1 // Created on: 1992-02-18
2 // Created by: Christophe MARION
3 // Copyright (c) 1992-1999 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 _HLRAlgo_HeaderFile
18 #define _HLRAlgo_HeaderFile
20 #include <HLRAlgo_WiresBlock.hxx>
22 //! In order to have the precision required in
23 //! industrial design, drawings need to offer the
24 //! possibility of removing lines, which are hidden
25 //! in a given projection. To do this, the Hidden
26 //! Line Removal component provides two
27 //! algorithms: HLRBRep_Algo and HLRBRep_PolyAlgo.
28 //! These algorithms remove or indicate lines
29 //! hidden by surfaces. For a given projection, they
30 //! calculate a set of lines characteristic of the
31 //! object being represented. They are also used
32 //! in conjunction with extraction utilities, which
33 //! reconstruct a new, simplified shape from a
34 //! selection of calculation results. This new shape
35 //! is made up of edges, which represent the lines
36 //! of the visualized shape in a plane. This plane is the projection plane.
37 //! HLRBRep_Algo takes into account the shape
38 //! itself. HLRBRep_PolyAlgo works with a
39 //! polyhedral simplification of the shape. When
40 //! you use HLRBRep_Algo, you obtain an exact
41 //! result, whereas, when you use
42 //! HLRBRep_PolyAlgo, you reduce computation
43 //! time but obtain polygonal segments.
50 //! Iterator on the visible or hidden parts of an
52 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]);
54 Standard_EXPORT static void EnlargeMinMax (const Standard_Real tol, Standard_Real Min[16], Standard_Real Max[16]);
56 Standard_EXPORT static void InitMinMax (const Standard_Real Big, Standard_Real Min[16], Standard_Real Max[16]);
58 Standard_EXPORT static void EncodeMinMax (HLRAlgo_EdgesBlock::MinMaxIndices& Min, HLRAlgo_EdgesBlock::MinMaxIndices& Max, HLRAlgo_EdgesBlock::MinMaxIndices& MinMax);
60 Standard_EXPORT static Standard_Real SizeBox (HLRAlgo_EdgesBlock::MinMaxIndices& Min, HLRAlgo_EdgesBlock::MinMaxIndices& Max);
62 Standard_EXPORT static void DecodeMinMax (const HLRAlgo_EdgesBlock::MinMaxIndices& MinMax, HLRAlgo_EdgesBlock::MinMaxIndices& Min, HLRAlgo_EdgesBlock::MinMaxIndices& Max);
64 static void CopyMinMax (HLRAlgo_EdgesBlock::MinMaxIndices& IMin, HLRAlgo_EdgesBlock::MinMaxIndices& IMax, HLRAlgo_EdgesBlock::MinMaxIndices& OMin, HLRAlgo_EdgesBlock::MinMaxIndices& OMax)
70 Standard_EXPORT static void AddMinMax (HLRAlgo_EdgesBlock::MinMaxIndices& IMin, HLRAlgo_EdgesBlock::MinMaxIndices& IMax, HLRAlgo_EdgesBlock::MinMaxIndices& OMin, HLRAlgo_EdgesBlock::MinMaxIndices& OMax);
74 #endif // _HLRAlgo_HeaderFile