Re: [robocup-rescue-s] Starter Questions

Hi.

Adolfo Bravo Ferreira wrote:
>
> Hi folks,
>
> Im starting with YAB API using NetBeans and I will ask you a *few* questions:
>
> 1) Does a Fire Station / Ambulance center / Police Office / Refuge gets burned ? If it does will I loose the same score as a normal building?

This is an option in the fire simulator. I think by default they do not
burn, but you probably shouldn't rely on this.

> 2) Whats the purpose of a Fire Station / Ambulance center / Police Office / River ? Only to inform ?

The three centres are basically for communication. In versions before
0.50 (and 0.49.9+) communication could only occur between a platoon
agent (e.g. fire brigade) and other platoon agents of the same type and
with the corresponding centre. Centres could communicate with each
other, too. So, for a fire brigade to send a message to an ambulance
team the message had to go:

Fire brigade -> Fire station -> Ambulance centre -> Ambulance team

With the new communication architecture this restriction is lifted, but
in the future we will probably make the communication more realistic.
For example, platoon agents might only be allowed to listen to 1 channel
but centres could listen to several channels.

Rivers are not used at the moment.

> 3) Does AmbulanceTeam / FireBrigade / PoliceForce / car gets burned too ? Or only Civilians? If my rescue team gets burned I need to bring them to a Refuge to restore their hp ?

Platoon agents can get burned and trapped, just like civilians.
Returning to a refuge will remove damage, but not restore lost HP.
Damage is the number of HP lost each turn due to injury.

For example, my fire brigade has 1000HP and a damage of 50. Next
timestep it will have 950HP, then 900 and so on. If it returns to a
refuge then it will have 900HP and 0 damage so the HP will stop
decreasing. If it gets damaged again in the future then the HP value
will start decreasing again. When HP=0 the agent is dead.

Cars are not used at the moment.

> 4) Can I center all strategy in a external class ? For example: All communication from all platoon comes to this peace of code and they decide what to do ?

The only restriction on code is that agents are not allowed to share
their world model. For example, in Java you can't have something like:

public class MyAgentClass {
        private static WorldModel modelForAllAgents;
        ...
}

because all instances of MyAgentClass will use the same WorldModel
object. The idea is that we're trying to model the real world and having
shared state like this is not realistic.

There is nothing stopping you having external classes for performing
computation, communication or anything else. Just make sure you don't
share state between agents.

> 6) Have any range for communication ? Agents can sense only 30m from their location. Does communication has any range ? An agent to communicate to another agent has any range limit ?

Voice messages have a range of 30m, agents can see only 10m. Radio
messages have infinite range, but only agents that are listening to the
right channel can hear them. Voice messages are assigned channel number 0.

> 7) Do I need to work with communication ? Can I compress this communication to store more data in the limit size?

Yes, and you probably should. Generally an agent gets more information
in a SENSE message than it can transmit via TELL messages, so you'll
need something to ensure that all your agents share relevant information
and coordinate effectively.

> 8) All the strategy does not need to run in the same time as the cycles right ?

No, you can implement it in any way you wish. Remember that the kernel
will only accept commands from agents for a short time after each sense
message, so make sure that you send your commands quickly after
receiving the sense message.

I hope that helps.

Regards,
Cameron Skinner.
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Received on Sat 16 Jun 2007 - 23:55:41 GMT