基于规则体元的三维地质模型构建加速技术研究  

3-Dimensional Geological Modeling Acceleration Technology Based on Regular Voxel

作　　者：卜晓励 张天羽 房昱纬 鄢文 汤华[2,3] 倪洪亮 BU Xiaoli;ZHANG Tianyu;FANG Yuwei;YAN Wen;TANG Hua;NI Hongliang(Yunnan Transportation Planning and Design Institute Co.,Ltd.,Kunming,Yunnan 650011,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]云南省交通规划设计研究院有限公司,云南昆明650011 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [3]中国科学院大学,北京100049

出　　处：《水利与建筑工程学报》2021年第5期14-18,104,共6页Journal of Water Resources and Architectural Engineering

摘　　要：基于规则体元的三维地质模型在地质空间数据处理、三维空间信息分析和操作的简便性和模型通用性上相较于其他模型构建方法都有很大的优势,但是基于规则体元方法的三维模型构建中对于描述精确度高,模型范围大的地质体,在数据存储空间占用、模型生成时间、模型显示帧率和显存占用上都有较大的影响。针对规则体元方法的三维模型构建的效率问题,提出一种地质模型构建加速技术,通过降采样LOD技术、模型压缩技术和多线程Paged LOD调度技术,较大提升了基于规则体元的三维地质模型的生成时间和显示帧率,并且极大减少数据存储空间和显存的占用。通过对不同地质大小的模型构建效率对比发现,使用加速技术后,可以满足对12800 m×12800 m×128 m大小的三维地质模型的分析需求。3-dimensional geological modeling based on regular voxel has considerable advantages in terms of geological spatial data processing,3-dimensional spatial information analysis,ease of operation and model versatility. However,3-dimensional modeling based on the regular voxel approach has problems of large data storage space,expensive time consumption of model generation,and low frame rate of model display and high VRAM usage when dealing with geological bodies with high characterization precision at large scale. A geological modelling acceleration technique is proposed to improve the efficiency of regular voxel-based 3 D modeling. Through down sampling LOD,model compression and multi-thread Paged LOD scheduling,this technique can achieve faster generation of regular voxel-based 3 D geological modelling with higher display frame rates with reduced data storage space and VRAM usage. A comparison of efficiency with different approaches to geological modeling at different scales reveals that the acceleration technology can meet the analytical requirements of 3-dimensional geological models with a size of 12 800 m × 12 800 m × 128 m.

关 键 词：规则体元 三维地质模型 模型渲染速度 降采样 

分 类 号：P208[天文地球—地图制图学与地理信息工程]