feat(maze): add maze recreation ability

src/dev_tools.rs

@@ -7,23 +7,29 @@ use bevy::{
     },
     input::common_conditions::input_just_pressed,
     prelude::*,
+    window::PrimaryWindow,
 };
 
-use bevy_inspector_egui::quick::WorldInspectorPlugin;
+use bevy_inspector_egui::{bevy_egui::EguiContext, DefaultInspectorConfigPlugin};
 
-use crate::screens::Screen;
+use crate::{maze::events::RecreateMazeEvent, screens::Screen};
+use bevy_egui::{
+    egui::{self, Button, Color32, ScrollArea},
+    EguiPlugin,
+};
 
 pub(super) fn plugin(app: &mut App) {
     // Log `Screen` state transitions.
-    app.add_systems(Update, log_transitions::<Screen>);
-
-    // Toggle the debug overlay for UI.
-    app.add_plugins(DebugUiPlugin);
-    app.add_plugins(WorldInspectorPlugin::default());
-    app.add_systems(
-        Update,
-        toggle_debug_ui.run_if(input_just_pressed(TOGGLE_KEY)),
-    );
+    app.add_systems(Update, log_transitions::<Screen>)
+        .add_plugins(EguiPlugin)
+        .add_plugins(DebugUiPlugin)
+        .add_plugins(DefaultInspectorConfigPlugin)
+        .add_systems(Update, inspector_ui)
+        // Toggle the debug overlay for UI.
+        .add_systems(
+            Update,
+            toggle_debug_ui.run_if(input_just_pressed(TOGGLE_KEY)),
+        );
 }
 
 const TOGGLE_KEY: KeyCode = KeyCode::Backquote;
@@ -31,3 +37,30 @@ const TOGGLE_KEY: KeyCode = KeyCode::Backquote;
 fn toggle_debug_ui(mut options: ResMut<UiDebugOptions>) {
     options.toggle();
 }
+
+fn inspector_ui(world: &mut World) {
+    let Ok(egui_context) = world
+        .query_filtered::<&mut EguiContext, With<PrimaryWindow>>()
+        .get_single(world)
+    else {
+        return;
+    };
+
+    let mut egui_context = egui_context.clone();
+
+    egui::Window::new("UI").show(egui_context.get_mut(), |ui| {
+        ScrollArea::vertical().show(ui, |ui| {
+            bevy_inspector_egui::bevy_inspector::ui_for_world(world, ui);
+        });
+
+        ui.add_space(8.);
+
+        let button = Button::new("Recreate maze").fill(Color32::from_rgb(108, 108, 108));
+
+        if ui.add(button).clicked() {
+            if let Some(mut event_writer) = world.get_resource_mut::<Events<RecreateMazeEvent>>() {
+                event_writer.send(RecreateMazeEvent { floor: 1 });
+            }
+        }
+    });
+}

src/maze/assets.rs

@@ -17,7 +17,7 @@ pub(crate) struct MazeAssets {
 pub(crate) fn create_base_assets(
     meshes: &mut ResMut<Assets<Mesh>>,
     materials: &mut ResMut<Assets<StandardMaterial>>,
-    config: &Res<MazeConfig>,
+    config: &MazeConfig,
 ) -> MazeAssets {
     MazeAssets {
         hex_mesh: meshes.add(generate_hex_mesh(HEX_SIZE, config.height)),

src/maze/components.rs

@@ -2,8 +2,12 @@ use bevy::prelude::*;
 
 #[derive(Debug, Reflect, Component)]
 #[reflect(Component)]
-pub(crate) struct MazeWall;
+pub(crate) struct MazeFloor(pub(crate) u8);
 
 #[derive(Debug, Reflect, Component)]
 #[reflect(Component)]
 pub(crate) struct MazeTile;
+
+#[derive(Debug, Reflect, Component)]
+#[reflect(Component)]
+pub(crate) struct MazeWall;

src/maze/events.rs

@@ -0,0 +1,6 @@
+use bevy::prelude::*;
+
+#[derive(Debug, Event)]
+pub(crate) struct RecreateMazeEvent {
+    pub(crate) floor: u8,
+}

src/maze/mod.rs

@@ -2,6 +2,7 @@ use bevy::{ecs::world::Command, prelude::*};
 use plugin::MazePlugin;
 mod assets;
 mod components;
+pub mod events;
 pub mod plugin;
 mod resources;
 mod systems;

src/maze/plugin.rs

@@ -3,14 +3,22 @@ use bevy::{
     prelude::*,
 };
 
