| 1 |
use std::{ops::Range, time::Duration}; |
| 2 |
|
| 3 |
use bevy::prelude::*; |
| 4 |
|
| 5 |
use crate::{ |
| 6 |
colonist::{Colonist, MoveSpeed, Path}, |
| 7 |
jobs::{CurrentJob, Task}, |
| 8 |
pathfinding::find_path, |
| 9 |
rng::SimRng, |
| 10 |
sim::{SimPos, SimSystems, SimTick, TICKS_PER_HOUR, sim_pos}, |
| 11 |
world::{TILE_SIZE, TilePos, WorldMap}, |
| 12 |
worldgen::{WorldGenerated, spawn_tiles}, |
| 13 |
zones::Zones, |
| 14 |
}; |
| 15 |
|
| 16 |
pub struct AnimalsPlugin; |
| 17 |
|
| 18 |
impl Plugin for AnimalsPlugin { |
| 19 |
fn build(&self, app: &mut App) { |
| 20 |
app.add_systems(Startup, create_animal_assets) |
| 21 |
.add_systems(Update, populate.run_if(on_message::<WorldGenerated>)) |
| 22 |
.add_systems( |
| 23 |
FixedUpdate, |
| 24 |
( |
| 25 |
wander.in_set(SimSystems::Decide), |
| 26 |
(migrate, breed).in_set(SimSystems::Act), |
| 27 |
), |
| 28 |
); |
| 29 |
} |
| 30 |
} |
| 31 |
|
| 32 |
const WANDER_RADIUS: i32 = 10; |
| 33 |
pub const MAX_TAME: usize = 6; |
| 34 |
pub const PEN_RADIUS: i32 = 8; |
| 35 |
const BREED_CHANCE: f32 = 0.5; |
| 36 |
const BREED_INTERVAL_TICKS: u64 = 24 * TICKS_PER_HOUR; |
| 37 |
pub const FLEE_RANGE: i32 = 4; |
| 38 |
const FLEE_DISTANCE: f32 = 7.0; |
| 39 |
const IDLE_SECS: Range<f32> = 2.0..8.0; |
| 40 |
const MIN_DISTANCE_FROM_COLONY: f32 = 25.0; |
| 41 |
const MIGRATION_INTERVAL_TICKS: u64 = 2 * TICKS_PER_HOUR; |
| 42 |
const PLACEMENT_ATTEMPTS: usize = 200; |
| 43 |
|
| 44 |
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] |
| 45 |
pub enum AnimalKind { |
| 46 |
Deer, |
| 47 |
Rabbit, |
| 48 |
} |
| 49 |
|
| 50 |
impl AnimalKind { |
| 51 |
pub const ALL: [AnimalKind; 2] = [AnimalKind::Deer, AnimalKind::Rabbit]; |
| 52 |
|
| 53 |
pub fn meat(self) -> u32 { |
| 54 |
match self { |
| 55 |
AnimalKind::Deer => 30, |
| 56 |
AnimalKind::Rabbit => 8, |
| 57 |
} |
| 58 |
} |
| 59 |
|
| 60 |
pub fn population(self) -> usize { |
| 61 |
match self { |
| 62 |
AnimalKind::Deer => 10, |
| 63 |
AnimalKind::Rabbit => 16, |
| 64 |
} |
| 65 |
} |
| 66 |
|
| 67 |
pub fn tame_work(self) -> u32 { |
| 68 |
match self { |
| 69 |
AnimalKind::Deer => 600, |
| 70 |
AnimalKind::Rabbit => 300, |
| 71 |
} |
| 72 |
} |
| 73 |
|
| 74 |
pub fn hunt_work(self) -> u32 { |
| 75 |
match self { |
| 76 |
AnimalKind::Deer => 360, |
| 77 |
AnimalKind::Rabbit => 160, |
| 78 |
} |
| 79 |
} |
| 80 |
|
| 81 |
fn speed(self) -> f32 { |
| 82 |
match self { |
| 83 |
AnimalKind::Deer => 3.0, |
| 84 |
AnimalKind::Rabbit => 2.5, |
| 85 |
} |
| 86 |
} |
| 87 |
|
| 88 |
pub fn name(self) -> &'static str { |
| 89 |
match self { |
| 90 |
AnimalKind::Deer => "deer", |
| 91 |
AnimalKind::Rabbit => "rabbit", |
| 92 |
} |
| 93 |
} |
| 94 |
} |
| 95 |
|
| 96 |
#[derive(Component, Debug, Clone, Copy, PartialEq)] |
| 97 |
#[require(Transform, Visibility, TilePos, Path, SimPos, AnimalIdle)] |
| 98 |
pub struct Animal { |
| 99 |
pub kind: AnimalKind, |
| 100 |
} |
| 101 |
|
| 102 |
#[derive(Component, Debug, Clone, Copy, PartialEq, Eq)] |
