API to create entities with Id and to retrieve them via Id

[0nkery]

Hi, thanks for awesome library!

I'm working on multiplayer client/server game. Would be awesome to have an API to create entities with specific Id (since all entities managed by server and server assigns Ids to them) and retrieve them via specific Id (e.g. to apply updates coming from server).

Currently I'm using NetworkId component and sending updates from server in map<Id, Update>. For player character entity I created Controllable flag-component which helps to find the entity I need.

But it doesn't feel right. Maybe there is a better way to design such system using tools already provided? Or maybe you'll consider to add APIs I described?

[torkleyy]

What you're doing sounds pretty good already! Networking is a common thing, so I do want to have this in Specs. And the good news is that there already is something: the saveload module created by @omni-viral. It's a really great start for this, but lacks some docs and has some limitations currently, thus I started working on an overhaul in this PR. I think I can finish it tomorrow if I don't forget it.

[0nkery]

Thanks for reply. I suppose it's unreleased so I'll wait til release. :)