include/opencascade/GeomHash_SurfaceHasher.hxx

0001 // Copyright (c) 2025 OPEN CASCADE SAS
0002 //
0003 // This file is part of Open CASCADE Technology software library.
0004 //
0005 // This library is free software; you can redistribute it and/or modify it under
0006 // the terms of the GNU Lesser General Public License version 2.1 as published
0007 // by the Free Software Foundation, with special exception defined in the file
0008 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0009 // distribution for complete text of the license and disclaimer of any warranty.
0010 //
0011 // Alternatively, this file may be used under the terms of Open CASCADE
0012 // commercial license or contractual agreement.
0013
0014 #ifndef _GeomHash_SurfaceHasher_HeaderFile
0015 #define _GeomHash_SurfaceHasher_HeaderFile
0016
0017 #include <Standard_Handle.hxx>
0018 #include <cstddef>
0019 #include <Precision.hxx>
0020
0021 class Geom_Surface;
0022
0023 //! Polymorphic hasher for Geom_Surface using RTTI dispatch.
0024 //! Used for geometry deduplication.
0025 struct GeomHash_SurfaceHasher
0026 {
0027   double CompTolerance;
0028   double HashTolerance;
0029
0030   Standard_EXPORT GeomHash_SurfaceHasher(double theCompTolerance = Precision::Angular(),
0031                                          double theHashTolerance = Precision::Confusion());
0032
0033   // Hashes any Geom_Surface by dispatching to the appropriate specific hasher.
0034   Standard_EXPORT std::size_t operator()(
0035     const occ::handle<Geom_Surface>& theSurface) const noexcept;
0036
0037   // Compares two surfaces using polymorphic dispatch.
0038   Standard_EXPORT bool operator()(const occ::handle<Geom_Surface>& theSurface1,
0039                                   const occ::handle<Geom_Surface>& theSurface2) const noexcept;
0040 };
0041
0042 #endif // _GeomHash_SurfaceHasher_HeaderFile