Re: [Swarm-Support] setting flags for agents

[Glen E. P. Ropella]

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Steve Railsback wrote:
> address@hidden wrote:
>> I am trying to give agents memory of where they have walked.  To do
>> this I am creating a flag in a class Cell (similar to HabitatCell in
>> StupidModel). Currently, all agents can set and get this flag by:
>>
>> Cell flags = (cell) cellWorld.getObjectAtX$Y(myX, myY);
>> flags.setFlag(num);
>> flags.getFlag(num);
>>
>> As each agent walks through the Grid2dImpl space they change the flag
>> from a 0 to one.  The agents can then see where others have walked and
>> not walk on those spaces.  I do not want this feature.  I would like
>> the agents to set and get their own flags, which will allow them to
>> only see where they have walked. Any suggestions on how to do this
>> with Java Swarm 2.2.
> 
> One alternative is for each agent to keep a list of cells it has been
> in, as its "memory". The agent can check whether it has been to some
> cell simply by whether its list of previously-visited cells contains
> that cell.

Another mechanism would be to give each agent an id (bit, integer,
string, real, object, whatever).  At each grid point, place a list of
id's (or some other container object).  When an agent walks over a spot
it deposits its id in that grid point.  And when an agent looks at a
grid point, if it sees its id in the container, then it knows its been
there.  It only has to recognize its own id.

cellWorld.getObjectAtX$Y(myX, myY).deposit(myID);
.
.
.
if ( ! cellWorld.getObjectAtX$Y(thatX, thatY).contains(myID) )
   moveTo(thatX, thatY);

- --
glen e. p. ropella, 971-219-3846, http://tempusdictum.com
... given any rule, however "fundamental" or "necessary" for science,
there are always circumstances when it is advisable not only to ignore
the rule, but to adopt its opposite. -- Paul Feyerabend

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