| 103 |
pub struct Tame; |
| 104 |
|
| 105 |
#[derive(Component, Debug)] |
| 106 |
pub struct AnimalIdle(Timer); |
| 107 |
|
| 108 |
impl Default for AnimalIdle { |
| 109 |
fn default() -> Self { |
| 110 |
Self(Timer::from_seconds(IDLE_SECS.start, TimerMode::Once)) |
| 111 |
} |
| 112 |
} |
| 113 |
|
| 114 |
type Part = (Handle<Mesh>, Handle<ColorMaterial>); |
| 115 |
|
| 116 |
#[derive(Resource, Default)] |
| 117 |
pub struct AnimalAssets { |
| 118 |
deer_body: Part, |
| 119 |
deer_head: Part, |
| 120 |
rabbit_body: Part, |
| 121 |
rabbit_ear: Part, |
| 122 |
} |
| 123 |
|
| 124 |
fn create_animal_assets( |
| 125 |
mut commands: Commands, |
| 126 |
mut meshes: ResMut<Assets<Mesh>>, |
| 127 |
mut materials: ResMut<Assets<ColorMaterial>>, |
| 128 |
) { |
| 129 |
let mut part = |mesh: Mesh, color: Color| (meshes.add(mesh), materials.add(color)); |
| 130 |
let deer = Color::srgb_u8(150, 100, 60); |
| 131 |
let rabbit = Color::srgb_u8(185, 175, 160); |
| 132 |
commands.insert_resource(AnimalAssets { |
| 133 |
deer_body: part( |
| 134 |
Ellipse::new(TILE_SIZE * 0.42, TILE_SIZE * 0.22).into(), |
| 135 |
deer, |
| 136 |
), |
| 137 |
deer_head: part( |
| 138 |
Rectangle::new(TILE_SIZE * 0.2, TILE_SIZE * 0.3).into(), |
| 139 |
Color::srgb_u8(120, 80, 48), |
| 140 |
), |
| 141 |
rabbit_body: part( |
| 142 |
Ellipse::new(TILE_SIZE * 0.22, TILE_SIZE * 0.15).into(), |
| 143 |
rabbit, |
| 144 |
), |
| 145 |
rabbit_ear: part( |
| 146 |
Rectangle::new(TILE_SIZE * 0.06, TILE_SIZE * 0.2).into(), |
| 147 |
rabbit, |
| 148 |
), |
| 149 |
}); |
| 150 |
} |
| 151 |
|
| 152 |
fn part_bundle((mesh, material): &Part, transform: Transform) -> impl Bundle { |
| 153 |
( |
| 154 |
Mesh2d(mesh.clone()), |
| 155 |
MeshMaterial2d(material.clone()), |
| 156 |
transform, |
| 157 |
) |
| 158 |
} |
| 159 |
|
| 160 |
pub fn spawn_animal( |
| 161 |
commands: &mut Commands, |
| 162 |
assets: &AnimalAssets, |
| 163 |
kind: AnimalKind, |
| 164 |
tile: UVec2, |
| 165 |
) -> Entity { |
| 166 |
let at = |x: f32, y: f32| Transform::from_xyz(x * TILE_SIZE, y * TILE_SIZE, 0.01); |
| 167 |
let mut entity = commands.spawn(( |
| 168 |
Name::new(kind.name()), |
| 169 |
Animal { kind }, |
| 170 |
MoveSpeed(kind.speed()), |
| 171 |
TilePos(tile), |
| 172 |
sim_pos(WorldMap::tile_center(tile)), |
| 173 |
Transform::from_translation(WorldMap::tile_center(tile).extend(0.9)), |
| 174 |
)); |
| 175 |
entity.with_children(|c| match kind { |
| 176 |
AnimalKind::Deer => { |
| 177 |
c.spawn(part_bundle(&assets.deer_body, at(0.0, 0.0))); |
| 178 |
c.spawn(part_bundle(&assets.deer_head, at(0.38, 0.15))); |
| 179 |
} |
| 180 |
AnimalKind::Rabbit => { |
| 181 |
c.spawn(part_bundle(&assets.rabbit_body, at(0.0, 0.0))); |
| 182 |
c.spawn(part_bundle(&assets.rabbit_ear, at(0.1, 0.2))); |
| 183 |
c.spawn(part_bundle(&assets.rabbit_ear, at(0.18, 0.2))); |
| 184 |
} |
| 185 |
}); |
| 186 |
entity.id() |
| 187 |
} |
| 188 |
|
| 189 |
pub fn wild_tile(map: &WorldMap, rng: &mut SimRng, away_from: UVec2) -> Option<UVec2> { |
