基于WebGL的三维模型组织与发布关键技术

Key Technologies of Organization and Management of 3D Model Based on WebGL

随着互联网技术的快速发展,Web模式下实现三维场景的浏览是WebGIS发展的一个重要方向。本文采用WebGL技术,提出了WebGL下三维建筑物模型组织与管理的方法,结合LoD(levels of detail)思想以及建筑物模型的特征,提出了半边折叠的方法来简化建筑物模型的几何数据,提出了WebGL下建筑物模型的快速调度算法,实现了海量模型环境下三维场景的漫游、缩放、查询等功能。

With the rapid development of Internet technology,the realization of 3 D scene browsing in Web mode is an important direction of WebGIS development.In this paper,the method of organization and management of 3 D building model under WebGL is proposed.A half side folding method which combines LoD(levels of detail)thought and the characteristics of building model is proposed to simplify the geometric data of building model.Meanwhile the scheduling algorithm of building model under WebGL is proposed,which realizes the functions of roaming,zooming and querying of 3 D scenes in massive model environment.