feat: Basic level editing

code/game/core.h

@@ -13,6 +13,25 @@ struct G_Camera {
 	Mat4x4FInv proj;
 };
 
+#define TILE_SIZE 1.0
+
+typedef enum G_EDITOR_MODE G_EDITOR_MODE;
+enum G_EDITOR_MODE {
+  G_EDITOR_MODE_TILE,
+  G_EDITOR_MODE_PROP,
+  G_EDITOR_MODE_HITBOX,
+  G_EDITOR_MODE_POI,
+};
+
+typedef struct G_Editor G_Editor;
+struct G_Editor {
+  bool enabled;
+  U32 currentLevel;
+  S32 currentAsset;
+  G_EDITOR_MODE mode;
+  V2f cursor;
+};
+
 typedef struct G_State G_State;
 struct G_State {
 	M_Arena *arena;
@@ -20,6 +39,7 @@ struct G_State {
 	D_Context draw;
 	G_Camera camera;
 
+  G_Editor editor;
   World *world;
 };