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 // Created on: 1992-02-18
 // Created by: Christophe MARION
 // Copyright (c) 1992-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _HLRAlgo_HeaderFile
 #define _HLRAlgo_HeaderFile
 
 #include <HLRAlgo_WiresBlock.hxx>
 
 //! In order to have the precision required in
 //! industrial design, drawings need to offer the
 //! possibility of removing lines, which are hidden
 //! in a given projection. To do this, the Hidden
 //! Line Removal component provides two
 //! algorithms: HLRBRep_Algo and HLRBRep_PolyAlgo.
 //! These algorithms remove or indicate lines
 //! hidden by surfaces. For a given projection, they
 //! calculate a set of lines characteristic of the
 //! object being represented. They are also used
 //! in conjunction with extraction utilities, which
 //! reconstruct a new, simplified shape from a
 //! selection of calculation results. This new shape
 //! is made up of edges, which represent the lines
 //! of the visualized shape in a plane. This plane is the projection plane.
 //! HLRBRep_Algo takes into account the shape
 //! itself. HLRBRep_PolyAlgo works with a
 //! polyhedral simplification of the shape. When
 //! you use HLRBRep_Algo, you obtain an exact
 //! result, whereas, when you use
 //! HLRBRep_PolyAlgo, you reduce computation
 //! time but obtain polygonal segments.
 class HLRAlgo 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   //! Iterator  on the  visible or  hidden  parts of  an
   //! EdgeStatus.
   Standard_EXPORT static void UpdateMinMax (const Standard_Real x, const Standard_Real y, const Standard_Real z, Standard_Real Min[16], Standard_Real Max[16]);
   
   Standard_EXPORT static void EnlargeMinMax (const Standard_Real tol, Standard_Real Min[16], Standard_Real Max[16]);
   
   Standard_EXPORT static void InitMinMax (const Standard_Real Big, Standard_Real Min[16], Standard_Real Max[16]);
   
   Standard_EXPORT static void EncodeMinMax (HLRAlgo_EdgesBlock::MinMaxIndices& Min, HLRAlgo_EdgesBlock::MinMaxIndices& Max, HLRAlgo_EdgesBlock::MinMaxIndices& MinMax);
   
   Standard_EXPORT static Standard_Real SizeBox (HLRAlgo_EdgesBlock::MinMaxIndices& Min, HLRAlgo_EdgesBlock::MinMaxIndices& Max);
   
   Standard_EXPORT static void DecodeMinMax (const HLRAlgo_EdgesBlock::MinMaxIndices& MinMax, HLRAlgo_EdgesBlock::MinMaxIndices& Min, HLRAlgo_EdgesBlock::MinMaxIndices& Max);
   
   static void CopyMinMax (HLRAlgo_EdgesBlock::MinMaxIndices& IMin, HLRAlgo_EdgesBlock::MinMaxIndices& IMax, HLRAlgo_EdgesBlock::MinMaxIndices& OMin, HLRAlgo_EdgesBlock::MinMaxIndices& OMax)
   {
     OMin = IMin;
     OMax = IMax;
   }
   
   Standard_EXPORT static void AddMinMax (HLRAlgo_EdgesBlock::MinMaxIndices& IMin, HLRAlgo_EdgesBlock::MinMaxIndices& IMax, HLRAlgo_EdgesBlock::MinMaxIndices& OMin, HLRAlgo_EdgesBlock::MinMaxIndices& OMax);
 
 };
 
 #endif // _HLRAlgo_HeaderFile

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