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//! Simulate the Minecraft world, currently only used for tests.
use std::sync::Arc;
use azalea_client::{
PhysicsState, interact::BlockStatePredictionHandler, local_player::LocalGameMode,
mining::MineBundle,
};
use azalea_core::{
entity_id::MinecraftEntityId, game_type::GameMode, position::Vec3, tick::GameTick,
};
use azalea_entity::{
Attributes, LookDirection, Physics, Position, dimensions::EntityDimensions,
inventory::Inventory,
};
use azalea_registry::builtin::EntityKind;
use azalea_world::{ChunkStorage, PartialWorld, World, WorldName, Worlds};
use bevy_app::App;
use bevy_ecs::prelude::*;
use parking_lot::RwLock;
use uuid::Uuid;
#[derive(Bundle, Clone)]
pub struct SimulatedPlayerBundle {
pub position: Position,
pub physics: Physics,
pub physics_state: PhysicsState,
pub look_direction: LookDirection,
pub attributes: Attributes,
pub inventory: Inventory,
}
impl SimulatedPlayerBundle {
pub fn new(position: Vec3) -> Self {
let dimensions = EntityDimensions::from(EntityKind::Player);
SimulatedPlayerBundle {
position: Position::new(position),
physics: Physics::new(&dimensions, position),
physics_state: PhysicsState::default(),
look_direction: LookDirection::default(),
attributes: Attributes::new(EntityKind::Player),
inventory: Inventory::default(),
}
}
}
fn simulation_world_name() -> WorldName {
WorldName::new("azalea:simulation")
}
fn create_simulation_world(chunks: ChunkStorage) -> (App, Arc<RwLock<World>>) {
let world_name = simulation_world_name();
let world = Arc::new(RwLock::new(World {
chunks,
..Default::default()
}));
let mut app = App::new();
// we don't use all the default azalea plugins because we don't need all of them
app.add_plugins((
azalea_physics::PhysicsPlugin,
azalea_entity::EntityPlugin,
azalea_client::movement::MovementPlugin,
super::PathfinderPlugin,
crate::bot::BotPlugin,
azalea_client::task_pool::TaskPoolPlugin::default(),
// for mining
azalea_client::inventory::InventoryPlugin,
azalea_client::mining::MiningPlugin,
azalea_client::interact::InteractPlugin,
azalea_client::loading::PlayerLoadedPlugin,
))
.insert_resource(Worlds {
map: [(world_name.clone(), Arc::downgrade(&world.clone()))]
.iter()
.cloned()
.collect(),
});
app.edit_schedule(bevy_app::Main, |schedule| {
schedule.set_executor_kind(bevy_ecs::schedule::ExecutorKind::SingleThreaded);
});
app.finish();
(app, world)
}
fn create_simulation_player_complete_bundle(
world: Arc<RwLock<World>>,
player: &SimulatedPlayerBundle,
) -> impl Bundle {
let world_name = simulation_world_name();
(
MinecraftEntityId(0),
azalea_entity::LocalEntity,
azalea_entity::metadata::PlayerMetadataBundle::default(),
azalea_entity::EntityBundle::new(
Uuid::nil(),
*player.position,
EntityKind::Player,
world_name,
),
azalea_client::local_player::WorldHolder {
// the partial world is never actually used by the pathfinder, so we can leave it empty
partial: Arc::new(RwLock::new(PartialWorld::default())),
shared: world.clone(),
},
Inventory::default(),
LocalGameMode::from(GameMode::Survival),
MineBundle::default(),
BlockStatePredictionHandler::default(),
azalea_client::local_player::PermissionLevel::default(),
azalea_entity::PlayerAbilities::default(),
)
}
pub fn create_simulation_player(
ecs: &mut bevy_ecs::world::World,
world: Arc<RwLock<World>>,
player: SimulatedPlayerBundle,
) -> Entity {
let mut entity = ecs.spawn(create_simulation_player_complete_bundle(world, &player));
entity.insert(player);
entity.id()
}
/// Simulate the Minecraft world to see if certain movements would be possible.
pub struct Simulation {
pub app: App,
pub entity: Entity,
pub world: Arc<RwLock<World>>,
}
impl Simulation {
pub fn new(chunks: ChunkStorage, player: SimulatedPlayerBundle) -> Self {
let (mut app, world) = create_simulation_world(chunks);
let entity = create_simulation_player(app.world_mut(), world.clone(), player);
Self { app, entity, world }
}
/// Despawn the old simulated player and create a new one.
///
/// This is cheaper than creating a new [`Simulation`] from scratch.
pub fn reset(&mut self, player: SimulatedPlayerBundle) {
self.app.world_mut().despawn(self.entity);
let entity = create_simulation_player(self.app.world_mut(), self.world.clone(), player);
self.entity = entity;
}
pub fn tick(&mut self) {
self.app.update();
self.app.world_mut().run_schedule(GameTick);
}
pub fn component<T: Component + Clone>(&self) -> T {
self.app.world().get::<T>(self.entity).unwrap().clone()
}
pub fn get_component<T: Component + Clone>(&self) -> Option<T> {
self.app.world().get::<T>(self.entity).cloned()
}
pub fn position(&self) -> Vec3 {
*self.component::<Position>()
}
pub fn physics(&self) -> Physics {
self.component::<Physics>().clone()
}
pub fn is_mining(&self) -> bool {
// return true if the component is present and Some
self.get_component::<azalea_client::mining::MineBlockPos>()
.and_then(|c| *c)
.is_some()
}
}
/// A set of simulations, useful for efficiently doing multiple simulations.
pub struct SimulationSet {
pub app: App,
world: Arc<RwLock<World>>,
}
impl SimulationSet {
pub fn new(chunks: ChunkStorage) -> Self {
let (app, world) = create_simulation_world(chunks);
Self { app, world }
}
pub fn tick(&mut self) {
self.app.update();
self.app.world_mut().run_schedule(GameTick);
}
pub fn spawn(&mut self, player: SimulatedPlayerBundle) -> Entity {
create_simulation_player(self.app.world_mut(), self.world.clone(), player)
}
pub fn despawn(&mut self, entity: Entity) {
self.app.world_mut().despawn(entity);
}
pub fn position(&self, entity: Entity) -> Vec3 {
**self.app.world().get::<Position>(entity).unwrap()
}
}
|
