velven wrote:
Hi everyone, I'm new to Jess and I have some questions
1) I'm using (mapclass) to map my protege classes into jess, but I found
What is (mapclass), please?
that the function maps all userdefined slots to be multislots although i
have set them to be required single cardinality and integer type in protege.
ie. the generated is (multislot :X-coordinate) when what i need is (slot
:X-coordinate (type INTEGER))
The trouble occurs when i need to get the value to Java and it is identified
as a list and I cannot use (slot-get) as only the facts were being modified
during runtime (...slot-set is too costly)
What is (slot-get) or (slot-set)?
Though conversion is possible, I'm just wondering if theres a better way to
do it as the conversion seems abit wasteful and costly to my simulation's
execution.
2)I have this rule
(defrule moving_aside
?node1<-(object (is-a Agent)(:NAME ?n1)(:X-coordinate ?x1)(:Y-coordinate
?y1)(:Behaviour ?b1&~"move_aside"&~"look_for_leader"))
?node2<- (object (is-a Agent)(:NAME ?n2&~?n1)(:X-coordinate
?x2&:(>= 1
(abs (- ?x2 ?x1))))(:Y-coordinate ?y2&:(>= 1 (abs (- ?y2 ?y1)))))
=>
(modify ?node1 (:Behaviour "move_aside"))
)
Basically this rule checks for another agent beside it and set its behaviour
to another state if present.
According to my test case, though this rule is never fired, its presence
alone slowed down the simulation with 200 agents.
The checks resulting from the LHS are exercised each time "object" facts
are asserted or modified. The *firing* of this rule with its simple RHS
isn't the expensive part.
Since you write that X-coordinates are INTEGER, a comparison using
(:X-coordinate ?x2&~?x1) might be a little faster. (But isn't either
x-coordinate differs *or* y-coordinate differs sufficient to warrant the
change of :Behaviour? As it stands now, *both* must differ.)
-Wolfgang
Is this due to the way i have written my rule such that for each agent,
atleast
(:X-coordinate ?x2&:(>= 1 (abs (- ?x2 ?x1))))
had to be checked by jess with another 199 agents? or something else?
welcome any suggestions to optimise, Thank you for your time
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