| 190 |
(0..PLACEMENT_ATTEMPTS).find_map(|_| { |
| 191 |
let tile = IVec2::new( |
| 192 |
rng.range_i32(0..map.size.x as i32), |
| 193 |
rng.range_i32(0..map.size.y as i32), |
| 194 |
); |
| 195 |
let far = tile.as_vec2().distance(away_from.as_vec2()) >= MIN_DISTANCE_FROM_COLONY; |
| 196 |
let open = map.move_cost(tile).is_some() && map.plant(tile).is_none(); |
| 197 |
(far && open && !map.get(tile).is_some_and(|t| t.is_water())).then(|| tile.as_uvec2()) |
| 198 |
}) |
| 199 |
} |
| 200 |
|
| 201 |
fn populate( |
| 202 |
mut commands: Commands, |
| 203 |
map: Res<WorldMap>, |
| 204 |
assets: Res<AnimalAssets>, |
| 205 |
mut rng: ResMut<SimRng>, |
| 206 |
existing: Query<Entity, With<Animal>>, |
| 207 |
) { |
| 208 |
for entity in &existing { |
| 209 |
commands.entity(entity).despawn(); |
| 210 |
} |
| 211 |
let colony = spawn_tiles(&map, 1) |
| 212 |
.first() |
| 213 |
.copied() |
| 214 |
.unwrap_or(map.size / 2); |
| 215 |
for kind in AnimalKind::ALL { |
| 216 |
for _ in 0..kind.population() { |
| 217 |
if let Some(tile) = wild_tile(&map, &mut rng, colony) { |
| 218 |
spawn_animal(&mut commands, &assets, kind, tile); |
| 219 |
} |
| 220 |
} |
| 221 |
} |
| 222 |
} |
| 223 |
|
| 224 |
pub fn missing_animals(kind: AnimalKind, alive: usize) -> bool { |
| 225 |
alive < kind.population() |
| 226 |
} |
| 227 |
|
| 228 |
fn breed( |
| 229 |
mut commands: Commands, |
| 230 |
tick: Res<SimTick>, |
| 231 |
assets: Res<AnimalAssets>, |
| 232 |
mut rng: ResMut<SimRng>, |
| 233 |
tame: Query<(&Animal, &TilePos), With<Tame>>, |
| 234 |
) { |
| 235 |
if !tick.0.is_multiple_of(BREED_INTERVAL_TICKS) || tick.0 == 0 { |
| 236 |
return; |
| 237 |
} |
| 238 |
let mut total = tame.iter().count(); |
| 239 |
for kind in AnimalKind::ALL { |
| 240 |
let herd: Vec<UVec2> = tame |
| 241 |
.iter() |
| 242 |
.filter(|(a, _)| a.kind == kind) |
| 243 |
.map(|(_, pos)| pos.0) |
| 244 |
.collect(); |
| 245 |
if herd.len() >= 2 && total < MAX_TAME && rng.range_f32(0.0..1.0) < BREED_CHANCE { |
| 246 |
let young = spawn_animal(&mut commands, &assets, kind, herd[0]); |
| 247 |
commands.entity(young).insert(Tame); |
| 248 |
total += 1; |
| 249 |
} |
| 250 |
} |
| 251 |
} |
| 252 |
|
| 253 |
fn migrate( |
| 254 |
mut commands: Commands, |
| 255 |
tick: Res<SimTick>, |
| 256 |
map: Res<WorldMap>, |
| 257 |
assets: Res<AnimalAssets>, |
| 258 |
mut rng: ResMut<SimRng>, |
| 259 |
animals: Query<&Animal, Without<Tame>>, |
| 260 |
) { |
| 261 |
if !tick.0.is_multiple_of(MIGRATION_INTERVAL_TICKS) || tick.0 == 0 { |
| 262 |
return; |
| 263 |
} |
| 264 |
let colony = spawn_tiles(&map, 1) |
| 265 |
.first() |
| 266 |
.copied() |
| 267 |
.unwrap_or(map.size / 2); |
| 268 |
for kind in AnimalKind::ALL { |
| 269 |
let alive = animals.iter().filter(|a| a.kind == kind).count(); |
| 270 |
if missing_animals(kind, alive) |
| 271 |
&& let Some(tile) = wild_tile(&map, &mut rng, colony) |
| 272 |
{ |
| 273 |
spawn_animal(&mut commands, &assets, kind, tile); |
