Drawing pieces on the board!

Also states: 2d state, skeleton 3d state, menu state, loading state.

Really leaning into the bevy system scheduling.

examples/sprites-2d.rs

@@ -96,13 +96,15 @@ fn initialize_board(sprite_sheet: Option<Res<SpriteSheet>>, mut commands: Comman
                     let index = BoardIndex { x, y };
 
                     // Rectangle
-                    parent.spawn(SpriteSheetBundle {
+                    parent.spawn((
+                        SpriteSheetBundle {
                             texture_atlas,
                             sprite,
                             transform,
-                        index,
                             ..default()
-                    });
+                        },
+                        index,
+                    ));
                 }
             });
     }

src/debug.rs

@@ -4,21 +4,17 @@ pub struct DebugPlugin;
 
 impl Plugin for DebugPlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(PostStartup, display_board);
+        app.add_systems(
+            Update,
+            display_board.run_if(resource_exists::<DebugEnabled>()),
+        );
     }
 }
 
-fn display_board(board: Res<crate::game::Board>, pieces: Query<&crate::game::Piece>) {
+/// Marker resource used to enable Debug mode when present
-    board.inner.iter().for_each(|row| {
+#[derive(Debug, Resource)]
-        print!("+--+--+--+--+--+--+--+--+\n");
+struct DebugEnabled;
-        print!("|");
+
-        row.iter()
+fn display_board(board: Res<crate::game::Board>) {
-            .map(|piece| piece.and_then(|p| pieces.get(p).ok()))
+    info!("{}", *board);
-            .for_each(|piece| match piece {
-                Some(p) => print!("{} |", p),
-                None => print!("  |"),
-            });
-        print!("\n");
-    });
-    print!("+--+--+--+--+--+--+--+--+\n");
 }

src/display2d.rs

@@ -1,9 +1,170 @@
-use crate::prelude::*;
+use crate::{
+    game::{Board, BoardIndex, Piece},
+    prelude::*,
+};
+
+const SCALE: f32 = 80.0;
 
 pub struct Display2dPlugin;
 
