| 1 | // Created on: 1993-04-02 |
| 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 _Adaptor2d_Curve2d_HeaderFile |
| 18 | #define _Adaptor2d_Curve2d_HeaderFile |
| 19 | |
| 20 | #include <Standard.hxx> |
| 21 | #include <Standard_DefineAlloc.hxx> |
| 22 | #include <Standard_Handle.hxx> |
| 23 | |
| 24 | #include <Standard_Real.hxx> |
| 25 | #include <GeomAbs_Shape.hxx> |
| 26 | #include <Standard_Integer.hxx> |
| 27 | #include <TColStd_Array1OfReal.hxx> |
| 28 | #include <Standard_Boolean.hxx> |
| 29 | #include <GeomAbs_CurveType.hxx> |
| 30 | class Standard_OutOfRange; |
| 31 | class Standard_NoSuchObject; |
| 32 | class Standard_DomainError; |
| 33 | class Adaptor2d_HCurve2d; |
| 34 | class gp_Pnt2d; |
| 35 | class gp_Vec2d; |
| 36 | class gp_Lin2d; |
| 37 | class gp_Circ2d; |
| 38 | class gp_Elips2d; |
| 39 | class gp_Hypr2d; |
| 40 | class gp_Parab2d; |
| 41 | class Geom2d_BezierCurve; |
| 42 | class Geom2d_BSplineCurve; |
| 43 | |
| 44 | |
| 45 | //! Root class for 2D curves on which geometric |
| 46 | //! algorithms work. |
| 47 | //! An adapted curve is an interface between the |
| 48 | //! services provided by a curve, and those required of |
| 49 | //! the curve by algorithms, which use it. |
| 50 | //! A derived concrete class is provided: |
| 51 | //! Geom2dAdaptor_Curve for a curve from the Geom2d package. |
| 52 | //! |
| 53 | //! Polynomial coefficients of BSpline curves used for their evaluation are |
| 54 | //! cached for better performance. Therefore these evaluations are not |
| 55 | //! thread-safe and parallel evaluations need to be prevented. |
| 56 | class Adaptor2d_Curve2d |
| 57 | { |
| 58 | public: |
| 59 | |
| 60 | DEFINE_STANDARD_ALLOC |
| 61 | |
| 62 | |
| 63 | Standard_EXPORT virtual Standard_Real FirstParameter() const; |
| 64 | |
| 65 | Standard_EXPORT virtual Standard_Real LastParameter() const; |
| 66 | |
| 67 | Standard_EXPORT virtual GeomAbs_Shape Continuity() const; |
| 68 | |
| 69 | //! If necessary, breaks the curve in intervals of |
| 70 | //! continuity <S>. And returns the number of |
| 71 | //! intervals. |
| 72 | Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const; |
| 73 | |
| 74 | //! Stores in <T> the parameters bounding the intervals |
| 75 | //! of continuity <S>. |
| 76 | //! |
| 77 | //! The array must provide enough room to accomodate |
| 78 | //! for the parameters. i.e. T.Length() > NbIntervals() |
| 79 | Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const; |
| 80 | |
| 81 | //! Returns a curve equivalent of <me> between |
| 82 | //! parameters <First> and <Last>. <Tol> is used to |
| 83 | //! test for 3d points confusion. |
| 84 | //! If <First> >= <Last> |
| 85 | Standard_EXPORT virtual Handle(Adaptor2d_HCurve2d) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const; |
| 86 | |
| 87 | Standard_EXPORT virtual Standard_Boolean IsClosed() const; |
| 88 | |
| 89 | Standard_EXPORT virtual Standard_Boolean IsPeriodic() const; |
| 90 | |
| 91 | Standard_EXPORT virtual Standard_Real Period() const; |
| 92 | |
| 93 | //! Computes the point of parameter U on the curve. |
| 94 | Standard_EXPORT virtual gp_Pnt2d Value (const Standard_Real U) const; |
| 95 | |
