include/opencascade/HLRBRep_CLPropsATool.hxx

0001 // Created on: 1993-04-20
0002 // Created by: Modelistation
0003 // Copyright (c) 1993-1999 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 _HLRBRep_CLPropsATool_HeaderFile
0018 #define _HLRBRep_CLPropsATool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Standard_Real.hxx>
0025 class gp_Pnt2d;
0026 class gp_Vec2d;
0027
0028
0029
0030 class HLRBRep_CLPropsATool
0031 {
0032 public:
0033
0034   DEFINE_STANDARD_ALLOC
0035
0036
0037   //! Computes the  point <P> of  parameter <U>   on the
0038   //! Curve from HLRBRep <C>.
0039     static void Value (const HLRBRep_Curve* A, const Standard_Real U, gp_Pnt2d& P);
0040
0041   //! Computes the point <P>  and  first derivative <V1>
0042   //! of parameter <U> on the curve <C>.
0043     static void D1 (const HLRBRep_Curve* A, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1);
0044
0045   //! Computes the point <P>,  the first derivative <V1>
0046   //! and second derivative <V2> of parameter <U> on the
0047   //! curve <C>.
0048     static void D2 (const HLRBRep_Curve* A, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2);
0049
0050   //! Computes the point <P>, the first derivative <V1>,
0051   //! the second derivative  <V2>   and third derivative
0052   //! <V3> of parameter <U> on the curve <C>.
0053     static void D3 (const HLRBRep_Curve* A, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3);
0054
0055   //! returns the order  of continuity of the curve <C>.
0056   //! returns 1 :  first  derivative only is  computable
0057   //! returns 2  : first and  second derivative only are
0058   //! computable.  returns  3 : first,  second and third
0059   //! are computable.
0060     static Standard_Integer Continuity (const HLRBRep_Curve* A);
0061
0062   //! returns the first parameter bound of the curve.
0063     static Standard_Real FirstParameter (const HLRBRep_Curve* A);
0064
0065   //! returns the  last  parameter bound  of  the curve.
0066   //! FirstParameter must be less than LastParamenter.
0067     static Standard_Real LastParameter (const HLRBRep_Curve* A);
0068
0069
0070
0071
0072 protected:
0073
0074
0075
0076
0077
0078 private:
0079
0080
0081
0082
0083
0084 };
0085
0086
0087 #include <HLRBRep_CLPropsATool.lxx>
0088
0089
0090
0091
0092
0093 #endif // _HLRBRep_CLPropsATool_HeaderFile