add sea monster

src/Aquarium.cpp

@@ -2,6 +2,7 @@
 #include "Bubble.h"
 #include "Castle.h"
 #include "Fish.h"
+#include "SeaMonster.h"
 #include "Seaweed.h"
 #include "Ship.h"
 #include "Waterline.h"
@@ -46,6 +47,8 @@ void Aquarium::ensureEntitiesSorted() {
 void Aquarium::redraw() {
   clearCurrentFrame();
 
+  ensureBigEntityExists();
+
   std::vector<std::unique_ptr<Entity>> newEntities;
   bool entities_modified = false;
 
@@ -93,7 +96,7 @@ void Aquarium::redraw() {
 
   // Draw all entities
   for (const auto &entity : entities) {
-    entity->draw(0);
+    entity->draw();
   }
 
   renderToScreen();
@@ -119,7 +122,6 @@ void Aquarium::resize() {
 
   addWaterline();
   addCastle();
-  addShip();
   for (int i = 0; i < width / 15; i++)
     addSeaweed();
   for (int i = 0; i < width * (height - 9) / 350; i++)
@@ -132,6 +134,24 @@ void Aquarium::addSeaweed() { addEntityImpl<Seaweed>(); }
 void Aquarium::addWaterline() { addEntityImpl<Waterline>(); }
 void Aquarium::addCastle() { addEntityImpl<Castle>(); }
 void Aquarium::addShip() { addEntityImpl<Ship>(); }
+void Aquarium::addSeaMonster() { addEntityImpl<SeaMonster>(); }
+void Aquarium::ensureBigEntityExists() {
+  // Check if any big entities exist on screen
+  for (const auto &entity : entities) {
+    if (dynamic_cast<Ship *>(entity.get()) ||
+        dynamic_cast<SeaMonster *>(entity.get())) {
+      return; // Big entity found, do nothing
+    }
+  }
+
+  // No big entity found, spawn next in cycle
+  if (big_entity_index % 2 == 0) {
+    addEntityImpl<Ship>();
+  } else {
+    addEntityImpl<SeaMonster>();
+  }
+  ++big_entity_index;
+}
 
 void Aquarium::clearCurrentFrame() {
   for (auto &row : currentFrame) {