Format
Entered(atom/movable/Obj,atom/OldLoc)
When
Called when an object has entered the contents list through Move(). Directly setting the object’s loc or step_x/y vars does not result in a call to Entered() or any other movement side-effects. The same goes for creation or deletion of an object at a location.
Args
Obj: the object that entered (a mob or obj).OldLoc: the previous location of the object.
Default action
None for most atoms, but turfs will call Crossed().
turf/pit
Entered(O)
O << "OUCH. You fell in a pit!"The mob’s Entered() and Exited() procs can be used to control what happens when objects are added or removed from the mob’s inventory. Of course that could all be done within get() and drop() verbs, but the following code separates user interface from lower-level functions.
obj
var
weight = 10
verb
get()
set src in oview(1)
if(Move(usr))
usr << "You pick up \a [src]."
else
usr << "You cannot pick up [src]."
drop()
set src in usr
if(Move(usr.loc))
usr << "You drop \a [src]."
mob
var
weight
max_weight = 50
Entered(obj/O)
weight += O.weight
Exited(obj/O)
weight -= O.weight
Enter(obj/O)
//only allow entrance if weight is within the limit
if(O.weight + weight <= max_weight)
return ..()To see the advantages of this arrangement, imagine that there are certain situations in which an object may be created directly within the mob’s inventory without the mob picking it up. You can still run it through your normal movement rules without calling get().
mob/verb/wish()
var/obj/O = new() //create it with loc=null
if(O.Move(usr)) //and then move it into inventory
usr << "Your wish has been granted!"
else
usr << "You are too greedy!"
del O