Now using a simple collision map to track entities and then determine if they're near the player for attacking.

gui.cpp

@@ -22,6 +22,7 @@
 #include "rand.hpp"
 #include "components.hpp"
 #include "systems.hpp"
+#include "collider.hpp"
 
 using std::string;
 using namespace fmt;
@@ -277,6 +278,9 @@ void GUI::configure_world() {
   ActionLog log{{"Welcome to the game!"}};
   $world.set<ActionLog>(log);
 
+  SpatialHashTable collider;
+  $world.set<SpatialHashTable>(collider);
+
   $world.assign<Position>(player.entity, {$game_map.place_entity(0)});
   $world.assign<Motion>(player.entity, {0, 0});
   $world.assign<Combat>(player.entity, {100, 10});
@@ -298,6 +302,8 @@ void GUI::configure_world() {
   $world.assign<Position>(gold, {$game_map.place_entity($game_map.room_count() - 1)});
   $world.assign<Treasure>(gold, {100});
   $world.assign<Tile>(gold, {"$"});
+
+  System::init_positions($world);
 }
 
 void GUI::render_scene() {