Added recastnavigation support

src/gamedata/GameData.cpp

@@ -106,17 +106,22 @@ void setupExteriorScene(Ogre::SceneManager *scnMgr, Ogre::SceneNode *cameraNode,
 	ecs.set<Camera>({ cameraNode, camera, false });
 	ecs.add<GameData>();
 	ecs.add<Input>();
-	ecs.add<WaterSurface>();
-	ecs.set<Sun>({ nullptr, nullptr, nullptr, nullptr });
-	ecs.set<Terrain>({ nullptr,
-			   nullptr,
-			   nullptr,
-			   nullptr,
-			   nullptr,
-			   nullptr,
-			   nullptr,
-			   false,
-			   { 0, 0, 0 } });
+    ecs.observer<GameState>("Game_Start_Scen_Startup")
+        .event(flecs::OnAdd)
+        .each([](GameState &game) {
+            ECS::get().add<WaterSurface>();
+            ECS::get().set<Sun>(
+                { nullptr, nullptr, nullptr, nullptr });
+            ECS::get().set<Terrain>({ nullptr,
+                          nullptr,
+                          nullptr,
+                          nullptr,
+                          nullptr,
+                          nullptr,
+                          nullptr,
+                          false,
+                          { 0, 0, 0 } });
+        });
 	if (!ecs.has<LuaBase>())
 		ecs.add<LuaBase>();
 	if (!ecs.has<LuaEvent>())