Tracking fire events.

[headswe]

https://gfycat.com/DimwittedSlimyAssassinbug <- (yellow haze)

[Verox-]

This is actually relatively simple to implement and has been the number 1 most requested feature since release, however, there is a major blocker preventing implementation right now...

Chrome currently has issues dealing with the extremely large replays we create resulting in a crash if the uncompressed replay is above ~100MB. If we start adding additional information to the replay file it's going to render the replay system almost useless on Chrome, which is pretty much out of the question given the overwhelmingly vast majority of users are on Chrome. From my preliminary tests you can almost guarantee a x2-x5 increase in replay size when adding bullet data to the replay, depending on the level of detail and amount of data you want to include.

To get this working there's going to need to be some major changes to the architecture of the entire system:

• We can scrap the current JSON replay format for something more compressed. This can be something pre-existing like MsgPack (which incidentally is the easiest to implement given it's close ties to json) [http://msgpack.org/index.html] or some proprietary byte format which is guaranteed to give us the smallest replay file size at the expense of being hard to implement and maintain.
• We can replace the 'frame-based' replay format with an 'event-based' format. The current 'frame-based' format has a lot of redundant data which could potentially be eliminated. Ideally this should be done at some point anyway, it better fits the idea of a replay system, but it's a lot of work.
• We can do some combination of the two to get the absolute smallest replay but it's going to effectively be a re-write all the way from mod to extension to web at that point.
• We can find some method of getting the current method to work in Chrome with larger replays. JS FileAPI has some extensions which lets JavaScript write to and read from temporary folders in the works but they're a few years out from being standardized and ready for production (boo!).