网上搜得用Away3D引擎写的汽车展示as3源码，经修改增加了键控换车型和换颜色功能，运行还算流畅，请予审查-Internet search engine starting Away3D as3 source code written in the car show, as amended, to increase the exchange of models and change the color keying feature, run fairly smoothly, please I r