Systems now control most of the game's operations and a lot of the rendering logic, this now brings in a camera so maps can be larger than the viewport.

map.hpp

@@ -3,12 +3,18 @@
 #include <utility>
 #include <string>
 #include <random>
+#include <algorithm>
+#include <fmt/core.h>
 
 #define INV_WALL 0
 #define INV_SPACE 1
-
 #define WALL_VALUE 1
 #define SPACE_VALUE 0
+#define WALL_TILE "█"
+#define FLOOR_TILE "·"
+#define PLAYER_TILE "☺"
+#define ENEMY_TILE "Ω"
+
 
 struct Point {
   size_t x = 0;
@@ -81,4 +87,14 @@ public:
   void set_door(Room &room, int value);
   void dump();
   Point place_entity(size_t room_index);
+
+  Point map_to_camera(const Point &loc, const Point &cam_orig) {
+    return {loc.x - cam_orig.x, loc.y - cam_orig.y};
+  }
+
+  Point center_camera(const Point &around, size_t view_x, size_t view_y) {
+    size_t start_x = std::clamp(int(around.x - view_x / 2), 0, int(width() - view_x));
+    size_t start_y = std::clamp(int(around.y - view_y / 2), 0, int(height() - view_y));
+    return {start_x, start_y};
+  }
 };