 impl Plugin for Display2dPlugin {
     fn build(&self, app: &mut App) {
-        todo!()
+        app.add_systems(
+            Startup,
+            (initialize_camera, load_spritesheet).run_if(in_state(GameState::Loading)),
+        )
+        .add_systems(
+            Update,
+            (
+                initialize_board.run_if(resource_added::<SpriteSheet>()),
+                draw_board
+                    .run_if(resource_exists::<SpriteSheet>())
+                    .run_if(resource_changed::<Board>()) // TODO: run_if(in_state(Display2d))
+                    .run_if(any_with_component::<BoardIndex>()),
+            ),
+        )
+        .add_systems(OnEnter(GameState::Display2d), (activate, draw_board));
+    }
+}
+
+/// Sprite sheet Resource for later reference
+#[derive(Debug, Resource)]
+struct SpriteSheet {
+    handle: Handle<TextureAtlas>,
+}
+
+/// Marker component for the 2d board entity
+#[derive(Debug, Component)]
+struct Board2d;
+
+/// Marker for 2d piece entities
+#[derive(Debug, Component)]
+struct Piece2d;
+
+/// STARTUP: Initialize 2d gameplay Camera
+fn initialize_camera(mut commands: Commands) {
+    commands.spawn(Camera2dBundle {
+        camera: Camera {
+            is_active: false,
+            ..default()
+        },
+        ..default()
+    });
+}
+
+/// STARTUP: Load sprite sheet and insert texture atlas
+fn load_spritesheet(
+    mut texture_atlases: ResMut<Assets<TextureAtlas>>,
+    server: Res<AssetServer>,
+    mut commands: Commands,
+) {
+    let atlas = TextureAtlas::from_grid(
+        server.load("sprites.png"),
+        Vec2::new(16.0, 16.0),
+        5,
+        1,
+        None,
+        None,
+    );
+    commands.insert_resource(SpriteSheet {
+        handle: texture_atlases.add(atlas),
+    });
 }
+
+/// STARTUP: Initialize the board for representation
+fn initialize_board(sprite_sheet: Option<Res<SpriteSheet>>, mut commands: Commands) {
+    if let Some(sprite_sheet) = sprite_sheet {
+        commands
+            .spawn((
+                SpatialBundle {
+                    transform: Transform::from_xyz(-SCALE * 3.5, -SCALE * 1.5, 0.0),
+                    ..default()
+                },
+                Board2d,
+            ))
+            .with_children(|parent| {
+                for i in 0..32 {
+                    let x = i % 8;
+                    let y = i / 8;
+                    let s = (x % 2) ^ (y % 2);
+
+                    let transform = Transform::from_scale(Vec3::splat(5.0))
+                        .with_translation(Vec3::new(SCALE * x as f32, SCALE * y as f32, 0.0));
+
+                    let sprite = TextureAtlasSprite::new(s);
+
+                    let texture_atlas = sprite_sheet.handle.clone();
+
+                    let index = BoardIndex { x, y };
+
+                    // Rectangle
+                    parent.spawn((
+                        SpriteSheetBundle {
+                            texture_atlas,
+                            sprite,
+                            transform,
+                            ..default()
+                        },
+                        index,
+                    ));
+                }
+            });
+    }
+}
+
+fn draw_board(
+    board: Option<Res<Board>>,
+    mut commands: Commands,
+    tiles: Query<(&Transform, &BoardIndex)>,
+    pieces: Query<Entity, With<Piece2d>>,
+    root: Query<Entity, With<Board2d>>,
+    sprite_sheet: Option<Res<SpriteSheet>>,
+) {
+    if let (Some(board), Some(sprite_sheet)) = (board, sprite_sheet) {
+        commands.entity(root.single()).with_children(|parent| {
+            info!("Board and sprite sheet ready, drawing board");
+            board
+                .pieces()
+                .iter()
+                .filter_map(|(board_index, piece)| {
+                    tiles.iter().find_map(|(transform, this_index)| {
+                        (*this_index == *board_index).then(|| (piece, transform))
+                    })
+                })
+                .for_each(|(piece, transform)| {
+                    let texture_atlas = sprite_sheet.handle.clone();
+                    let s = match piece {
+                        Piece::Queen => 2,
+                        Piece::Drone => 3,
+                        Piece::Pawn => 4,
+                    };
+                    let sprite = TextureAtlasSprite::new(s);
+                    // TODO: transform is slightly different, set sprite
+                    parent.spawn((
+                        piece.clone(),
+                        SpriteSheetBundle {
+                            texture_atlas,
+                            sprite,
+                            transform: Transform {
+                                ..transform.clone()
+                            },
+                            ..default()
+                        },
+                        Piece2d,
+                    ));
+                });
+        });
+    }
+}
+
+fn activate(
+    mut cameras: Query<&mut Camera, With<Camera2d>>,
+    mut boards: Query<&mut Visibility, With<Board2d>>,
+) {
+    cameras.iter_mut().for_each(|mut camera| {
+        camera.is_active = true;
+    });
+    boards.iter_mut().for_each(|mut visibility| {
+        *visibility = Visibility::Visible;
+    });
 }

src/display3d.rs

@@ -4,6 +4,62 @@ pub struct Display3dPlugin;
 
