0026106: BRepMesh - revision of data model
[occt.git] / src / IMeshTools / IMeshTools_ShapeExplorer.cxx
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7bd071ed 1// Created on: 2016-04-07
2// Copyright (c) 2016 OPEN CASCADE SAS
3// Created by: Oleg AGASHIN
4//
5// This file is part of Open CASCADE Technology software library.
6//
7// This library is free software; you can redistribute it and/or modify it under
8// the terms of the GNU Lesser General Public License version 2.1 as published
9// by the Free Software Foundation, with special exception defined in the file
10// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11// distribution for complete text of the license and disclaimer of any warranty.
12//
13// Alternatively, this file may be used under the terms of Open CASCADE
14// commercial license or contractual agreement.
15
16#include <IMeshTools_ShapeExplorer.hxx>
17#include <TopExp.hxx>
18#include <TopExp_Explorer.hxx>
19#include <TopoDS.hxx>
20#include <TopoDS_Face.hxx>
21#include <TopoDS_Edge.hxx>
22#include <TopTools_ListOfShape.hxx>
23#include <BRepLib.hxx>
24#include <BRep_Tool.hxx>
25#include <TopTools_MapOfShape.hxx>
26#include <Geom_Surface.hxx>
27
28//=======================================================================
29// Function: Constructor
30// Purpose :
31//=======================================================================
32IMeshTools_ShapeExplorer::IMeshTools_ShapeExplorer (
33 const TopoDS_Shape& theShape)
34 : IMeshData_Shape (theShape)
35{
36}
37
38//=======================================================================
39// Function: Destructor
40// Purpose :
41//=======================================================================
42IMeshTools_ShapeExplorer::~IMeshTools_ShapeExplorer ()
43{
44}
45
46//=======================================================================
47// Function: Accept
48// Purpose :
49//=======================================================================
50void IMeshTools_ShapeExplorer::Accept (
51 const Handle (IMeshTools_ShapeVisitor)& theVisitor)
52{
53 // Explore all edges in shape - either free or related to some face.
54 TopTools_IndexedMapOfShape aEdges;
55 TopExp::MapShapes (GetShape (), TopAbs_EDGE, aEdges);
56
57 TopTools_IndexedMapOfShape::Iterator aEdgeIt (aEdges);
58 for (; aEdgeIt.More (); aEdgeIt.Next ())
59 {
60 const TopoDS_Edge& aEdge = TopoDS::Edge (aEdgeIt.Value ());
61 if (!BRep_Tool::IsGeometric(aEdge))
62 {
63 continue;
64 }
65
66 theVisitor->Visit (aEdge);
67 }
68
69 // Explore faces
70 TopTools_ListOfShape aFaceList;
71 BRepLib::ReverseSortFaces (GetShape (), aFaceList);
72 TopTools_MapOfShape aFaceMap;
73
74 // make array of faces suitable for processing (excluding faces without surface)
75 TopLoc_Location aDummyLoc;
76 const TopLoc_Location aEmptyLoc;
77 TopTools_ListIteratorOfListOfShape aFaceIter (aFaceList);
78 for (; aFaceIter.More (); aFaceIter.Next ())
79 {
80 TopoDS_Shape aFaceNoLoc = aFaceIter.Value ();
81 aFaceNoLoc.Location (aEmptyLoc);
82 if (!aFaceMap.Add(aFaceNoLoc))
83 {
84 continue; // already processed
85 }
86
87 TopoDS_Face aFace = TopoDS::Face (aFaceIter.Value ());
88 const Handle (Geom_Surface)& aSurf = BRep_Tool::Surface (aFace, aDummyLoc);
89 if (aSurf.IsNull())
90 {
91 continue;
92 }
93
94 // Store only forward faces in order to prevent inverse issue.
95 theVisitor->Visit (TopoDS::Face (aFace.Oriented (TopAbs_FORWARD)));
96 }
97}