[Plugin] Fuzzy

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  • Fuzzy

    (Update: 2013/05/18)

    This plugin need to understand what is fuzzy, sorry I could not explain too much.

    "Fuzzy logic is a form of many-valued logic or probabilistic logic; it deals with reasoning that is approximate rather than fixed and exact."

    Anyway, it is used in some AI cases.

    Exampe, using fuzzy logic to simulate the behavior of fish.

    • touch screen to put feed


    Basic example of this sim-fish.

    • Edit the value of each input parameter, then press "execute" to see the value of outputs.


    The steps of using this fuzzy plugin are -

    1. Define memberships. This plugin provide 3 kinds of levels (3,5,7).

    2. Define fuzzy logic (rule). Put memberships for parameters of this action. For example,

    • "-hp" = N(negative) membership of variable of "hp"
    • "hp" = ZO(zero) membership of variable of "hp"
    • "+hp" = P(Positive) membership of variable of "hp"

    And expression:AND/OR/NOT for and/or/not logic.

    <img src="http://i1081.photobucket.com/albums/j352/rexrainbow1/screen_zpsefa8bf92.png" border="0">

    <img src="http://i1081.photobucket.com/albums/j352/rexrainbow1/3stages_zps0a4831ad.png" border="0">

    "-hp" : blue

    "hp": green

    "+hp" : red

    3. Set input variables by "action:Set variable value"

    4. Run rules by "action:Execute rules"

    5. Then the grade of each rule could be picked by "expression:OutputGrade" , user could pick the rule with maximum degree by "expression:MaxOutput".

    (In sim-fish example, I use "expression:MaxOutput" to be the command of the fish)


    Dependency of sim-fish capx





    fps monitor

  • Do you read minds? I was literally going to start working on a fish simulator today, and now a ton of the work is already started and functional. Thank you!

  • damn!

  • The plug-in Sounds great, but can you check the download links for the samples, they seem to be broken...

  • Animate

    Ooopps, the server had broken again. I had changed the download link, please download them again.

  • rexrainbow

    hello, I'm back again...

    I don't understand what the method "add rule" means... I know it's a logic, but I don't know the two parameters of it( Rule, Expression).

    Such as this rule: Add rule "eat" <- Fuzzy.AND("stomach",Fuzzy.OR("hp","-hp"))

    "eat" is a rule and "<- Fuzzy.AND("stomach",Fuzzy.OR("hp","-hp"))" is a expression.

    Both Fuzzy.AND(...) and Fuzzy.OR(...) return a value, right? But who receives this value? Is it "eat"? Is "eat" a variable, too? ...

    I'm completely confused...

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  • MelonGuns

    Fuzzy.AND(...) or Fuzzy.OR(...) will return a string (a rule) which is an expression about how to calculate the output variable (the rule name is also an output value).

    In these expressions,

    • an AND operation is to get the minimum value, an OR operation is to get the maximum value
    • the expression "-hp"/"hp"/"+hp" is the degree (the value is 0~1) mapping from input value. The mapping rules is defined at "action:define membership" , shown as first post.
  • rexrainbow

    oh!~I see..."eat" is both a rule name and a output value !!! THX!!! <img src="smileys/smiley12.gif" border="0" align="middle" />

  • Update

    Support official save/load.

  • Wow.... I had some hard time understanding how it worked, mostly because I didn't know how to use fuzzy logic.

    Great plugin !

    EDIT :


    oh!~I see..."eat" is both a rule name and a output value !!! THX!!! <img src="smileys/smiley12.gif" border="0" align="middle" />

    The output values seems to be directly the fuzzy evaluation of the rules of the same name, with the parameters applied.

    rexrainbow :

    The only thing I don't understand now is how you mix multiple rules in 1 output. Do you sum the different output of the rules (could be logic as each rules correspond to P,Zo or N of a value, could be complementary), or ponderate each output value to calculate the final output ? Maybe the max of every rule ?

    For example, if I take the "eat" rules :

    • if the stomach is positive, always want to eat
    • if the stomach is neutral, want to eat if hp is neutral or negative
    • if the stomach is negative, want to eat only if hp is negative too

    So in this case, if the stomach is 30% positive and 70% neutral, you should ponderate the result of the 2 first rules by their respective %, am I wrong ? (this question is more about checking I understand your plugin right)

    Last thing, could we, in this same example, mix all 3 rules in a "Fuzzy.OR" statement ? Something like






    (Just realised this last question is basicaly the same as the previous one...)

  • I also try to understand this kind of logic (c'est malin !)


    helps a lot.

  • Guizmus


    is ok.

    Actually, the OR operation is max , AND operation is min in this plugin.

    To mix multiple rules in 1 output, it uses OR operation.

  • Demo: Grade of color (Capx)

    • Input a color at left-up textbox
    • Then the grade of these 27 sample color will be shown at left side of each sample.
  • rexrainbow

    I’m learning fuzzy logic and I found your plugin very interesting. I’m currently trying to work with it and understand it. I have a question to see if I’m getting it right.

    Let’s suppose we have this Relationships between “100-point scale marks and fuzzy membership functions” in the URL bellow page 4.


    I’m supposing we are going to use membership with 3 levels (In this case Excellent won’t be taken into consideration)

    If I want to define the membership in construct 2 using your plugin, will it be like this:

    Define membership “marks”: P to “0, 60, 65”, S to “60, 65, 75, 80”, G to “75, 80, 85, 90”

    Thank you in advance.

  • ah11

    The functions of membersheep had been constrained in triangle. It did not support arbitrary function recently.

    You might consider use other tool to learn fuzzy instead of this plugin. This plugin is built for application.

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