Struct NeighborList 

pub struct NeighborList { /* private fields */ }

A simple grid-based neighbor list for SPH.

Divides the domain into cells of size h and assigns each particle to a cell. Finding neighbors then only requires checking the local cell and its 26 neighbors.

Implementations

impl NeighborList

pub fn new(origin: [f64; 3], domain_size: [f64; 3], cell_size: f64) -> Self

Create a new neighbor list for the given domain.

pub fn build(&mut self, positions: &[[f64; 3]])

Clear all cells and re-assign particles.

pub fn neighbors(&self, pos: &[f64; 3]) -> Vec<usize>

Return the neighbor particle indices for a given particle. Checks the particle’s cell and all 26 neighboring cells.

pub fn num_cells(&self) -> usize

Total number of cells in the grid.

pub fn grid_dims(&self) -> [usize; 3]

Grid dimensions [nx, ny, nz].