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_Curve_HeaderFile
16 #define _GeomEvaluator_Curve_HeaderFile
18 #include <Standard_Transient.hxx>
19 #include <Standard_Type.hxx>
24 //! Interface for calculation of values and derivatives for different kinds of curves in 3D.
25 //! Works both with adaptors and curves.
26 class GeomEvaluator_Curve : public Standard_Transient
29 GeomEvaluator_Curve() {}
32 virtual void D0(const Standard_Real theU,
33 gp_Pnt& theValue) const = 0;
34 //! Value and first derivatives of curve
35 virtual void D1(const Standard_Real theU,
36 gp_Pnt& theValue, gp_Vec& theD1) const = 0;
37 //! Value, first and second derivatives of curve
38 virtual void D2(const Standard_Real theU,
39 gp_Pnt& theValue, gp_Vec& theD1, gp_Vec& theD2) const = 0;
40 //! Value, first, second and third derivatives of curve
41 virtual void D3(const Standard_Real theU,
42 gp_Pnt& theValue, gp_Vec& theD1, gp_Vec& theD2, gp_Vec& theD3) const = 0;
43 //! Calculates N-th derivatives of curve, where N = theDerU. Raises if N < 1
44 virtual gp_Vec DN(const Standard_Real theU,
45 const Standard_Integer theDerU) const = 0;
47 DEFINE_STANDARD_RTTI_INLINE(GeomEvaluator_Curve,Standard_Transient)
50 DEFINE_STANDARD_HANDLE(GeomEvaluator_Curve, Standard_Transient)
53 #endif // _GeomEvaluator_Curve_HeaderFile