feat(grid): draw 3d hex grid

src/lib.rs

@@ -63,7 +63,7 @@ impl Plugin for AppPlugin {
             #[cfg(feature = "demo")]
             demo::plugin,
             #[cfg(not(feature = "demo"))]
-            maze::MazePlugin,
+            maze::plugin::MazePlugin::default(),
             screens::plugin,
             theme::plugin,
         ));
@@ -91,7 +91,7 @@ fn spawn_camera(mut commands: Commands) {
     commands.spawn((
         Name::new("Camera"),
         Camera3dBundle {
-            transform: Transform::from_xyz(0., 15., 10.).looking_at(Vec3::ZERO, Vec3::Y),
+            transform: Transform::from_xyz(0., 100., 0.).looking_at(Vec3::ZERO, Vec3::Y),
             ..default()
         },
         // Render all UI to this camera.

src/maze/mod.rs

@@ -1,31 +1,11 @@
-use bevy::{
-    ecs::{system::RunSystemOnce, world::Command},
-    prelude::*,
-};
-use grid::{generate_maze, plugin, render_maze, spawn_hex_grid};
+use bevy::{ecs::world::Command, prelude::*};
+use plugin::MazePlugin;
 pub mod grid;
+pub mod plugin;
 pub mod prism;
 pub mod resource;
 pub mod tile;
 
-pub struct MazePlugin;
-
-impl Plugin for MazePlugin {
-    fn build(&self, app: &mut App) {
-        app.add_plugins(prism::plugin);
-        app.add_plugins(plugin);
-    }
-}
-
-impl Command for MazePlugin {
-    fn apply(self, world: &mut World) {
-        // world.run_system_once(spawn_hex_grid);
-        // world.run_system_once(generate_maze);
-        // world.run_system_once(render_maze);
-        world.run_system_once(prism::setup);
-    }
-}
-
 pub fn spawn_grid(world: &mut World) {
-    MazePlugin.apply(world);
+    MazePlugin::default().apply(world);
 }

src/maze/plugin.rs

@@ -0,0 +1,25 @@
+use bevy::{
+    ecs::{system::RunSystemOnce, world::Command},
+    prelude::*,
+};
+
+use super::{grid, prism};
+
+#[derive(Default)]
+pub(crate) struct MazePlugin;
+
+impl Plugin for MazePlugin {
+    fn build(&self, app: &mut App) {
+        app.add_plugins(prism::plugin);
+        app.add_plugins(grid::plugin);
+    }
+}
+
+impl Command for MazePlugin {
+    fn apply(self, world: &mut World) {
+        // world.run_system_once(spawn_hex_grid);
+        // world.run_system_once(generate_maze);
+        // world.run_system_once(render_maze);
+        world.run_system_once(prism::setup);
+    }
+}

src/maze/prism.rs

@@ -1,48 +1,20 @@
 use bevy::prelude::*;
 use std::f32::consts::FRAC_PI_2;
 
+use super::{
+    resource::{Layout, MazeConfig},
+    tile::Tile,
+};
+
 pub(super) fn plugin(app: &mut App) {
-    app.add_systems(Update, spawn_light);
-}
-
-#[derive(Debug, Reflect, Component)]
-#[reflect(Component)]
-struct Prism {
-    radius: f32,
-    height: f32,
-}
-
-struct PrismParams {
-    position: Vec3,
-    radius: f32,
-    height: f32,
-}
-
-impl From<Vec3> for PrismParams {
-    fn from(value: Vec3) -> Self {
-        Self {
-            position: value,
-            ..default()
-        }
-    }
-}
-
-impl Default for PrismParams {
-    fn default() -> Self {
-        Self {
-            position: Vec3::ZERO,
-            radius: 2.,
-            height: 4.,
-        }
-    }
+    app.add_systems(Startup, spawn_light);
 }
 
 pub(super) fn spawn_light(mut commands: Commands) {
     commands.spawn((
         Name::new("Light Source"),
         PointLightBundle {
-            point_light: PointLight { ..default() },
-            transform: Transform::from_xyz(5., 10., 5.),
+            transform: Transform::from_xyz(0., 50., 0.),
             ..default()
         },
     ));
@@ -52,31 +24,51 @@ pub(super) fn setup(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
+    config: Res<MazeConfig>,
+    layout: Res<Layout>,
 ) {
-    let prism_material = materials.add(Color::WHITE);
+    let radius = config.radius as i32;
 
