With kind regards,
Geoffrey De Smet


Andrew Waterman schreef:

Hi,

I've been looking through my solver logs and on a problem i have posed, the solver seems to first initialize and setup a best score:

INFO: Initialization time spend (3) for score (-5000004.0). Updating best solution and best score.

However, this score is not correct.  I use collect to load Tokens of a certain type for my game, and those that are found, penalize the system with a constraint:

rule "Too much unclaimed territory"

   when

       $list : ArrayList ( size > 2) from collect  (

           Token ($type : type == TokenType.UNDEVELOPED))

   then

       for (int i = 0; i < $list.size(); i++) {

           insertLogical (new IntConstraintOccurrence (

               "Too much unclaimed territory", ConstraintType.NEGATIVE_SOFT, 3, $list));

Doesn't this insert the same logical fact in a loop? So only 1 instance actually remains in the working memory?
If you want to have to list.size() affect the score, just do:
 3 * list.size()

       }

end

Why use collect anyway?

    when
        $t1 : Token ($type : type == TokenType.UNDEVELOPED, id1 : id)
        $t2 : Token ($type : type == TokenType.UNDEVELOPED, id > id1, id2 : id)
        $t3 : Token ($type : type == TokenType.UNDEVELOPED, id > id2, id3 : id)

// maybe you need things like this: not Token ($type : type == TokenType.UNDEVELOPED, id > id3)
    then
 insertLogical (new IntConstraintOccurrence ("Too much unclaimed territory",  ConstraintType.NEGATIVE_SOFT, 3, $t1, $t2, $t3));

However, the initial score does not seem to account  for these inserted facts.  Due to this, all improving solutions are rejected, and I see no change in the solution the solver finds and my starting solution.  Any suggestions on how to delay initialization?  Or get the starting score to take into account this constraint (I've made it SOFT so the values aren't so hard to follow in the logs, it was initially a HARD constraint).  I'd love to find a way around this problem, I've spent most of the day playing with different configurations (acceptors and foragers) trying to find a configuration that works for this base problem.

best wishes,

Andrew

---------------------------------

Andrew Waterman

San Cristóbal de las Casas, Chiapas, Mexico

+52 1 967 107 5902

+1 510 342 5693

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