feat(脚本引擎): 添加SquirrelVM运行功能并重构主脚本

为SquirrelVM添加run()方法用于执行脚本中的main函数
重构main.nut脚本结构，将打印和错误调用封装到main函数中
在Application启动时自动执行脚本的main函数

Frostbite2D/include/frostbite2D/script/squirrel_vm.h

@@ -25,9 +25,11 @@ public:
   bool init();
   void shutdown();
   void loadScript();
+  void run();
 
   HSQUIRRELVM getVM() const { return vm_; }
   bool isValid() const { return vm_ != nullptr; }
+  bool isInitialized() const { return initialized_; }
 
 private:
   SquirrelVM() = default;

Frostbite2D/src/frostbite2D/core/application.cpp

@@ -18,6 +18,7 @@
 #include <frostbite2D/platform/windows.h>
 #include <frostbite2D/resource/asset.h>
 #include <frostbite2D/resource/npk_archive.h>
+#include <frostbite2D/script/squirrel_vm.h>
 #include <frostbite2D/resource/pvf_archive.h>
 #include <frostbite2D/resource/sound_pack_archive.h>
 #include <frostbite2D/scene/scene.h>
@@ -191,7 +192,7 @@ void Application::run() {
     return;
   }
 
-  SDL_Log("Starting application...");
+
   running_ = true;
   shouldQuit_ = false;
   paused_ = false;
@@ -203,6 +204,10 @@ void Application::run() {
   fpsTimer_ = 0.0f;
   currentFps_ = 0;
 
+  if (SquirrelVM::get().isInitialized()) {
+    SquirrelVM::get().run();
+  }
+
   mainLoop();
 
   running_ = false;

Frostbite2D/src/frostbite2D/script/squirrel_vm.cpp

@@ -76,6 +76,28 @@ void SquirrelVM::loadScript() {
   }
 }
 
+void SquirrelVM::run() {
+  if (!initialized_ || !vm_) {
+    return;
+  }
+
+  sq_pushroottable(vm_);
+  sq_pushstring(vm_, "main", -1);
+
+  if (SQ_SUCCEEDED(sq_get(vm_, -2))) {
+    sq_pushroottable(vm_);
+
+    if (SQ_FAILED(sq_call(vm_, 1, SQFalse, SQTrue))) {
+      SDL_LogError(SDL_LOG_CATEGORY_ERROR,
+                   "[Squirrel] Failed to call main function");
+    }
+
+    sq_pop(vm_, 2);
+  } else {
+    sq_pop(vm_, 1);
+  }
+}
+
 bool SquirrelVM::loadScriptFile(const std::string &path) {
   Asset &asset = Asset::get();
   std::optional<std::string> content = asset.readFileToString(path);

Game/assets/scripts/main.nut

@@ -1,2 +1,8 @@
-print("中文测试!")
+
-error("中文测试错误!")
+
+
+function main()
+{
+    print("中文测试!")
+    error("中文测试错误!")
+}