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1 | // Created on: 1993-06-03 |
2 | // Created by: Bruno DUMORTIER |
3 | // Copyright (c) 1993-1999 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 _Geom2dAdaptor_Curve_HeaderFile |
18 | #define _Geom2dAdaptor_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 <Adaptor2d_Curve2d.hxx> |
28 | #include <GeomAbs_Shape.hxx> |
29 | #include <Standard_Integer.hxx> |
30 | #include <TColStd_Array1OfReal.hxx> |
31 | #include <Standard_Boolean.hxx> |
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32 | #include <Geom2dEvaluator_Curve.hxx> |
33 | |
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34 | class Geom2d_Curve; |
35 | class Adaptor2d_HCurve2d; |
36 | class Standard_NoSuchObject; |
37 | class Standard_ConstructionError; |
38 | class Standard_OutOfRange; |
39 | class Standard_DomainError; |
40 | class gp_Pnt2d; |
41 | class gp_Vec2d; |
42 | class gp_Lin2d; |
43 | class gp_Circ2d; |
44 | class gp_Elips2d; |
45 | class gp_Hypr2d; |
46 | class gp_Parab2d; |
47 | class Geom2d_BezierCurve; |
48 | class Geom2d_BSplineCurve; |
49 | |
50 | |
51 | //! An interface between the services provided by any |
52 | //! curve from the package Geom2d and those required |
53 | //! of the curve by algorithms which use it. |
54 | class Geom2dAdaptor_Curve : public Adaptor2d_Curve2d |
55 | { |
56 | public: |
57 | |
58 | DEFINE_STANDARD_ALLOC |
59 | |
60 | |
61 | Standard_EXPORT Geom2dAdaptor_Curve(); |
62 | |
63 | Standard_EXPORT Geom2dAdaptor_Curve(const Handle(Geom2d_Curve)& C); |
64 | |
65 | //! ConstructionError is raised if Ufirst>Ulast |
66 | Standard_EXPORT Geom2dAdaptor_Curve(const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast); |
67 | |
68 | void Load (const Handle(Geom2d_Curve)& C); |
69 | |
70 | //! ConstructionError is raised if Ufirst>Ulast |
71 | void Load (const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast); |
72 | |
73 | const Handle(Geom2d_Curve)& Curve() const; |
74 | |
75 | Standard_Real FirstParameter() const Standard_OVERRIDE; |
76 | |
77 | Standard_Real LastParameter() const Standard_OVERRIDE; |
78 | |
79 | Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE; |
80 | |
81 | //! If necessary, breaks the curve in intervals of |
82 | //! continuity <S>. And returns the number of |
83 | //! intervals. |
84 | Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE; |
85 | |
86 | //! Stores in <T> the parameters bounding the intervals |
87 | //! of continuity <S>. |
88 | //! |
89 | //! The array must provide enough room to accomodate |
90 | //! for the parameters. i.e. T.Length() > NbIntervals() |
91 | Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE; |
92 | |
93 | //! Returns a curve equivalent of <me> between |
94 | //! parameters <First> and <Last>. <Tol> is used to |
95 | //! test for 3d points confusion. |
96 | //! If <First> >= <Last> |
97 | Standard_EXPORT Handle(Adaptor2d_HCurve2d) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE; |
98 | |
99 | Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE; |
100 | |
101 | Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE; |
102 | |
103 | Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE; |
104 | |
105 | //! Computes the point of parameter U on the curve |
106 | Standard_EXPORT gp_Pnt2d Value (const Standard_Real U) const Standard_OVERRIDE; |
107 | |
108 | //! Computes the point of parameter U. |
109 | Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt2d& P) const Standard_OVERRIDE; |
110 | |
111 | //! Computes the point of parameter U on the curve with its |
112 | //! first derivative. |
113 | //! Raised if the continuity of the current interval |
114 | //! is not C1. |
115 | Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const Standard_OVERRIDE; |
116 | |
117 | |
118 | //! Returns the point P of parameter U, the first and second |
119 | //! derivatives V1 and V2. |
120 | //! Raised if the continuity of the current interval |
121 | //! is not C2. |
122 | Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const Standard_OVERRIDE; |
123 | |
124 | |
125 | //! Returns the point P of parameter U, the first, the second |
126 | //! and the third derivative. |
127 | //! Raised if the continuity of the current interval |
128 | //! is not C3. |
129 | Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const Standard_OVERRIDE; |
130 | |
131 | |
132 | //! The returned vector gives the value of the derivative for the |
133 | //! order of derivation N. |
134 | //! Raised if the continuity of the current interval |
135 | //! is not CN. |
136 | //! Raised if N < 1. |
137 | Standard_EXPORT gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE; |
138 | |
139 | //! returns the parametric resolution |
140 | Standard_EXPORT Standard_Real Resolution (const Standard_Real Ruv) const Standard_OVERRIDE; |
141 | |
142 | GeomAbs_CurveType GetType() const Standard_OVERRIDE; |
143 | |
144 | Standard_EXPORT gp_Lin2d Line() const Standard_OVERRIDE; |
145 | |
146 | Standard_EXPORT gp_Circ2d Circle() const Standard_OVERRIDE; |
147 | |
148 | Standard_EXPORT gp_Elips2d Ellipse() const Standard_OVERRIDE; |
149 | |
150 | Standard_EXPORT gp_Hypr2d Hyperbola() const Standard_OVERRIDE; |
151 | |
152 | Standard_EXPORT gp_Parab2d Parabola() const Standard_OVERRIDE; |
153 | |
154 | Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE; |
155 | |
156 | Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE; |
157 | |
158 | Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE; |
159 | |
160 | Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE; |
161 | |
162 | Standard_EXPORT virtual Standard_Integer NbSamples() const Standard_OVERRIDE; |
163 | |
164 | Standard_EXPORT Handle(Geom2d_BezierCurve) Bezier() const Standard_OVERRIDE; |
165 | |
166 | Standard_EXPORT Handle(Geom2d_BSplineCurve) BSpline() const Standard_OVERRIDE; |
167 | |
168 | |
169 | |
170 | |
171 | protected: |
172 | |
173 | |
174 | |
175 | |
176 | |
177 | private: |
178 | |
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179 | Standard_EXPORT GeomAbs_Shape LocalContinuity (const Standard_Real U1, const Standard_Real U2) const; |
180 | |
181 | Standard_EXPORT void load (const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast); |
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182 | |
183 | //! Check theU relates to start or finish point of B-spline curve and return indices of span the point is located |
184 | Standard_Boolean IsBoundary(const Standard_Real theU, Standard_Integer& theSpanStart, Standard_Integer& theSpanFinish) const; |
185 | |
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186 | //! Rebuilds B-spline cache |
187 | //! \param theParameter the value on the knot axis which identifies the caching span |
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188 | void RebuildCache (const Standard_Real theParameter) const; |
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189 | |
190 | |
191 | Handle(Geom2d_Curve) myCurve; |
192 | GeomAbs_CurveType myTypeCurve; |
193 | Standard_Real myFirst; |
194 | Standard_Real myLast; |
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195 | Handle(BSplCLib_Cache) myCurveCache; ///< Cached data for B-spline or Bezier curve |
196 | Handle(Geom2dEvaluator_Curve) myNestedEvaluator; ///< Calculates value of offset curve |
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197 | |
198 | |
199 | }; |
200 | |
201 | |
202 | #include <Geom2dAdaptor_Curve.lxx> |
203 | |
204 | |
205 | |
206 | |
207 | |
208 | #endif // _Geom2dAdaptor_Curve_HeaderFile |