Join walls aId and bId. See computeWallJoin for the geometry and
options. When the pair is already joined, the old relationship is removed
(its name and priorities carried over) and the wall that ran through then
still does, unless options.priority says otherwise. Nothing is written
when the join is refused.
Join walls
aIdandbId. SeecomputeWallJoinfor the geometry and options. When the pair is already joined, the old relationship is removed (its name and priorities carried over) and the wall that ran through then still does, unlessoptions.prioritysays otherwise. Nothing is written when the join is refused.