https://en.wikipedia.org/wiki/.MDX
http://www.manew.com/thread-25148-1-1.html
http://world-editor-tutorials.thehelper.net/filestools.php
https://www.turbosquid.com/gmax
War3模型导出
原文：http://www.cnblogs.com/lilei9110/p/6366515.html
