Created nearest_entity system param (#102)

* Created nearest_entity system param

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

* Added nearby item iterators.

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

* Export bot.rs (#101)

* Removed .vscode settings (#104)

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

* raycasting not raytracing

* don't panic if TranslatableComponent::to_string fails

* Food/saturation component support (#97)

* modified for food stuff

* moved food/saturation to a separate file

* hunger component

* simplify some logic

---------

Co-authored-by: mat <git@matdoes.dev>

* Created nearest_entity system param

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

* Added nearby item iterators.

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

* Applied tweaks from PR review

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

* Fixed doctests

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>

---------

Signed-off-by: TheDudeFromCI <thedudefromci@gmail.com>
Co-authored-by: mat <git@matdoes.dev>
Co-authored-by: Luuk van Oijen <lazyluuk.channel@gmail.com>

1 files changed, 73 insertions, 0 deletions

diff --git a/azalea/examples/nearest_entity.rs b/azalea/examples/nearest_entity.rs
new file mode 100644
index 00000000..9ac6331b
--- /dev/null
+++ b/azalea/examples/nearest_entity.rs
@@ -0,0 +1,73 @@
+use azalea::nearest_entity::EntityFinder;
+use azalea::ClientBuilder;
+use azalea::{Bot, LookAtEvent};
+use azalea_client::Account;
+use azalea_entity::metadata::{ItemItem, Player};
+use azalea_entity::{EyeHeight, Local, Position};
+use bevy_app::{FixedUpdate, Plugin};
+use bevy_ecs::{
+    prelude::{Entity, EventWriter},
+    query::With,
+    system::Query,
+};
+
+#[tokio::main]
+async fn main() {
+    let account = Account::offline("bot");
+
+    ClientBuilder::new()
+        .add_plugins(LookAtStuffPlugin)
+        .start(account, "localhost")
+        .await
+        .unwrap();
+}
+
+pub struct LookAtStuffPlugin;
+impl Plugin for LookAtStuffPlugin {
+    fn build(&self, app: &mut bevy_app::App) {
+        app.add_systems(FixedUpdate, (look_at_everything, log_nearby_item_drops));
+    }
+}
+
+fn look_at_everything(
+    bots: Query<Entity, (With<Local>, With<Player>)>,
+    entities: EntityFinder,
+    entity_positions: Query<(&Position, Option<&EyeHeight>)>,
+    mut look_at_event: EventWriter<LookAtEvent>,
+) {
+    for bot_id in bots.iter() {
+        let Some(entity) = entities.nearest_to_entity(bot_id, 16.0) else {
+            continue;
+        };
+
+        let (position, eye_height) = entity_positions.get(entity).unwrap();
+
+        let mut look_target = **position;
+        if let Some(eye_height) = eye_height {
+            look_target.y += **eye_height as f64;
+        }
+
+        look_at_event.send(LookAtEvent {
+            entity: bot_id,
+            position: look_target,
+        });
+    }
+}
+
+fn log_nearby_item_drops(
+    bots: Query<Entity, With<Bot>>,
+    entities: EntityFinder<With<ItemItem>>,
+    item_drops: Query<&ItemItem>,
+) {
+    for bot_id in bots.iter() {
+        for (entity, distance) in entities.nearby_entities_to_entity(bot_id, 8.0) {
+            let item_drop = item_drops.get(entity).unwrap();
+            let kind = item_drop.kind();
+
+            println!(
+                "Bot {:?} can see an {:?} {:.1} meters away.",
+                bot_id, kind, distance
+            );
+        }
+    }
+}