 impl Plugin for Display3dPlugin {
     fn build(&self, app: &mut App) {
-        todo!()
+        app.add_systems(
+            Startup,
+            (initialize_camera, load_models).run_if(in_state(GameState::Loading)),
+        )
+        .add_systems(
+            Update,
+            initialize_board.run_if(resource_added::<ModelMap>()),
+        )
+        .add_systems(OnEnter(GameState::Display3d), activate);
     }
 }
+
+#[derive(Debug, Component)]
+struct Board3d;
+
+#[derive(Debug, Resource)]
+struct ModelMap;
+
+fn initialize_camera(mut commands: Commands) {
+    commands.spawn(Camera3dBundle {
+        camera: Camera {
+            is_active: false,
+            ..default()
+        },
+        ..default()
+    });
+}
+
+fn load_models(server: Res<AssetServer>, mut commands: Commands) {
+    warn!("TODO: Load models");
+
+    commands.insert_resource(ModelMap);
+}
+
+fn initialize_board(mut commands: Commands, model_map: Option<Res<ModelMap>>) {
+    if let Some(models) = model_map {
+        warn!("TODO: Intialize 3D Board!");
+
+        commands.spawn((
+            SpatialBundle {
+                visibility: Visibility::Hidden,
+                ..default()
+            },
+            Board3d,
+        ));
+    }
+}
+
+fn activate(
+    mut cameras: Query<&mut Camera, With<Camera3d>>,
+    mut boards: Query<&mut Visibility, With<Board3d>>,
+) {
+    cameras.iter_mut().for_each(|mut camera| {
+        camera.is_active = true;
+    });
+    boards.iter_mut().for_each(|mut visibility| {
+        *visibility = Visibility::Visible;
+    });
+}

src/game.rs

@@ -8,7 +8,7 @@ impl Plugin for GamePlugin {
     }
 }
 
-#[derive(Debug, Component)]
+#[derive(Debug, Component, Clone)]
 pub(crate) enum Piece {
     Pawn,
     Drone,
@@ -41,65 +41,55 @@ impl std::fmt::Display for Piece {
 /// ````
 #[derive(Debug, Resource)]
 pub(crate) struct Board {
-    pub inner: Vec<Vec<Option<Entity>>>,
+    inner: Vec<Vec<Option<Piece>>>,
 }
 
-fn setup_board(mut commands: Commands) {
+#[derive(Debug, Component, PartialEq)]
-    let a5d = commands
+pub(crate) struct BoardIndex {
-        .spawn((SpatialBundle { ..default() }, Piece::Drone))
+    pub x: usize,
-        .id();
+    pub y: usize,
-    let a6q = commands
+}
-        .spawn((SpatialBundle { ..default() }, Piece::Queen))
+
-        .id();
+impl Board {
-    let a7q = commands
+    /// Returns the piece at the given location
-        .spawn((SpatialBundle { ..default() }, Piece::Queen))
+    pub(crate) fn _at(&self, (_x, _y): (usize, usize)) -> Option<Piece> {
-        .id();
+        todo!("return piece at location")
-    let b0d = commands
+    }
-        .spawn((SpatialBundle { ..default() }, Piece::Drone))
+
-        .id();
+    /// Returns a list of all pieces on the board with their location
-    let b1p = commands
+    pub(crate) fn pieces(&self) -> Vec<(BoardIndex, Piece)> {
-        .spawn((SpatialBundle { ..default() }, Piece::Pawn))
+        self.inner
-        .id();
+            .iter()
-    let b2p = commands
+            .enumerate()
-        .spawn((SpatialBundle { ..default() }, Piece::Pawn))
+            .flat_map(|(y, nested)| {
-        .id();
+                nested.iter().enumerate().filter_map(move |(x, p)| {
-    let c5p = commands
+                    p.as_ref().map(|val| (BoardIndex { x, y }, val.clone()))
-        .spawn((SpatialBundle { ..default() }, Piece::Pawn))
+                })
-        .id();
+            })
-    let b5p = commands
+            .collect()
-        .spawn((SpatialBundle { ..default() }, Piece::Pawn))
+    }
-        .id();
+}
-    let b6d = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Drone))
-        .id();
-    let b7q = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Queen))
-        .id();
-    let c0q = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Queen))
-        .id();
-    let c1d = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Drone))
-        .id();
-    let c2p = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Pawn))
-        .id();
-    let c6p = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Pawn))
-        .id();
-    let c7d = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Drone))
-        .id();
-    let d0q = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Queen))
-        .id();
-    let d1q = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Queen))
-        .id();
-    let d2d = commands
-        .spawn((SpatialBundle { ..default() }, Piece::Drone))
-        .id();
 
