使用ThreeJs搭建BIM模型浏览器，第一步-显示

threejs既然能够通过三角面构造mesh,肯定是能够通过面片构造出几何模型。各个功能模块的核心代码，在我后续的博客中会一一列举公布出来。

实现思路：

1、从Revit中导出族名称+构件三角面+构件属性的JSON文本,并压缩成Zip。有朋友问是否需要二次开发。当然是要的，具体可以查看我发布的其他文章，有公开的Demo。

2、Web端解压ZIP，并加载JSON。整个打包解压过程自己定义，不采用第三方文件的优势是，解析过程可以优化，内容也可以根据模型的精细级别进行优化。

以下是文件定义举例。大家在实现的时候根据自己需求去定义，不用刻意模仿。JSON中重复的字段，名称取短一点对文件压缩有很大提升。比如Face直接命名为："F",自己定义就不太需要考虑可读性。

我的作品，几乎能做到市面上浏览器的所有常见功能。例如漫游、点选、框选、显示隐藏、透明度、标注、测量。下面是模型的展示入口：模型展示页，从里面也可以下载到一些入门级的Revit插件代码和Threejs的示例代码。

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