIDE; |
159 | |
160 | Standard_EXPORT gp_Elips Ellipse() const Standard_OVERRIDE; |
161 | |
162 | Standard_EXPORT gp_Hypr Hyperbola() const Standard_OVERRIDE; |
163 | |
164 | Standard_EXPORT gp_Parab Parabola() const Standard_OVERRIDE; |
165 | |
166 | |
167 | //! this should NEVER make a copy |
168 | //! of the underlying curve to read |
169 | //! the relevant information |
170 | Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE; |
171 | |
172 | |
173 | //! this should NEVER make a copy |
174 | //! of the underlying curve to read |
175 | //! the relevant information |
176 | Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE; |
177 | |
178 | |
179 | //! this should NEVER make a copy |
180 | //! of the underlying curve to read |
181 | //! the relevant information |
182 | Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE; |
183 | |
184 | |
185 | //! this should NEVER make a copy |
186 | //! of the underlying curve to read |
187 | //! the relevant information |
188 | Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE; |
189 | |
190 | //! this will NOT make a copy of the |
191 | //! Bezier Curve : If you want to modify |
192 | //! the Curve please make a copy yourself |
193 | //! Also it will NOT trim the surface to |
194 | //! myFirst/Last. |
195 | Standard_EXPORT Handle(Geom_BezierCurve) Bezier() const Standard_OVERRIDE; |
196 | |
197 | //! this will NOT make a copy of the |
198 | //! BSpline Curve : If you want to modify |
199 | //! the Curve please make a copy yourself |
200 | //! Also it will NOT trim the surface to |
201 | //! myFirst/Last. |
202 | Standard_EXPORT Handle(Geom_BSplineCurve) BSpline() const Standard_OVERRIDE; |
203 | |
204 | |
205 | friend class GeomAdaptor_Surface; |
206 | |
207 | |
208 | protected: |
209 | |
210 | |
211 | |
212 | |
213 | |
214 | private: |
215 | |
216 | |
217 | //! Computes the point of parameter U on the B-spline curve |
218 | Standard_EXPORT gp_Pnt ValueBSpline (const Standard_Real U) const; |
219 | |
220 | //! Computes the point of parameter U on the offset curve |
221 | Standard_EXPORT gp_Pnt ValueOffset (const Standard_Real U) const; |
222 | |
223 | //! Computes the point of parameter U on the B-spline curve |
224 | Standard_EXPORT void D0BSpline (const Standard_Real theU, gp_Pnt& theP) const; |
225 | |
226 | //! Computes the point of parameter U on the offset curve |
227 | Standard_EXPORT void D0Offset (const Standard_Real theU, gp_Pnt& theP) const; |
228 | |
229 | //! Computes the point of parameter U on the B-spline curve |
230 | //! and its derivative |
231 | Standard_EXPORT void D1BSpline (const Standard_Real theU, gp_Pnt& theP, gp_Vec& theV) const; |
232 | |
233 | //! Computes the point of parameter U on the offset curve |
234 | //! and its derivative |
235 | Standard_EXPORT void D1Offset (const Standard_Real theU, gp_Pnt& theP, gp_Vec& theV) const; |
236 | |
237 | //! Computes the point of parameter U on the B-spline curve |
238 | //! and its first and second derivatives |
239 | Standard_EXPORT void D2BSpline (const Standard_Real theU, gp_Pnt& theP, gp_Vec& theV1, gp_Vec& theV2) const; |
240 | |
241 | //! Computes the point of parameter U on the offset curve |
242 | //! and its first and second derivatives |
243 | Standard_EXPORT void D2Offset (const Standard_Real theU, gp_Pnt& theP, gp_Vec& theV1, gp_Vec& theV2) const; |
244 | |
245 | //! Computes the point of parameter U on the B-spline curve |
246 | //! and its first, second and third derivatives |
247 | Standard_EXPORT void D3BSpline (const Standard_Real theU, gp_Pnt& theP, gp_Vec& theV1, gp_Vec& theV2, gp_Vec& theV3) const; |
248 | |
249 | //! Computes the point of parameter U on the offset curve |
250 | //! and its first, second and third derivatives |
251 | Standard_EXPORT void D3Offset (const Standard_Real theU, gp_Pnt& theP, gp_Vec& theV1, gp_Vec& theV2, gp_Vec& theV3) const; |
252 | |
253 | |
254 | //! The returned vector gives the value of the derivative for the |
255 | //! order of derivation N. |
256 | Standard_EXPORT gp_Vec DNBSpline (const Standard_Real theU, const Standard_Integer N) const; |
257 | |
258 | |
259 | //! The returned vector gives the value of the derivative for the |
260 | //! order of derivation N. |
261 | Standard_EXPORT gp_Vec DNOffset (const Standard_Real theU, const Standard_Integer N) const; |
262 | |
263 | Standard_EXPORT GeomAbs_Shape LocalContinuity (const Standard_Real U1, const Standard_Real U2) const; |
264 | |
265 | Standard_EXPORT void load (const Handle(Geom_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast); |
266 | |
267 | //! Rebuilds B-spline cache |
268 | //! \param theParameter the value on the knot axis which identifies the caching span |
269 | Standard_EXPORT void RebuildCache (const Standard_Real theParameter) const; |
270 | |
271 | |
272 | Handle(Geom_Curve) myCurve; |
273 | GeomAbs_CurveType myTypeCurve; |
274 | Standard_Real myFirst; |
275 | Standard_Real myLast; |
276 | Handle(BSplCLib_Cache) myCurveCache; |
277 | Handle(Adaptor3d_HCurve) myOffsetBaseCurveAdaptor; |
278 | |
279 | |
280 | }; |
281 | |
282 | |
283 | #include <GeomAdaptor_Curve.lxx> |
284 | |
285 | |
286 | |
287 | |
288 | |
289 | #endif // _GeomAdaptor_Curve_HeaderFile |