+impl std::fmt::Display for Board {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        let _ = write!(f, "\n");
+        self.inner.iter().for_each(|row| {
+            let _ = write!(f, "+--+--+--+--+--+--+--+--+\n");
+            let _ = write!(f, "|");
+            row.iter().for_each(|piece| {
+                let _ = match piece {
+                    Some(p) => write!(f, "{} |", p),
+                    None => write!(f, "  |"),
+                };
+            });
+            let _ = write!(f, "\n");
+        });
+        let _ = write!(f, "+--+--+--+--+--+--+--+--+\n");
+        Ok(())
+    }
+}
+
+fn setup_board(mut commands: Commands) {
     commands.insert_resource(Board {
         inner: vec![
             vec![
@@ -108,34 +98,34 @@ fn setup_board(mut commands: Commands) {
                 None,
                 None,
                 None,
-                Some(a5d),
+                Some(Piece::Drone),
-                Some(a6q),
+                Some(Piece::Queen),
-                Some(a7q),
+                Some(Piece::Queen),
             ],
             vec![
-                Some(b0d),
+                Some(Piece::Drone),
-                Some(b1p),
+                Some(Piece::Pawn),
-                Some(b2p),
+                Some(Piece::Pawn),
                 None,
                 None,
-                Some(b5p),
+                Some(Piece::Pawn),
-                Some(b6d),
+                Some(Piece::Drone),
-                Some(b7q),
+                Some(Piece::Queen),
             ],
             vec![
-                Some(c0q),
+                Some(Piece::Queen),
-                Some(c1d),
+                Some(Piece::Drone),
-                Some(c2p),
+                Some(Piece::Pawn),
                 None,
                 None,
-                Some(c5p),
+                Some(Piece::Pawn),
-                Some(c6p),
+                Some(Piece::Pawn),
-                Some(c7d),
+                Some(Piece::Drone),
             ],
             vec![
-                Some(d0q),
+                Some(Piece::Queen),
-                Some(d1q),
+                Some(Piece::Queen),
-                Some(d2d),
+                Some(Piece::Drone),
                 None,
                 None,
                 None,

src/main.rs

@@ -9,8 +9,11 @@ use crate::prelude::*;
 
 fn main() {
     App::new()
+        .add_state::<GameState>()
+        .add_systems(Update, state)
+        .add_systems(Update, loading.run_if(in_state(GameState::Loading)))
         .add_plugins((
-            DefaultPlugins,
+            DefaultPlugins.set(ImagePlugin::default_nearest()),
             audio::AudioPlugin,
             debug::DebugPlugin,
             display2d::Display2dPlugin,
@@ -19,3 +22,33 @@ fn main() {
         ))
         .run();
 }
+
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Default, States)]
+pub enum GameState {
+    #[default]
+    Loading,
+    Menu,
+    Display2d,
+    Display3d,
+}
+
+fn loading(
+    server: Res<AssetServer>,
+    sprites: Res<Assets<Image>>,
+    mut next_state: ResMut<NextState<GameState>>,
+) {
+    let items = { sprites.ids() };
+    let states = server.get_group_load_state(items);
+    match states {
+        LoadState::Loaded | LoadState::NotLoaded => next_state.set(GameState::Display2d),
+        _ => (),
+    }
+}
+
+fn state(state: Option<Res<State<GameState>>>) {
+    state.map(|s| {
+        if s.is_added() || s.is_changed() {
+            info!("Updated state is {:?}", s);
+        }
+    });
+}

src/prelude.rs

@@ -1,2 +1,6 @@
+pub use crate::*;
+pub use bevy::asset::LoadState;
+pub use bevy::gltf::Gltf;
 pub use bevy::prelude::*;
+pub use bevy_fmod::prelude::AudioSource;
 pub use bevy_fmod::prelude::*;