1 // Created on: 2015-09-21
2 // Copyright (c) 2015 OPEN CASCADE SAS
4 // This file is part of Open CASCADE Technology software library.
6 // This library is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU Lesser General Public License version 2.1 as published
8 // by the Free Software Foundation, with special exception defined in the file
9 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
10 // distribution for complete text of the license and disclaimer of any warranty.
12 // Alternatively, this file may be used under the terms of Open CASCADE
13 // commercial license or contractual agreement.
15 #ifndef _GeomEvaluator_OffsetCurve_HeaderFile
16 #define _GeomEvaluator_OffsetCurve_HeaderFile
18 #include <Geom_Curve.hxx>
19 #include <GeomAdaptor_Curve.hxx>
20 #include <GeomEvaluator_Curve.hxx>
23 //! Allows to calculate values and derivatives for offset curves in 3D
24 class GeomEvaluator_OffsetCurve : public GeomEvaluator_Curve
27 //! Initialize evaluator by curve
28 Standard_EXPORT GeomEvaluator_OffsetCurve(
29 const Handle(Geom_Curve)& theBase,
30 const Standard_Real theOffset,
31 const gp_Dir& theDirection);
32 //! Initialize evaluator by curve adaptor
33 Standard_EXPORT GeomEvaluator_OffsetCurve(
34 const Handle(GeomAdaptor_Curve)& theBase,
35 const Standard_Real theOffset,
36 const gp_Dir& theDirection);
38 //! Change the offset value
39 void SetOffsetValue(Standard_Real theOffset)
40 { myOffset = theOffset; }
42 void SetOffsetDirection(const gp_Dir& theDirection)
43 { myOffsetDir = theDirection; }
46 Standard_EXPORT void D0(const Standard_Real theU,
47 gp_Pnt& theValue) const Standard_OVERRIDE;
48 //! Value and first derivatives of curve
49 Standard_EXPORT void D1(const Standard_Real theU,
50 gp_Pnt& theValue, gp_Vec& theD1) const Standard_OVERRIDE;
51 //! Value, first and second derivatives of curve
52 Standard_EXPORT void D2(const Standard_Real theU,
53 gp_Pnt& theValue, gp_Vec& theD1, gp_Vec& theD2) const Standard_OVERRIDE;
54 //! Value, first, second and third derivatives of curve
55 Standard_EXPORT void D3(const Standard_Real theU,
56 gp_Pnt& theValue, gp_Vec& theD1,
57 gp_Vec& theD2, gp_Vec& theD3) const Standard_OVERRIDE;
58 //! Calculates N-th derivatives of curve, where N = theDeriv. Raises if N < 1
59 Standard_EXPORT gp_Vec DN(const Standard_Real theU,
60 const Standard_Integer theDeriv) const Standard_OVERRIDE;
62 Standard_EXPORT virtual Handle(GeomEvaluator_Curve) ShallowCopy() const Standard_OVERRIDE;
64 DEFINE_STANDARD_RTTIEXT(GeomEvaluator_OffsetCurve,GeomEvaluator_Curve)
67 //! Recalculate D1 values of base curve into D0 value of offset curve
68 void CalculateD0( gp_Pnt& theValue,
69 const gp_Vec& theD1) const;
70 //! Recalculate D2 values of base curve into D1 values of offset curve
71 void CalculateD1( gp_Pnt& theValue,
73 const gp_Vec& theD2) const;
74 //! Recalculate D3 values of base curve into D2 values of offset curve
75 void CalculateD2( gp_Pnt& theValue,
79 const Standard_Boolean theIsDirChange) const;
80 //! Recalculate D3 values of base curve into D3 values of offset curve
81 void CalculateD3( gp_Pnt& theValue,
86 const Standard_Boolean theIsDirChange) const;
88 //! Calculate value of base curve/adaptor
89 void BaseD0(const Standard_Real theU, gp_Pnt& theValue) const;
90 //! Calculate value and first derivatives of base curve/adaptor
91 void BaseD1(const Standard_Real theU,
92 gp_Pnt& theValue, gp_Vec& theD1) const;
93 //! Calculate value, first and second derivatives of base curve/adaptor
94 void BaseD2(const Standard_Real theU,
95 gp_Pnt& theValue, gp_Vec& theD1, gp_Vec& theD2) const;
96 //! Calculate value, first, second and third derivatives of base curve/adaptor
97 void BaseD3(const Standard_Real theU,
98 gp_Pnt& theValue, gp_Vec& theD1, gp_Vec& theD2, gp_Vec& theD3) const;
99 //! Calculate value and derivatives till 4th of base curve/adaptor
100 void BaseD4(const Standard_Real theU,
101 gp_Pnt& theValue, gp_Vec& theD1, gp_Vec& theD2, gp_Vec& theD3, gp_Vec& theD4) const;
102 //! Calculate N-th derivative of base curve/adaptor
103 gp_Vec BaseDN(const Standard_Real theU, const Standard_Integer theDeriv) const;
105 // Recalculate derivatives in the singular point
106 // Returns true if the direction of derivatives is changed
107 Standard_Boolean AdjustDerivative(const Standard_Integer theMaxDerivative,
108 const Standard_Real theU,
112 gp_Vec& theD4) const;
115 Handle(Geom_Curve) myBaseCurve;
116 Handle(GeomAdaptor_Curve) myBaseAdaptor;
118 Standard_Real myOffset; ///< offset value
119 gp_Dir myOffsetDir; ///< offset direction
122 DEFINE_STANDARD_HANDLE(GeomEvaluator_OffsetCurve, GeomEvaluator_Curve)
125 #endif // _GeomEvaluator_OffsetCurve_HeaderFile