| 96 | //! Computes the point of parameter U on the curve. |
| 97 | Standard_EXPORT virtual void D0 (const Standard_Real U, gp_Pnt2d& P) const; |
| 98 | |
| 99 | //! Computes the point of parameter U on the curve with its |
| 100 | //! first derivative. |
| 101 | //! Raised if the continuity of the current interval |
| 102 | //! is not C1. |
| 103 | Standard_EXPORT virtual void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const; |
| 104 | |
| 105 | |
| 106 | //! Returns the point P of parameter U, the first and second |
| 107 | //! derivatives V1 and V2. |
| 108 | //! Raised if the continuity of the current interval |
| 109 | //! is not C2. |
| 110 | Standard_EXPORT virtual void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const; |
| 111 | |
| 112 | |
| 113 | //! Returns the point P of parameter U, the first, the second |
| 114 | //! and the third derivative. |
| 115 | //! Raised if the continuity of the current interval |
| 116 | //! is not C3. |
| 117 | Standard_EXPORT virtual void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const; |
| 118 | |
| 119 | |
| 120 | //! The returned vector gives the value of the derivative for the |
| 121 | //! order of derivation N. |
| 122 | //! Raised if the continuity of the current interval |
| 123 | //! is not CN. |
| 124 | //! Raised if N < 1. |
| 125 | Standard_EXPORT virtual gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const; |
| 126 | |
| 127 | //! Returns the parametric resolution corresponding |
| 128 | //! to the real space resolution <R3d>. |
| 129 | Standard_EXPORT virtual Standard_Real Resolution (const Standard_Real R3d) const; |
| 130 | |
| 131 | //! Returns the type of the curve in the current |
| 132 | //! interval : Line, Circle, Ellipse, Hyperbola, |
| 133 | //! Parabola, BezierCurve, BSplineCurve, OtherCurve. |
| 134 | Standard_EXPORT virtual GeomAbs_CurveType GetType() const; |
| 135 | |
| 136 | Standard_EXPORT virtual gp_Lin2d Line() const; |
| 137 | |
| 138 | Standard_EXPORT virtual gp_Circ2d Circle() const; |
| 139 | |
| 140 | Standard_EXPORT virtual gp_Elips2d Ellipse() const; |
| 141 | |
| 142 | Standard_EXPORT virtual gp_Hypr2d Hyperbola() const; |
| 143 | |
| 144 | Standard_EXPORT virtual gp_Parab2d Parabola() const; |
| 145 | |
| 146 | Standard_EXPORT virtual Standard_Integer Degree() const; |
| 147 | |
| 148 | Standard_EXPORT virtual Standard_Boolean IsRational() const; |
| 149 | |
| 150 | Standard_EXPORT virtual Standard_Integer NbPoles() const; |
| 151 | |
| 152 | Standard_EXPORT virtual Standard_Integer NbKnots() const; |
| 153 | |
| 154 | Standard_EXPORT virtual Standard_Integer NbSamples() const; |
| 155 | |
| 156 | Standard_EXPORT virtual Handle(Geom2d_BezierCurve) Bezier() const; |
| 157 | |
| 158 | Standard_EXPORT virtual Handle(Geom2d_BSplineCurve) BSpline() const; |
| 159 | Standard_EXPORT virtual ~Adaptor2d_Curve2d(); |
| 160 | |
| 161 | |
| 162 | |
| 163 | |
| 164 | protected: |
| 165 | |
| 166 | |
| 167 | |
| 168 | |
| 169 | |
| 170 | private: |
| 171 | |
| 172 | |
| 173 | |
| 174 | |
| 175 | |
| 176 | }; |
| 177 | |
| 178 | |
| 179 | |
| 180 | |
| 181 | |
| 182 | |
| 183 | |
| 184 | #endif // _Adaptor2d_Curve2d_HeaderFile |