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
0029 //! This class provides a tool on the "interior point"
0030 //! that can be used to instantiates the Walking
0031 //! algorithms (see package IntWalk).
0032 class IntSurf_InteriorPointTool
0033 {
0034 public:
0035
0036   DEFINE_STANDARD_ALLOC
0037
0038
0039   //! Returns the 3d coordinates of the starting point.
0040     static gp_Pnt Value3d (const IntSurf_InteriorPoint& PStart);
0041
0042   //! Returns the <U,V> parameters which are associated
0043   //! with <P>
0044   //! it's the parameters which start the marching algorithm
0045     static void Value2d (const IntSurf_InteriorPoint& PStart, Standard_Real& U, Standard_Real& V);
0046
0047   //! returns the tangent at the intersectin in 3d space
0048   //! associated to <P>
0049     static gp_Vec Direction3d (const IntSurf_InteriorPoint& PStart);
0050
0051   //! returns the tangent at the intersectin in the
0052   //! parametric space of the parametrized surface.This tangent
0053   //! is associated to the value2d
0054     static gp_Dir2d Direction2d (const IntSurf_InteriorPoint& PStart);
0055
0056
0057
0058
0059 protected:
0060
0061
0062
0063
0064
0065 private:
0066
0067
0068
0069
0070
0071 };
0072
0073
0074 #include <IntSurf_InteriorPointTool.lxx>
0075
0076
0077
0078
0079
0080 #endif // _IntSurf_InteriorPointTool_HeaderFile