Warning

This repository is archived and no longer maintained. The slow animation fix now lives in GameFixes_mm, one Metamod:Source plugin that bundles all of my CS2 server fixes. Each fix is turned on or off on its own in the config. Release binaries here were built against an older Metamod and may not load on current Metamod builds (plugin API 18).

Migrating to GameFixes_mm

1. Remove addons/slow_animation_fix/ and addons/metamod/slow_animation_fix.vdf from your server.

2. Install the latest GameFixes_mm release.

3. Enable the slow_animation block in addons/game_fixes/game_fixes.ini:

   "slow_animation"
   {
   	"enable"	"1"
   }
   

Issues and PRs go to GameFixes_mm.

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SlowAnimationFix_mm

Metamod plugin fixing slow-motion/sluggish animation bug on CS2 servers.

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Problem

After a CS2 server has been running the same map for a long time, curtime in CGlobalVars accumulates as a 32-bit float. As it grows, floating-point precision degrades — at ~24 h uptime the precision drops to half a tick, at ~48 h it exceeds a full tick interval. This causes animation, movement, and lag-compensation to produce incorrect results.

Valve never added a reset mechanism for curtime in any code path.

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What it does

On every map start (StartupServer) the plugin snapshots the current map name. Then, every 30 minutes, a repeating timer checks the server:

• Player slots 0–63 are scanned for real players (bots and GOTV are ignored via the FL_FAKECLIENT flag).

• If at least one human is connected, nothing happens — the check simply runs again 30 minutes later.

• If the server is empty, a changelevel back to the same map is performed, resetting curtime:

  • Regular map — calls IVEngineServer2::ChangeLevel directly.
  • Workshop map — issues a ds_workshop_changelevel <map> server command (detected via IsMapValid).

The timer survives map changes, so the cycle continues indefinitely.

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Result

• Server can run indefinitely on the same map without the slow-motion bug appearing
• No manual restarts required
• Zero impact during active gameplay — the reload only ever happens on an empty server
• Fully self-contained — no external Utils/Players plugins required

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Notes

• Uses a self-contained scheduler (scheduler.h / scheduler.cpp) ticked from ISource2Server::GameFrame, modelled after Source2Toolkit.
• Player detection is done directly through the entity system (CBasePlayerController + schema fields), no external player-manager plugin needed.
• Tested on 64-tick dedicated servers.

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Requirements

• Metamod:Source (CS2)

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Author

Slynx (˙·٠● S l y n x ●٠·˙)
https://slynxdev.cz