1 // Created on: 1993-02-19
2 // Created by: Remi LEQUETTE
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 _BRepAdaptor_Curve_HeaderFile
18 #define _BRepAdaptor_Curve_HeaderFile
19 
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
23 
24 #include <gp_Trsf.hxx>
25 #include <GeomAdaptor_Curve.hxx>
26 #include <TopoDS_Edge.hxx>
27 #include <Adaptor3d_Curve.hxx>
28 #include <Standard_Boolean.hxx>
29 #include <Standard_Real.hxx>
30 #include <GeomAbs_Shape.hxx>
31 #include <Standard_Integer.hxx>
32 #include <TColStd_Array1OfReal.hxx>
33 #include <GeomAbs_CurveType.hxx>
34 class Adaptor3d_HCurveOnSurface;
35 class Standard_NullObject;
36 class Standard_DomainError;
37 class Standard_OutOfRange;
38 class Standard_NoSuchObject;
39 class TopoDS_Edge;
40 class TopoDS_Face;
41 class gp_Trsf;
42 class GeomAdaptor_Curve;
43 class Adaptor3d_CurveOnSurface;
44 class Adaptor3d_HCurve;
45 class gp_Pnt;
46 class gp_Vec;
47 class gp_Lin;
48 class gp_Circ;
49 class gp_Elips;
50 class gp_Hypr;
51 class gp_Parab;
52 class Geom_BezierCurve;
53 class Geom_BSplineCurve;
54 class Geom_OffsetCurve;
55 
56 
57 //! The Curve from BRepAdaptor  allows to use  an Edge
58 //! of the BRep topology like a 3D curve.
59 //!
60 //! It has the methods the class Curve from Adaptor3d.
61 //!
62 //! It  is created or  Initialized  with  an Edge.  It
63 //! takes  into account local  coordinate systems.  If
64 //! the Edge has a 3D curve it is  use  with priority.
65 //! If the edge  has no 3D curve one  of the curves on
66 //! surface is used. It is possible to enforce using a
67 //! curve on surface by creating  or initialising with
68 //! an Edge and a Face.
69 class BRepAdaptor_Curve  : public Adaptor3d_Curve
70 {
71 public:
72 
73   DEFINE_STANDARD_ALLOC
74 
75 
76   //! Creates an undefined Curve with no Edge loaded.
77   Standard_EXPORT BRepAdaptor_Curve();
78 
79   //! Creates a Curve  to  acces to the geometry of edge
80   //! <E>.
81   Standard_EXPORT BRepAdaptor_Curve(const TopoDS_Edge& E);
82 
83   //! Creates a Curve to acces to  the geometry  of edge
84   //! <E>.   The geometry  will   be  computed using the
85   //! parametric curve of <E> on the face  <F>. An Error
86   //! is  raised if  the edge does  not have a pcurve on
87   //! the face.
88   Standard_EXPORT BRepAdaptor_Curve(const TopoDS_Edge& E, const TopoDS_Face& F);
89 
90   //! Reset currently loaded curve (undone Load()).
91   Standard_EXPORT void Reset();
92 
93   //! Sets  the Curve <me>  to acces to the  geometry of
94   //! edge <E>.
95   Standard_EXPORT void Initialize (const TopoDS_Edge& E);
96 
97   //! Sets the Curve <me>  to acces to  the  geometry of
98   //! edge <E>.  The geometry will be computed using the
99   //! parametric curve of <E>  on the face <F>. An Error
100   //! is raised if the edge  does not  have a pcurve  on
101   //! the face.
102   Standard_EXPORT void Initialize (const TopoDS_Edge& E, const TopoDS_Face& F);
103 
104   //! Returns the coordinate system of the curve.
105   Standard_EXPORT const gp_Trsf& Trsf() const;
106 
107   //! Returns True if the edge geometry is computed from
108   //! a 3D curve.
109   Standard_EXPORT Standard_Boolean Is3DCurve() const;
110 
111   //! Returns True if the edge geometry is computed from
112   //! a pcurve on a surface.
113   Standard_EXPORT Standard_Boolean IsCurveOnSurface() const;
114 
115   //! Returns the Curve of  the  edge.
116   Standard_EXPORT const GeomAdaptor_Curve& Curve() const;
117 
118   //! Returns the CurveOnSurface of the edge.
119   Standard_EXPORT const Adaptor3d_CurveOnSurface& CurveOnSurface() const;
120 
121   //! Returns the edge.
