From 91e9e622dee079c8a27d59a2ff7276c923c92e51 Mon Sep 17 00:00:00 2001
From: JP Stringham <jp@bloomdigital.to>
Date: Tue, 3 Feb 2026 20:27:05 -0500
Subject: [PATCH] AutoLayer rendering working sorta

---
 src/ldtk/mod.rs |  4 +++-
 src/main.rs     | 54 ++++++++++++++++++++++++++++++++-----------------
 2 files changed, 38 insertions(+), 20 deletions(-)

diff --git a/src/ldtk/mod.rs b/src/ldtk/mod.rs
index 2638b98..ecb8800 100644
--- a/src/ldtk/mod.rs
+++ b/src/ldtk/mod.rs
@@ -36,6 +36,8 @@ pub struct LayerInstance {
     pub grid_tiles: Vec<Tile>,
     #[serde(alias = "intGridCsv")]
     pub int_grid_tiles: Vec<u32>,
+    #[serde(alias = "autoLayerTiles")]
+    pub al_tiles: Vec<Tile>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -53,7 +55,7 @@ pub struct Tile {
     pub px_coords: UVec2,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
 pub enum LayerType {
     IntGrid,
     Entities,
diff --git a/src/main.rs b/src/main.rs
index b137908..b7e4a8d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,18 +16,22 @@ struct TilemapStuff {
     img_id: Option<AssetId<Image>>,
 }
 
+#[derive(Resource)]
+struct LevelData {
+    ldtk_proj: ldtk::Project,
+}
+
 fn main() {
-    let mut ldtk_proj: ldtk::Project =
+    let ldtk_proj: ldtk::Project =
         serde_json::from_str(include_str!("../assets/test.ldtk")).unwrap();
 
     println!("LDTK {ldtk_proj:?}");
 
-    return;
-
     let mut app = App::new();
 
     app.add_plugins(DefaultPlugins.set(ImagePlugin::default_nearest()))
         .init_state::<AppState>()
+        .insert_resource(LevelData { ldtk_proj })
         .insert_resource(TilemapStuff::default())
         .add_systems(Startup, init)
         .add_systems(Update, loadloop.run_if(in_state(AppState::Preload)))
@@ -42,9 +46,16 @@ fn init(
     mut state: ResMut<NextState<AppState>>,
     mut tmap_stuff: ResMut<TilemapStuff>,
     mut t_layouts: ResMut<Assets<TextureAtlasLayout>>,
+    lvl: Res<LevelData>,
 ) {
     println!("Hello Bevy!");
 
+    let mut orth_proj = OrthographicProjection::default_2d();
+    orth_proj.scale = 0.5;
+    orth_proj.viewport_origin = Vec2::ZERO;
+    commands.spawn((Camera2d, Projection::Orthographic(orth_proj)));
+
+    // load tilemap
     let sprite = assets.load("tilemap.png");
     tmap_stuff.img_id = Some(sprite.id());
     tmap_stuff.img_handle = Some(sprite.clone());
@@ -52,23 +63,28 @@ fn init(
     let t_layout = TextureAtlasLayout::from_grid(uvec2(16, 16), 12, 8, Some(uvec2(1, 1)), None);
     let t_handle = t_layouts.add(t_layout);
 
-    for i in 0..18 {
-        let x = i as f32 * 20.;
-        commands.spawn((
-            Sprite::from_atlas_image(
-                sprite.clone(),
-                TextureAtlas {
-                    layout: t_handle.clone(),
-                    index: i,
-                },
-            ),
-            Transform::from_xyz(x, 0., 0.),
-        ));
-    }
+    // create map from lvl data
 
-    let mut orth_proj = OrthographicProjection::default_2d();
-    orth_proj.scale = 0.25;
-    commands.spawn((Camera2d, Projection::Orthographic(orth_proj)));
+    let lvl = &lvl.ldtk_proj.levels[0];
+
+    lvl.layer_instances.iter().for_each(|li| {
+        if li.ty != ldtk::LayerType::AutoLayer {
+            return;
+        }
+
+        li.al_tiles.iter().for_each(|t| {
+            commands.spawn((
+                Sprite::from_atlas_image(
+                    sprite.clone(),
+                    TextureAtlas {
+                        layout: t_handle.clone(),
+                        index: t.ty as usize,
+                    },
+                ),
+                Transform::from_xyz(t.px_coords.x as f32, 256. - t.px_coords.y as f32, 0.),
+            ));
+        });
+    });
 
     state.set(AppState::Preload);
 }