§Establish relations between objects,
typically geometric, may define behaviour
§E.g. a door or window placed in a wall
§Database objects, can store member data
§Many sub types, major hierarchy:
§Anchor
§ AnchorToReference
§ AnchorEntityToCurve
§Example to check whether a geo object is
anchored:
§
§2a - Aec Basics.vb > TestAnchor command
Dim geo As Geo = tr.GetObject(geoId,
OpenMode.ForRead)
If geo.AnchorId.IsNull Then
' Not anchored
Else
Dim
anchor As Anchor = tr.GetObject(geo.AnchorId, OpenMode.ForRead)
' Further check anchor type...
End If