include/opencascade/IntSurf_InteriorPointTool.hxx

0001 // Created on: 1992-10-01
0002 // Created by: Jacques GOUSSARD
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 _IntSurf_InteriorPointTool_HeaderFile
0018 #define _IntSurf_InteriorPointTool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022
0023 #include <gp_Pnt.hxx>
0024 #include <gp_Vec.hxx>
0025 #include <gp_Dir2d.hxx>
0026 class IntSurf_InteriorPoint;
0027
0028 //! This class provides a tool on the "interior point"
0029 //! that can be used to instantiates the Walking
0030 //! algorithms (see package IntWalk).
0031 class IntSurf_InteriorPointTool
0032 {
0033 public:
0034   DEFINE_STANDARD_ALLOC
0035
0036   //! Returns the 3d coordinates of the starting point.
0037   static gp_Pnt Value3d(const IntSurf_InteriorPoint& PStart);
0038
0039   //! Returns the <U,V> parameters which are associated
0040   //! with <P>
0041   //! it's the parameters which start the marching algorithm
0042   static void Value2d(const IntSurf_InteriorPoint& PStart, Standard_Real& U, Standard_Real& V);
0043
0044   //! returns the tangent at the intersection in 3d space
0045   //! associated to <P>
0046   static gp_Vec Direction3d(const IntSurf_InteriorPoint& PStart);
0047
0048   //! returns the tangent at the intersection in the
0049   //! parametric space of the parametrized surface.This tangent
0050   //! is associated to the value2d
0051   static gp_Dir2d Direction2d(const IntSurf_InteriorPoint& PStart);
0052
0053 protected:
0054 private:
0055 };
0056
0057 #include <IntSurf_InteriorPointTool.lxx>
0058
0059 #endif // _IntSurf_InteriorPointTool_HeaderFile