Basic ability to create a 'stage' for a boss fight, which is a thing in front the boss animates behind.

assets/bosses.json

@@ -1,7 +1,11 @@
 {
   "RAT_KING": {
     "components": [
-      {"_type": "BossFight", "background": "boss_fight_background", "weapon_sound": "Sword_Hit_2"},
+      {"_type": "BossFight",
+        "background": "boss_fight_background",
+        "stage": "none",
+        "weapon_sound": "Sword_Hit_2"
+      },
       {"_type": "Combat", "hp": 20, "max_hp": 20, "damage": 20, "dead": false},
       {"_type": "Animation", "easing": 3, "ease_rate": 0.2, "simple": false, "frames": 2, "speed": 0.02, "scale": 0.2},
       {"_type": "Sprite", "name": "rat_king_boss", "width": 720, "height": 720, "scale": 0.8, "stationary": false},
@@ -12,6 +16,7 @@
     "components": [
       {"_type": "BossFight",
         "background": "devils_fingers_background",
+        "stage": "none",
         "weapon_sound": "Sword_Hit_2"
       },
       {"_type": "Combat", "hp": 20, "max_hp": 20, "damage": 20, "dead": false},

assets/config.json

@@ -48,7 +48,10 @@
     "down_the_well": "assets/down_the_well.jpg",
     "boss_fight_background": "assets/rat_king_boss_fight_background.jpg",
     "devils_fingers_background": "assets/devils_fingers_background.jpg",
-    "devils_fingers_sprite": "assets/devils_fingers_sprite.png"
+    "devils_fingers_sprite": "assets/devils_fingers_sprite.png",
+    "devils_fingers_stage": "assets/devils_fingers_stage.png",
+    "tunnel_with_rocks": "assets/tunnel_with_rocks.png",
+    "tunnel_with_rocks_stage": "assets/tunnel_with_rocks_stage.png"
   },
   "worldgen": {
     "enemy_probability": 80,

boss_fight_ui.cpp

@@ -50,9 +50,16 @@ namespace gui {
 
   void BossFightUI::configure_background() {
     auto& boss = $world->get<components::BossFight>($boss_id);
+    $boss_has_stage = boss.stage != "none";
+
     $boss_background = textures::get(boss.background);
     $boss_background.sprite->setPosition({BOSS_VIEW_X, BOSS_VIEW_Y});
     $status.world().set_the<Background>({$status.$parser});
+
+    if($boss_has_stage) {
+      $boss_stage = textures::get(boss.stage);
+      $boss_stage.sprite->setPosition({BOSS_VIEW_X, BOSS_VIEW_Y});
+    }
   }
 
   void BossFightUI::configure_gui() {
@@ -114,6 +121,10 @@ namespace gui {
       window.draw(*$boss_image.sprite);
     }
 
+    if($boss_has_stage) {
+      window.draw(*$boss_stage.sprite);
+    }
+
     if($combat.hp == 0) {
       $overlay.show_label("overlay_1", "YOU WON!");
       $overlay.show_label("overlay_4", "CLICK TO CONTINUE...");

boss_fight_ui.hpp

@@ -28,6 +28,8 @@ namespace gui {
       guecs::UI $overlay;
       textures::SpriteTexture $boss_image;
       textures::SpriteTexture $boss_background;
+      bool $boss_has_stage = false;
+      textures::SpriteTexture $boss_stage;
       std::shared_ptr<DinkyECS::World> $world = nullptr;
       DinkyECS::Entity $boss_id;
       components::GameConfig& $config;

components.hpp

@@ -69,6 +69,7 @@ namespace components {
 
   struct BossFight {
     std::string background;
+    std::string stage;
     std::string weapon_sound;
   };
 
@@ -128,7 +129,7 @@ namespace components {
   template <typename T> struct NameOf;
 
   ENROLL_COMPONENT(Tile, display, foreground, background);
-  ENROLL_COMPONENT(BossFight, background, weapon_sound);
+  ENROLL_COMPONENT(BossFight, background, stage, weapon_sound);
   ENROLL_COMPONENT(Sprite, name, width, height, scale);
   ENROLL_COMPONENT(Curative, hp);
   ENROLL_COMPONENT(LightSource, strength, radius);