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> Also cool to think about would be AI-vs-AI street fighter competitions. That's a fun idea. Provide an editor for the AI script files so you can program your

by coldpie 10y ago

> Also cool to think about would be AI-vs-AI street fighter competitions. That's a fun idea. Provide an editor for the AI script files so you can program your own AI, then inject that into the ROM and pit AIs against each other.

ilitirit 10y ago
You can do it using the techniques employed here: https://github.com/aikorea/strikersii_ai/tree/master/genetic https://github.com/aikorea/strikersii_ai/tree/master/genetic Demo: https://www.youtube.com/watch?v=k6Ir8yd9iOk https://www.youtube.com/watch?v=k6Ir8yd9iOk In terms of FGs, you would store the relevant game state as inputs and build a reward function around health, time, damage done etc. A relatively simple (and useful!) SFII AI would be one that tries to win by only using crouching medium kick, sweep and throw.
- coldpie 10y ago
  I just meant straight up using the scripting language described in the article to hand-code an AI.
  - ilitirit 10y ago
    Aah in that case if you're willing to forego the limitation of using the original AI instruction scheme, you can use the technique I recently used to build a training dummy. It's just a state machine that reacts differently depending on the state of various game variables (the same idea used by the original SFII code). The scripting language is Lua, and it's basically lines of code that go: if (distanceBetweenChars() < THRESHOLD) then chooseAppropriateMove(distanceBetweenChars()) end etc... Here's a demo of one that reads the distance between characters and either dashes in and does a low attack, or attempts to throw you. https://www.youtube.com/watch?v=R9THKU63viM https://www.youtube.com/watch?v=R9THKU63viM It's pretty simple to have this script run for Player 1 and Player 2. In a competitive environment (ie. when you have AI vs AI) the players involved would need to agree on certain limitations, otherwise it would be pretty simple to build an AI that reacts "instantly" to stimuli.
emodendroket 10y ago
Not exactly the same, but: http://www.usgamer.net/articles/salty-bet-is-about-to-become-your-new-obsession http://www.usgamer.net/articles/salty-bet-is-about-to-become...

by coldpie 10y ago

ilitirit 10y ago

You can do it using the techniques employed here: https://github.com/aikorea/strikersii_ai/tree/master/genetic https://github.com/aikorea/strikersii_ai/tree/master/genetic Demo: https://www.youtube.com/watch?v=k6Ir8yd9iOk https://www.youtube.com/watch?v=k6Ir8yd9iOk In terms of FGs, you would store the relevant game state as inputs and build a reward function around health, time, damage done etc. A relatively simple (and useful!) SFII AI would be one that tries to win by only using crouching medium kick, sweep and throw.

coldpie 10y ago
I just meant straight up using the scripting language described in the article to hand-code an AI.
- ilitirit 10y ago
  Aah in that case if you're willing to forego the limitation of using the original AI instruction scheme, you can use the technique I recently used to build a training dummy. It's just a state machine that reacts differently depending on the state of various game variables (the same idea used by the original SFII code). The scripting language is Lua, and it's basically lines of code that go: if (distanceBetweenChars() < THRESHOLD) then chooseAppropriateMove(distanceBetweenChars()) end etc... Here's a demo of one that reads the distance between characters and either dashes in and does a low attack, or attempts to throw you. https://www.youtube.com/watch?v=R9THKU63viM https://www.youtube.com/watch?v=R9THKU63viM It's pretty simple to have this script run for Player 1 and Player 2. In a competitive environment (ie. when you have AI vs AI) the players involved would need to agree on certain limitations, otherwise it would be pretty simple to build an AI that reacts "instantly" to stimuli.

emodendroket 10y ago

Not exactly the same, but: http://www.usgamer.net/articles/salty-bet-is-about-to-become-your-new-obsession http://www.usgamer.net/articles/salty-bet-is-about-to-become...