Struct ggrs::SyncTestSession

pub struct SyncTestSession<T>
where
    T: Config,
{ /* private fields */ }

During a SyncTestSession, GGRS will simulate a rollback every frame and resimulate the last n states, where n is the given check distance. The resimulated checksums will be compared with the original checksums and report if there was a mismatch.

Implementations

impl<T: Config> SyncTestSession<T>

pub fn add_local_input( &mut self, player_handle: PlayerHandle, input: T::Input ) -> Result<(), GgrsError>

Registers local input for a player for the current frame. This should be successfully called for every local player before calling advance_frame(). If this is called multiple times for the same player before advancing the frame, older given inputs will be overwritten. In a sync test, all players are considered to be local, so you need to add input for all of them.

Errors

• Returns InvalidRequest when the given handle is not valid (i.e. not between 0 and num_players).

pub fn advance_frame(&mut self) -> Result<Vec<GgrsRequest<T>>, GgrsError>

In a sync test, this will advance the state by a single frame and afterwards rollback check_distance amount of frames, resimulate and compare checksums with the original states. Returns an order-sensitive Vec<GgrsRequest>. You should fulfill all requests in the exact order they are provided. Failure to do so will cause panics later.

Errors

• Returns MismatchedChecksum if checksums don’t match after resimulation.

pub fn num_players(&self) -> usize

Returns the number of players this session was constructed with.

pub fn max_prediction(&self) -> usize

Returns the maximum prediction window of a session.

pub fn check_distance(&self) -> usize

Returns the check distance set on creation, i.e. the length of the simulated rollbacks