说明：  本例vrml代码需要专门的vrml浏览器浏览，本例代码是一般酒店，公司等场所的感应门，在建大型三维场景时可以直接链接此例插入场景，非常实用
(Vrml code in this case requires specialized vrml browser to browse this case, the code is the the general hotel companies and other establishments induction door, in the construction of large three-dimensional scene can link directly to this case, insert scene, very practical)