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clean up azalea-entity a little

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mat 2023-07-23 22:17:17 -05:00
parent 2ab16402de
commit d99ba0da55
12 changed files with 399 additions and 415 deletions
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13
azalea-client/src/packet_handling.rs
View file

@ -2,9 +2,10 @@ use std::{collections::HashSet, io::Cursor, sync::Arc};
use azalea_core::{ChunkPos, GameMode, ResourceLocation, Vec3};
use azalea_entity::{
indexing::EntityUuidIndex,
metadata::{apply_metadata, Health, PlayerMetadataBundle},
Dead, EntityBundle, EntityInfos, EntityKind, EntityUpdateSet, LastSentPosition, LoadedBy,
LookDirection, Physics, PlayerBundle, Position, RelativeEntityUpdate,
Dead, EntityBundle, EntityKind, EntityUpdateSet, LastSentPosition, LoadedBy, LookDirection,
Physics, PlayerBundle, Position, RelativeEntityUpdate,
};
use azalea_protocol::{
connect::{ReadConnection, WriteConnection},
@ -579,9 +580,9 @@ fn process_packet_events(ecs: &mut World) {
Commands,
Query<Option<&InstanceName>>,
Res<InstanceContainer>,
ResMut<EntityInfos>,
ResMut<EntityUuidIndex>,
)> = SystemState::new(ecs);
let (mut commands, mut query, instance_container, mut entity_infos) =
let (mut commands, mut query, instance_container, mut entity_uuid_index) =
system_state.get_mut(ecs);
let instance_name = query.get_mut(player_entity).unwrap();
@ -601,9 +602,7 @@ fn process_packet_events(ecs: &mut World) {
.write()
.entity_by_id
.insert(MinecraftEntityId(p.id), entity_commands.id());
entity_infos
.entity_by_uuid
.insert(p.uuid, entity_commands.id());
entity_uuid_index.insert(p.uuid, entity_commands.id());
}
// the bundle doesn't include the default entity metadata so we add that

6
azalea-client/src/player.rs
View file

@ -1,7 +1,7 @@
use azalea_auth::game_profile::GameProfile;
use azalea_chat::FormattedText;
use azalea_core::GameMode;
use azalea_entity::EntityInfos;
use azalea_entity::indexing::EntityUuidIndex;
use bevy_ecs::{
event::EventReader,
system::{Commands, Res},
@ -35,10 +35,10 @@ pub struct PlayerInfo {
pub fn retroactively_add_game_profile_component(
mut commands: Commands,
mut events: EventReader<AddPlayerEvent>,
entity_infos: Res<EntityInfos>,
entity_uuid_index: Res<EntityUuidIndex>,
) {
for event in events.iter() {
if let Some(entity) = entity_infos.get_entity_by_uuid(&event.info.uuid) {
if let Some(entity) = entity_uuid_index.get(&event.info.uuid) {
commands
.entity(entity)
.insert(GameProfileComponent(event.info.profile.clone()));

15
azalea-entity/src/dimensions.rs
View file

@ -1,7 +1,4 @@
use azalea_core::{Vec3, AABB};
use bevy_ecs::{query::Changed, system::Query};
use super::{Physics, Position};
#[derive(Debug, Default)]
pub struct EntityDimensions {
@ -24,15 +21,3 @@ impl EntityDimensions {
}
}
}
/// Sets the position of the entity. This doesn't update the cache in
/// azalea-world, and should only be used within azalea-world!
///
/// # Safety
/// Cached position in the world must be updated.
pub fn update_bounding_box(mut query: Query<(&Position, &mut Physics), Changed<Position>>) {
for (position, mut physics) in query.iter_mut() {
let bounding_box = physics.dimensions.make_bounding_box(position);
physics.bounding_box = bounding_box;
}
}

