before_save :update_closed_at
- # over-expansion factor to use when updating the bounding box
- EXPAND = 0.1
-
# maximum number of elements allowed in a changeset
MAX_ELEMENTS = 10000
end
##
- # expand the bounding box to include the given bounding box. also,
- # expand a little bit more in the direction of the expansion, so that
- # further expansions may be unnecessary. this is an optimisation
- # suggested on the wiki page by kleptog.
+ # expand the bounding box to include the given bounding box.
def update_bbox!(bbox_update)
- bbox.expand!(bbox_update, EXPAND)
+ bbox.expand!(bbox_update)
# update active record. rails 2.1's dirty handling should take care of
# whether this object needs saving or not.
##
# the number of elements is also passed in so that we can ensure that
- # a single changeset doesn't contain too many elements. this, of course,
- # destroys the optimisation described in the bbox method above.
+ # a single changeset doesn't contain too many elements.
def add_changes!(elements)
self.num_changes += elements
end