Struct SpawnPlacementRule 

pub struct SpawnPlacementRule {
    pub placement: SpawnPlacementType,
    pub heightmap: Heightmap,
    pub spawnable_on: Option<String>,
    pub light: SpawnLight,
    pub biome_tag: Option<String>,
}

A mod entity type’s spawn rule, declared with Registrar::declare_spawn_placement: the arguments of NeoForge’s RegisterSpawnPlacementsEvent.register as data, so one rule serves native and wasm mods. Every field must hold for a spawn to pass; a trial spawner ignores light, as for vanilla types.

Fields

placement: SpawnPlacementType

Where the type stands (SpawnPlacementType).

heightmap: Heightmap

The heightmap natural spawning and chunk generation find the surface with.

spawnable_on: Option<String>

A block tag (minecraft:animals_spawnable_on, no #) the block below must be in.

light: SpawnLight

How bright the spot must be.

biome_tag: Option<String>

A biome tag (no #) the spot’s biome must be in.

Trait Implementations

impl Clone for SpawnPlacementRule

fn clone(&self) -> SpawnPlacementRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SpawnPlacementRule

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

Formats the value using the given formatter.

impl PartialEq for SpawnPlacementRule

fn eq(&self, other: &SpawnPlacementRule) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SpawnPlacementRule

impl Wire for SpawnPlacementRule

const MIN: usize

Minimum encoded size, used to reject impossible collection lengths.

fn put(&self, out: &mut Writer)

Encodes this value, recording failures on the writer.

fn put_owned(self, out: &mut Writer)

Consumes owned data when a resource’s ownership must cross the boundary.

fn take(input: &mut Reader<'_>) -> Result<SpawnPlacementRule, WireError>

Decodes one value, leaving any following bytes for the caller.