feat: Add path visualisation (#58)

src/features/pom/mod.rs

@@ -27,12 +27,44 @@ impl Plugin for PomPlugin {
                 move_pom,
                 update_pom,
                 perform_interaction,
+                draw_path,
             )
                 .run_if(in_state(AppState::GameScreen)),
         );
     }
 }
 
+fn draw_path(
+    mut gizmos: Gizmos,
+    query: Query<(&Transform, &PathQueue), With<Pom>>,
+    config: Res<GameConfig>,
+) {
+    let Ok((transform, path_queue)) = query.single() else {
+        return;
+    };
+
+    if path_queue.steps.is_empty() {
+        return;
+    }
+
+    let line_z = 0.5;
+    let mut current_pos = transform.translation;
+    current_pos.z = line_z;
+
+    for step in &path_queue.steps {
+        let next_pos = grid_to_world_coords(
+            step.0,
+            step.1,
+            Some(line_z),
+            config.grid_width,
+            config.grid_height,
+        );
+
+        gizmos.line(current_pos, next_pos, Color::srgba(1.0, 1.0, 1.0, 0.3));
+        current_pos = next_pos;
+    }
+}
+
 fn setup(mut commands: Commands, asset_server: Res<AssetServer>, config: Res<GameConfig>) {
     commands.spawn((
         Pom,