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所有在线课程反馈必须在4月12日星期五下午5点前提交3议程PC市场的变化超极本的特点和给游戏开发者的机会直观游戏玩法的编程优化性能和电池寿命游戏案例研究本课程演示文稿(PDF)发布在技术课程目录网站:intel.
com/go/idfsessionsBJ该网址同时打印于会议指南中专题讲座日程页的上方4议程PC市场的变化超极本的特点和给游戏开发者的机会直观游戏玩法的编程优化性能和电池寿命游戏案例研究5PC市场的变化最终用户对PC的要求不断提升超极本革命–重新发明PC–代表PC市场的趋势–重新定义PC使用模式PC使用模式正在发生重大变革"Ultrabooksareclearlythefutureoflaptops.
"(July2012)6议程PC市场的变化超极本的特点和给游戏开发者的机会直观游戏玩法的编程优化性能和电池寿命游戏案例研究7超极本的特点和给游戏开发者的机会直观的输入触控传感器感知摄像头优异的性能酷睿处理器dx11图形便携的外形超薄超轻可变形可拆卸在超极本上差异化您的游戏PC游戏开发者移动游戏开发者逼真的3D直观的游戏玩法8议程PC市场的变化超极本的特点和给游戏开发者的机会直观游戏玩法的编程优化性能和电池寿命游戏案例研究9编程选择比较Windows*8商店和桌面(Windows7兼容)WindowsKernelServices新的WinRT应用程序接口及应用模型完整的移动应用功能跨x86和ARM触控和传感器支持兼容遗留的库和工具底层可定制和优化10Windows*中的触控支持通过触控设备和操作系统启用–Windows*7支持多点触控–Windows8带来更多增强的触控支持触控手势–操作系统内建对缺省手势的处理–通过Windows触控应用程序接口进行定制旋转滑动缩放双指扣按与扣11桌面应用的Windows*触控应用程序接口WM_POINTERWM_GESTUREWM_TOUCH兼容性仅Windows*8Windows7/8Windows7/8手势集丰富有限触控点的原始数据易于编程性容易容易复杂注意:WM_TOUCH和WM_GESTURE是互斥的12通过消息机制获得触控数据在WndProc函数中处理触控消息–WM_TOUCHRegisterTouchWindow()GetTouchInput()–WM_GESTUREGetGestureInfo()DefWindowProc()–WM_POINTERGetPointerInfo()应用窗口消息Windows*OS输入数据多点触控硬件13Windows*8潜在支持的传感器物理传感器传感器融合Windows*SensorFramework中的逻辑传感器加速计陀螺仪(回转仪)环境光感应器指南针(磁力计)全球定位系统倾角仪加速计陀螺仪(回转仪环境光感应器指南针(磁力计)全球定位系统定向仪14Windows*桌面应用的传感器和位置应用程序接口传感器应用程序接口(COM接口)传感器应用位置应用位置应用程序接口ISensorEventsISensorManagerEventsISensorManagerISensorCollectionISensorISensorDataReport15通过事件机制获得传感器数据传感器传感器数据报告传感器应用传感器事件获得传感器数据设置注册通知获取更新16什么是感知计算超越使用键盘和鼠标的交互性…通过PC"感知"您意图的方式与您的PC进行交互…脸部跟踪近距跟踪语音识别手指跟踪姿态二维、三维对象跟踪手势手部跟踪17免费下载:intel.
com/software/perceptual为基于第二和第三代英特尔酷睿处理器的应用提供感知计算的交互性唯一的限制是您和您的想象力Intel感知计算SDK18议程PC市场的变化超极本的特点和给游戏开发者的机会直观游戏玩法的编程优化性能和电池寿命游戏案例研究19第三代英特尔酷睿处理器22纳米技术–改进性能瓦特比内置图形芯片–更好的3D性能–DirectX*11,ShaderModel5.
0–共享视频内存(最大1.