-use super::{resources::Layout, systems, MazeConfig};
+use super::{
+    events::RecreateMazeEvent,
+    resources::Layout,
+    systems::{self, recreation::handle_maze_recreation_event},
+    MazeConfig,
+};
 
 #[derive(Default)]
 pub(crate) struct MazePlugin;
 
 impl Plugin for MazePlugin {
     fn build(&self, app: &mut App) {
-        app.init_resource::<MazeConfig>().init_resource::<Layout>();
+        app.init_resource::<MazeConfig>()
+            .init_resource::<Layout>()
+            .add_event::<RecreateMazeEvent>()
+            .add_systems(Update, handle_maze_recreation_event);
     }
 }
 

src/maze/systems/mod.rs

@@ -1,2 +1,3 @@
+pub mod recreation;
 pub mod setup;
 mod spawn;

src/maze/systems/recreation.rs

@@ -0,0 +1,30 @@
+use bevy::prelude::*;
+
+use crate::maze::{
+    components::MazeFloor, events::RecreateMazeEvent, resources::Layout, MazeConfig,
+};
+
+use super::setup::setup_maze;
+
+pub(crate) fn handle_maze_recreation_event(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+    config: Res<MazeConfig>,
+    layout: Res<Layout>,
+    query: Query<(Entity, &MazeFloor)>,
+    mut event_reader: EventReader<RecreateMazeEvent>,
+) {
+    for event in event_reader.read() {
+        despawn_floor(&mut commands, &query, event.floor);
+        setup_maze(&mut commands, &mut meshes, &mut materials, &config, &layout);
+    }
+}
+
+fn despawn_floor(commands: &mut Commands, query: &Query<(Entity, &MazeFloor)>, floor_num: u8) {
+    for (entity, maze_floor) in query.iter() {
+        if maze_floor.0 == floor_num {
+            commands.entity(entity).despawn_recursive();
+        }
+    }
+}

src/maze/systems/setup.rs

@@ -1,7 +1,9 @@
 use bevy::prelude::*;
 use hexlab::{GeneratorType, MazeBuilder};
 
-use crate::maze::{assets::create_base_assets, resources::Layout, MazeConfig};
+use crate::maze::{
+    assets::create_base_assets, components::MazeFloor, resources::Layout, MazeConfig,
+};
 
 use super::spawn::spawn_single_hex_tile;
 
@@ -11,6 +13,16 @@ pub(crate) fn setup(
     mut materials: ResMut<Assets<StandardMaterial>>,
     config: Res<MazeConfig>,
     layout: Res<Layout>,
+) {
+    setup_maze(&mut commands, &mut meshes, &mut materials, &config, &layout);
+}
+
+pub(super) fn setup_maze(
+    commands: &mut Commands,
+    meshes: &mut ResMut<Assets<Mesh>>,
+    materials: &mut ResMut<Assets<StandardMaterial>>,
+    config: &MazeConfig,
+    layout: &Layout,
 ) {
     let maze = MazeBuilder::new()
         .with_radius(config.radius)
@@ -19,10 +31,11 @@ pub(crate) fn setup(
         .build()
         .expect("Something went wrong while creating maze");
 
-    let assets = create_base_assets(&mut meshes, &mut materials, &config);
+    let assets = create_base_assets(meshes, materials, config);
     commands
         .spawn((
             Name::new("Floor"),
+            MazeFloor(1),
             SpatialBundle {
                 transform: Transform::from_translation(Vec3::ZERO),
                 ..default()

src/maze/systems/spawn.rs

@@ -6,6 +6,7 @@ use hexx::HexOrientation;
 
 use crate::maze::{
     assets::MazeAssets,
+    components::{MazeTile, MazeWall},
     resources::{HEX_SIZE, WALL_SIZE},
 };
 
@@ -25,6 +26,7 @@ pub(super) fn spawn_single_hex_tile(
     parent
         .spawn((
             Name::new(format!("Hex {}", tile.to_string())),
+            MazeTile,
             PbrBundle {
                 mesh: assets.hex_mesh.clone(),
                 material: assets.hex_material.clone(),
@@ -64,6 +66,7 @@ fn spawn_single_wall(
 ) {
     parent.spawn((
         Name::new("Wall"),
+        MazeWall,
         PbrBundle {
             mesh: asstets.wall_mesh.clone(),
             material: asstets.wall_material.clone(),