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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001777||Zandronum||[All Projects] Suggestion||public||2014-04-10 19:08||2019-06-07 20:04|
|Target Version||Fixed in Version|
|Summary||0001777: Serverside demos|
|Description||So I've been doodling about the possibility of serverside demos. I still want to do them and here's my thoughts about it|
The serverside demo will largely be like the clientside demo, with a few differences. It will begin when the first player enters the server and ends when the last player leaves. The server doesn't need to authenticate itself (duh) so the demo just starts off with a snapshot of the level followed by action.
The bulk of the demo will consist of every server command that is sent that does not have SVCF_ONLYTHISCLIENT set. The gist of the idea is to have an 'imaginary client' 'connected', like a big brother really, thus whatever is broadcasted needs to be recorded. amirite
The demo needs a constant consoleplayer, which the server lacks. Thus, the last player slot, i.e. index 63, will be reserved for use as the serverside-demo consoleplayer. This means sv_maxplayers will be capped to 63 maximum while the server records a demo. Not even the 'localhost hack' thing is to be able to get the 64th slot.
The userinfo of the consoleplayer I haven't thought out yet, but not a lot matters other than the name. I'll probably use "<server>" for the purpose as it's reserved like that. The consoleplayer will spectate at all times and will just sit and idle.
The file extension of the demo will be ".svd" to distinguish it from clientside demos, however the format is the same and the extension only serves for quick identification. For the actual distinguishment of the demo code-wise, I'll add a byte into the header to dictate whether it's a serverside or a clientside demo. zcinema will be updated accordingly.
|Now that the netcommandification has been done I'm working on implementing this. I got stuff done last night but currently am struggling getting it to actually work...|
Torr Samaho (administrator)
|BTW: Why do you need a constant consoleplayer? Can't you do something like I did for the free spectate mode in client side demos?|
|Even with free spectate mode there is still the recorder of the demo as the consoleplayer. With serverside demos there is no constant consoleplayer because the server, which records the demo, doesn't have one.|
Torr Samaho (administrator)
|Sure, but I'm wondering for which technical aspect you need a constant consoleplayer.|
|I can't really feed Zandronum an invalid consoleplayer while playing back a demo, can I? Some consoleplayer must exist and the codebase assumes it's constant.|
Torr Samaho (administrator)
The server can handle the whole game logic without a console player, so I think that one should be able to make the demo playback work without a true console player. From the top of my head the only thing I know that is necessary to be valid (without changing large parts of the code) is players[consoleplayer].camera.
Changing players[MAXPLAYERS] to players[MAXPLAYERS+1], setting consoleplayer to MAXPLAYERS and putting a valid camera (see demo_spectatefreely) in players[consoleplayer].camera could be a good start. But you can also first try to get this to work your proposed reserved consoleplayer slot and we worry about getting rid of the reserved slot later.
I'm assuming each map change would cut a demo off and start a new one?
The current way we make demos is painful. All other ports for client demos are fragmented per each map.
I was thinking about starting a demo when a server becomes populated and ending it when the server becomes full.
The big problem here is that all this defensive coding that we've done in Zandronum is biting me in the ass here. A lot of our safety checks locks the serverside demo recorder out from a lot of functions. I don't know what to do here.
I wonder then if it's worth forcing -1 player for servers that want to record serverside demos? Then allocate a player?
Updating everything to allow for serverside demos sounds like a major task
|Why you can't just save all client commands into a file and then read it back w/ proper settings like map, CVARs, etc, emulating the server getting those commands from real players?|
edited on: 2014-06-12 21:50
Quote from ZzZombo
Care to elaborate?
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|Supporters:||Absolute Zero WaTaKiD Razgriz Argentum capodecima AlexMax Korshun|
|Opponents:||No one explicitly opposes this issue yet.|
|2014-04-10 19:08||Dusk||New Issue|
|2014-04-10 19:08||Dusk||Relationship added||related to 0001694|
|2014-04-10 19:08||Dusk||Summary||Serverside demos (implementation draft) => RFC: Serverside demos (implementation draft)|
|2014-04-10 19:10||Dusk||Description Updated||View Revisions|
|2014-04-10 19:10||Dusk||Status||new => feedback|
|2014-04-11 14:52||Dusk||Additional Information Updated||View Revisions|
|2014-04-17 11:42||Dusk||Note Added: 0008596|
|2014-04-17 11:42||Dusk||Status||feedback => new|
|2014-04-17 11:42||Dusk||Assigned To||=> Dusk|
|2014-04-17 11:42||Dusk||Status||new => assigned|
|2014-04-17 11:42||Dusk||Description Updated||View Revisions|
|2014-04-17 11:42||Dusk||Additional Information Updated||View Revisions|
|2014-04-17 11:42||Dusk||Summary||RFC: Serverside demos (implementation draft) => Serverside demos|
|2014-04-17 17:31||Torr Samaho||Note Added: 0008597|
|2014-04-17 17:38||Dusk||Note Added: 0008599|
|2014-04-17 18:38||Torr Samaho||Note Added: 0008601|
|2014-04-17 18:57||Dusk||Note Added: 0008602|
|2014-04-17 20:18||Torr Samaho||Note Added: 0008604|
|2014-05-04 02:16||Dusk||Relationship added||child of 0001793|
|2014-05-04 02:16||Dusk||Relationship replaced||parent of 0001793|
|2014-05-04 02:16||Dusk||Relationship deleted||related to 0001694|
|2014-06-11 17:02||Watermelon||Note Added: 0009081|
|2014-06-11 18:39||Dusk||Note Added: 0009092|
|2014-06-11 18:53||Watermelon||Note Added: 0009094|
|2014-06-12 17:23||ZzZombo||Note Added: 0009148|
|2014-06-12 21:50||Dusk||Note Added: 0009177|
|2014-06-12 21:50||Dusk||Note Edited: 0009177||View Revisions|
|2014-06-13 13:03||ZzZombo||Note Added: 0009183|
|2019-06-04 21:54||Dusk||Status||assigned => new|
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