From 7e531d42a80133d6d5b5acfd45e251a13ef42664 Mon Sep 17 00:00:00 2001
From: Schrottkatze <git@schrottkatze.de>
Date: Thu, 26 Jun 2025 19:59:31 +0200
Subject: [PATCH] you can now despawn entities

---
 src/debug.rs             |  4 +--
 src/debug/debug_event.rs | 15 +++++++++--
 src/game/debug.rs        | 58 +++++++++++++++++++++++++++++++++++++---
 startup.tx               |  2 +-
 4 files changed, 70 insertions(+), 9 deletions(-)

diff --git a/src/debug.rs b/src/debug.rs
index 10d5330..74fde4e 100644
--- a/src/debug.rs
+++ b/src/debug.rs
@@ -2,7 +2,7 @@
 use std::{fs, path::PathBuf};
 
 use bevy::prelude::*;
-use bevy_inspector_egui::bevy_egui::EguiPlugin;
+use bevy_inspector_egui::{bevy_egui::EguiPlugin, quick::WorldInspectorPlugin};
 use clap::Subcommand;
 use console::exec_script;
 
@@ -36,7 +36,7 @@ pub fn plugin(app: &mut App) {
             .in_set(DebugSet),
     )
     .add_systems(Startup, startup_file.pipe(exec_script))
-    .add_plugins(console::plugin);
+    .add_plugins((console::plugin /* WorldInspectorPlugin::default() */,));
 }
 
 fn start_game(
diff --git a/src/debug/debug_event.rs b/src/debug/debug_event.rs
index 0c530cc..4f10cc4 100644
--- a/src/debug/debug_event.rs
+++ b/src/debug/debug_event.rs
@@ -50,11 +50,22 @@ pub enum DebugEvent {
     /// Debug mode cannot be disabled. Just restart the game lmao.
     ///
     /// Current debug mode behaviour:
-    /// - Nothing
+    /// - You can load gtlf scenes
     #[command(name = "enable-debug", aliases = ["debug-enable"])]
     EnableDebugMode,
 
     /// Load a gltf scene.
+    ///
+    /// Auto-reloading isn't possible due to engine reasons, see:
+    /// https://github.com/bevyengine/bevy/pull/18358
     #[command(name = "load-scene", aliases = ["load-file", "load"])]
-    LoadGltf { asset_path: String },
+    LoadGltf {
+        /// The asset path of the item.
+        asset_path: String,
+        /// Id for the item, so it can easily be selected using other debug tools.
+        id: Option<String>,
+    },
+
+    /// Despawn an entity by string id. Uniqueness of Ids isn't guaranteed.
+    Despawn { id: String },
 }
diff --git a/src/game/debug.rs b/src/game/debug.rs
index 20a7fce..9e2dcfe 100644
--- a/src/game/debug.rs
+++ b/src/game/debug.rs
@@ -1,14 +1,28 @@
-use bevy::{asset::AssetPath, prelude::*};
+use std::path::PathBuf;
+
+use bevy::{
+    asset::{AssetPath, io::AssetSourceEvent},
+    prelude::*,
+};
 
 use crate::debug::{ConsoleLog, DebugEvent, DebugMode};
 
 pub fn plugin(app: &mut App) {
     app.add_systems(
         Update,
-        handle_load_gltf.run_if(in_state(DebugMode::Enabled)),
+        (
+            handle_load_gltf.run_if(in_state(DebugMode::Enabled)),
+            handle_despawn,
+        ),
     );
 }
 
+#[derive(Component, Clone)]
+struct Id(String);
+
+#[derive(Component)]
+struct HasPath(String);
+
 fn handle_load_gltf(
     mut c: Commands,
     mut dbg_reader: EventReader<DebugEvent>,
@@ -16,11 +30,47 @@ fn handle_load_gltf(
     asset_server: Res<AssetServer>,
 ) {
     for ev in dbg_reader.read() {
-        if let DebugEvent::LoadGltf { asset_path } = ev {
+        if let DebugEvent::LoadGltf { asset_path, id } = ev {
+            logger.write(&format!("Loading {asset_path}..."));
             let scene_handle = asset_server
                 .load(GltfAssetLabel::Scene(0).from_asset(AssetPath::from(asset_path.clone())));
 
-            c.spawn(SceneRoot(scene_handle));
+            let mut scene = c.spawn((SceneRoot(scene_handle), HasPath(asset_path.clone())));
+
+            if let Some(id) = id {
+                scene.insert(Id(id.clone()));
+            }
+            logger.write(
+                "Should be loaded now. If nothing happened, check if you might've typoed the path.",
+            );
+        }
+    }
+}
+
+fn handle_despawn(
+    mut c: Commands,
+    mut dbg_reader: EventReader<DebugEvent>,
+    mut logger: ResMut<ConsoleLog>,
+    entities: Query<(Entity, &Id)>,
+) {
+    for ev in dbg_reader.read() {
+        if let DebugEvent::Despawn { id: target_id } = ev {
+            let mut count = 0;
+            entities
+                .iter()
+                .filter_map(|(entity, Id(id))| (id == target_id).then_some(entity))
+                .for_each(|entity| {
+                    count += 1;
+                    c.entity(entity).despawn()
+                });
+
+            if count > 0 {
+                logger.write(&format!("Despawned {count} entities."));
+            } else {
+                logger.err(&format!(
+                    "Couldn't find any entities to despawn with id {target_id:?}."
+                ))
+            }
         }
     }
 }
diff --git a/startup.tx b/startup.tx
index 2ce0900..57bfa59 100644
--- a/startup.tx
+++ b/startup.tx
@@ -2,4 +2,4 @@ log "hello from startup script!!"
 
 enable-debug
 start-game
-load-scene gltf/test.glb
+load-scene gltf/test.glb test