1 // Created on: 1992-10-01
2 // Created by: Jacques GOUSSARD
3 // Copyright (c) 1992-1999 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 _IntSurf_InteriorPointTool_HeaderFile
18 #define _IntSurf_InteriorPointTool_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
25 #include <Standard_Real.hxx>
27 #include <gp_Dir2d.hxx>
28 class IntSurf_InteriorPoint;
31 //! This class provides a tool on the "interior point"
32 //! that can be used to instantiates the Walking
33 //! algorithmes (see package IntWalk).
34 class IntSurf_InteriorPointTool
41 //! Returns the 3d coordinates of the starting point.
42 static gp_Pnt Value3d (const IntSurf_InteriorPoint& PStart);
44 //! Returns the <U,V> parameters which are associated
46 //! it's the parameters which start the marching algorithm
47 static void Value2d (const IntSurf_InteriorPoint& PStart, Standard_Real& U, Standard_Real& V);
49 //! returns the tangent at the intersectin in 3d space
51 static gp_Vec Direction3d (const IntSurf_InteriorPoint& PStart);
53 //! returns the tangent at the intersectin in the
54 //! parametric space of the parametrized surface.This tangent
55 //! is associated to the value2d
56 static gp_Dir2d Direction2d (const IntSurf_InteriorPoint& PStart);
76 #include <IntSurf_InteriorPointTool.lxx>
82 #endif // _IntSurf_InteriorPointTool_HeaderFile