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// File: BRepAlgo_Tool.cxx
// Created: Mon Oct 23 14:25:07 1995
// Author: Yves FRICAUD
// <yfr@stylox>
#include <BRepAlgo_Tool.ixx>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
#include <TopExp.hxx>
#include <BRep_Builder.hxx>
#include <BRep_Tool.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Iterator.hxx>
#include <TopoDS_Edge.hxx>
//=======================================================================
//function : Deboucle3D
//purpose :
//=======================================================================
TopoDS_Shape BRepAlgo_Tool::Deboucle3D(const TopoDS_Shape& S,
const TopTools_MapOfShape& Boundary)
{
TopoDS_Shape SS;
switch ( S.ShapeType()) {
case TopAbs_FACE:
{
}
break;
case TopAbs_SHELL:
{
// si le shell contient des bords libres qui n'appartiennent pas aux
// bord libres des bouchons ( Boundary) on l'enleve.
TopTools_IndexedDataMapOfShapeListOfShape Map;
TopExp::MapShapesAndAncestors(S,TopAbs_EDGE,TopAbs_FACE,Map);
Standard_Boolean JeGarde = Standard_True;
for ( Standard_Integer i = 1; i <= Map.Extent() && JeGarde; i++) {
if (Map(i).Extent() < 2) {
const TopoDS_Edge& anEdge = TopoDS::Edge(Map.FindKey(i));
if (!Boundary.Contains(anEdge) &&
!BRep_Tool::Degenerated(anEdge) )
JeGarde = Standard_False;
}
}
if ( JeGarde) SS = S;
}
break;
case TopAbs_COMPOUND:
case TopAbs_SOLID:
{
// on itere sur les sous-shape et on ajoute les non vides.
TopoDS_Iterator it(S);
TopoDS_Shape SubShape;
Standard_Boolean NbSub = 0;
BRep_Builder B;
if (S.ShapeType() == TopAbs_COMPOUND) {
B.MakeCompound(TopoDS::Compound(SS));
}
else {
B.MakeSolid(TopoDS::Solid(SS));
}
for ( ; it.More(); it.Next()) {
const TopoDS_Shape& CurS = it.Value();
SubShape = Deboucle3D(CurS,Boundary);
if ( !SubShape.IsNull()) {
B.Add(SS, SubShape);
NbSub++;
}
}
if (NbSub == 0) SS = TopoDS_Shape();
}
break;
default:
break;
}
return SS;
}
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