From d289460ced029932ba71674c329c7ead35aad15a Mon Sep 17 00:00:00 2001
From: Daniel Flanagan <daniel@lyte.dev>
Date: Fri, 2 Aug 2024 16:43:30 -0500
Subject: [PATCH] Basic mapgen with bevy_ecs_tilemap

---
 src/map.rs    | 97 +++++++++++++++++++++++++--------------------------
 src/player.rs |  2 +-
 2 files changed, 48 insertions(+), 51 deletions(-)

diff --git a/src/map.rs b/src/map.rs
index e2fa50d..a97de96 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -3,7 +3,7 @@ use crate::{inspector::HideFromInspector, prelude::*};
 //     ecs::world::CommandQueue,
 //     tasks::{AsyncComputeTaskPool, Task},
 // };
-// use bevy_ecs_tilemap::prelude::*;
+use bevy_ecs_tilemap::prelude::*;
 use rand::prelude::*;
 use rand_pcg::Pcg64;
 use rand_seeder::Seeder;
@@ -14,60 +14,57 @@ pub struct Tilemap;
 // #[derive(Component)]
 // struct MapGen(Task<CommandQueue>);
 
-/// This worked but had performance issues, so I decided to go with bevy_ecs_tilemap
-pub fn spawn_raw_tiles(mut commands: Commands, assets: Res<AssetServer>) {
+pub fn spawn(mut commands: Commands, assets: Res<AssetServer>) {
+    // TODO: I'm pretty determined to not have this sieze up the game. Should work with a "loading" screen.
     // let task_pool = AsyncComputeTaskPool::get();
 
     // let task = task_pool.spawn(async move {});
 
-    let texture: Handle<Image> = assets.load("img/Tileset Grass.png");
     let mut rng: Pcg64 = Seeder::from("default_seed").make_rng();
-    let map_size = UVec2::new(1024, 1024);
-    let tile_size = UVec2 { x: 16, y: 16 };
-    commands
-        .spawn((
-            Tilemap,
-            Name::new("Tilemap"),
-            SpatialBundle {
-                transform: Transform::from_xyz(0., 0., f32::MIN),
-                ..default()
-            },
-        ))
-        .with_children(|tilemap| {
-            let layout = assets.add(TextureAtlasLayout::from_grid(
-                tile_size,
-                16,
-                16,
-                Some(UVec2 { x: 0, y: 0 }),
-                Some(UVec2 { x: 0, y: 0 }),
-            ));
-            let u_center = (map_size * tile_size) / 2;
-            let center = Vec2::new(u_center.x as f32, u_center.y as f32);
-            for x in 0..map_size.x {
-                for y in 0..map_size.y {
-                    let u_pos = UVec2::new(x, y) * tile_size;
-                    let pos = Vec2::new(u_pos.x as f32, u_pos.y as f32) - center;
-                    let index = if rng.gen_range(0..1000) > 925 {
-                        rng.gen_range(0..(16 * 8))
-                    } else {
-                        0
-                    };
-                    tilemap.spawn((
-                        HideFromInspector,
-                        SpriteBundle {
-                            texture: texture.clone(),
-                            transform: Transform::from_xyz(pos.x as f32, pos.y as f32, 0.),
-                            ..default()
-                        },
-                        TextureAtlas {
-                            layout: layout.clone(),
-                            index,
-                            ..default()
-                        },
-                    ));
-                }
-            }
-        });
+    let size = TilemapSize::new(1024, 1024);
+    let tilemap = commands.spawn((Tilemap, Name::new("Tilemap"))).id();
+
+    let mut storage = TileStorage::empty(size);
+    // let mutex_storage = Mutex::new(storage);
+
+    for x in 0..size.x {
+        for y in 0..size.y {
+            let position = TilePos::new(x, y);
+            let texture_index = TileTextureIndex(if rng.gen_range(0..1000) > 925 {
+                rng.gen_range(0..(16 * 8))
+            } else {
+                0
+            });
+            let tile = commands
+                .spawn((
+                    HideFromInspector,
+                    TileBundle {
+                        position,
+                        tilemap_id: TilemapId(tilemap),
+                        texture_index,
+                        ..Default::default()
+                    },
+                ))
+                .id();
+            storage.set(&position, tile);
+        }
+    }
+
+    let texture = TilemapTexture::Single(assets.load("img/Tileset Grass.png"));
+    let tile_size = TilemapTileSize::new(16., 16.);
+    let grid_size = TilemapGridSize::new(16., 16.);
+    let map_type = TilemapType::Square;
+
+    commands.entity(tilemap).insert(TilemapBundle {
+        grid_size,
+        map_type,
+        size,
+        storage,
+        texture,
+        tile_size,
+        transform: get_tilemap_center_transform(&size, &grid_size, &map_type, f32::MIN),
+        ..Default::default()
+    });
 }
 
 // pub fn spawn_in_background(mut commands: Commands, assets: Res<AssetServer>) {
diff --git a/src/player.rs b/src/player.rs
index 3e76deb..3a59304 100644
--- a/src/player.rs
+++ b/src/player.rs
@@ -5,7 +5,7 @@ use crate::movement::{Heading, Mover, Speed, Velocity, YSortable};
 use crate::prelude::*;
 use bevy::sprite::MaterialMesh2dBundle;
 
-const PLAYER_SPEED: f32 = 500.;
+const PLAYER_SPEED: f32 = 200.;
 
 #[derive(Component, Debug)]
 pub struct Player;