entity per world

Game/Entity/Entity.h

@@ -30,6 +30,32 @@ concept EntityConcept = requires(EntityType entity) {
     requires std::same_as<decltype(entity.base), Entity*>;
 };
 
+inline constexpr EntityID make_entity_id(uint8 user_id, uint64 local_counter)
+{
+    Assert(user_id != kInvalid_user_id);
+    Assert((local_counter & kEntityID_user_id_mask) == kInvalid_entity_id);
+
+    EntityID result = kInvalid_user_id;
+    result          = ((EntityID)user_id << kEntityID_user_id_shift) | (local_counter & kEntityID_user_id_mask);
+    return result;
+}
+
+inline constexpr uint8 get_user_id(EntityID entity_id)
+{
+    return (((uint8)entity_id & kEntityID_user_id_mask) << kEntityID_user_id_shift);
+}
+
+inline constexpr uint64 get_local_counter(EntityID entity_id)
+{
+    return (uint64)entity_id & kEntityID_user_id_mask;
+}
+
+inline constexpr bool is_entity_id_valid(EntityID entity_id)
+{
+    bool result = entity_id != kInvalid_entity_id;
+    return result;
+}
+
 template <typename EntityType>
     requires EntityConcept<EntityType>
 [[nodiscard]] bool IsA(const Entity* entity)
@@ -66,6 +92,12 @@ template <typename EntityType>
 
 void serialize(Archive& ar, NonNullPtr<Entity> entity);
 
+JULIET_API uint8 get_local_user_id();
+
+JULIET_API String format_entity_id(NonNullPtr<Arena> arena, EntityID id);
+
+JULIET_API bool parse_entity_id(String str, EntityID& outId);
+
 [[nodiscard]] const Class* find_class_by_name(String name);
 
 [[nodiscard]] const Class* resolve_entity_class(uint8 kind, uint32 crc);