7GB)Turboboost–CPU和图形芯片支持动态频率支持更快更好的3D游戏20广泛的3D游戏在英特尔内置的高清显卡上可玩020406080第二代英特尔酷睿中等游戏配置@1366x7681366x768是在Steam硬件调查中第二种最常见的分辨率主要发布的游戏2011-12SourceIntel:IntelCorei7-2820QM,HD3000,Win7-64http://www.
intel.
com/support/graphics/intelhdgraphics3000_2000/sb/CS-032052.
htmhttp://store.
steampowered.
com/hwsurvey/,July2012为主流处理器的图形芯片进行优化21开盒即用体验开盒即用体验很重要–为玩家自动设置合适的游戏配置–需要正确检测显卡某些显卡检测方法的问题–使用独立显存决定选项显存并不总是代表性能,在处理器图形芯片上尤其具有误导性–使用着色模型决定选项系统支持某个特性并不意味着总能以好的性能运行该特性22推荐的显卡检测方法检测供应商和设备IDs并映射到游戏配置–对未知性能的设备使用遗留方法GPUDetect例程显示了检测英特尔显卡特性的最佳方式–供应商ID,设备ID–视频内存–供应商专门的API扩展http://software.
intel.
com/en-us/articles/vcsource-samples-gpu-detect/23英特尔处理器图形上的游戏优化技巧批处理图元–每帧小于2000个绘制调用最小化渲染状态改变–按材质排序,实例化等移除不必要的clear调用最大化Early-Z的效率–首先绘制不透明覆盖物,如工具面板–适用于像素覆盖严重的效果–避免像素着色器中写Z值24游戏优化技巧(继续)最小化带宽–减少每个着色器的纹理采用数量(如,在地表、阴影模糊、抗锯齿的渲染趟中)–减少渲染目标读回(如,在光晕特效中)根据性能调整质量–简化全屏后处理特效中的多趟技术(如,光晕特效)–先绘制到更小的渲染目标,然后拉伸到视尺寸(如,在密集的粒子特效中)http://software.
intel.
com/en-us/articles/intel-graphics-developers-guides/25电池寿命优化技巧优化性能热点–减少硬件资源使用率避免忙等轮询–GPU事件/阻塞查询限制帧速率–事件驱动对睡眠等待构造上下文感知–尽可能最小化工作量和帧速率26高功效的限帧算法voidInitGame(){hTimer=CreateWaitableTimer(NULL,FALSE,//auto-resettimerNULL);SetWaitableTimerEx(hTimer,dueTime,20,//periodictimerduration(20ms,i.
e.
50fps)NULL,NULL,NULL,32);//tolerabledelay}voidGameMainloop(){WaitForSingleObject(hTimer,INFINITE);//synctotimertickevent//moveandthenrenderframe}voidCleanGame(){CancelWaitableTimer(hTimer);}27为上下文感知编程注册功耗设置通知当上下文改变时处理Windows消息为省电改变应用状态LRESULTWINAPIMsgProc(…){switch(msg){caseWM_ACTIVATEAPP://notifythewindowfocuschanges(e.
g.
activetoinactive)caseWM_SIZE://notifythewindowsizechanges(e.
g.
normaltominimized)caseWM_POWERBROADCAST://notifythepowersettingchanges(e.
g.
ACtoDC)}}//RegistergamewindowforchangenotificationsonpowersettingsVoidOnInit(){//registerAC/DCswitchnotificationhACDCSource=RegisterPowerSettingNotification(appWnd,&GUID_ACDC_POWER_SOURCE,DEVICE_NOTIFY_WINDOW_HANDLE);}VoidOnDestroy(){if(hACDCSource!
=NULL)UnregisterPowerSettingNotification(hACDCSource);}28IntelGPAforWindows*概览适用于游戏性能和功耗调优平台分析器在同一时间轴上显示多核处理器和显卡上的任务的运行状态.
帧分析器帧分析深入到绘制调用层面,包括着色器、纹理、D3D状态、像素历史等系统分析器和仪表盘通过图形和功耗性能指标以及状态覆盖进行实时的、游戏内的分析IntelGraphicsPerformanceAnalyzer(IntelGPA)29议程PC市场的变化超极本的特点和给游戏开发者的机会直观游戏玩法的编程优化性能和电池寿命游戏案例研究30炫舞吧:亲密接触3D音乐舞蹈类游戏–基于Gamebryo*引擎直观的游戏玩法–使用Windows*8桌面触控应用程序接口–多点触控或键盘可转换的游戏模式为超极本优化–提升44%的性能–延长+28%的电池上的游戏时间31演示同样可到展示区体验该游戏32总结PC使用模式正在发生重大变革超极本给游戏开发者带来差异化的机会通过触控、传感器、感知摄像头实现直观的游戏玩法主流处理器图形芯片有助于逼真的3D游戏体验对游戏的开盒即用性能和电池寿命进行优化33LegalDisclaimerINFORMATIONINTHISDOCUMENTISPROVIDEDINCONNECTIONWITHINTELPRODUCTS.
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Rev.
1/17/13
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