重大工程三维地层分析的功能设计与实现  

Function Design and Realization of 3D Stratum in the Development of Underground Space

作　　者：周翠英[1] 董立国[1] 陈恒[1] 尚伟[2] 

机构地区：[1]中山大学应用力学与工程系//地下工程与信息技术研究中心,广东广州510275 [2]广东省东深供水改造工程建设总指挥部,广东东莞510800

出　　处：《中山大学学报（自然科学版）》2006年第4期39-43,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(59809008);广东省科技攻关十五专项资助项目(2001B30903);广东省科技计划资助项目(2004B10101002);广东省东深供水改造工程建设总指挥部基金资助项目(DSGZ-KJ-042DSGZ-KJ-043)

摘　　要：三维地层分析在地下工程隐蔽环境研究和G IS系统中具有特殊重要的意义。探讨了利用开放图形库OpenGL实现三维地层分析的一种普遍适用的功能结构和设计,使之能在大多数地理信息系统中得到普遍应用,包括数据编辑、数据查询、地层构造、地层显示、移动控制、任意切割、场景渲染以及帮助等。在三维地层的构造中,首先建立数据库;然后采用OpenGL作为三维地层分析的图形开发工具,通过三角形、四边形或其它多边形构造二维或三维几何外表面,并将这些数据转换处理为象素,从而构成帧缓存中最终所期望的图像;最后在设定的屏幕区域内显示。在地层构造过程中,利用网格法与交线分割法实现了非组合切割、组合切割和任意开挖功能。因此,该设计提供三维地层建模、分析、切割等核心功能,并实现地层的平移、旋转、缩放等多种控制操作,从而以多方式、多角度地观察和了解地层范围内每一处的详细信息,并尽可能模拟现实世界,增强三维地层的真实感。最后,将该设计应用于东深供水改造工程的地下环境信息系统中,验证了其合理性和实用性。3D analysis of stratum has a special significance in the research of covered underground engineering environment and geography information system. A kind of universal functional structure and design in the realization of 3D-Stratum analysis is discussed with the help of OpenGL including data edit, data check, stratum construction, stratum showing, remove control, scene exaggerate and help module et. al. , so as to apply in most of GIS systems. In the construction of 3D-stratum, firstly, the database is constructed; and then, the 3D graphic standard- OpenGL is adapted as a developing tool of 3D-Stratum analysis that formed the outer surface of 2D or 3D graph or geometry body in the frame buffer memory by a mount of small triangles or quadrangles or other polygons. They and transit ted into picture element though by data processing. Finally, the expected image in frame buffer memory is displayed on a certain area of screen. Thus, realize the arbitrary cutting and excavation function; even more provide the modeling, analysis and cutting function; and removing, rotation, lessen or magnify et. al. controlling operation ; so as to find out the details of every location in the certain area of the stratum though by multi-way and simulate the practical world as actual as possible and increase the authenticity of 3D-Stratum. At last, by applying to the Water Supply Reconstruction Project from Dongjiang to Shenzhen, Guangdong Province, this design improves the reasonableness and practicability of the results.

关 键 词：重大工程 三维地层 功能设计与实现 工程应用 

分 类 号：TU91[建筑科学—建筑理论]