You now have blood on your screen when below half health.

assets/config.json

@@ -16,7 +16,8 @@
     "rope_vines_up": "assets/rope_vines_up-256.png",
     "tripwire_trap": "assets/tripwire_trap-256.png",
     "cinqueda": "assets/cinqueda_1-256.png",
-    "left_gui": "assets/left_gui.png"
+    "left_gui": "assets/left_gui.png",
+    "blood_splatter": "assets/blood_splatter-256.png"
   },
   "enemy": {
     "HEARING_DISTANCE": 20
@@ -24,7 +25,7 @@
   "player": {
   },
   "worldgen": {
-    "enemy_probability": 20,
+    "enemy_probability": 80,
     "empty_room_probability": 10,
     "device_probability": 30
   }

assets/enemies.json

@@ -6,7 +6,7 @@
         "foreground": [255, 200, 125],
         "background": [30, 20, 75]
       },
-      {"_type": "Combat", "hp": 200, "damage": 15, "dead": false},
+      {"_type": "Combat", "hp": 200, "max_hp": 200, "damage": 15, "dead": false},
       {"_type": "Motion", "dx": 0, "dy": 0, "random": false},
       {"_type": "LightSource", "strength": 60, "radius": 1.8},
       {"_type": "EnemyConfig", "hearing_distance": 5},
@@ -19,7 +19,7 @@
         "foreground": [131, 213, 238],
         "background": [30, 20, 75]
       },
-      {"_type": "Combat", "hp": 20, "damage": 1, "dead": false},
+      {"_type": "Combat", "hp": 20, "max_hp": 20, "damage": 1, "dead": false},
       {"_type": "Motion", "dx": 0, "dy": 0, "random": false},
       {"_type": "LightSource", "strength": 40, "radius": 1.2},
       {"_type": "EnemyConfig", "hearing_distance": 5},
@@ -32,7 +32,7 @@
         "foreground": [205, 164, 246],
         "background": [30, 20, 75]
       },
-      {"_type": "Combat", "hp": 50, "damage": 10, "dead": false},
+      {"_type": "Combat", "hp": 50, "max_hp": 20, "damage": 50, "dead": false},
       {"_type": "Motion", "dx": 0, "dy": 0, "random": false},
       {"_type": "EnemyConfig", "hearing_distance": 10},
       {"_type": "Sprite", "name": "evil_eye"}

assets/items.json

@@ -65,7 +65,7 @@
         "foreground": [255, 205, 189],
         "background": [255, 205, 189]
       },
-      {"_type": "Curative", "hp": 20},
+      {"_type": "Curative", "hp": 200},
       {"_type": "Sprite", "name": "healing_potion_small"}
     ]
   }

components.cpp

@@ -8,7 +8,7 @@ namespace components {
   ENROLL_COMPONENT(Curative, hp);
   ENROLL_COMPONENT(EnemyConfig, hearing_distance);
   ENROLL_COMPONENT(Motion, dx, dy, random);
-  ENROLL_COMPONENT(Combat, hp, damage, dead);
+  ENROLL_COMPONENT(Combat, hp, max_hp, damage, dead);
   ENROLL_COMPONENT(LightSource, strength, radius);
   ENROLL_COMPONENT(Device, config, events);
   ENROLL_COMPONENT(Sprite, name);

components.hpp

@@ -58,6 +58,7 @@ namespace components {
 
   struct Combat {
     int hp;
+    int max_hp;
     int damage;
 
     /* NOTE: This is used to _mark_ entities as dead, to detect ones that have just died. Don't make attack automatically set it.*/

constants.hpp

@@ -13,6 +13,7 @@ constexpr const int RAY_VIEW_Y=0;
 constexpr const bool VSYNC=false;
 constexpr const int FRAME_LIMIT=60;
 constexpr const int NUM_SPRITES=1;
+constexpr const int MAX_LOG_MESSAGES=20;
 
 #ifdef NDEBUG
 constexpr const bool DEBUG_BUILD=false;

gui.cpp

@@ -6,6 +6,7 @@
 #include "components.hpp"
 #include <numbers>
 #include "systems.hpp"
+#include "events.hpp"
 
 
 namespace gui {
@@ -50,6 +51,7 @@ namespace gui {
     $rayview.position_camera($player.x + 0.5, $player.y + 0.5);
 
     $status_view.create_render();
+    $status_view.log("Welcome to the game!");
 
     $renderer.init_terminal();
     $map_view.create_render();
@@ -143,6 +145,7 @@ namespace gui {
         state(State::MAPPING);
         break;
       case ATTACK:
+        $status_view.log("You attack!");
         $rotation = -30.0f;
         state(State::ATTACKING);
         break;
@@ -215,6 +218,9 @@ namespace gui {
             auto& debug = $level.world->get_the<Debug>();
             debug.FPS = !debug.FPS;
             debug.PATHS = !debug.PATHS;
+            auto player = $level.world->get_the<Player>();
+            auto& player_combat = $level.world->get<Combat>(player.entity);
+            player_combat.hp = player_combat.max_hp;
            } break;
           default:
             break; // ignored
@@ -253,6 +259,18 @@ namespace gui {
     $window.draw($text);
   }
 
