Struct RollbackBuffer 

pub struct RollbackBuffer { /* private fields */ }

120-frame ring buffer for prediction/correction rollback.

Exactly 1.0 second at 120Hz. Architecturally locked — never grows. Each frame stores a FrameSnapshot that references diffs in the DiffPool.

Implementations

impl RollbackBuffer

pub fn new() -> Self

Create a new RollbackBuffer. All 120 slots zeroed.

pub fn push(&mut self, snapshot: FrameSnapshot)

Record a frame snapshot. Overwrites oldest if buffer is full.

pub fn find_by_tick(&self, tick: u64) -> Option<&FrameSnapshot>

Find a frame by tick number. Returns None if not in the buffer.

pub fn latest(&self) -> Option<&FrameSnapshot>

Get the most recent frame snapshot.

pub fn count(&self) -> usize

Number of valid frames stored.

pub fn frames_forward( &self, start_tick: u64, end_tick: u64, ) -> FrameRangeIter<'_>

Iterate frames from start_tick to end_tick (inclusive) in forward order. Used for replay (old→new) after rewind.

pub fn frames_reverse( &self, start_tick: u64, end_tick: u64, ) -> FrameRangeReverseIter<'_>

Iterate frames from end_tick back to start_tick (inclusive) in reverse order. Used for rewind (new→old).