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# haxe-ui
  • b
    haha
  • b
    WTH. How does that even manage to not break on floating point errors. 😄
  • l
    It's a hecking miracle I know
  • l
    but the engine is deterministic
  • l
    and i guess as long as whatever you're using follows the latest IEEE standard, the errors are also consistent across the board
  • l
    which I might add that Haxe's JSON stringifier is NOT compliant and has been the hecking bane of my existence getting .json saves for Line Rider to work
  • b
    I've always thought you can't get deterministic even with IEEE standard, but dunno how it is these days.
  • b
    E.g. (relatively old article now), but physics engine claims to support cross-platform determinism.
  • l
    This engine definitely proves it, though I'm not sure what it is that enables it
  • l
    The file I linked was from back when we all used the Flash version
  • l
    From 2010 I might add!
  • b
    I know flash and web, despite both using the same IEEE, had different result even on the same PC.
  • l
    Yes, this was a problem for us as well
  • l
    Between Flash Player 8 and 9 they had issues with float precision, FP8 being the more popular version at the then time thanks to Macromedia Flash 8, that was a common error
  • b
    Reading rapier docs, it's not so straightforward either.
  • l
    FP8's float precision had issues only on windows however, OSX and Linux had theirs working just fine
  • b
    Can't use 
    Math.sin
    stuff and such.
  • l
    in FP9 that was fixed
  • l
    No trig functions are used in the physics engine for LR
  • b
    I wouldn't mind creating something similar to line-rider for my portal some day. 😄
  • b
    Oh, cool.
  • l
    Half of that code is a haxelib actually, so if you want to use that, go right ahead
  • l
    it's MIT as well
  • l
    ``haxelib install hxlr``
  • b
    Would need to solve determinism first. 😄
  • l
    though the latest version is still tied to OpenLR, so some fixes will need to be applied
  • b
    Unfortunately it's also in the category of "needs DB" games. So that's at least 1+ years away for me.
  • l
    needs DB?
  • b
    I would make it part of my nextrealm portal stuff, which is all multiplayer web games.
  • b
    Would need to store the maps, and ideally hook it up to the planned user account system.
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