Just been to a talk at Imperial College London, put on as part of the London Games Festival, presenting viewpoints form the games industry (Peter Molyneux and someone from Eidos) and from AI Academia. Very accessible and interesting.
The future of AI in games
London Games Festival
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4.10.06
peter molyneux, prof. mark cavazza., dr. simon colton
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intro
john cass, icl
article in the economist from the summer (CF)
next challenge is to develop believable characters and intelligences in game worlds
bring together two communities: the game devlopers from industry and artificial intelligence research community from academia
take industry to a new level
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peter molyneux
this is the most interesting area of game design to him
sorry – on behalf of games industry for grabbing the term AI and totally abusing it.
there is very little real AI in games
AI is mistaken for
– navigation
– avoidance
– crude simulations
– scripted behaviour
this is where we are, where do we want to be?
we need a whole raft of REAL AI and we’re starting to get the processing power to do it. next gen consoles could be the key.
– agent AI: need for convincing characters, recognizing what you are doing as a player. we are doing so much more as players – more freedom, more emotion. fable2: friendship, family – relationships… how do this convincingly?
– cloning AI: online is here to stay and this creates big problems… what about having a clone of yourself to remain in a persistent world so you can stay ‘present’ when you should go to sleep (UK vs. australia)
– learning AI – adapting to players and play.
– balancing AI: we’ve failed because we are not mass market – we only appeal to a very small audience… biggest game = 20m should be 200m… one of the reasons we have not got the reach is that we have no way to balance the difficulty of the game – looking at how the player plays and balance the game play accordingly (cf. czymihalyi flow, robin hunicke’s work)
AI future – will change the way that games are designed, create new types of game, create unique experiences… my game experience will be different from yours. far more realistic worlds can be created… visually we are getting close, but need great AI to back this up otherwise they will feel flawed. i will be able to stand up in 5yrs time and say look at how games have changed due to AI.
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DR. MARK CAVAZZA, UNIVERSITY OF TEESIDE
AI for interactive storytelling
‘long term endeavor to reconcile linear story and interaction’
reincorporate aesthetic qualities of linear media
character-based storytelling: Hierarchical Task Network Planning (AI technique – look up?) to describe characters roles.
AI maintains consistency of the story, while allowing adaptation… but often driving towards satisfying conclusion (interactive storytelling is not just changing the ending!)
sitcom generator: each characters role is described as a HTN plan. (modelled on ‘Friends’)
dynamic interactions between characters contribute to generating multiple situation not encoded in the original roles.
sitcom chosen to test the theory – as they are essentially/generally simple story forms (not shakespeare!)
we are generating a lot of stories and a lot of them are rubbish… need to filter these… and we can only generate about 6mins…
what’s the diff between this and The Sims? Sims have no narrative drive, they react (narrative is in the eye of the beholder)
every time these characters act.. they have a plan.
silent movies atm, but next step is dialogue.
this is very processing power intensive, but making progress with small scaling demonstrations. (shows one) Scalability is not really there atm.
real challenge is to develop true interactive storytelling capabilities.
The world is an actor: worlds behaviour drives narrative events. blurring the boundaries of physics and AI – the world is ‘plotting against the character’… inspired by the ‘final destination’ movies!
the whole environment ‘has a plan’
its easy to look clever in AI in small exmaples, the real challenge is scability… but we think the principles here are sound.
(doing research project with DTI/Eidos)
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Dr. Simon Colton
AI and Games – Do’s and Don’ts
(games industry)unhealthy obsession #1: the modeling of opponents
(AI academia) unhealthy obsession #2: playing board games
From the machine learning journal: ‘learning to bid in bridge’ is a 30 yr project and it’s still going!
multiple mismatches in these two worlds
– what AI in games have low ram, low cycles, low time
– AI agents really want lots of ram, time, cycles
– ‘An AI’ that is referred to in games does not exist as termed by academia… a ‘complete AI’ would have emotional intelligence, reasoning, etc…
we’re developing AI the wrong way round – higher reasoning rather than basic instincts (cf. rodney brooks)
– ‘playing chess is a doddle compared to avoiding a tiger’
– AI researchers think it’s about BEATING the player, whereas games industry want AIs to help engage the player further in the game world.
so, what else can we do
– data mining game-play data
— changing how the game plays
– affective computing (HCI)
— how to tell from a players face what their emotional response is and changing game-play
– automatic avatars (to step in your place for sleep and toilet breaks!)
– but could be most useful in the design stage
comparison to the biotech industry
is designing a game more difficult than designing a drug? maybe? do drug companies have more funds? more IP issues? maybe?
BUT – drug companies absolutely make more use of AI in their design process than the games industry…
picks and shovels (where the money is) – getting the computer to program itself (misused phrase,but.. )
– machine learning
– genetic programming
— combining gives more than the sum of parts
one possible approach
evolutionary approach enables you to generate new entities for games – NPCs, cars, object… program AIs to use middle-ware to create these things
AI makes 100 bad models of a football – choose best 10 then breed… 1000s of generations later get valuable assets…
machine learns your aesthetic as a designer…
AI for game environment design
possible human-computer interaction in the design phase of games
designer creates a few building in his/her style
AI takes over and creates rest of city, designer refines the process…
great at design stage, but possibilities at run-time…
now the hard part: it’s still not easy to use AI/machine learning techniques in the off the shelf manners
– the best techniques come with a human (expert)
majority of AI academics don’t know how games are designed – start of a conversation?
summary: good AI opponents still a way off
AI people should think about engaging rather than conquering opponents
games people should think more about using AI tools in the design phase.
google: “AI bite”
Petafloptimism 