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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。
Three-dimensional geological model is an effective carrier of geological structure, composition, structure and geological data in the three-dimensional visualization space. However, the geologic slice based on vector-cut technique can directly extract the virtual geologic cross-sections that are criss-crossed vertically from the three-dimensional geological body model to visually show the stratum structure and the spatial shape of the geological structure at a certain position underground. However, the isolated geological profile can not characterize the continuous change of geological structure, structure and geological phenomena. Therefore, a sequential profile visual analysis method based on real-time vector cropping is proposed. Using the real-time vector cutting technology based on multi-thread, the Boolean operations of geological structure, structure and attribute features of each virtual section are completed separately to generate the visualized geological slices with the characteristics of spatial topological structure and properties. Group of sequential profiles, the final realization of the structure of three-dimensional geological model for continuous and dynamic display. The control of parameters such as scanning direction, thread and frame number through the customized interface has good flexibility, controllability and automation, realizes the dynamic scanning of the real-time and multi-angle sequential profiles of the 3D geological model, Visualization of geological space is more intuitive, efficient and flexible.