OpenEuphoria

RE: weights of nested containers

• Posted by "Derek Parnell" <ddparnell at bigpond.com> Feb 16, 2004
• 549 views

> -----Original Message-----
> From: Michelle Rogers [mailto:michellerogers at bellsouth.net]
> Subject: weights of nested containers
>
>
>
> I am writing a mud progam in Euphoria.  Currently I have each
> character with
> a certain amount of strength.  Depending on their strength,
> they can pick up
> a certain amount of weight.  They can even pick up other
> characters, if they
> are strong enough to pick up the weight of the other character.
>
> The way I currently do this is that the weight of the person
> being picked up
> is evaluated.  If they are too heavy, a message is given.  If
> they are not
> too heavy, the person picks them up.
>
> However, here's the problem, what if you are trying to pick
> up a person, who
> is carrying a person, who is carrying a person, who is
> carrying a person,
> etc..etc..
> I cannot get a logic in my head that would allow you to go through an
> unspecificed number of  "carriers" and check the weight of
> everything they
> are carrying.  This COULD be solved by just saying you can't
> carry someone
> who is carrying someone else....However, I will have the
> problem again, when
> I have to deal with things like....a backpack that contains a
> pouch, that
> contains a bag...etc..etc...

How about something like this...

  function CalcWeight( object pHolder)
    atom lWeightSoFar

    lWeightSoFar = pHolder[kWEIGHT]
    for i = 1 to length(pHolder[kCarrying]) do
       lWeightSoFar += CalcWeight( TheWorld[ pHolder[kCarrying][i] ] )
    end for

    return lWeightSoFar
  end function

  TotalWeight = CalcWeight ( theObject )

This assumes you have a sequence that holds all the data for an entity, and
that sequence has a weight attribute and a list of things (an index into the
'world') that the entity is carrying.


> Can someone help me figure out a logic for this.
>
> There is a variable on every object in the mud that I call a "roomin"
> variable.  I started it to tell which room a player or object was in.
> However, each "thing" in the mud has a unique id. So, I've
> changed it so
> that the "roomin" variable doesn't have to point to a room.
> This is how you
> can be carried by another player.  Instead of your "roomin"
> variable having
> the id number of a room, it has the id number of the person
> carrying you.
> So, in theory, you are "inside" the person carrying you
> (according to the
> data structure, anyway)
>
> So, here's how it would work.  To know if someone is carrying
> someone, I
> have to check all players and see if their "roomin" variable
> is the id of
> the person I am checking.  That's easy enough and I can add
> the weights of
> ...let's call them the "first generation of people being
> carried".  However,
> it's when I start to check the roomin variables of everyone
> to see if they
> are carried by the first generation carriers, that I start to run into
> problems.  Sure, I can do that.  It's basically the same thing.
>
> But, how do I tell the code to keep checking until I've
> gotten to the end of
> everyone who's being carried (i.e.  the "last generation" of
> people being
> carried)?
>
> hmm...as I actually typed out an explanation..I'm getting a
> sort of a hazy
> idea..so I may figure this out..but I'm still going to post
> the message,
> just in case.
>
> Michelle Rogers
>
>
>
> TOPICA - Start your own email discussion group. FREE!
>
>