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4 在cocos2d-x应用启动以后会创建一个opengl窗口用来实现图形绘制和事件处理 draw()???? 该方法绘制每一个node update() 该方法处理每一帧的逻辑变化 ccTouchesBegan() 处理用户的交互事件 当cocos2d-x 应用启动以后会执行 CCApplication::sharedApplication()->

run();

我们看下具体代码: int CCApplication::run(PVRFrameEnableControlWindow(false);

??? // Main message loop:???? MSG msg;

???? LARGE_INTEGER nFreq;

???? LARGE_INTEGER nLast;

???? LARGE_INTEGER nNow;

??? QueryPerformanceFrequency(&

nFreq);

???? QueryPerformanceCounter(&

nLast);

??? // Initialize instance and cocos2d.???? if (!applicationDidFinishLaunching(return 0;

???? } ??? CCEGLView* pMainWnd = CCEGLView::sharedOpenGLView();

???? pMainWnd->

centerWindow();

???? ShowWindow(pMainWnd->

getHWnd(), SW_SHOW);

??? while (1)if (! PeekMessage(&

msg, NULL, 0, 0, PM_REMOVE)Get current time tick.QueryPerformanceCounter(&

nNow);

If it'

s the time to draw next frame, draw it, else sleep a while.if (nNow.QuadPart - nLast.QuadPart >

m_nAnimationInterval.QuadPart)nLast.QuadPart = nNow.QuadPart;

CCDirector::sharedDirector()->

mainLoop(else?Sleep(0)continue;

??????? if (WM_QUIT == msg.message)Quit message loop.break;

Deal with windows message.if (! m_hAccelTable || ! TranslateAccelerator(msg.hwnd, m_hAccelTable, &

msg)TranslateMessage(&

msg)DispatchMessage(&

msg) ??? return (int) msg.wParam;

?} CCDirector::sharedDirector()->

mainLoop();

?我们看到CCDirect实现了应用的主循环,我们看下循环中做的工作是什么 void CCDisplayLinkDirector::mainLoop(void)?{???? if (m_bPurgeDirecotorInNextLoop)m_bPurgeDirecotorInNextLoop = false;

purgeDirecto........