306
azalea-entity/src/info.rs
View file

@ -1,306 +0,0 @@
//! Implement things relating to entity datas, like an index of uuids to
//! entities.
use azalea_core::ChunkPos;
use azalea_world::{InstanceContainer, InstanceName, MinecraftEntityId, PartialInstance};
use bevy_app::{App, Plugin, PostUpdate, PreUpdate, Update};
use bevy_ecs::{
component::Component,
entity::Entity,
query::{Added, Changed, With, Without},
schedule::{IntoSystemConfigs, SystemSet},
system::{Commands, EntityCommand, Query, Res, ResMut, Resource},
world::{EntityMut, World},
};
use derive_more::{Deref, DerefMut};
use log::{debug, warn};
use parking_lot::RwLock;
use std::{
collections::{HashMap, HashSet},
fmt::Debug,
sync::Arc,
};
use uuid::Uuid;
use crate::{
add_dead,
systems::{
deduplicate_entities, deduplicate_local_entities, update_entity_by_id_index,
update_fluid_on_eyes, update_uuid_index,
},
update_bounding_box, EntityUuid, LastSentPosition, Position,
};
use super::{Local, LookDirection};
/// A Bevy [`SystemSet`] for various types of entity updates.
#[derive(SystemSet, Debug, Hash, Eq, PartialEq, Clone)]
pub enum EntityUpdateSet {
/// Remove ECS entities that refer to an entity that was already in the ECS
/// before.
Deduplicate,
/// Create search indexes for entities.
Index,
/// Remove despawned entities from search indexes.
Deindex,
}
/// Plugin handling some basic entity functionality.
pub struct EntityPlugin;
impl Plugin for EntityPlugin {
fn build(&self, app: &mut App) {
// entities get added pre-update
// added to indexes during update (done by this plugin)
// modified during update
// despawned post-update (done by this plugin)
app.add_systems(
PreUpdate,
remove_despawned_entities_from_indexes.in_set(EntityUpdateSet::Deindex),
)
.add_systems(
PostUpdate,
(deduplicate_entities, deduplicate_local_entities).in_set(EntityUpdateSet::Deduplicate),
)
.add_systems(
Update,
(
(
update_entity_chunk_positions,
update_uuid_index,
update_entity_by_id_index,
)
.in_set(EntityUpdateSet::Index),
(
add_updates_received,
debug_new_entity,
debug_detect_updates_received_on_local_entities,
add_dead,
update_bounding_box,
clamp_look_direction,
update_fluid_on_eyes,
),
),
)
.init_resource::<EntityInfos>();
}
}
fn debug_new_entity(query: Query<(Entity, Option<&Local>), Added<MinecraftEntityId>>) {
for (entity, local) in query.iter() {
if local.is_some() {
debug!("new local entity: {:?}", entity);
} else {
debug!("new entity: {:?}", entity);
}
}
}
// How entity updates are processed (to avoid issues with shared worlds)
// - each bot contains a map of { entity id: updates received }
// - the shared world also contains a canonical "true" updates received for each
// entity
// - when a client loads an entity, its "updates received" is set to the same as
// the global "updates received"
// - when the shared world sees an entity for the first time, the "updates
// received" is set to 1.
// - clients can force the shared "updates received" to 0 to make it so certain
// entities (i.e. other bots in our swarm) don't get confused and updated by
// other bots
// - when a client gets an update to an entity, we check if our "updates
// received" is the same as the shared world's "updates received": if it is,
// then process the update and increment the client's and shared world's
// "updates received" if not, then we simply increment our local "updates
// received" and do nothing else
/// An [`EntityCommand`] that applies a "relative update" to an entity, which
/// means this update won't be run multiple times by different clients in the
/// same world.
///
/// This is used to avoid a bug where when there's multiple clients in the same
/// world and an entity sends a relative move packet to all clients, its
/// position gets desynced since the relative move is applied multiple times.
///
/// Don't use this unless you actually got an entity update packet that all
/// other clients within render distance will get too. You usually don't need
/// this when the change isn't relative either.
pub struct RelativeEntityUpdate {
pub partial_world: Arc<RwLock<PartialInstance>>,
// a function that takes the entity and updates it
pub update: Box<dyn FnOnce(&mut EntityMut) + Send + Sync>,
}
impl EntityCommand for RelativeEntityUpdate {
fn apply(self, entity: Entity, world: &mut World) {
let partial_entity_infos = &mut self.partial_world.write().entity_infos;
let mut entity_mut = world.entity_mut(entity);
if Some(entity) == partial_entity_infos.owner_entity {
// if the entity owns this partial world, it's always allowed to update itself
(self.update)(&mut entity_mut);
return;
};
let entity_id = *entity_mut.get::<MinecraftEntityId>().unwrap();
let Some(updates_received) = entity_mut.get_mut::<UpdatesReceived>() else {