| 274 |
} |
| 275 |
} |
| 276 |
} |
| 277 |
|
| 278 |
pub fn flee_goal(tile: UVec2, threats: &[UVec2]) -> Option<IVec2> { |
| 279 |
let near: Vec<IVec2> = threats |
| 280 |
.iter() |
| 281 |
.map(|t| t.as_ivec2()) |
| 282 |
.filter(|t| (*t - tile.as_ivec2()).abs().max_element() <= FLEE_RANGE) |
| 283 |
.collect(); |
| 284 |
if near.is_empty() { |
| 285 |
return None; |
| 286 |
} |
| 287 |
let away: Vec2 = near |
| 288 |
.iter() |
| 289 |
.map(|t| (tile.as_ivec2() - *t).as_vec2()) |
| 290 |
.sum::<Vec2>() |
| 291 |
.normalize_or(Vec2::X); |
| 292 |
Some(tile.as_ivec2() + (away * FLEE_DISTANCE).round().as_ivec2()) |
| 293 |
} |
| 294 |
|
| 295 |
#[allow(clippy::type_complexity)] |
| 296 |
pub fn wander( |
| 297 |
time: Res<Time>, |
| 298 |
map: Res<WorldMap>, |
| 299 |
zones: Res<Zones>, |
| 300 |
mut rng: ResMut<SimRng>, |
| 301 |
colonists: Query<(&TilePos, &CurrentJob), (With<Colonist>, Without<Animal>)>, |
| 302 |
mut animals: Query<(Entity, &TilePos, &mut Path, &mut AnimalIdle, Has<Tame>), With<Animal>>, |
| 303 |
) { |
| 304 |
let threats: Vec<UVec2> = colonists.iter().map(|(t, _)| t.0).collect(); |
| 305 |
let being_tamed: Vec<Entity> = colonists |
| 306 |
.iter() |
| 307 |
.filter_map(|(_, job)| match job.0?.task { |
| 308 |
Task::Tame { animal, .. } => Some(animal), |
| 309 |
_ => None, |
| 310 |
}) |
| 311 |
.collect(); |
| 312 |
let home = zones.home(map.size / 2).as_ivec2(); |
| 313 |
for (entity, tile, mut path, mut idle, tame) in &mut animals { |
| 314 |
if being_tamed.contains(&entity) { |
| 315 |
path.0.truncate(1); |
| 316 |
continue; |
| 317 |
} |
| 318 |
if tame { |
| 319 |
if !path.0.is_empty() || !idle.0.tick(time.delta()).is_finished() { |
| 320 |
continue; |
| 321 |
} |
| 322 |
let goal = home |
| 323 |
+ IVec2::new( |
| 324 |
rng.range_i32(-PEN_RADIUS..PEN_RADIUS + 1), |
| 325 |
rng.range_i32(-PEN_RADIUS..PEN_RADIUS + 1), |
| 326 |
); |
| 327 |
if map.in_bounds(goal) |
| 328 |
&& let Some(route) = find_path(&map, tile.0, goal.as_uvec2()) |
| 329 |
{ |
| 330 |
path.0 = route.into(); |
| 331 |
idle.0 |
| 332 |
.set_duration(Duration::from_secs_f32(rng.range_f32(IDLE_SECS))); |
| 333 |
idle.0.reset(); |
| 334 |
} |
| 335 |
continue; |
| 336 |
} |
| 337 |
let heading_into_danger = path |
| 338 |
.0 |
| 339 |
.back() |
| 340 |
.is_none_or(|end| flee_goal(*end, &threats).is_some()); |
| 341 |
if heading_into_danger && let Some(goal) = flee_goal(tile.0, &threats) { |
| 342 |
let goal = goal.clamp(IVec2::ZERO, map.size.as_ivec2() - 1).as_uvec2(); |
| 343 |
if let Some(route) = find_path(&map, tile.0, goal) { |
| 344 |
path.0 = route.into(); |
| 345 |
continue; |
| 346 |
} |
| 347 |
} |
| 348 |
if !path.0.is_empty() || !idle.0.tick(time.delta()).is_finished() { |
| 349 |
continue; |
| 350 |
} |
| 351 |
let goal = tile.0.as_ivec2() |
| 352 |
+ IVec2::new( |
| 353 |
rng.range_i32(-WANDER_RADIUS..WANDER_RADIUS + 1), |
| 354 |
rng.range_i32(-WANDER_RADIUS..WANDER_RADIUS + 1), |
| 355 |
); |
| 356 |
