Struct FluidSnapshot 

pub struct FluidSnapshot {
    pub particle_count: u32,
    pub positions: Vec<u8>,
    pub velocities: Vec<u8>,
    pub checksum: u64,
    pub frame: u64,
}

Serialized fluid state for netcode

Fields

particle_count: u32

Number of particles

positions: Vec<u8>

Serialized positions (N * 3 * 16 bytes)

velocities: Vec<u8>

Serialized velocities (N * 3 * 16 bytes)

checksum: u64

State checksum for desync detection: FNV-1a 64 over the positions’ byte length (u64 little-endian) and bytes, then the velocities’ length and bytes

frame: u64

Frame number

Implementations

impl FluidSnapshot

pub fn capture( positions: &[Vec3Fix], velocities: &[Vec3Fix], frame: u64, ) -> Self

Create snapshot from fluid particle data

positions and velocities must describe the same particle set and so have the same length: particle_count is one count for both arrays, and FluidSnapshot::restore deserializes that many of each. Accepting a mismatch meant taking positions.len() as the count for both, so a longer velocity array had its surplus silently dropped on restore — data loss with no error, while FluidSnapshot::verify still reported a match because it compares checksums over the bytes rather than reading particle_count.

Panics

Panics if the two slices have mismatched lengths.

pub fn restore(&self) -> Option<(Vec<Vec3Fix>, Vec<Vec3Fix>)>

Restore fluid state from snapshot

pub fn verify(&self, positions: &[Vec3Fix], velocities: &[Vec3Fix]) -> bool

Verify checksum matches current data

pub fn size_bytes(&self) -> usize

Total serialized size in bytes

Trait Implementations

impl Clone for FluidSnapshot

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FluidSnapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.