From 43997cc8f4d3e8f5f812ea9629beef3fbf704a90 Mon Sep 17 00:00:00 2001
From: Ziyu <theorhythm@gmail.com>
Date: Sat, 21 Jun 2025 10:52:11 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E5=96=84=E6=A8=A1=E5=9D=97=E9=97=B4?=
 =?UTF-8?q?=E4=BE=9D=E8=B5=96?=
MIME-Version: 1.0
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---
 assets/config.json             |  2 +-
 src/engine/core/game_app.cpp   | 18 ++++++++++++++----
 src/engine/core/game_app.h     | 11 +++++++++++
 src/game/scene/title_scene.cpp |  4 ----
 src/main.cpp                   | 10 ++++++++++
 5 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/assets/config.json b/assets/config.json
index c9c6697..aad0e94 100644
--- a/assets/config.json
+++ b/assets/config.json
@@ -12,7 +12,7 @@
         "target_fps": 60
     },
     "audio": {
-        "music_volume": 0.5,
+        "music_volume": 0.2,
         "sound_volume": 0.5
     },
     "input_mappings": {
diff --git a/src/engine/core/game_app.cpp b/src/engine/core/game_app.cpp
index 7b2553f..97a95dd 100644
--- a/src/engine/core/game_app.cpp
+++ b/src/engine/core/game_app.cpp
@@ -11,7 +11,6 @@
 #include "../input/input_manager.h"
 #include "../physics/physics_engine.h"
 #include "../scene/scene_manager.h"
-#include "../../game/scene/title_scene.h"
 #include <SDL3/SDL.h>
 #include <spdlog/spdlog.h>
 
@@ -47,8 +46,18 @@ void GameApp::run() {
     close();
 }
 
+void GameApp::registerSceneSetup(std::function<void(engine::scene::SceneManager &)> func)
+{
+    scene_setup_func_ = std::move(func);
+    spdlog::trace("已注册场景设置函数。");
+}
+
 bool GameApp::init() {
     spdlog::trace("初始化 GameApp ...");
+    if (!scene_setup_func_) {
+        spdlog::error("未注册场景设置函数，无法初始化 GameApp。");
+        return false;
+    }
     if (!initConfig()) return false;
     if (!initSDL())  return false;
     if (!initTime()) return false;
@@ -64,9 +73,8 @@ bool GameApp::init() {
     if (!initContext()) return false;
     if (!initSceneManager()) return false;
 
-    // 创建第一个场景并压入栈
-    auto scene = std::make_unique<game::scene::TitleScene>(*context_, *scene_manager_);
-    scene_manager_->requestPushScene(std::move(scene));
+    // 调用场景设置函数 (创建第一个场景并压入栈)
+    scene_setup_func_(*scene_manager_);
 
     is_running_ = true;
     spdlog::trace("GameApp 初始化成功。");
@@ -191,6 +199,8 @@ bool GameApp::initAudioPlayer()
 {
     try {
         audio_player_ = std::make_unique<engine::audio::AudioPlayer>(resource_manager_.get());
+        audio_player_->setMusicVolume(config_->music_volume_);      // 设置背景音乐音量
+        audio_player_->setSoundVolume(config_->sound_volume_);      // 设置音效音量
     } catch (const std::exception& e) {
         spdlog::error("初始化音频播放器失败: {}", e.what());
         return false;
diff --git a/src/engine/core/game_app.h b/src/engine/core/game_app.h
index 11516e5..74493e3 100644
--- a/src/engine/core/game_app.h
+++ b/src/engine/core/game_app.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <memory>
+#include <functional>
 
 // 前向声明, 减少头文件的依赖，增加编译速度
 struct SDL_Window;
@@ -46,6 +47,9 @@ private:
     SDL_Renderer* sdl_renderer_ = nullptr;
     bool is_running_ = false;
 
+    /// @brief 游戏场景设置函数，用于在运行游戏前设置初始场景 (GameApp不再决定初始场景是什么)
+    std::function<void(engine::scene::SceneManager&)> scene_setup_func_;
+
     // 引擎组件
     std::unique_ptr<engine::core::Time> time_;
     std::unique_ptr<engine::resource::ResourceManager> resource_manager_;
@@ -69,6 +73,13 @@ public:
      */
     void run();
 
+    /**
+     * @brief 注册用于设置初始游戏场景的函数。
+     *        这个函数将在 SceneManager 初始化后被调用。
+     * @param func 一个接收 SceneManager 引用的函数对象。
+     */
+    void registerSceneSetup(std::function<void(engine::scene::SceneManager&)> func);
+
     // 禁止拷贝和移动
     GameApp(const GameApp&) = delete;
     GameApp& operator=(const GameApp&) = delete;
diff --git a/src/game/scene/title_scene.cpp b/src/game/scene/title_scene.cpp
index a52db53..6efe359 100644
--- a/src/game/scene/title_scene.cpp
+++ b/src/game/scene/title_scene.cpp
@@ -69,10 +69,6 @@ void TitleScene::createUI() {
         return;
     }
 
-    // 设置音量
-    context_.getAudioPlayer().setMusicVolume(0.2f);  // 设置背景音乐音量为20%
-    context_.getAudioPlayer().setSoundVolume(0.5f);  // 设置音效音量为50%
-
     // 设置背景音乐
     context_.getAudioPlayer().playMusic("assets/audio/platformer_level03_loop.ogg");
 
diff --git a/src/main.cpp b/src/main.cpp
index dacba1b..94cad99 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,10 +1,20 @@
 #include "engine/core/game_app.h"
+#include "engine/scene/scene_manager.h"
+#include "game/scene/title_scene.h"
 #include <spdlog/spdlog.h>
 
+void setupInitialScene(engine::scene::SceneManager& scene_manager) {
+    // GameApp在调用run方法之前，先创建并设置初始场景
+    auto title_scene = std::make_unique<game::scene::TitleScene>(scene_manager.getContext(), scene_manager);
+    scene_manager.requestPushScene(std::move(title_scene));
+}
+
+
 int main(int /* argc */, char* /* argv */[]) {
     spdlog::set_level(spdlog::level::off);
 
     engine::core::GameApp app;
+    app.registerSceneSetup(setupInitialScene);
     app.run();
     return 0;
 }
\ No newline at end of file