+ // 23.04.2010 skl for bug 21699 from Mantis
+ BRepCheck_Analyzer ana (aShape, Standard_True);
+ ana.Init(aShape);
+ if (!ana.IsValid()) {
+ ShapeFix_ShapeTolerance aSFT;
+ aSFT.LimitTolerance(aShape, Precision::Confusion(),
+ Precision::Confusion(), TopAbs_SHAPE);
+ Handle(ShapeFix_Shape) aSfs = new ShapeFix_Shape(aShape);
+ aSfs->Perform();
+ aShape = aSfs->Shape();
+ ana.Init(aShape);
+ if (!ana.IsValid())
+ Standard_ConstructionError::Raise("Boolean operation aborted : non valid shape result");
+ }
+ }
+ else {