Cheaters Lament: passive anti-cheat system. More...

Functions
void	CheatersLament (NSClientPlayer, vector, float, float)
	Called by Nuclide within `SV_RunClientCommand()` every time an input packet is received. More...

Detailed Description

Cheaters Lament: passive anti-cheat system.

System designed to analyze movement deltas and warn about suspicious behaviour as it is happening.

Explanation

Intense movement comes with decreased accuracy. If a player is showcasing signs of above average reaction time and consistent success in trailing (and shooting) valid targets we are going to inform the server admin of suspicious behaviour.

The system does not act on its own, it merely gives feedback and expects the host to act upon it.

We can tally the feedback and create a score based on suspicious behaviour as a result. these results should ideally be made public to the other players so they themselves can make a choice.

Technical Deep Dive

We accumulate the camera angle deltas over time to track the average mouse movement intensity over a short period of time. waiting a full second will actually remove a full 360 degrees of delta. Then we also accumulate accuracy information, we increases a counter whenever the player is actively firing, while also aiming at an opposing player within an radius of less than 10 degrees (to compensate for rocket shots and othe projectile trails). Whenever the player is firing and not aiming with that level of precision, the counter goes down.

If the deltas together reach a high point together, that must mean that the player is having frantic mouse movements, combined with incredible hit accuracy.

The high point calibration is taken from analyzing various demos of known pro players as well as some cheating incidents.

Limitations

When going through teleporters, the angle deltas may be high enough to trigger false positives.

This is obviously not a perfect system, but it is to be used as a tool to assist in the decision making that goes into moderating a game server.

Function Documentation

◆ CheatersLament()

void CheatersLament	(	NSClientPlayer	playerEntity,
		vector	absAngles,
		float	buttons,
		float	timeLength
	)