Module terrain 

Terrain elevation subsystem.

Structs

BackfillState

Per-tile record of which neighbour borders have been backfilled.

ElevationSourceDiagnostics

Diagnostics snapshot for an elevation source.

ElevationSourceFailureDiagnostics

Failure counters for terrain elevation sources.

FlatElevationSource

A flat elevation source that always returns zero elevation.

HttpElevationSource

An ElevationSource that fetches Terrain-RGB tiles over HTTP.

PreparedHillshadeRaster

Prepared hillshade raster derived from a DEM tile.

QuantizedMeshSource

HTTP-backed quantized-mesh elevation source.

TerrainConfig

Configuration for the terrain elevation system.

TerrainDiagnostics

Snapshot diagnostics for the terrain pipeline.

TerrainElevationTexture

GPU-sampleable elevation texture payload for a terrain tile.

TerrainManager

Manages terrain elevation data and mesh generation.

TerrainMeshData

CPU-side terrain mesh data ready for GPU upload.

Enums

TerrainError

Errors that can occur during terrain operations.

TerrainRgbEncoding

Encoding scheme for Terrain-RGB PNG tiles.

Constants

NEIGHBOR_OFFSETS

The eight (dx, dy) neighbour offsets – four cardinal, four diagonal.

Traits

ElevationSource

A source of elevation data for terrain tiles.

Functions

build_terrain_descriptor

Build a lightweight terrain descriptor that carries reusable-grid metadata and GPU-sampleable elevation payload without eagerly generating displaced CPU geometry.

build_terrain_descriptor_with_source

Build a lightweight terrain descriptor with explicit elevation-source mapping.

build_terrain_mesh

Build a terrain mesh for a tile, displacing vertex Z by elevation values.

build_terrain_mesh_with_source

Build a terrain mesh with explicit elevation-source mapping metadata.

elevation_region_in_texture_space

Remap a logical DEM region from interior tile UV space into the full texture UV space of a border-expanded elevation grid.

expand_with_clamped_border

Wrap a raw elevation grid in a 1-sample border, clamped to the nearest interior sample.

interior_dims

Interior (source) dimensions of an expanded grid.

materialize_terrain_mesh

Materialize displaced CPU geometry from a lightweight terrain descriptor.

patch_border_edge

Overwrite one border strip of target with edge data from neighbor, in place.

patch_changed_tiles

Run incremental backfill patching on all tiles affected by a set of newly loaded tiles.

prepare_hillshade_raster

Prepare a DEM-derived hillshade raster for a tile.

skirt_height

Compute zoom-dependent skirt height in meters.