Re: [robocup-rescue-s] agent position when receiving KA_HEAR_SAY

Dear Mattijs,

Just a few additional points on Mohammad's useful comments:

 KA_HEAR messages are received just before the next step
starts, so your agents does not know its position in the
new cycle. If you would like to process the messages after
your agent has received its new world-model, you can save
the messages your agent receives somewhere and postpone
the task of choosing and processing the appropriate messages
after your agent has received its new world-model.

Doing so has also some other merits the most important of
which is the possibility to use a better strategy to choose
the messages your agent would like to read. In other words,
if your agent, just after receiving a message, wants to
decide whether to select it for reading or not, it has to
decide only based on the sender of the current message and
its decision for the previous messages it has received in
the current step. As a result, strategies like 'first of
all, choose all the messages from your station and then if
you can still read messages, read as many as you can from
the civilians' would not be possible to implement. On the
other hand, if your agent saves all the messages it receives
and at the start of the next step decides to read the most
appropriate ones, it is potentially able to implement all
the possible strategies for choosing messages.

Regards,
Arash Rahimi

> Dear Mattjis,
> At the start of each cycle in simulation a KA_SENSE will be sent to each
> agent,
> and after that all KA_HEAR_* messages will be handed to agent.
> So, suppose you have got a KA_SENSE message and you send a AK_MOVE,
> this action will not be applied until the end of this cycle.
> so when the next KA_HEAR_* message arrives you are still in position
> you were at the start of cycle.
>
> have fun,
> Mohammad Mehdi Saboorian
> SBCe_Saviour
>
> On 2/6/06, Mattijs Ghijsen <mattijs@science.uva.nl> wrote:
>> Hi All,
>>
>> I have a problem determining an agent's position at the time it receives
>> a KA_HEAR_SAY message. When I send an AK_MOVE to the simulator, the
>> simulator receives it and processes it and in the next cycle I receive
>> an KA_SENSE with my new position on the map. If I receive an KA_HEAR_SAY
>> after sending the AK_MOVE but before receiving the KA_SENSE, what would
>> be my position on the map be at the time of receiving the KA_HEAR_SAY?
>> Is it the old position from before sending the AK_MOVE, the new position
>> when the AK_MOVE has been fully processed, or could it also be one of
>> the positions along the route the agent has traveled?
>> I would really appreciate if someone could give me some insight in this
>> matter.
>>
>> regards,
>>
>> Mattijs Ghijsen
>>
>> --
>>
>> Mattijs Ghijsen M.Sc
>> Human Computer Studies Lab
>> Kruislaan 419, Matrix 1, room 2.27
>> 1098 VA Amsterdam
>> The Netherlands
>> Email: mattijs@science.uva.nl
>> Phone: +31 20 888 4660
>> Fax: +31 20 525 6896
>>
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Received on Tue Feb 07 10:13:58 2006