+ } else if (theShapes.Size() > 1) {
+ // check it is possible to remove extra sub-shapes:
+ // keep only shapes with the same number of containers if possible
+ TopAbs_ShapeEnum anAncType = TopAbs_FACE;
+ if (aValType == TopAbs_VERTEX)
+ anAncType = TopAbs_EDGE;
+ TopoDS_Shape anOldContext = theOldContext->shape()->impl<TopoDS_Shape>();
+ TopTools_IndexedDataMapOfShapeListOfShape anOldMap;
+ TopExp::MapShapesAndUniqueAncestors(anOldContext, aValType, anAncType, anOldMap);
+ if (anOldMap.Contains(theValShape)) {
+ int aNumInOld = anOldMap.FindFromKey(theValShape).Extent();
+ TopTools_IndexedDataMapOfShapeListOfShape aNewMap;
+ TopExp::MapShapesAndUniqueAncestors(aNewContShape, aValType, anAncType, aNewMap);
+ TopTools_ListOfShape aNewResults;
+ for(TopTools_ListOfShape::Iterator aNewSubs(theShapes); aNewSubs.More(); aNewSubs.Next()) {
+ TopoDS_Shape aCand = aNewSubs.Value();
+ if (aNewMap.Contains(aCand) && aNewMap.FindFromKey(aCand).Extent() == aNumInOld)
+ aNewResults.Append(aCand);
+ }
+ if (!aNewResults.IsEmpty() && aNewResults.Size() < theShapes.Size())
+ theShapes = aNewResults;
+ }