include/opencascade/BRepLProp_CurveTool.hxx

0001 // Created on: 1994-02-24
0002 // Created by: Laurent BOURESCHE
0003 // Copyright (c) 1994-1999 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 _BRepLProp_CurveTool_HeaderFile
0018 #define _BRepLProp_CurveTool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022
0023 #include <Standard_Integer.hxx>
0024 class BRepAdaptor_Curve;
0025 class gp_Pnt;
0026 class gp_Vec;
0027
0028
0029
0030 class BRepLProp_CurveTool
0031 {
0032 public:
0033
0034   DEFINE_STANDARD_ALLOC
0035
0036
0037   //! Computes the point <P> of parameter <U> on the curve <C>.
0038   Standard_EXPORT static void Value (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P);
0039
0040   //! Computes the point <P> and first derivative <V1> of
0041   //! parameter <U> on the curve <C>.
0042   Standard_EXPORT static void D1 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1);
0043
0044   //! Computes the point <P>, the first derivative <V1> and second
0045   //! derivative <V2> of parameter <U> on the curve <C>.
0046   Standard_EXPORT static void D2 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2);
0047
0048   //! Computes the point <P>, the first derivative <V1>, the
0049   //! second derivative <V2> and third derivative <V3> of
0050   //! parameter <U> on the curve <C>.
0051   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);
0052
0053   //! returns the order of continuity of the curve <C>.
0054   //! returns 1 : first derivative only is computable
0055   //! returns 2 : first and second derivative only are computable.
0056   //! returns 3 : first, second and third are computable.
0057   Standard_EXPORT static Standard_Integer Continuity (const BRepAdaptor_Curve& C);
0058
0059   //! returns the first parameter bound of the curve.
0060   Standard_EXPORT static Standard_Real FirstParameter (const BRepAdaptor_Curve& C);
0061
0062   //! returns the last parameter bound of the curve.
0063   //! FirstParameter must be less than LastParamenter.
0064   Standard_EXPORT static Standard_Real LastParameter (const BRepAdaptor_Curve& C);
0065
0066
0067
0068
0069 protected:
0070
0071
0072
0073
0074
0075 private:
0076
0077
0078
0079
0080
0081 };
0082
0083
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0088
0089 #endif // _BRepLProp_CurveTool_HeaderFile