[mosh-devel] Mosh for roguelike games?

[Keith Winstein]

Hello Hannes,

There's no fundamental reason that Mosh couldn't support an
application-specific local echo model. Look
in src/frontend/terminaloverlay.cc (
https://github.com/keithw/mosh/blob/master/src/frontend/terminaloverlay.cc)
for the current code.

You *might* be better off just writing your thing as a separate wrapper
program that the user would run before they run Mosh or SSH. (Look at
our src/examples/termemu.cc for an example of this.) This could just
interpret the user's keystrokes and do whatever you want with them, rather
than trying to be another part of Mosh itself.

Mosh itself benefits from having the prediction be tied in with the
networking, because we want to know which user keystrokes have been seen by
the server (in order to know whether our predictions were confirmed or
rejected). But if you're really just making a local user interface for a
particular application, there's a lot less ambiguity about trying to infer
if your "predictions" are correct and you could do this as a straight-up
wrapper program on the client side.

Good luck!

Cheers,
Keith


On Sun, Aug 18, 2013 at 5:24 PM, HannesJvV (alt email)
<slimkind7 at gmail.com>wrote:

> I understand Mosh uses a simplified model of server-side activity to give
> "intelligent local echo", but I'm not clear on the details. Can Mosh use
> application-specific local echo models?
>
> I'm asking because I would love to play Dungeon Crawl online but I live in
> Africa, far away from any server. Lag makes playing over SSH absolutely
> unbearable. I'm thinking that Mosh with crawl-specific local echo model
> could at least make the lag a lot more bearable and would be a big step
> forward for roguelikes in general.
>
> I understand that with roguelikes there would be many cases where Mosh
> wouldn't really help (just as with complex commands in Vim) and that this
> would be complicated to pull off. But simple things can go a long way: if
> I've been waiting for a response from the server for the past few seconds
> after giving a movement command, I might as well check out my spell list or
> inventory or examine a monster while I'm waiting for it. This is impossible
> with SSH, but I think it might well be doable with Mosh if it can take
> 'local echo plugins'.
>
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>
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