Struct FlatChunkGenerator 

pub struct FlatChunkGenerator {
    pub layers: Vec<BlockStateId>,
    biome_id: u16,
    seed: i64,
    sea_level: i32,
    structure_generator: Option<StructureGenerator>,
}

A chunk generator that generates a flat world.

Uses a fixed biome (plains) for all positions, matching vanilla’s FlatLevelSource with FixedBiomeSource.

Fields

layers: Vec<BlockStateId>

Block layers from world bottom upwards.

biome_id: u16

The biome ID for plains (cached at construction).

seed: i64

World seed for structure placement.

sea_level: i32

Sea level for this flat generator’s dimension type.

structure_generator: Option<StructureGenerator>

Optional structure engine from flat structure overrides.

Implementations

impl FlatChunkGenerator

pub fn new( bedrock: BlockStateId, dirt: BlockStateId, grass: BlockStateId, ) -> Self

Creates a new FlatChunkGenerator.

pub fn new_layers(layers: Vec<BlockStateId>) -> Self

Creates a new flat generator with explicit block layers from bottom upwards.

pub(crate) fn new_layers_with_structures( layers: Vec<BlockStateId>, seed: i64, sea_level: i32, structure_generator: Option<StructureGenerator>, ) -> Self

Creates a flat generator with optional structure generation.

Trait Implementations

impl ChunkGenerator for FlatChunkGenerator

fn min_y(&self) -> i32

Returns the generator’s minimum Y coordinate.

fn gen_depth(&self) -> i32

Returns the generator’s vertical generation depth in blocks.

fn noise_biome(&self, _quart_x: i32, _quart_y: i32, _quart_z: i32) -> BiomeRef

Returns the generator biome at one quart position without requiring a loaded chunk.

fn spawn_height(&self, min_y: i32, height: i32) -> i32

Returns the generator-provided spawn height used before falling back to the surface heightmap.

fn structure_generator(&self) -> Option<&StructureGenerator>

Returns the structure generator used for placement and locate queries.

fn create_structures(&self, chunk: &Chunk)

Creates the structures in a chunk.

fn create_biomes(&self, chunk: &Chunk)

Creates the biomes in a chunk.

fn fill_from_noise( &self, chunk: GenerationChunk<'_, NoisePhase>, _beardifier: Option<&Beardifier>, )

Fills the chunk with noise.

fn build_surface( &self, _chunk: GenerationChunk<'_, SurfacePhase>, _neighbor_biomes: &dyn Fn(IVec3) -> u16, )

Builds the surface of the chunk.

fn apply_carvers(&self, _chunk: GenerationChunk<'_, CarversPhase>)

Applies carvers to the chunk.

fn create_worldgen_region_random( &self, world_seed: i64, center: ChunkPos, ) -> RandomSource

Creates the per-region random source exposed by vanilla WorldGenRegion.getRandom().

fn apply_biome_decorations(&self, _region: &mut WorldGenRegion<'_>)

Applies structure piece placement and biome feature decorations.

fn initial_spawn_search_origin(&self) -> BlockPos

Returns the climate-selected origin used by vanilla before searching for a safe spawn chunk.

impl From<FlatChunkGenerator> for ChunkGeneratorType

fn from(v: FlatChunkGenerator) -> ChunkGeneratorType

Converts to this type from the input type.

impl TryInto<FlatChunkGenerator> for ChunkGeneratorType

type Error = &'static str

The type returned in the event of a conversion error.

fn try_into( self, ) -> Result<FlatChunkGenerator, <Self as TryInto<FlatChunkGenerator>>::Error>

Performs the conversion.