// a client tried to update another client, which isn't allowed
return;
};
let this_client_updates_received = partial_entity_infos
.updates_received
.get(&entity_id)
.copied();
let can_update = this_client_updates_received.unwrap_or(1) == **updates_received;
if can_update {
let new_updates_received = this_client_updates_received.unwrap_or(0) + 1;
partial_entity_infos
.updates_received
.insert(entity_id, new_updates_received);
**entity_mut.get_mut::<UpdatesReceived>().unwrap() = new_updates_received;
let mut entity = world.entity_mut(entity);
(self.update)(&mut entity);
}
}
}
/// Things that are shared between all the partial worlds.
#[derive(Resource, Default)]
pub struct EntityInfos {
/// An index of entities by their UUIDs
pub entity_by_uuid: HashMap<Uuid, Entity>,
}
impl EntityInfos {
pub fn new() -> Self {
Self {
entity_by_uuid: HashMap::default(),
}
}
pub fn get_entity_by_uuid(&self, uuid: &Uuid) -> Option<Entity> {
self.entity_by_uuid.get(uuid).copied()
}
}
/// Update the chunk position indexes in [`EntityInfos`].
fn update_entity_chunk_positions(
mut query: Query<(Entity, &Position, &mut LastSentPosition, &InstanceName), Changed<Position>>,
instance_container: Res<InstanceContainer>,
) {
for (entity, pos, last_pos, world_name) in query.iter_mut() {
let world_lock = instance_container.get(world_name).unwrap();
let mut world = world_lock.write();
let old_chunk = ChunkPos::from(*last_pos);
let new_chunk = ChunkPos::from(*pos);
if old_chunk != new_chunk {
// move the entity from the old chunk to the new one
if let Some(entities) = world.entities_by_chunk.get_mut(&old_chunk) {
entities.remove(&entity);
}
world
.entities_by_chunk
.entry(new_chunk)
.or_default()
.insert(entity);
}
}
}
/// A component that lists all the local player entities that have this entity
/// loaded. If this is empty, the entity will be removed from the ECS.
#[derive(Component, Clone, Deref, DerefMut)]
pub struct LoadedBy(pub HashSet<Entity>);
/// A component that counts the number of times this entity has been modified.
/// This is used for making sure two clients don't do the same relative update
/// on an entity.
///
/// If an entity is local (i.e. it's a client/localplayer), this component
/// should NOT be present in the entity.
#[derive(Component, Debug, Deref, DerefMut)]
pub struct UpdatesReceived(u32);
#[allow(clippy::type_complexity)]
pub fn add_updates_received(
mut commands: Commands,
query: Query<
Entity,
(
Changed<MinecraftEntityId>,
(Without<UpdatesReceived>, Without<Local>),
),
>,
) {
for entity in query.iter() {
// entities always start with 1 update received
commands.entity(entity).insert(UpdatesReceived(1));
}
}
/// The [`UpdatesReceived`] component should never be on [`Local`] entities.
/// This warns if an entity has both components.
fn debug_detect_updates_received_on_local_entities(
query: Query<Entity, (With<Local>, With<UpdatesReceived>)>,
) {
for entity in &query {
warn!("Entity {:?} has both Local and UpdatesReceived", entity);
}
}
/// Despawn entities that aren't being loaded by anything.
fn remove_despawned_entities_from_indexes(
mut commands: Commands,
mut entity_infos: ResMut<EntityInfos>,
instance_container: Res<InstanceContainer>,
query: Query<(Entity, &EntityUuid, &Position, &InstanceName, &LoadedBy), Changed<LoadedBy>>,
) {
for (entity, uuid, position, world_name, loaded_by) in &query {
let world_lock = instance_container.get(world_name).unwrap();
let mut world = world_lock.write();
// if the entity has no references left, despawn it
if !loaded_by.is_empty() {
continue;
}
// remove the entity from the chunk index
let chunk = ChunkPos::from(*position);
if let Some(entities_in_chunk) = world.entities_by_chunk.get_mut(&chunk) {
if entities_in_chunk.remove(&entity) {
// remove the chunk if there's no entities in it anymore
if entities_in_chunk.is_empty() {
world.entities_by_chunk.remove(&chunk);
}
} else {
warn!("Tried to remove entity from chunk {chunk:?} but the entity was not there.");
}
} else {
warn!("Tried to remove entity from chunk {chunk:?} but the chunk was not found.");
}
// remove it from the uuid index
if entity_infos.entity_by_uuid.remove(uuid).is_none() {
warn!("Tried to remove entity {entity:?} from the uuid index but it was not there.");
}
// and now remove the entity from the ecs
commands.entity(entity).despawn();
debug!("Despawned entity {entity:?} because it was not loaded by anything.");
return;
}
}
pub fn clamp_look_direction(mut query: Query<&mut LookDirection>) {
for mut look_direction in &mut query {
look_direction.y_rot %= 360.0;
look_direction.x_rot = look_direction.x_rot.clamp(-90.0, 90.0) % 360.0;
}
}
impl Debug for EntityInfos {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("EntityInfos").finish()
}
}

