Struct BufferedElevations 

pub struct BufferedElevations {
    pub elevations: Vec<f64>,
    pub buffer: u32,
    pub tile_grid_size: u32,
}

Elevations sampled on a grid that extends buffer cells beyond the tile on each side.

Used by buffered_gradient_normals so that adjacent tiles read the same DEM samples at any shared physical position. This is the same idea as a raster “buffer” or image “padding”: a strip of neighbour data around the tile that lets edge vertices compute the same gradient that the neighbour tile would compute.

Layout

Row-major, north → south, (tile_grid_size + 2*buffer) samples per side. The inner tile_grid_size × tile_grid_size block corresponds to the tile itself; the surrounding strip of width buffer cells is sampled from the neighbour tiles’ DEM (or any DEM source covering that physical area), so vertices on the absolute tile edge can still read their ±1 neighbours via the buffer cells.

Fields

elevations: Vec<f64>

Elevation samples ((tile_grid_size + 2*buffer)² entries, row-major north → south, NaN allowed for missing data).

buffer: u32

Number of buffer cells on each side.

tile_grid_size: u32

Tile grid size (e.g. 65 for a Cesium-style 64-cell tile). The full buffered grid is (tile_grid_size + 2*buffer) per side.

Implementations

impl BufferedElevations

pub fn new(elevations: Vec<f64>, tile_grid_size: u32, buffer: u32) -> Self

Create a buffer-extended elevation grid.

Panics

Panics if elevations.len() does not equal (tile_grid_size + 2*buffer)².

pub fn buffered_grid_size(&self) -> u32

Width/height of the full buffer-extended grid in samples.

Trait Implementations

impl Clone for BufferedElevations

fn clone(&self) -> BufferedElevations

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BufferedElevations

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

Formats the value using the given formatter.