Planned hero entry points: walls glow and pulse red, with a pulsing red light

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/save.rs

@@ -111,4 +111,24 @@ mod tests {
         let l = from_bytes(json.as_bytes()).expect("load");
         assert_eq!(l.game.map.t.len(), 256 * 256);
     }
+
+    // writes a savegame shortly before a wave (with planned entry points) when DC_SAVE_OUT is set
+    #[test]
+    fn dump_entry_warning_save() {
+        let Ok(path) = std::env::var("DC_SAVE_OUT") else { return };
+        let mut g = Game::new(11, 64, 64);
+        for _ in 0..(60 * 20) {
+            g.update(0.05);
+        }
+        g.wave_timer = 31.0;
+        for _ in 0..30 {
+            g.update(0.05); // the scouts warn 30 s before the wave
+        }
+        assert!(!g.planned_entries.is_empty());
+        let (ex, ey) = g.planned_entries[0];
+        let mut cam = Cam::new(ex as f32 + 0.5, ey as f32 + 0.5);
+        cam.zoom = 12.0;
+        std::fs::write(path, to_json(&g, &cam, &Settings { language: "en".into(), ..Settings::default() })).unwrap();
+    }
 }
+