include/opencascade/Geom2dLProp_Curve2dTool.hxx

0001 // Created on: 1992-03-26
0002 // Created by: Herve LEGRAND
0003 // Copyright (c) 1992-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _Geom2dLProp_Curve2dTool_HeaderFile
0018 #define _Geom2dLProp_Curve2dTool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Standard_Integer.hxx>
0025 class Geom2d_Curve;
0026 class gp_Pnt2d;
0027 class gp_Vec2d;
0028
0029
0030
0031 class Geom2dLProp_Curve2dTool
0032 {
0033 public:
0034
0035   DEFINE_STANDARD_ALLOC
0036
0037
0038   //! Computes the point <P> of parameter <U> on the curve <C>.
0039   Standard_EXPORT static void Value (const Handle(Geom2d_Curve)& C, const Standard_Real U, gp_Pnt2d& P);
0040
0041   //! Computes the point <P> and first derivative <V1> of
0042   //! parameter <U> on the curve <C>.
0043   Standard_EXPORT static void D1 (const Handle(Geom2d_Curve)& C, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1);
0044
0045   //! Computes the point <P>, the first derivative <V1> and second
0046   //! derivative <V2> of parameter <U> on the curve <C>.
0047   Standard_EXPORT static void D2 (const Handle(Geom2d_Curve)& C, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2);
0048
0049   //! Computes the point <P>, the first derivative <V1>, the
0050   //! second derivative <V2> and third derivative <V3> of
0051   //! parameter <U> on the curve <C>.
0052   Standard_EXPORT static void D3 (const Handle(Geom2d_Curve)& C, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3);
0053
0054   //! returns the order of continuity of the curve <C>.
0055   //! returns 1 : first derivative only is computable
0056   //! returns 2 : first and second derivative only are computable.
0057   //! returns 3 : first, second and third are computable.
0058   Standard_EXPORT static Standard_Integer Continuity (const Handle(Geom2d_Curve)& C);
0059
0060   //! returns the first parameter bound of the curve.
0061   Standard_EXPORT static Standard_Real FirstParameter (const Handle(Geom2d_Curve)& C);
0062
0063   //! returns the last parameter bound of the curve.
0064   //! FirstParameter must be less than LastParameter.
0065   Standard_EXPORT static Standard_Real LastParameter (const Handle(Geom2d_Curve)& C);
0066
0067
0068
0069
0070 protected:
0071
0072
0073
0074
0075
0076 private:
0077
0078
0079
0080
0081
0082 };
0083
0084
0085
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0087
0088
0089
0090 #endif // _Geom2dLProp_Curve2dTool_HeaderFile