[epsylon]

The idea that floating point isn't deterministic is patently false. If it wasn't, that'd mean that every computer adds random noise to the calculation. That's nonsense. This myth seems to be propagated because fp is hard to work with and has a lot of quirks: its non uniform division of space, the x87 extended precision mode, the various rounding modes... But none of that stuff is intractable.

(Many games have shipped with fp in networked code. see http://gafferongames.com/networking-for-game-programmers/flo... and look for previous discussion here on HN, reddit...)