+  void FSM::draw_blood() {
+    auto player = $level.world->get_the<Player>();
+    auto player_combat = $level.world->get<Combat>(player.entity);
+
+    if(float(player_combat.hp) / float(player_combat.max_hp) < 0.5) {
+      auto blood = $textures.sprite_textures.at("blood_splatter").sprite;
+      blood->setPosition({RAY_VIEW_X,0});
+      blood->setScale({3.0, 3.0});
+      $window.draw(*blood);
+    }
+  }
+
   void FSM::draw_gui() {
     sf::RectangleShape rect({SCREEN_WIDTH - RAY_VIEW_WIDTH, SCREEN_HEIGHT});
     rect.setPosition({0,0});
@@ -290,6 +308,7 @@ namespace gui {
       $stats.sample(1/elapsed.count());
 
       draw_gui();
+      draw_blood();
       draw_weapon();
     }
 
@@ -314,9 +333,49 @@ namespace gui {
     System::motion($level);
     System::lighting($level);
     System::death($level);
+    handle_world_events();
   }
 
   bool FSM::active() {
     return !in_state(State::END);
   }
+
+  void FSM::handle_world_events() {
+    using eGUI = Events::GUI;
+    auto& world = *$level.world;
+
+    while(world.has_event<eGUI>()) {
+      auto [evt, entity, data] = world.recv<eGUI>();
+
+      switch(evt) {
+        case eGUI::COMBAT: {
+            auto &damage = std::any_cast<Events::Combat&>(data);
+            auto enemy_combat = world.get<Combat>(entity);
+
+            if(damage.enemy_did > 0) {
+              $status_view.log(fmt::format("Enemy HIT YOU for {} damage!", damage.enemy_did));
+              $status_view.log(fmt::format("-- Enemy has {} HP left.", enemy_combat.hp));
+            } else {
+              $status_view.log("Enemy MISSED YOU.");
+            }
+
+            if(damage.player_did > 0) {
+              $status_view.log(fmt::format("You HIT enemy for {} damage!", damage.player_did));
+            } else {
+              $status_view.log("You MISSED the enemy.");
+            }
+          }
+          break;
+        case eGUI::LOOT: {
+            // auto &item = std::any_cast<InventoryItem&>(data);
+            // $status_view.log(fmt::format("You picked up a {}.",
+            //      std::string(item.data["name"])));
+            $status_view.log("You picked up an item.");
+          }
+          break;
+        default:
+          $status_view.log(fmt::format("INVALID EVENT! {},{}", evt, entity));
+      }
+    }
+  }
 }

gui.hpp

@@ -74,10 +74,12 @@ namespace gui {
       void draw_weapon();
       void draw_stats();
       void draw_gui();
+      void draw_blood();
       void render();
       void mouse();
       void generate_map();
       bool active();
       void run_systems();
+      void handle_world_events();
   };
 }

status_ui.cpp

@@ -25,10 +25,7 @@ namespace gui {
         const auto& player_combat = $level.world->get<Combat>(player.entity);
         const auto& combat = $level.world->get<Combat>(player.entity);
 
-        std::vector<Element> log_list;
+        auto log_box = vbox($log_list) | yflex_grow | border;
-        log_list.push_back(text("Log messages here."));
-
-        auto log_box = vbox(log_list) | yflex_grow;
 
         return hbox({
             hflow(
@@ -45,4 +42,16 @@ namespace gui {
 
     set_renderer(status_rend);
   }
+
+  void StatusUI::log(std::string msg) {
+    $messages.push_front(msg);
+    if($messages.size() > MAX_LOG_MESSAGES) {
+      $messages.pop_back();
+    }
+
+    $log_list.clear();
+    for(auto msg : $messages) {
+      $log_list.push_back(text(msg));
+    }
+  }
 }

status_ui.hpp

@@ -2,13 +2,17 @@
 #include "panel.hpp"
 #include "levelmanager.hpp"
 #include "constants.hpp"
+#include <deque>
 
 namespace gui {
   class StatusUI : public Panel {
     public:
+      std::vector<Element> $log_list;
+      std::deque<std::string> $messages;
       GameLevel $level;
       StatusUI(GameLevel level);
       void create_render();
       void update_level(GameLevel &level) { $level = level; }
+      void log(std::string msg);
   };
 }

systems.cpp

@@ -180,7 +180,7 @@ void System::collision(GameLevel &level) {
 
         if(world.has<Curative>(entity)) {
           auto& cure = world.get<Curative>(entity);
-          player_combat.hp += cure.hp;
+          player_combat.hp = std::min(player_combat.hp + cure.hp, player_combat.max_hp);
           world.remove<Curative>(entity);
         }