这个好像是官方放出的一个示例项目文件，蛮早就见到了，基本的角色控制，视角为第三人称，动作都是相当协调的，可以做你自己的角色游戏了。

初始项目文件在附件中
My original version of doing movement was a pretty sloppy hacked version. I provided the source, but it was almost impossible to really figure out what was going on. I didn’t really know what was happening, but felt good because it worked. I went back and really cut down all the code to the minimum and explained it with a lot more comments. This post explains some of the basic elements to get that 3rd person character moving and rotating.