Board index I think is key for bridging game resource to display

examples/sprites-2d.rs

@@ -35,6 +35,12 @@ struct SpriteSheet {
 #[derive(Debug, Component)]
 struct Board2d;
 
+#[derive(Debug, Component)]
+struct BoardIndex {
+    x: usize,
+    y: usize,
+}
+
 /// STARTUP: Initialize 2d gameplay Camera
 fn initialize_camera(mut commands: Commands) {
     commands.spawn(Camera2dBundle::default());
@@ -87,11 +93,14 @@ fn initialize_board(sprite_sheet: Option<Res<SpriteSheet>>, mut commands: Comman
 
                     let texture_atlas = sprite_sheet.handle.clone();
 
+                    let index = BoardIndex { x, y };
+
                     // Rectangle
                     parent.spawn(SpriteSheetBundle {
                         texture_atlas,
                         sprite,
                         transform,
+                        index,
                         ..default()
                     });
                 }