Then adjust the proportion of fruits on each wheels so that the EV of the whole system is about 0.51 (normalized). At the old gambling company, we had a dude who's job it was to calculate those things.Īssuming you just want a super simple slot machine, I'd suggest that you pick a small number of different fruits, and a simple payout table. Working all of this out so that the house takes just a little bit more than it pays out, while still entertaining players, is serious probstat work.

The expected value can be adjusted by changing the values paid for the various winning combinations. Probability of wins can be adjusted by either added or removing winning combinations, or by changing the proportion of different fruit on your wheels. All combinations not appearing in the table aren't considered winners. This table will have all winning combinations and what you win. This can be done just by taking random(), then animating to the proper index.Ģ) Map from indicated icons to payout using a 'payout table'. They should have an identical chance of falling on any icon on the wheel.

So, if you want to do it 'right', here's how you do it.ġ) Your wheels should be fair. Before I got into video games, I worked for a slot machine company making gambling products.

Slot machine programming logic