36
azalea-entity/src/lib.rs
View file

@ -5,33 +5,24 @@ mod data;
mod dimensions;
mod effects;
mod enchantments;
mod info;
pub mod metadata;
pub mod mining;
mod systems;
mod plugin;
use self::{attributes::AttributeInstance, metadata::Health};
use self::attributes::AttributeInstance;
pub use attributes::Attributes;
use azalea_block::BlockState;
use azalea_core::{BlockPos, ChunkPos, ResourceLocation, Vec3, AABB};
use azalea_world::{ChunkStorage, InstanceName};
use bevy_ecs::{
bundle::Bundle,
component::Component,
entity::Entity,
query::Changed,
system::{Commands, Query},
};
use bevy_ecs::{bundle::Bundle, component::Component};
pub use data::*;
use derive_more::{Deref, DerefMut};
pub use dimensions::{update_bounding_box, EntityDimensions};
pub use info::{
clamp_look_direction, EntityInfos, EntityPlugin, EntityUpdateSet, LoadedBy,
RelativeEntityUpdate,
};
pub use dimensions::EntityDimensions;
use std::fmt::Debug;
use uuid::Uuid;
pub use crate::plugin::*;
pub fn move_relative(
physics: &mut Physics,
direction: &LookDirection,
@ -234,21 +225,6 @@ pub struct Physics {
#[derive(Component, Copy, Clone, Default)]
pub struct Dead;
/// System that adds the [`Dead`] marker component if an entity's health is set
/// to 0 (or less than 0). This will be present if an entity is doing the death
/// animation.
///
/// Entities that are dead can not be revived.
/// TODO: fact check this in-game by setting an entity's health to 0 and then
/// not 0
pub fn add_dead(mut commands: Commands, query: Query<(Entity, &Health), Changed<Health>>) {
for (entity, health) in query.iter() {
if **health <= 0.0 {
commands.entity(entity).insert(Dead);
}
}
}
/// A component that contains the offset of the entity's eyes from the entity
/// coordinates.
///

154
azalea-entity/src/systems.rs → azalea-entity/src/plugin/indexing.rs
View file