-    let prisms: Vec<PrismParams> = vec![Vec3::ZERO.into()];
+    let rotation = Quat::from_rotation_x(-FRAC_PI_2);
+    let material = materials.add(Color::WHITE);
+    let prism_mesh = generate_hex_prism_mesh(layout.hex_size.x, config.height);
+    let mesh = meshes.add(prism_mesh);
 
-    for params in prisms {
-        let hexagon = RegularPolygon {
-            sides: 6,
-            circumcircle: Circle::new(params.radius),
-        };
-        let prism_shape = Extrusion::new(hexagon, params.height);
-        let prism_mesh = meshes.add(Mesh::from(prism_shape));
-
-        commands.spawn((
-            PbrBundle {
-                mesh: prism_mesh,
-                material: prism_material.clone(),
-                transform: Transform::from_translation(params.position)
-                    .with_rotation(Quat::from_rotation_x(FRAC_PI_2)),
+    commands
+        .spawn((
+            Name::new("Floor"),
+            SpatialBundle {
+                transform: Transform::from_translation(Vec3::ZERO),
                 ..default()
             },
-            Prism {
-                radius: params.radius,
-                height: params.height,
-            },
-        ));
-    }
+        ))
+        .with_children(|p| {
+            for q in -radius..=radius {
+                let r1 = (-radius).max(-q - radius);
+                let r2 = radius.min(-q + radius);
+                for r in r1..=r2 {
+                    let tile = Tile::new(q, r);
+                    let pos = tile.to_vec3(&layout);
+                    p.spawn((
+                        Name::new(format!("Hex {}", &tile.to_string())),
+                        PbrBundle {
+                            mesh: mesh.clone(),
+                            material: material.clone(),
+                            transform: Transform::from_translation(pos).with_rotation(rotation),
+                            ..default()
+                        },
+                    ));
+                }
+            }
+        });
+}
+
+fn generate_hex_prism_mesh(radius: f32, depth: f32) -> Mesh {
+    let hexagon = RegularPolygon {
+        sides: 6,
+        circumcircle: Circle::new(radius),
+    };
+    let prism_shape = Extrusion::new(hexagon, depth);
+
+    Mesh::from(prism_shape)
 }

src/maze/resource.rs

@@ -7,6 +7,7 @@ use rand::{thread_rng, Rng};
 pub struct MazeConfig {
     pub radius: u32,
     pub size: f32,
+    pub height: f32,
     pub start_pos: Hex,
     pub end_pos: Hex,
 }
@@ -27,7 +28,8 @@ impl Default for MazeConfig {
         debug!("End pos: ({},{})", end_pos.x, end_pos.y);
         Self {
             radius: radius as u32,
-            size: 10.,
+            size: 5.,
+            height: 5.,
             start_pos,
             end_pos,
         }

src/maze/tile.rs

@@ -1,7 +1,7 @@
 use std::fmt::Display;
 
 use bevy::prelude::*;
-use hexx::Hex;
+use hexx::{Hex, HexLayout};
 
 #[derive(Debug, Reflect, Component, Default, PartialEq, Eq, Hash, Clone)]
 #[reflect(Component)]
@@ -31,6 +31,15 @@ impl Tile {
     pub fn visit(&mut self) {
         self.visited = true;
     }
+
+    pub fn to_vec2(&self, layout: &HexLayout) -> Vec2 {
+        layout.hex_to_world_pos(self.hex)
+    }
+
+    pub fn to_vec3(&self, layout: &HexLayout) -> Vec3 {
+        let pos = self.to_vec2(layout);
+        Vec3::new(pos.x, 0., pos.y)
+    }
 }
 
 impl Display for Tile {