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Why is the game sending all this data which is essentially just hidden by the UI? What is the point of sending enemy location and health data when they aren't n

Why is the game sending all this data which is essentially just hidden by the UI? What is the point of sending enemy location and health data when they aren't near/visible to the player? For a non game dev like me it sounds like wasted bandwidth and a way to enable wallhack.

Risord 6y ago
Because knowing which data is hidden by UI from server is hard problem. To achieve real-time feeling game apply (most) your inputs immediately without having to wait relatively long time confirmation from server. So if you decide to push button and peek around corner you expect to see enemy immediately but server will know about your peek "much" later. You can for sure limit some information by locations but you always must leak more than it's actually seen by client. Also it isn't easy to solve: can any part of volume be seen from another volume inside arbitrary 3D environment. Enemy size and movement through network frame => players all possible eye positions. I think current best solutions rely on very rough (manual?) map piecing. So is it worth to invest for such thing that makes some cheats bit less powerful but cannot really prevent them.
- mrguyorama 6y ago
  Keep in mind that CS:GO is ALREADY built on very very old BSP maps, so knowing that some players aren't visible to others is super trivial, if not 100% accurate (ie it's a little conservative)
imtringued 6y ago
In warthunder this results in very noticeable pop in of enemy vehicles when you are using aircraft in realistic tank battles. The rendering distance for both tanks and aircraft is the same but since aircraft are 2km above the ground their effective view distance is much shorter than that of a tank.
lwansbrough 6y ago
VALORANT (Riot’s new CSGO competitor) uses a fog of war technique which only sends data for players in a certain radius or cone I believe. It can be done, it’s just silly to expect Valve to make important and valuable changes like this to their game.

Risord 6y ago

Because knowing which data is hidden by UI from server is hard problem. To achieve real-time feeling game apply (most) your inputs immediately without having to wait relatively long time confirmation from server. So if you decide to push button and peek around corner you expect to see enemy immediately but server will know about your peek "much" later. You can for sure limit some information by locations but you always must leak more than it's actually seen by client. Also it isn't easy to solve: can any part of volume be seen from another volume inside arbitrary 3D environment. Enemy size and movement through network frame => players all possible eye positions. I think current best solutions rely on very rough (manual?) map piecing. So is it worth to invest for such thing that makes some cheats bit less powerful but cannot really prevent them.

mrguyorama 6y ago
Keep in mind that CS:GO is ALREADY built on very very old BSP maps, so knowing that some players aren't visible to others is super trivial, if not 100% accurate (ie it's a little conservative)

imtringued 6y ago

In warthunder this results in very noticeable pop in of enemy vehicles when you are using aircraft in realistic tank battles. The rendering distance for both tanks and aircraft is the same but since aircraft are 2km above the ground their effective view distance is much shorter than that of a tank.

lwansbrough 6y ago

VALORANT (Riot’s new CSGO competitor) uses a fog of war technique which only sends data for players in a certain radius or cone I believe. It can be done, it’s just silly to expect Valve to make important and valuable changes like this to their game.