@ -1,9 +1,51 @@
use azalea_core::{BlockPos, Vec3};
use azalea_world::{InstanceContainer, InstanceName, MinecraftEntityId};
use bevy_ecs::prelude::*;
use log::{debug, error, info};
//! Stuff related to entity indexes and keeping track of entities in the world.
use crate::{EntityInfos, EntityUuid, EyeHeight, FluidOnEyes, LoadedBy, Local, Position};
use azalea_core::ChunkPos;
use azalea_world::{InstanceContainer, InstanceName, MinecraftEntityId};
use bevy_ecs::{
entity::Entity,
query::{Changed, With, Without},
system::{Commands, Query, Res, ResMut, Resource},
};
use log::{debug, error, info, warn};
use std::{collections::HashMap, fmt::Debug};
use uuid::Uuid;
use crate::{EntityUuid, LastSentPosition, Local, Position};
use super::LoadedBy;
#[derive(Resource, Default)]
pub struct EntityUuidIndex {
/// An index of entities by their UUIDs
entity_by_uuid: HashMap<Uuid, Entity>,
}
impl EntityUuidIndex {
pub fn new() -> Self {
Self {
entity_by_uuid: HashMap::default(),
}
}
pub fn get(&self, uuid: &Uuid) -> Option<Entity> {
self.entity_by_uuid.get(uuid).copied()
}
pub fn contains_key(&self, uuid: &Uuid) -> bool {
self.entity_by_uuid.contains_key(uuid)
}
pub fn insert(&mut self, uuid: Uuid, entity: Entity) {
self.entity_by_uuid.insert(uuid, entity);
}
}
impl Debug for EntityUuidIndex {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("EntityUuidIndex").finish()
}
}
/// Remove new entities that have the same id as an existing entity, and
/// increase the reference counts.
@ -89,7 +131,7 @@ pub fn deduplicate_local_entities(
}
pub fn update_uuid_index(
mut entity_infos: ResMut<EntityInfos>,
mut entity_infos: ResMut<EntityUuidIndex>,
query: Query<(Entity, &EntityUuid, Option<&Local>), Changed<EntityUuid>>,
) {
for (entity, &uuid, local) in query.iter() {
@ -108,29 +150,6 @@ pub fn update_uuid_index(
}
}
// /// Clear all entities in a chunk. This will not clear them from the
// /// shared storage unless there are no other references to them.
// pub fn clear_entities_in_chunk(
// mut commands: Commands,
// partial_entity_infos: &mut PartialEntityInfos,
// chunk: &ChunkPos,
// instance_container: &WorldContainer,
// world_name: &InstanceName,
// mut query: Query<(&MinecraftEntityId, &mut ReferenceCount)>,
// ) { let world_lock = instance_container.get(world_name).unwrap(); let world =
// world_lock.read();
// if let Some(entities) = world.entities_by_chunk.get(chunk).cloned() {
// for &entity in &entities {
// let (id, mut reference_count) = query.get_mut(entity).unwrap();
// if partial_entity_infos.loaded_entity_ids.remove(id) {
// // decrease the reference count
// **reference_count -= 1;
// }
// }
// }
// }
/// System to keep the entity_by_id index up-to-date.
pub fn update_entity_by_id_index(
mut query: Query<
@ -156,26 +175,69 @@ pub fn update_entity_by_id_index(
}
}
pub fn update_fluid_on_eyes(
mut query: Query<(&mut FluidOnEyes, &Position, &EyeHeight, &InstanceName)>,
/// Update the chunk position indexes in [`EntityUuidIndex`].
pub fn update_entity_chunk_positions(
mut query: Query<(Entity, &Position, &mut LastSentPosition, &InstanceName), Changed<Position>>,
instance_container: Res<InstanceContainer>,
) {
for (mut fluid_on_eyes, position, eye_height, instance_name) in query.iter_mut() {
let Some(instance) = instance_container.get(instance_name) else {
continue;
};
for (entity, pos, last_pos, world_name) in query.iter_mut() {
let world_lock = instance_container.get(world_name).unwrap();
let mut world = world_lock.write();
let adjusted_eye_y = position.y + (**eye_height as f64) - 0.1111111119389534;
let eye_block_pos = BlockPos::from(Vec3::new(position.x, adjusted_eye_y, position.z));
let fluid_at_eye = instance
.read()
.get_fluid_state(&eye_block_pos)
.unwrap_or_default();
let fluid_cutoff_y = eye_block_pos.y as f64 + (fluid_at_eye.height as f64 / 16f64);
if fluid_cutoff_y > adjusted_eye_y {
**fluid_on_eyes = fluid_at_eye.fluid;
let old_chunk = ChunkPos::from(*last_pos);
let new_chunk = ChunkPos::from(*pos);
if old_chunk != new_chunk {
// move the entity from the old chunk to the new one
if let Some(entities) = world.entities_by_chunk.get_mut(&old_chunk) {
entities.remove(&entity);
}
world
.entities_by_chunk
.entry(new_chunk)
.or_default()
.insert(entity);
}
}
}
/// Despawn entities that aren't being loaded by anything.
pub fn remove_despawned_entities_from_indexes(
mut commands: Commands,
mut entity_infos: ResMut<EntityUuidIndex>,
instance_container: Res<InstanceContainer>,
query: Query<(Entity, &EntityUuid, &Position, &InstanceName, &LoadedBy), Changed<LoadedBy>>,
) {
for (entity, uuid, position, world_name, loaded_by) in &query {
let world_lock = instance_container.get(world_name).unwrap();
let mut world = world_lock.write();
// if the entity has no references left, despawn it
if !loaded_by.is_empty() {
continue;
}
// remove the entity from the chunk index
let chunk = ChunkPos::from(*position);
if let Some(entities_in_chunk) = world.entities_by_chunk.get_mut(&chunk) {
if entities_in_chunk.remove(&entity) {
// remove the chunk if there's no entities in it anymore
if entities_in_chunk.is_empty() {
world.entities_by_chunk.remove(&chunk);
}
} else {
**fluid_on_eyes = azalea_registry::Fluid::Empty;
}
warn!("Tried to remove entity from chunk {chunk:?} but the entity was not there.");
}
} else {
warn!("Tried to remove entity from chunk {chunk:?} but the chunk was not found.");
}
// remove it from the uuid index
if entity_infos.entity_by_uuid.remove(uuid).is_none() {
warn!("Tried to remove entity {entity:?} from the uuid index but it was not there.");
}
// and now remove the entity from the ecs
commands.entity(entity).despawn();
debug!("Despawned entity {entity:?} because it was not loaded by anything.");
return;
}
}

