Crate terrain_codec 

Terrain processing utilities for 3D tile generation.

This crate ties together martini (RTIN mesh generation) and quantized_mesh (Cesium quantized-mesh-1.0 encode/decode) and adds higher-level utilities — most notably seamless vertex-normal computation from a halo-extended DEM grid, which keeps shading continuous across tile boundaries.

Re-exports

The two underlying crates are re-exported as modules, so downstream code can use them through this single dependency:

use terrain_codec::{martini, quantized_mesh};

Normals

See normals for the seam-free buffered-gradient normal algorithm and a simpler per-tile face-normal accumulator.

Heightmap codecs

See heightmap for Terrarium / Mapbox Terrain-RGB / GSI 地理院標高タイル encode ⇄ decode pairs.

One-shot heightmap → .terrain

See terrain for encode_terrain and friends, which run martini + quantized-mesh end-to-end (mesh, quantise, header, normals, encode) in a single call.

Web-mercator → geodetic reprojection

See mercator for MercatorDem, which resamples web-mercator (XYZ) DEM tiles — Terrarium / Mapbox Terrain-RGB and friends — onto the geodetic grid that terrain consumes.

Re-exports

pub use martini;

pub use quantized_mesh;

Modules

heightmap

Heightmap codecs for elevation tile formats.

layer_json

Cesium layer.json (TerrainProvider metadata) builder.

mercator

Reproject web-mercator (XYZ) DEM tiles onto a geodetic (EPSG:4326) grid.

normals

Vertex-normal computation for terrain meshes.

terrain

One-shot heightmap → quantized-mesh (.terrain) encoding.

tile_coords

Tile coordinate utilities for the tiling schemes commonly used with Cesium terrain and Web Mercator raster sources.