1 // Created on: 1993-01-26
2 // Created by: Jean-Louis FRENKEL
3 // Copyright (c) 1993-1999 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 _StdPrs_ToolRFace_HeaderFile
18 #define _StdPrs_ToolRFace_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <TopoDS_Face.hxx>
25 #include <TopExp_Explorer.hxx>
26 #include <Geom2dAdaptor_Curve.hxx>
27 #include <TopAbs_Orientation.hxx>
28 class BRepAdaptor_HSurface;
31 //! Iterator over 2D curves restricting a face (skipping internal/external edges).
32 //! In addition, the algorithm skips NULL curves - IsInvalidGeometry() can be checked if this should be handled within algorithm.
33 class StdPrs_ToolRFace
39 //! Empty constructor.
40 Standard_EXPORT StdPrs_ToolRFace();
42 //! Constructor with initialization.
43 Standard_EXPORT StdPrs_ToolRFace(const Handle(BRepAdaptor_HSurface)& aSurface);
45 //! Return TRUE indicating that iterator looks only for oriented edges.
46 Standard_Boolean IsOriented() const { return Standard_True; }
48 //! Move iterator to the first element.
51 myExplorer.Init (myFace, TopAbs_EDGE);
55 //! Return TRUE if iterator points to the curve.
56 Standard_Boolean More() const { return myExplorer.More(); }
58 //! Go to the next curve in the face.
65 //! Return current curve.
66 const Adaptor2d_Curve2d& Value() const { return myCurve; }
68 //! Return current edge.
69 Standard_EXPORT const TopoDS_Edge& Edge() const;
71 //! Return current edge orientation.
72 TopAbs_Orientation Orientation() const { return myExplorer.Current().Orientation(); }
74 //! Return TRUE if NULL curves have been skipped.
75 Standard_Boolean IsInvalidGeometry() const { return myHasNullCurves; }
79 //! Find nearest valid item for the iterator.
80 Standard_EXPORT void next();
85 TopExp_Explorer myExplorer;
86 Geom2dAdaptor_Curve myCurve;
87 Standard_Boolean myHasNullCurves;
91 #endif // _StdPrs_ToolRFace_HeaderFile