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Simulations within simulations
From: |
Marcus Vinicius Pereira Pessoa |
Subject: |
Simulations within simulations |
Date: |
Wed, 3 Sep 1997 08:25:37 -0300 |
Hi all (Ken)!
Since Ken's last suggestion I thought and worked a lot in my simulation. I
ended choosing a solution in which I call a whole application by a function
(inspired in Merelo's Breeder Library):
float evalFunc( id<Chromosome> a ) {
float fit;
PplObserverSwarm * observerSwarm;
observerSwarm = [PplObserverSwarm create: globalZone];
[observerSwarm buildObjects: a];
[observerSwarm buildActions];
[observerSwarm activateIn: nil];
fit = [observerSwarm pplGo];
return fit;
}
Instead of using just one observerswarm I decided to maintain the two
applications completely separated. From [observerSwarm buildObjects: a] I
populate the model(it works), and from [observerSwarm pplGo] I receive a float
value representing the group's fitness (it isn't working yet). Every group will
be evaluated via this simulation, so it will be called for each group in each
generation.
I had no major problems to make [observerSwarm buildObjects: a], but I'm
having some trouble in changing the GUISwarm. I created a new class named
PplGUISwarm, that is the super class to PplObserverSwarm. PplGUISwarm has a
method called pplGo (- (float) pplGo). Inside pplGo I'm trying to call a
modelSwarm's method that will give the flat value to be returned. I had no
problems in compiling the code but the method neither work nor gives an error
message. I wonder if it may be a scope problem.
So, does anybody have a suggestion about how to make this method (-pplGo)
return a value, or any other alternative way to allow the evalFunc method to
receive a value?
A Note: Ken was not sure, but if I quit the inner application it doesn't end
the whole simulation, allowing to evaluate the next agent in a loop.
Thanks in advance,
Vinicius.
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