147
azalea-entity/src/plugin/mod.rs Normal file
View file

@ -0,0 +1,147 @@
pub mod indexing;
mod relative_updates;
use std::collections::HashSet;
use azalea_core::{BlockPos, Vec3};
use azalea_world::{InstanceContainer, InstanceName, MinecraftEntityId};
use bevy_app::{App, Plugin, PostUpdate, PreUpdate, Update};
use bevy_ecs::prelude::*;
use derive_more::{Deref, DerefMut};
use log::debug;
use crate::{
metadata::Health, Dead, EyeHeight, FluidOnEyes, Local, LookDirection, Physics, Position,
};
use indexing::EntityUuidIndex;
pub use relative_updates::RelativeEntityUpdate;
/// A Bevy [`SystemSet`] for various types of entity updates.
#[derive(SystemSet, Debug, Hash, Eq, PartialEq, Clone)]
pub enum EntityUpdateSet {
/// Remove ECS entities that refer to an entity that was already in the ECS
/// before.
Deduplicate,
/// Create search indexes for entities.
Index,
/// Remove despawned entities from search indexes.
Deindex,
}
/// Plugin handling some basic entity functionality.
pub struct EntityPlugin;
impl Plugin for EntityPlugin {
fn build(&self, app: &mut App) {
// entities get added pre-update
// added to indexes during update (done by this plugin)
// modified during update
// despawned post-update (done by this plugin)
app.add_systems(
PreUpdate,
indexing::remove_despawned_entities_from_indexes.in_set(EntityUpdateSet::Deindex),
)
.add_systems(
PostUpdate,
(
indexing::deduplicate_entities,
indexing::deduplicate_local_entities,
)
.in_set(EntityUpdateSet::Deduplicate),
)
.add_systems(
Update,
(
(
indexing::update_entity_chunk_positions,
indexing::update_uuid_index,
indexing::update_entity_by_id_index,
)
.in_set(EntityUpdateSet::Index),
(
relative_updates::add_updates_received,
relative_updates::debug_detect_updates_received_on_local_entities,
debug_new_entity,
add_dead,
update_bounding_box,
clamp_look_direction,
update_fluid_on_eyes,
),
),
)
.init_resource::<EntityUuidIndex>();
}
}
fn debug_new_entity(query: Query<(Entity, Option<&Local>), Added<MinecraftEntityId>>) {
for (entity, local) in query.iter() {
if local.is_some() {
debug!("new local entity: {:?}", entity);
} else {
debug!("new entity: {:?}", entity);
}
}
}
/// System that adds the [`Dead`] marker component if an entity's health is set
/// to 0 (or less than 0). This will be present if an entity is doing the death
/// animation.
///
/// Entities that are dead can not be revived.
/// TODO: fact check this in-game by setting an entity's health to 0 and then
/// not 0
pub fn add_dead(mut commands: Commands, query: Query<(Entity, &Health), Changed<Health>>) {
for (entity, health) in query.iter() {
if **health <= 0.0 {
commands.entity(entity).insert(Dead);
}
}
}
pub fn update_fluid_on_eyes(
mut query: Query<(&mut FluidOnEyes, &Position, &EyeHeight, &InstanceName)>,
instance_container: Res<InstanceContainer>,
) {
for (mut fluid_on_eyes, position, eye_height, instance_name) in query.iter_mut() {
let Some(instance) = instance_container.get(instance_name) else {
continue;
};
let adjusted_eye_y = position.y + (**eye_height as f64) - 0.1111111119389534;
let eye_block_pos = BlockPos::from(Vec3::new(position.x, adjusted_eye_y, position.z));
let fluid_at_eye = instance
.read()
.get_fluid_state(&eye_block_pos)
.unwrap_or_default();
let fluid_cutoff_y = eye_block_pos.y as f64 + (fluid_at_eye.height as f64 / 16f64);
if fluid_cutoff_y > adjusted_eye_y {
**fluid_on_eyes = fluid_at_eye.fluid;
} else {
**fluid_on_eyes = azalea_registry::Fluid::Empty;
}
}
}
/// A component that lists all the local player entities that have this entity
/// loaded. If this is empty, the entity will be removed from the ECS.
#[derive(Component, Clone, Deref, DerefMut)]
pub struct LoadedBy(pub HashSet<Entity>);
pub fn clamp_look_direction(mut query: Query<&mut LookDirection>) {
for mut look_direction in &mut query {
look_direction.y_rot %= 360.0;
look_direction.x_rot = look_direction.x_rot.clamp(-90.0, 90.0) % 360.0;
}
}
/// Sets the position of the entity. This doesn't update the cache in
/// azalea-world, and should only be used within azalea-world!
///
/// # Safety
/// Cached position in the world must be updated.
pub fn update_bounding_box(mut query: Query<(&Position, &mut Physics), Changed<Position>>) {
for (position, mut physics) in query.iter_mut() {
let bounding_box = physics.dimensions.make_bounding_box(position);
physics.bounding_box = bounding_box;
}
}

