Struct EncounterEngine 

pub struct EncounterEngine;

Stateless driver for the wild-encounter control flow.

Implementations

impl EncounterEngine

pub fn on_step<E: EncounterProvider>( provider: &E, map_id: u32, x: i32, y: i32, mode: EncounterMode, rng: &mut dyn BattleRng, ) -> EncounterStep<E::Species>

Call once per completed player step.

The engine checks tile eligibility, then delegates the roll to the provider. Pure: state in, EncounterStep out, rng injected.

Draw order

1. If the tile is not encounter-eligible, returns EncounterStep::None without consuming any RNG.
2. Otherwise calls EncounterProvider::roll_encounter, which owns the entire RNG draw sequence (rate roll, slot roll, repel checks, …).