Fog of War now works fairly normally, but I think I'll have to do something so people don't live in the map. Probably something like hearing distance is increased because you're louder with a map out, and you can't see enemies on the map.

lights.cpp

@@ -50,7 +50,6 @@ namespace lighting {
         if($paths.$paths[it.y][it.x] == WALL_PATH_LIMIT) {
           $lightmap[it.y][it.x] = light_level(source.strength, 1.5f, point.x, point.y);
         }
-        $fow[it.y][it.x] = $lightmap[it.y][it.x];
       }
     }
   }
@@ -74,6 +73,14 @@ namespace lighting {
     $paths.set_target(at, value);
   }
 
+  void LightRender::update_fow(Point at, LightSource source) {
+    for(matrix::circle it{$lightmap, at, source.radius}; it.next();) {
+      for(auto x = it.left; x < it.right; x++) {
+        $fow[it.y][x] = $lightmap[it.y][x];
+      }
+    }
+  }
+
   void LightRender::path_light(Matrix &walls) {
     $paths.compute_paths(walls);
   }