基于实时矢量剪切的三维地质体模型序贯剖面可视分析方法  

A visual analysis method of 3D geological models by sequential sections based on real-time vector shear

作　　者：陈麒玉[1,2] 刘刚[1,2] 李新川[1,2] 吴冲龙[1] 唐丙寅[3] 

机构地区：[1]中国地质大学(武汉)计算机学院,湖北武汉430074 [2]中国地质大学(武汉)智能地学信息处理湖北省重点实验室,湖北武汉430074 [3]南阳理工学院软件学院,河南南阳473004

出　　处：《岩土力学》2017年第5期1365-1372,共8页Rock and Soil Mechanics

基　　金：国家高技术研究发展计划(863计划)(No.2012AA121401);国家自然科学基金面上项目(No.41172300);武警黄金地质研究所合作项目(WJHY2016-03)~~

摘　　要：三维地质模型是地质结构、成分、构造和地质数据在三维可视化空间的有效载体。而基于矢量剪切技术的地质切片,可以直接从三维地质体模型上快速提取纵横交错的虚拟地质剖面,直观地显示地下某一位置的地层结构及地质构造的空间形态。但孤立的地质剖面不能很好地表征地质结构、构造及地质现象的空间连续变化。为此,提出了一种基于实时矢量剪切的三维地质体模型的序贯剖面可视分析方法。运用基于多线程的实时矢量剪切技术,分别完成每个虚拟剖面的地质结构、构造和属性特征的布尔运算,生成具有空间拓扑结构和属性特征的可视化地质切片;依次生成整个地质体模型的多组序贯剖面,最终实现对三维地质模型的结构进行连续、动态显示。通过定制界面进行扫描方向、线程、剖面帧数等参数的控制,具有很好的灵活性、可控性和自动化程度,实现了对三维地质模型的实时、多角度序贯剖面的动态扫描,使得地质空间可视化分析更加直观、高效、灵活。The three-dimensional （3D） structural model is a good way to represent the spatial morphology of geological entity, and is an effective carrier of geological structures, compositions, tectonics, and geological data in a 3D visualization space. Geological slices based on the Boolean operation （vector shear） can be used to extract crisscross virtual geological sections directly from a 3D geological model, which intuitively shows the spatial morphology of the stratigraphic structure and geological tectonics at a certain location. However, isolated geological sections cannot properly characterize spatial continuous changes of a geological structure, tectonics and phenomena. Therefore, we propose a visual analysis method of 3D geological models based on sequential sections. Corresponding to each scanning direction, the Boolean operation of geological structures, tectonics and attributive characters on each virtual section is implemented by using a multithreading-based real-time vector shearing technology. Thus the visualized geological sections which contain spatial topological structures and attributive characters are obtained. Multi-group sequential sections are successively generated, and the continuous and dynamic display of 3D geological models is performed by means of sequential sections eventually. This method possesses high flexibility, controllability and automaticity since the scanning direction, threads, section frames and other parameters can be controlled through a custom interface. Therefore, real-time and multi-angle dynamic scanning of 3D geological models can be achieved using the sequential sections as well as more intuitive, efficient and flexible visual analyses of geological space are implemented.

关 键 词：三维地质体模型 矢量剪切 序贯剖面 多线程 动态扫描 

分 类 号：P554[天文地球—构造地质学]