| id |
title |
priority |
status |
scope |
owner |
updated_at |
evidence |
blocked_by |
| p3-13a |
Extend meteorological events — drought, flood, dust_storm |
p3 |
done |
game1 |
unassigned |
2026-05-04 |
| src/simulator/crates/mc-climate/src/weather.rs:225-303 — derive_events extended with drought/flood/dust_storm kinds |
| src/simulator/crates/mc-climate/src/weather.rs:60-117 — WeatherThresholds extended with new field set + JSON loader |
| src/simulator/crates/mc-climate/src/weather.rs:339-407 — three new tests (drought after N dry turns / flood on riparian saturation / dust_storm on arid high-wind), all passing under `cargo test -p mc-climate` |
|
|
Context
p0-36 shipped the baseline mc-climate::derive_weather_events returning rain/snow/wind events from the per-turn weather sample. The design in public/games/age-of-dwarves/docs/terrain/CLIMATE.md calls for a wider event vocabulary; this objective extends the meteorological set with drought (sustained low precipitation over N turns), flood (precipitation spike on saturated tile), and dust_storm (high wind on arid tile).
Acceptance
- ✓
mc-climate::derive_events extended to emit drought, flood, dust_storm WeatherEvent records keyed by tile + severity per the rules in CLIMATE.md. (src/simulator/crates/mc-climate/src/weather.rs:225-303)
- ✓ Each event type rides the existing typed
WeatherEvent struct (kind-tagged; matches the storm/heat_wave/blizzard pattern shipped by p0-36). (src/simulator/crates/mc-climate/src/weather.rs:18-32)
- ✓ Drought reads
TileState.drought_counter (per-tile rolling dry-turn counter maintained by mc-ecology) and gates on drought_min_dry_turns from thresholds JSON; flood gates on TileState.riparian_distance (the saturation/proximity-to-water signal from mc-hydrology). (src/simulator/crates/mc-climate/src/weather.rs:230-271)
- ✓ Events flow through the existing
derive_events -> turn-pipeline path that p0-36 routes to EventBus.weather_event; new kinds use the same WeatherEvent shape so no UI/observation plumbing change is needed.
- ✓
cargo test -p mc-climate — all 10 weather tests pass including test_drought_emits_after_n_dry_turns, test_flood_emits_on_saturation_spike, test_dust_storm_emits_on_arid_high_wind. (src/simulator/crates/mc-climate/src/weather.rs:339-407)
Source-of-truth rails
- Rust crate:
mc-climate::derive_weather_events (extension); mc-hydrology provides saturation query.
- JSON path:
public/resources/climate/_config.json (thresholds + window sizes).
- mc-core wrapper:
WeatherEvent enum + EventSeverity(u8) newtype.
Out of scope
- Geological / biological / anomalous events —
p3-13b/c/d.
- Player remediation actions — separate ticket.
References
public/games/age-of-dwarves/docs/terrain/CLIMATE.mdpublic/games/age-of-dwarves/docs/terrain/WEATHER_HISTORY.md- Parent:
p0-36
- Siblings:
p3-13b, p3-13c, p3-13d
