1 // Created on: 1994-02-24
2 // Created by: Laurent BOURESCHE
3 // Copyright (c) 1994-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
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.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _BRepLProp_CurveTool_HeaderFile
18 #define _BRepLProp_CurveTool_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Real.hxx>
25 #include <Standard_Integer.hxx>
26 class BRepAdaptor_Curve;
32 class BRepLProp_CurveTool
39 //! Computes the point <P> of parameter <U> on the curve <C>.
40 Standard_EXPORT static void Value (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P);
42 //! Computes the point <P> and first derivative <V1> of
43 //! parameter <U> on the curve <C>.
44 Standard_EXPORT static void D1 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1);
46 //! Computes the point <P>, the first derivative <V1> and second
47 //! derivative <V2> of parameter <U> on the curve <C>.
48 Standard_EXPORT static void D2 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2);
50 //! Computes the point <P>, the first derivative <V1>, the
51 //! second derivative <V2> and third derivative <V3> of
52 //! parameter <U> on the curve <C>.
53 Standard_EXPORT static void D3 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3);
55 //! returns the order of continuity of the curve <C>.
56 //! returns 1 : first derivative only is computable
57 //! returns 2 : first and second derivative only are computable.
58 //! returns 3 : first, second and third are computable.
59 Standard_EXPORT static Standard_Integer Continuity (const BRepAdaptor_Curve& C);
61 //! returns the first parameter bound of the curve.
62 Standard_EXPORT static Standard_Real FirstParameter (const BRepAdaptor_Curve& C);
64 //! returns the last parameter bound of the curve.
65 //! FirstParameter must be less than LastParamenter.
66 Standard_EXPORT static Standard_Real LastParameter (const BRepAdaptor_Curve& C);
91 #endif // _BRepLProp_CurveTool_HeaderFile