AI acting weird

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blackout_alex
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AI acting weird

Post by blackout_alex »

I have been working on some AI, it doesn't do much but walk around and change direction every few seconds, but it seems to be acting weird. All of the AI end up near the bottom of the screen, even though it should be random. The random number assigned to "down" it 1. Is there a way that math.random(4) is selecting 1 much more frequently than other numbers? You can try it yourself:
random.love
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dreadkillz
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Re: AI acting weird

Post by dreadkillz »

I got an error message for HardonCollider. You should repackage your .love with it?

EDIT: Nevermind got it working just removed the require line for HC
Last edited by dreadkillz on Tue Jun 19, 2012 8:24 pm, edited 1 time in total.
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OmarShehata
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Re: AI acting weird

Post by OmarShehata »

Hmm, code seems to be correct.

If you're not happy with it currently you could always add an extra check so that if he's down, he's more likely to go up. And same for all directions.

Code: Select all

if AiIsGoingDown then
    local normalized = (ai.y - (screenHeight/2)) / (screenHeight/2) --Gets a value between 0 and 1. 0 means least down (in the center) and 1 is most down, bottom

if math.random() <= normalized then --As the "normalized" gets bigger, the more likely this check will be true
  ChooseAnotherDirection()
end
    
end
Where it would keep running "ChooseAnotherDirection()" until the AI is no longer going down.

Or a much simpler way, just not make it go towards a certain direction when it's past a certain limit. Etc... there's a lot of way you can experiment to tweak the AI's performance.
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dreadkillz
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Re: AI acting weird

Post by dreadkillz »

I think I figured out what's wrong with your code. You should do this:

Code: Select all

math.random(0,3) -- choose between [0,3]
You have math.random(4) which chooses a number between 1 and 4 so your AI never actually go up because up is 0.
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OmarShehata
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Re: AI acting weird

Post by OmarShehata »

dreadkillz wrote:I think I figured out what's wrong with your code. You should do this:

Code: Select all

math.random(0,3) -- choose between [0,3]
You have math.random(4) which chooses a number between 1 and 4 so your AI never actually go up because up is 0.
Boy do I feel stupid for missing that.

But this is why I always do math.random() * 4 instead, and round it if needed.
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