myEqualEdges : MapOfShape from TopTools; -- equal splits
myNewSection : MapOfShape from TopTools; -- new secton edges
myClosedShapes : MapOfShape from TopTools;
+ mySharedFaces : MapOfShape from TopTools; -- faces shared by several shapes
myWrappingSolid: MapOfShape from TopTools; -- solids having other shapes inside
myFaceShapeMap : DataMapOfShapeShape from TopTools; -- to find a shape by face