Cocos2d-x 使用Lua开发基础

Coos2d-x网站:http://www.cocos2d-x.org/

 Windows下开发，所以下载源码解压后先用build-win32.bat编译可执行文件，编译完后在HelloLua或者multi-platform-lua工程中修改一下C++源代码，不改也可以。

main.c:

int APIENTRY _tWinMain(HINSTANCE hInstance,
                       HINSTANCE hPrevInstance,
                       LPTSTR    lpCmdLine,
                       int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

#ifdef USE_WIN32_CONSOLE
    AllocConsole();
    freopen("CONIN$", "r", stdin);
    freopen("CONOUT$", "w", stdout);
    freopen("CONOUT$", "w", stderr);
#endif

    // create the application instance
    AppDelegate app;

	CCUserDefault* userDefault = CCUserDefault::sharedUserDefault();	//用于从XML文件读取用户配置
	std::string viewName = userDefault->getStringForKey("viewName", "WinApp");
	float viewWidth = userDefault->getFloatForKey("viewWidth", 480);
	float viewHeight = userDefault->getFloatForKey("viewHeight", 320);
	float zoomFactor = userDefault->getFloatForKey("zoomFactor", 1);

    CCEGLView* eglView = CCEGLView::sharedOpenGLView();
    eglView->setViewName(viewName.c_str());
    eglView->setFrameSize(viewWidth, viewHeight);
	eglView->setFrameZoomFactor(zoomFactor);

    int ret = CCApplication::sharedApplication()->run();

#ifdef USE_WIN32_CONSOLE
    FreeConsole();
#endif

    return ret;
}

 修改了一些地方，将一些配置从xml文件中读取，免得以后对要他们修改还要重新编译：

CCUserDefault* userDefault = CCUserDefault::sharedUserDefault();	//用于从XML文件读取用户配置
	std::string viewName = userDefault->getStringForKey("viewName", "WinApp");
	float viewWidth = userDefault->getFloatForKey("viewWidth", 480);
	float viewHeight = userDefault->getFloatForKey("viewHeight", 320);
	float zoomFactor = userDefault->getFloatForKey("zoomFactor", 1);

    CCEGLView* eglView = CCEGLView::sharedOpenGLView();
    eglView->setViewName(viewName.c_str());
    eglView->setFrameSize(viewWidth, viewHeight);
	eglView->setFrameZoomFactor(zoomFactor);

CCUserDefault会利用tinyxml2读写xml文件，从而保存或者读取我们所需要的基本类型数据。

这样也避免了转码操作。

在AppDelegate初始化时加载Lua文件，主要就改了一下路径：

std::string searchPath = _userDefault->getStringForKey("searchPath", "script");
	std::string scriptName = _userDefault->getStringForKey("scriptName", "main.lua");
    //std::string path = CCFileUtils::sharedFileUtils()->fullPathForFilename("hello.lua");
	CCFileUtils::sharedFileUtils()->addSearchPath(searchPath.c_str());
    pEngine->executeScriptFile(scriptName.c_str());

 这样启动时就去执行script/main.lua

编译后就不用管C++代码了，以后的lua代码修改后也不用再编译。

现在有了可执行文件，拷到没装VisualStudio的PC上也可以开发cocos了

 下面写lua代码:

local function main()
  -- avoid memory leak
  collectgarbage("setpause", 100)
  collectgarbage("setstepmul", 5000)
  print(os.date())  --打印系统时间
  
  local scene = CCScene:create()
  local layer = CCLayer:create()
  layer:setTouchEnabled(true)
  layer:registerScriptTouchHandler(function(eventType, x, y)  --响应屏幕触摸事件
    if eventType == "began" then
      print(eventType, x, y)
      return true
    elseif eventType == "ended" then
      print(eventType, x, y)
    end
  end)
  
  scene:addChild(layer)
  CCDirector:sharedDirector():setDisplayStats(true);
  CCDirector:sharedDirector():runWithScene(scene)
end

main()

 debug程序通过print打印

 参照LuaTest代码写一个小电子时钟程序

local function main()
  -- avoid memory leak
  collectgarbage("setpause", 100)
  collectgarbage("setstepmul", 5000)
  
  --获取定时任务队列
  local scheduler = CCDirector:sharedDirector():getScheduler()
  --获取屏幕尺寸
  local winSize = CCDirector:sharedDirector():getWinSize()
  --创建layer
  local layer = CCLayer:create()
  
  --获取位图字体
  local bmpFontTime = CCLabelBMFont:create(os.date('%X'), "bitmapFontTest3.fnt")
  local bmpFontDate = CCLabelBMFont:create(os.date('%x'), "bitmapFontTest3.fnt")
  local bmpFontFast = CCLabelBMFont:create('0', "bitmapFontTest3.fnt")
  --设置坐标
  bmpFontTime:setPosition(winSize.width / 2, winSize.height / 2)
  bmpFontDate:setPosition(winSize.width / 2, winSize.height / 2 + 48)
  bmpFontFast:setPosition(winSize.width / 2, winSize.height / 2 - 48)
  --添加到layer   
  layer:addChild(bmpFontTime)
  layer:addChild(bmpFontDate)
  layer:addChild(bmpFontFast)
  
  --定时器响应函数
  local function secondInterval(dt)
    print(dt, os.date('%X'))
    bmpFontTime:setString(os.date('%X'))
    bmpFontDate:setString(os.date('%x'))
  end
  
  --定时器响应函数
  local interval = 0
  local function fastInterval(dt)
    interval = interval+1
    print(interval)
    bmpFontFast:setString(interval)
  end

  --设置定时任务
  local schedulerEntry1 = nil
  local schedulerEntry2 = nil
  layer:registerScriptHandler(function(event)
    if event == "enter" then
      print('schedule enter')
      schedulerEntry1 = scheduler:scheduleScriptFunc(secondInterval, 1.0, false)
      schedulerEntry2 = scheduler:scheduleScriptFunc(fastInterval, 0.1, false)
    elseif event== "exit" then
      print('schedule exit')
      scheduler:unscheduleScriptEntry(schedulerEntry1)
      scheduler:unscheduleScriptEntry(schedulerEntry2)
      if CCDirector:sharedDirector():isPaused() then
          CCDirector:sharedDirector():resume()
      end
    end
  end)
  
  --响应屏幕触摸事件
  layer:setTouchEnabled(true)
  layer:registerScriptTouchHandler(function(eventType, x, y)
    if eventType == "began" then
      print(eventType, x, y)
      return true
    elseif eventType == "ended" then
      print(eventType, x, y)
      CCDirector:sharedDirector():setDisplayStats(not CCDirector:sharedDirector():isDisplayStats());
    end
  end)
  
  local scene = CCScene:create()
  scene:addChild(layer)
  CCDirector:sharedDirector():runWithScene(scene)
end

main()

 

 

 新手。