The command in the expression editor inserts the token at the insertion point in the editing pane. This token returns the distance between the centers of two objects. Replace the
dummy arguments and with object names.
NoteObject names must end in a period.
NoteYou may need to change frames to update the scene.
Example
ctr_dist(cone., Model1.sphere.)
Returns the distance between cone and sphere (which is a child of Model1).