122   Standard_EXPORT const TopoDS_Edge& Edge() const;
123 
124   //! Returns the edge tolerance.
125   Standard_EXPORT Standard_Real Tolerance() const;
126 
127   Standard_EXPORT Standard_Real FirstParameter() const Standard_OVERRIDE;
128 
129   Standard_EXPORT Standard_Real LastParameter() const Standard_OVERRIDE;
130 
131   Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
132 
133   //! Returns  the number  of  intervals for  continuity
134   //! <S>. May be one if Continuity(me) >= <S>
135   Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
136 
137   //! Stores in <T> the  parameters bounding the intervals
138   //! of continuity <S>.
139   //!
140   //! The array must provide  enough room to  accomodate
141   //! for the parameters. i.e. T.Length() > NbIntervals()
142   Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
143 
144   //! Returns    a  curve equivalent   of  <me>  between
145   //! parameters <First>  and <Last>. <Tol>  is used  to
146   //! test for 3d points confusion.
147   //! If <First> >= <Last>
148   Standard_EXPORT Handle(Adaptor3d_HCurve) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE;
149 
150   Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
151 
152   Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
153 
154   Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE;
155 
156   //! Computes the point of parameter U on the curve
157   Standard_EXPORT gp_Pnt Value (const Standard_Real U) const Standard_OVERRIDE;
158 
159   //! Computes the point of parameter U.
160   Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt& P) const Standard_OVERRIDE;
161 
162   //! Computes the point of parameter U on the curve
163   //! with its first derivative.
164   //! Raised if the continuity of the current interval
165   //! is not C1.
166   Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt& P, gp_Vec& V) const Standard_OVERRIDE;
167 
168 
169   //! Returns the point P of parameter U, the first and second
170   //! derivatives V1 and V2.
171   //! Raised if the continuity of the current interval
172   //! is not C2.
173   Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2) const Standard_OVERRIDE;
174 
175 
176   //! Returns the point P of parameter U, the first, the second
177   //! and the third derivative.
178   //! Raised if the continuity of the current interval
179   //! is not C3.
180   Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3) const Standard_OVERRIDE;
181 
182 
183   //! The returned vector gives the value of the derivative for the
184   //! order of derivation N.
185   //! Raised if the continuity of the current interval
186   //! is not CN.
187   //! Raised if N < 1.
188   Standard_EXPORT gp_Vec DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE;
189 
190   //! returns the parametric resolution
191   Standard_EXPORT Standard_Real Resolution (const Standard_Real R3d) const Standard_OVERRIDE;
192 
193   Standard_EXPORT GeomAbs_CurveType GetType() const Standard_OVERRIDE;
194 
195   Standard_EXPORT gp_Lin Line() const Standard_OVERRIDE;
196 
197   Standard_EXPORT gp_Circ Circle() const Standard_OVERRIDE;
198 
199   Standard_EXPORT gp_Elips Ellipse() const Standard_OVERRIDE;
200 
201   Standard_EXPORT gp_Hypr Hyperbola() const Standard_OVERRIDE;
202 
203   Standard_EXPORT gp_Parab Parabola() const Standard_OVERRIDE;
204 
205   Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE;
206 
207   Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE;
208 
209   Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE;
210 
211   Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE;
212 
213 
214   //! Warning :
215   //! This  will    make a copy of the Bezier Curve
216   //! since it applies to it myTsrf . Be carefull when
217   //! using this method
218   Standard_EXPORT Handle(Geom_BezierCurve) Bezier() const Standard_OVERRIDE;
219 
220 
221   //! Warning :
222   //! This will   make a copy of the BSpline Curve
223   //! since it applies to it myTsrf . Be carefull when
224   //! using this method
225   Standard_EXPORT Handle(Geom_BSplineCurve) BSpline() const Standard_OVERRIDE;
226 
227   Standard_EXPORT Handle(Geom_OffsetCurve) OffsetCurve() const Standard_OVERRIDE;
228 
229 
230 
231 protected:
232 
233 
234 
235 
236 
237 private:
238 
239 
240 
241   gp_Trsf myTrsf;
242   GeomAdaptor_Curve myCurve;
243   Handle(Adaptor3d_HCurveOnSurface) myConSurf;
244   TopoDS_Edge myEdge;
245 
246 
247 };
248 
249 
250 
251 
252 
253 
254 
255 #endif // _BRepAdaptor_Curve_HeaderFile
256