122
azalea-entity/src/plugin/relative_updates.rs Normal file
View file

@ -0,0 +1,122 @@
// How entity updates are processed (to avoid issues with shared worlds)
// - each bot contains a map of { entity id: updates received }
// - the shared world also contains a canonical "true" updates received for each
// entity
// - when a client loads an entity, its "updates received" is set to the same as
// the global "updates received"
// - when the shared world sees an entity for the first time, the "updates
// received" is set to 1.
// - clients can force the shared "updates received" to 0 to make it so certain
// entities (i.e. other bots in our swarm) don't get confused and updated by
// other bots
// - when a client gets an update to an entity, we check if our "updates
// received" is the same as the shared world's "updates received": if it is,
// then process the update and increment the client's and shared world's
// "updates received" if not, then we simply increment our local "updates
// received" and do nothing else
use std::sync::Arc;
use azalea_world::{MinecraftEntityId, PartialInstance};
use bevy_ecs::{
prelude::{Component, Entity},
query::{Changed, With, Without},
system::{Commands, EntityCommand, Query},
world::{EntityMut, World},
};
use derive_more::{Deref, DerefMut};
use log::warn;
use parking_lot::RwLock;
use crate::Local;
/// An [`EntityCommand`] that applies a "relative update" to an entity, which
/// means this update won't be run multiple times by different clients in the
/// same world.
///
/// This is used to avoid a bug where when there's multiple clients in the same
/// world and an entity sends a relative move packet to all clients, its
/// position gets desynced since the relative move is applied multiple times.
///
/// Don't use this unless you actually got an entity update packet that all
/// other clients within render distance will get too. You usually don't need
/// this when the change isn't relative either.
pub struct RelativeEntityUpdate {
pub partial_world: Arc<RwLock<PartialInstance>>,
// a function that takes the entity and updates it
pub update: Box<dyn FnOnce(&mut EntityMut) + Send + Sync>,
}
/// A component that counts the number of times this entity has been modified.
/// This is used for making sure two clients don't do the same relative update
/// on an entity.
///
/// If an entity is local (i.e. it's a client/localplayer), this component
/// should NOT be present in the entity.
#[derive(Component, Debug, Deref, DerefMut)]
pub struct UpdatesReceived(u32);
impl EntityCommand for RelativeEntityUpdate {
fn apply(self, entity: Entity, world: &mut World) {
let partial_entity_infos = &mut self.partial_world.write().entity_infos;
let mut entity_mut = world.entity_mut(entity);
if Some(entity) == partial_entity_infos.owner_entity {
// if the entity owns this partial world, it's always allowed to update itself
(self.update)(&mut entity_mut);
return;
};
let entity_id = *entity_mut.get::<MinecraftEntityId>().unwrap();
let Some(updates_received) = entity_mut.get_mut::<UpdatesReceived>() else {
// a client tried to update another client, which isn't allowed
return;
};
let this_client_updates_received = partial_entity_infos
.updates_received
.get(&entity_id)
.copied();
let can_update = this_client_updates_received.unwrap_or(1) == **updates_received;
if can_update {
let new_updates_received = this_client_updates_received.unwrap_or(0) + 1;
partial_entity_infos
.updates_received
.insert(entity_id, new_updates_received);
**entity_mut.get_mut::<UpdatesReceived>().unwrap() = new_updates_received;
let mut entity = world.entity_mut(entity);
(self.update)(&mut entity);
}
}
}
#[allow(clippy::type_complexity)]
pub fn add_updates_received(
mut commands: Commands,
query: Query<
Entity,
(
Changed<MinecraftEntityId>,
(Without<UpdatesReceived>, Without<Local>),
),
>,
) {
for entity in query.iter() {
// entities always start with 1 update received
commands.entity(entity).insert(UpdatesReceived(1));
}
}
/// The [`UpdatesReceived`] component should never be on [`Local`] entities.
/// This warns if an entity has both components.
pub fn debug_detect_updates_received_on_local_entities(
query: Query<Entity, (With<Local>, With<UpdatesReceived>)>,
) {
for entity in &query {
warn!("Entity {:?} has both Local and UpdatesReceived", entity);
}
}

