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The previous code has a condition to avoid processing the same faces if the face has a location. The similar condition should be applied during the edges processing. If not doing this, in the previous implementation, IMeshData_Edge instances are created for all edges(even located), but edges of faces located are not filled with curves. As a result we had wrong local selection of edges. Limit addition of edges to data model by ones with unique TShape and location using edges map already available in BRepMesh_ShapeVisitor.
114 lines
3.8 KiB
C++
114 lines
3.8 KiB
C++
// Created on: 2016-04-07
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// Copyright (c) 2016 OPEN CASCADE SAS
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// Created by: Oleg AGASHIN
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <IMeshTools_ShapeExplorer.hxx>
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#include <TopExp.hxx>
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#include <TopExp_Explorer.hxx>
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#include <TopoDS.hxx>
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#include <TopoDS_Face.hxx>
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#include <TopoDS_Edge.hxx>
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#include <TopTools_ListOfShape.hxx>
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#include <BRepLib.hxx>
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#include <BRep_Tool.hxx>
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#include <TopTools_MapOfShape.hxx>
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#include <Geom_Surface.hxx>
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namespace
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{
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//=======================================================================
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// Function: visitEdges
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// Purpose : Explodes the given shape on edges according to the specified
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// criteria and visits each one in order to add it to data model.
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//=======================================================================
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void visitEdges (const Handle (IMeshTools_ShapeVisitor)& theVisitor,
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const TopoDS_Shape& theShape,
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const TopAbs_ShapeEnum theToFind,
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const TopAbs_ShapeEnum theToAvoid = TopAbs_SHAPE)
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{
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TopExp_Explorer aEdgesIt (theShape, theToFind, theToAvoid);
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for (; aEdgesIt.More (); aEdgesIt.Next ())
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{
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const TopoDS_Edge& aEdge = TopoDS::Edge (aEdgesIt.Current ());
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if (!BRep_Tool::IsGeometric (aEdge))
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{
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continue;
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}
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theVisitor->Visit (aEdge);
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}
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}
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}
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//=======================================================================
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// Function: Constructor
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// Purpose :
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//=======================================================================
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IMeshTools_ShapeExplorer::IMeshTools_ShapeExplorer (
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const TopoDS_Shape& theShape)
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: IMeshData_Shape (theShape)
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{
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}
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//=======================================================================
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// Function: Destructor
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// Purpose :
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//=======================================================================
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IMeshTools_ShapeExplorer::~IMeshTools_ShapeExplorer ()
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{
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}
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//=======================================================================
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// Function: Accept
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// Purpose :
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//=======================================================================
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void IMeshTools_ShapeExplorer::Accept (
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const Handle (IMeshTools_ShapeVisitor)& theVisitor)
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{
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// Explore all free edges in shape.
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visitEdges (theVisitor, GetShape (), TopAbs_EDGE, TopAbs_FACE);
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// Explore all related to some face edges in shape.
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// make array of faces suitable for processing (excluding faces without surface)
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TopTools_ListOfShape aFaceList;
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BRepLib::ReverseSortFaces (GetShape (), aFaceList);
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TopTools_MapOfShape aFaceMap;
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TopLoc_Location aDummyLoc;
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const TopLoc_Location aEmptyLoc;
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TopTools_ListIteratorOfListOfShape aFaceIter (aFaceList);
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for (; aFaceIter.More (); aFaceIter.Next ())
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{
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TopoDS_Shape aFaceNoLoc = aFaceIter.Value ();
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aFaceNoLoc.Location (aEmptyLoc);
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if (!aFaceMap.Add(aFaceNoLoc))
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{
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continue; // already processed
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}
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const TopoDS_Face& aFace = TopoDS::Face (aFaceIter.Value ());
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const Handle (Geom_Surface)& aSurf = BRep_Tool::Surface (aFace, aDummyLoc);
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if (aSurf.IsNull())
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{
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continue;
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}
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// Explore all edges in face.
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visitEdges (theVisitor, aFace, TopAbs_EDGE);
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// Store only forward faces in order to prevent inverse issue.
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theVisitor->Visit (TopoDS::Face (aFace.Oriented (TopAbs_FORWARD)));
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}
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}
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