ijustneedamail's desync speeculations

[cb3hjb]

problem

Cars in KissMP sometimes end up in different places on each computer.

findings ^{_{probably maybe right}}

Car sync works like this on the client:
1. positional values(translative and rotative) of a vehicle are recieved
2. force to nodes is calculated and applied using the ping to the server (I forgot when the predict is called, I'll take a look)
meanwhile:
3. positional data is sent to the server

on the server side:
1. positional data is distributed every tick
2. other vehicle data every 5 seconds

experiments

implemented proper prediction of rotational force, the effect is negligable

speculation

• Could this cause issues with trailers which have no gearbox/electrics:

KISS-multiplayer/kissmp-server/src/lib.rs

Line 544 in e18a4a9

async fn tick(&mut self) {

• ping of other players not used (unless I missed something)
  I only saw some average of the ping to the server beeing used for the prediction

additionally

explanation of the code helpful