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 // Created on: 1993-01-20
 // Created by: Laurent PAINNOT
 // Copyright (c) 1993-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _AppDef_MyLineTool_HeaderFile
 #define _AppDef_MyLineTool_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 
 #include <Standard_Integer.hxx>
 #include <gp_Pnt.hxx>
 #include <NCollection_Array1.hxx>
 #include <gp_Pnt2d.hxx>
 #include <gp_Vec.hxx>
 #include <gp_Vec2d.hxx>
 #include <Approx_Status.hxx>
 class AppDef_MultiLine;
 
 //! Example of MultiLine tool corresponding to the tools of the packages AppParCurves and Approx.
 //! For Approx, the tool will not add points if the algorithms want some.
 class AppDef_MyLineTool
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! Returns the first index of multipoints of the MultiLine.
   Standard_EXPORT static int FirstPoint(const AppDef_MultiLine& ML);
 
   //! Returns the last index of multipoints of the MultiLine.
   Standard_EXPORT static int LastPoint(const AppDef_MultiLine& ML);
 
   //! Returns the number of 2d points of a MultiLine.
   Standard_EXPORT static int NbP2d(const AppDef_MultiLine& ML);
 
   //! Returns the number of 3d points of a MultiLine.
   Standard_EXPORT static int NbP3d(const AppDef_MultiLine& ML);
 
   //! returns the 3d points of the multipoint <MPointIndex>
   //! when only 3d points exist.
   Standard_EXPORT static void Value(const AppDef_MultiLine&     ML,
                                     const int                   MPointIndex,
                                     NCollection_Array1<gp_Pnt>& tabPt);
 
   //! returns the 2d points of the multipoint <MPointIndex>
   //! when only 2d points exist.
   Standard_EXPORT static void Value(const AppDef_MultiLine&       ML,
                                     const int                     MPointIndex,
                                     NCollection_Array1<gp_Pnt2d>& tabPt2d);
 
   //! returns the 3d and 2d points of the multipoint
   //! <MPointIndex>.
   Standard_EXPORT static void Value(const AppDef_MultiLine&       ML,
                                     const int                     MPointIndex,
                                     NCollection_Array1<gp_Pnt>&   tabPt,
                                     NCollection_Array1<gp_Pnt2d>& tabPt2d);
 
   //! returns the 3d points of the multipoint <MPointIndex>
   //! when only 3d points exist.
   Standard_EXPORT static bool Tangency(const AppDef_MultiLine&     ML,
                                        const int                   MPointIndex,
                                        NCollection_Array1<gp_Vec>& tabV);
 
   //! returns the 2d tangency points of the multipoint
   //! <MPointIndex> only when 2d points exist.
   Standard_EXPORT static bool Tangency(const AppDef_MultiLine&       ML,
                                        const int                     MPointIndex,
                                        NCollection_Array1<gp_Vec2d>& tabV2d);
 
   //! returns the 3d and 2d points of the multipoint
   //! <MPointIndex>.
   Standard_EXPORT static bool Tangency(const AppDef_MultiLine&       ML,
                                        const int                     MPointIndex,
                                        NCollection_Array1<gp_Vec>&   tabV,
                                        NCollection_Array1<gp_Vec2d>& tabV2d);
 
   //! returns the 3d curvatures of the multipoint <MPointIndex>
   //! when only 3d points exist.
   Standard_EXPORT static bool Curvature(const AppDef_MultiLine&     ML,
                                         const int                   MPointIndex,
                                         NCollection_Array1<gp_Vec>& tabV);
 
   //! returns the 2d curvatures of the multipoint
   //! <MPointIndex> only when 2d points exist.
   Standard_EXPORT static bool Curvature(const AppDef_MultiLine&       ML,
                                         const int                     MPointIndex,
                                         NCollection_Array1<gp_Vec2d>& tabV2d);
 
   //! returns the 3d and 2d curvatures of the multipoint
   //! <MPointIndex>.
   Standard_EXPORT static bool Curvature(const AppDef_MultiLine&       ML,
                                         const int                     MPointIndex,
                                         NCollection_Array1<gp_Vec>&   tabV,
                                         NCollection_Array1<gp_Vec2d>& tabV2d);
 
   //! returns NoPointsAdded
   Standard_EXPORT static Approx_Status WhatStatus(const AppDef_MultiLine& ML,
                                                   const int               I1,
                                                   const int               I2);
 
   //! Is never called in the algorithms.
   //! Nothing is done.
   Standard_EXPORT static AppDef_MultiLine MakeMLBetween(const AppDef_MultiLine& ML,
                                                         const int               I1,
                                                         const int               I2,
                                                         const int               NbPMin);
 
   //! Is never called in the algorithms.
   //! Nothing is done.
   Standard_EXPORT static bool MakeMLOneMorePoint(const AppDef_MultiLine& ML,
                                                  const int               I1,
                                                  const int               I2,
                                                  const int               indbad,
                                                  AppDef_MultiLine&       OtherLine);
 };
 
 #endif // _AppDef_MyLineTool_HeaderFile

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