Module generation 

Structure piece generation context.

Structs

GenerationContext

Per-chunk context shared by every structure’s findGenerationPoint.

GenerationStub

Result of a successful Structure::find_generation_point.

TerrainProbe

An off-chunk height and opacity probe.

Enums

ColumnBlock

Block classification in the base-noise column (no surface rules).

Traits

StructureGenerationContext

Terrain, biome, and template queries exposed to structure algorithms.