Tests are failing but catch2 is too stupid to actually tell me where so here you go. Now if you hit L it'll turn the lights up to max and if you hit P it will show the pathing.

components.hpp

@@ -49,4 +49,9 @@ namespace components {
   struct EnemyConfig {
     int HEARING_DISTANCE;
   };
+
+  struct Debug {
+    bool PATHS=false;
+    bool LIGHT=false;
+  };
 }

gui.cpp

@@ -201,6 +201,12 @@ bool GUI::handle_ui_events() {
         resize_map(map_font_size + 10);
       } else if(KB::isKeyPressed(KB::Hyphen)) {
         resize_map(map_font_size - 10);
+      } else if(KB::isKeyPressed(KB::L)) {
+        auto &debug = $world.get_the<Debug>();
+        debug.LIGHT = !debug.LIGHT;
+      } else if(KB::isKeyPressed(KB::P)) {
+        auto &debug = $world.get_the<Debug>();
+        debug.PATHS = !debug.PATHS;
       } else if(KB::isKeyPressed(KB::S)) {
         save_world();
       } else if(KB::isKeyPressed(KB::Tab)) {

main.cpp

@@ -24,6 +24,7 @@ namespace fs = std::filesystem;
  */
 void configure_world(DinkyECS::World &world, Map &game_map) {
   const auto &config = world.get_the<MapConfig>();
+  world.set_the<Debug>({});
   // configure a player as a fact of the world
   Player player{world.entity()};
   world.set_the<Player>(player);

status.txt

@@ -4,6 +4,7 @@ TODAY'S GOAL:
 * Water icon \u224b
 * Flame pillars icon \u2e3e
 * Room should always be found.
+* matrix::in_box needs a rectangle alternative
 
 * Study https://github.com/hirdrac/gx_lib/blob/main/gx/Unicode.hh
 * Study this https://en.cppreference.com/w/cpp/language/explicit

systems.cpp

@@ -10,8 +10,6 @@
 #include "dbc.hpp"
 #include "lights.hpp"
 
-const bool DEBUG_MAP=false;
-
 using std::string;
 using namespace fmt;
 using namespace components;
@@ -177,6 +175,7 @@ void System::draw_entities(DinkyECS::World &world, Map &game_map, const Matrix &
 }
 
 void System::draw_map(DinkyECS::World &world, Map &game_map, const Matrix &lighting, ftxui::Canvas &canvas, size_t view_x, size_t view_y) {
+  const auto& debug = world.get_the<Debug>();
   const auto& config = world.get_the<MapConfig>();
   const auto& player = world.get_the<Player>();
   const auto& player_position = world.get<Position>(player.entity);
@@ -190,14 +189,14 @@ void System::draw_map(DinkyECS::World &world, Map &game_map, const Matrix &light
   for(size_t y = 0; y < end_y; ++y) {
     for(size_t x = 0; x < end_x; ++x) {
       string tile = walls[start.y+y][start.x+x] == 1 ? config.WALL_TILE : config.FLOOR_TILE;
-      int light_value = lighting[start.y+y][start.x+x];
+      int light_value = debug.LIGHT ? 160 : lighting[start.y+y][start.x+x];
 
       if(tile == config.WALL_TILE) {
         canvas.DrawText(x * 2, y * 4, config.WALL_TILE, [light_value](auto &pixel) {
           pixel.foreground_color = Color::HSV(230, 20, 10);
           pixel.background_color = Color::HSV(230, 20, light_value / 2);
         });
-      } else if(DEBUG_MAP) {
+      } else if(debug.PATHS) {
         int dnum = paths[start.y+y][start.x+x];
         string num = format("{:x}", dnum);
         num = num.size() > 2 ? "*" : num;