9
azalea-physics/src/lib.rs
View file

@ -6,10 +6,9 @@ pub mod collision;
use azalea_block::{Block, BlockState};
use azalea_core::{BlockPos, Vec3};
use azalea_entity::update_bounding_box;
use azalea_entity::{
clamp_look_direction, metadata::Sprinting, move_relative, Attributes, Jumping, Local,
LookDirection, Physics, Position,
metadata::Sprinting, move_relative, Attributes, Jumping, Local, LookDirection, Physics,
Position,
};
use azalea_world::{Instance, InstanceContainer, InstanceName};
use bevy_app::{App, FixedUpdate, Plugin, Update};
@ -34,8 +33,8 @@ impl Plugin for PhysicsPlugin {
.add_systems(
Update,
force_jump_listener
.before(update_bounding_box)
.after(clamp_look_direction),
.before(azalea_entity::update_bounding_box)
.after(azalea_entity::clamp_look_direction),
)
.add_systems(FixedUpdate, (ai_step, travel).chain().in_set(PhysicsSet));
}

2
azalea-world/src/container.rs
View file

@ -19,7 +19,7 @@ pub struct InstanceContainer {
// cases where we'd want to get every entity in the world (just getting the entities in chunks
// should work fine).
// Entities are garbage collected (by manual reference counting in EntityInfos) so we don't
// Entities are garbage collected (by manual reference counting in EntityUuidIndex) so we don't
// need to worry about them here.
// If it looks like we're relying on the server giving us unique world names, that's because we

2
azalea-world/src/world.rs
View file

@ -53,7 +53,7 @@ pub struct PartialEntityInfos {
// note: using MinecraftEntityId for entity ids is acceptable here since
// there's no chance of collisions here
/// The entity id of the player that owns this partial world. This will
/// make `RelativeEntityUpdate` pretend the entity doesn't exist so
/// make `RelativeEntityUpdate` pretend this entity doesn't exist so
/// it doesn't get modified from outside sources.
pub owner_entity: Option<Entity>,
/// A counter for each entity that tracks how many updates we've observed

2
azalea/src/pathfinder/astar.rs
View file

@ -106,6 +106,6 @@ impl<W: PartialOrd + Debug> Ord for Weight<W> {
impl<W: PartialOrd + Debug> Eq for Weight<W> {}
impl<W: PartialOrd + Debug> PartialOrd for Weight<W> {
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
self.0.partial_cmp(&other.0)
Some(self.cmp(other))
}
}