if map.in_bounds(goal) |
| 357 |
&& let Some(route) = find_path(&map, tile.0, goal.as_uvec2()) |
| 358 |
{ |
| 359 |
path.0 = route.into(); |
| 360 |
let secs = rng.range_f32(IDLE_SECS); |
| 361 |
idle.0.set_duration(Duration::from_secs_f32(secs)); |
| 362 |
idle.0.reset(); |
| 363 |
} |
| 364 |
} |
| 365 |
} |
| 366 |
|
| 367 |
#[cfg(test)] |
| 368 |
mod tests { |
| 369 |
use super::*; |
| 370 |
use crate::world::Terrain; |
| 371 |
|
| 372 |
#[test] |
| 373 |
fn animals_run_away_from_nearby_colonists() { |
| 374 |
let tile = UVec2::new(10, 10); |
| 375 |
let goal = flee_goal(tile, &[UVec2::new(8, 10), UVec2::new(30, 30)]).unwrap(); |
| 376 |
assert!(goal.x > 10 + FLEE_RANGE); |
| 377 |
assert_eq!( |
| 378 |
flee_goal(tile, &[UVec2::new(10, 10 + FLEE_RANGE as u32 + 1)]), |
| 379 |
None |
| 380 |
); |
| 381 |
} |
| 382 |
|
| 383 |
#[test] |
| 384 |
fn wild_animals_appear_away_from_the_colony_on_open_ground() { |
| 385 |
let mut map = WorldMap::filled(UVec2::splat(80), Terrain::Grass); |
| 386 |
map.set_plant(UVec2::new(70, 70), Some(crate::world::Plant::Tree)); |
| 387 |
let mut rng = SimRng::new(3); |
| 388 |
for _ in 0..50 { |
| 389 |
let tile = wild_tile(&map, &mut rng, UVec2::new(40, 40)).unwrap(); |
| 390 |
assert!(tile.as_vec2().distance(Vec2::splat(40.0)) >= MIN_DISTANCE_FROM_COLONY); |
| 391 |
assert!(map.plant(tile.as_ivec2()).is_none()); |
| 392 |
} |
| 393 |
} |
| 394 |
|
| 395 |
#[test] |
| 396 |
fn herds_regrow_up_to_their_population() { |
| 397 |
assert!(missing_animals(AnimalKind::Deer, 3)); |
| 398 |
assert!(!missing_animals( |
| 399 |
AnimalKind::Deer, |
| 400 |
AnimalKind::Deer.population() |
| 401 |
)); |
| 402 |
} |
| 403 |
|
| 404 |
|
| 405 |
|
| 406 |
#[test] |
| 407 |
fn idle_animals_wander_and_startled_ones_bolt() { |
| 408 |
let mut app = App::new(); |
| 409 |
app.insert_resource(WorldMap::filled(UVec2::splat(30), Terrain::Grass)) |
| 410 |
.insert_resource(SimRng::new(1)) |
| 411 |
.init_resource::<Time>() |
| 412 |
.init_resource::<Zones>() |
| 413 |
.add_systems(Update, wander); |
| 414 |
let spawn = |app: &mut App, tile: UVec2| { |
| 415 |
app.world_mut() |
| 416 |
.spawn(( |
| 417 |
Animal { |
| 418 |
kind: AnimalKind::Deer, |
| 419 |
}, |
| 420 |
TilePos(tile), |
| 421 |
)) |
| 422 |
.id() |
| 423 |
}; |
| 424 |
let idle = spawn(&mut app, UVec2::splat(25)); |
| 425 |
let startled = spawn(&mut app, UVec2::splat(10)); |
| 426 |
app.world_mut() |
| 427 |
.spawn((Colonist { name: "Ada".into() }, TilePos(UVec2::new(9, 10)))); |
| 428 |
app.update(); |
| 429 |
let route = &app.world().get::<Path>(startled).unwrap().0; |
| 430 |
assert!( |
| 431 |
route |
| 432 |
.back() |
| 433 |
.is_some_and(|end| end.x > 10 + FLEE_RANGE as u32) |
| 434 |
); |
| 435 |
for _ in 0..10 { |
| 436 |
app.world_mut() |
| 437 |
.resource_mut::<Time>() |
| 438 |
.advance_by(Duration::from_secs(1)); |
| 439 |
app.update(); |
| 440 |
} |
| 441 |
assert!(!app.world().get::<Path>(idle).unwrap().0.is_empty()); |
| 442 |
} |
| 443 |
} |