Placeholder for lines

tetris/src/blocks.rs

@@ -379,7 +379,7 @@ fn setup_grid(
     mut materials: ResMut<Assets<ColorMaterial>>,
     mut checklist: ResMut<SetupChecklist>,
 ) {
-    let m: Mesh = Rectangle::new(SCALE, SCALE).into();
+    let m: Mesh = Rectangle::new(SCALE * 0.9, SCALE * 0.9).into();
     let mh: Handle<Mesh> = meshes.add(m);
     let m2d = Mesh2d(mh);
     let c: Color = WHITE.with_alpha(0.5).into();
@@ -387,10 +387,15 @@ fn setup_grid(
     let mat = MeshMaterial2d(ch);
     let t = Transform::from_xyz(0.0, 0.0, -1.0);
 
-    for x in 0..X_MAX {
-        for y in 0..Y_MAX {
+    for y in 0..Y_MAX {
+        // Spawn this line
+        let gp = GridPosition { x: 0, y };
+        commands.spawn((gp, Line(y as u8), LineBlocks::default(), t));
+
+        // Spawn the grid squares for this line
+        for x in 0..X_MAX {
             let gp = GridPosition { x, y };
-            commands.spawn((gp, m2d.clone(), mat.clone(), t.clone()));
+            commands.spawn((gp, m2d.clone(), mat.clone(), t));
         }
     }
 
@@ -407,6 +412,20 @@ struct ShapeBlock(Entity);
 #[relationship_target(relationship = ShapeBlock)]
 struct ShapeBlocks(Vec<Entity>);
 
+/// Line number component
+#[derive(Component)]
+struct Line(u8);
+
+/// Blocks <- Line Relationship
+#[derive(Component)]
+#[relationship(relationship_target = LineBlocks)]
+struct LineBlock(Entity);
+
+/// Line -> Blocks Relationship
+#[derive(Component, Default)]
+#[relationship_target(relationship = LineBlock)]
+struct LineBlocks(Vec<Entity>);
+
 /// Event handler for transforming a handle component into a thing
 fn add_shape(
     event: On<Add, AssetComponent<ShapeAsset>>,