Add fields to EWorld class.

include/app/elements.h

@@ -2,6 +2,7 @@
 #define ELEMENTS_H
 
 #include "bindings/ruby.h"
+#include "ecs/ecs.h"
 #include "localization/localization.h"
 #include "utils.h"
 #include "window/window.h"
@@ -84,14 +85,23 @@ struct ERect : Element {
 };
 
 struct EWorld : Element {
-#warning need to implement ecs system first before implementing this
+  EWorld() : Element(Type::WORLD) {}
-  uint64_t world_id = UINT64_MAX;
-
-  EWorld(uint64_t world_id) : Element(Type::WORLD), world_id(world_id) {}
 
   Vec2<float> size() override;
 
   void render(uint64_t) override;
+
+  Vec2<float> cam_pos;
+  float cam_rotation = 0;
+  Vec2<float> cam_scale = {1, 1};
+
+  using V = std::variant<int64_t, double, bool, Ruby::RubyObject>;
+
+  void add_component(
+    std::string_view name,
+    std::unordered_map<std::string, Component::Type, V> fields,
+    std::unordered_map<std::string, Component::Type, V> globals
+  );
 };
 
 inline Pool<Element> element_pool;