feat(gameplay): detect underwater state and play transition/bubble sounds

- Add is_underwater() and set_underwater() to ClientPlayer.
- Change get_world() to return non-const reference for audio access.
- Update Camera::update_move_camera() to detect water block changes and trigger transition sound.
- Add repeating timer in ClientWorld to play random bubble ambient sounds while underwater.
- Include new ambient sound assets for water transitions and bubbles.
- Also add sand walk sound asset (unused in this commit).

include/Cubed/gameplay/client_player.hpp

@@ -55,7 +55,7 @@ public:
     void set_gait(Gait gait);
     GameMode& game_mode();
 
-    const ClientWorld& get_world() const;
+    ClientWorld& get_world();
 
     void set_uuid(std::string_view uuid);
     std::string get_uuid() const;
@@ -70,6 +70,8 @@ public:
     bool ray_cast(const glm::vec3& start, const glm::vec3& dir,
                   glm::ivec3& block_pos, glm::vec3& normal,
                   float distance = 4.0f);
+    bool is_underwater() const;
+    void set_underwater(bool u);
 
 private:
     using enum GameMode;
@@ -100,6 +102,7 @@ private:
 
     bool m_moving = false;
     bool m_sprinting = false;
+    bool m_underwater = false;
 
     glm::vec3 direction = glm::vec3(0.0f, 0.0f, 0.0f);
     glm::vec3 move_distance{0.0f, 0.0f, 0.0f};

src/camera.cpp

@@ -40,10 +40,17 @@ void Camera::update_move_camera() {
     }
     glm::ivec3 block_pos = glm::floor(m_camera_pos);
     auto& world = m_player->get_world();
+    bool change;
     if (world.get_block_tpye(block_pos) == 7) {
-        m_under_water = true;
+        change = true;
     } else {
-        m_under_water = false;
+        change = false;
+    }
+    if (m_under_water != change) {
+        m_under_water = change;
+        m_player->set_underwater(m_under_water);
+        m_player->get_world().get_audio().play_2d(
+            "ambient/water/in_and_out_of_water.flac", true);
     }
 }
 

src/gameplay/client_player.cpp

@@ -580,7 +580,7 @@ float& ClientPlayer::fly_y_speed() { return m_fly_y_speed; }
 unsigned ClientPlayer::place_block() const { return m_place_block; };
 void ClientPlayer::set_gait(Gait gait) { m_gait = gait; }
 GameMode& ClientPlayer::game_mode() { return m_game_mode; }
-const ClientWorld& ClientPlayer::get_world() const { return m_world; }
+ClientWorld& ClientPlayer::get_world() { return m_world; }
 
 void ClientPlayer::set_uuid(std::string_view uuid) {
     std::lock_guard lock(m_uuid_mutex);
@@ -615,6 +615,9 @@ void ClientPlayer::init(std::string_view name) {
     });
 }
 
+bool ClientPlayer::is_underwater() const { return m_underwater; }
+void ClientPlayer::set_underwater(bool u) { m_underwater = u; }
+
 float ClientPlayer::yaw() const { return m_yaw; }
 float ClientPlayer::pitch() const { return m_pitch; }
 float& ClientPlayer::angle() { return m_angle; }

src/gameplay/client_world.cpp

@@ -398,6 +398,15 @@ void ClientWorld::init(std::string_view player_name,
         }
     });
 
+    m_timers.try_emplace("under water bubble", 1.0f, [this]() {
+        if (m_player.is_underwater()) {
+            auto ans = m_random.random_int(1, 2);
+            std::string sound =
+                "ambient/water/bubble00" + std::to_string(ans) + ".ogg";
+            m_audio.play_2d(sound, true);
+        }
+    });
+
     LoginReq req;
     req.set_name(m_player.get_name());
     while (!client->is_connected()) {