+ //DEBTRACE("generateTopShape");
+ TopoDS_Face aResultFace = TopoDS_Face(); // --- result: default = null face
+
+ if (!aPolyline.IsNull())
+ {
+ TopoDS_Shape aPolylineShape = aPolyline->GetShape();
+#ifdef DEB_IMZ
+ std::string brepName = "imz.brep";
+ BRepTools::Write(aPolylineShape, brepName.c_str());
+#endif
+ TopTools_ListOfShape aWiresList;
+
+ if (!aPolylineShape.IsNull() && aPolylineShape.ShapeType() == TopAbs_WIRE)
+ {
+ // --- only one wire: try to make a face
+ //DEBTRACE("one wire: try to build a face");
+ const TopoDS_Wire& aPolylineWire = TopoDS::Wire(aPolylineShape);
+ if (!aPolylineWire.IsNull())
+ {
+ BRepBuilderAPI_MakeFace aMakeFace(aPolylineWire, Standard_True);
+ aMakeFace.Build();
+ if (aMakeFace.IsDone())
+ {
+ //DEBTRACE(" a face with the only wire given");
+ aResultFace = aMakeFace.Face();
+ }
+ }
+ }
+ else
+ {
+ // --- a list of wires ? inventory of wires and edges
+ Handle(TopTools_HSequenceOfShape) aSeqWires = new TopTools_HSequenceOfShape;
+ Handle(TopTools_HSequenceOfShape) aSeqEdges = new TopTools_HSequenceOfShape;
+ TopExp_Explorer anExp(aPolylineShape, TopAbs_WIRE);
+ //DEBTRACE("list of wires ?");
+ for (; anExp.More(); anExp.Next())
+ {
+ if (!anExp.Current().IsNull())
+ {
+ const TopoDS_Wire& aWire = TopoDS::Wire(anExp.Current());
+ aWiresList.Append(aWire);
+ //DEBTRACE(" append wire");
+ TopExp_Explorer it2(aWire, TopAbs_EDGE);
+ for (; it2.More(); it2.Next())
+ aSeqEdges->Append(it2.Current());
+ }
+ }
+ if (aWiresList.IsEmpty())
+ return aResultFace; // --- no wires: null result
+
+ if (aSeqEdges->Length() > 1)
+ {
+ //DEBTRACE("try to connect all the edges together, build a unique wire and a face");
+ // --- try to create one wire by connecting edges with a distance tolerance (no necessity of sharing points)
+ ShapeAnalysis_FreeBounds::ConnectEdgesToWires(aSeqEdges, 1E-5, Standard_False, aSeqWires);
+
+ if (aSeqWires->Length() == 1)
+ {
+ // --- one wire: try to make a face
+ const TopoDS_Wire& aPolylineWire = TopoDS::Wire(aSeqWires->Value(1));
+ if (!aPolylineWire.IsNull())
+ {
+ BRepBuilderAPI_MakeFace aMakeFace(aPolylineWire, Standard_True);
+ aMakeFace.Build();
+ if (aMakeFace.IsDone())
+ {
+ //DEBTRACE(" a face from all the wires connected");
+ aResultFace = aMakeFace.Face();
+ }
+ }
+ }
+ }
+
+ if (aResultFace.IsNull())
+ {
+ //DEBTRACE("try to make a face with the first wire of the list and other wires as restrictions");
+ // --- try to make a face with the first wire of the list and other wires as restrictions
+ BRepAlgo_FaceRestrictor aFR;
+ TopoDS_Face aRefFace;
+ TopoDS_Shape aS = aWiresList.First();
+ BRepBuilderAPI_MakeFace aMakeFace(TopoDS::Wire(aWiresList.First()), Standard_True);
+ aMakeFace.Build();
+ if (aMakeFace.IsDone())
+ {
+ //DEBTRACE(" a face with first wire");
+ aRefFace = aMakeFace.Face();
+ }
+ if (!aRefFace.IsNull())
+ {
+ aFR.Init(aRefFace, Standard_False, Standard_True);
+ TopTools_ListIteratorOfListOfShape anIt(aWiresList);
+ for (; anIt.More(); anIt.Next())
+ {
+ TopoDS_Wire& aWire = TopoDS::Wire(anIt.Value());
+ if (aWire.IsNull())
+ continue;
+ aFR.Add(aWire);
+ }
+ aFR.Perform();
+ if (aFR.IsDone())
+ {
+ for (; aFR.More(); aFR.Next())
+ {
+ //DEBTRACE(" a restricted face");
+ aResultFace = aFR.Current();
+ break;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if (aResultFace.IsNull())
+ return aResultFace;
+
+ //DEBTRACE("check the face");
+ BRepCheck_Analyzer anAnalyzer(aResultFace);
+ if (anAnalyzer.IsValid() && aResultFace.ShapeType() == TopAbs_FACE)
+ {
+ //DEBTRACE("face OK");
+ return aResultFace;
+ }
+ else
+ {
+ //DEBTRACE("bad face");
+ }
+ return TopoDS_Face();