集群环境下基于视点移动的三维城市模型快速显示方法
发布时间：2018-09-14 12:23
【摘要】：大范围三维城市模型数据在现有的单机运行环境下,因数据量大导致运行速度慢、计算耗时等难题。为解决该问题,本文结合集群并行运算,提出了一种基于视点移动规则的大范围三维城市模型的快速显示方法。采用静态细节层次简化算法将三维城市模型简化为4个分辨率层次,根据视点移动规律,利用距离和偏心率选择不同层次的细节层次模型,逐级加载不同分辨率层次模型,并在集群系统中并行显示,从而有效地解决了大范围三维城市模型加载显示过慢、场景效果跳跃等问题,实现了对大范围三维城市模型的快速可视化。试验结果表明:随视点变化分层逐级加载不同等级LOD模型,采用PC集群并行绘制,可以快速有效地对大范围三维城市模型进行渲染处理,在兼顾效率的同时,并行地显示模型的细节,具有良好的可视化效果,对智慧城市的建设具有重要的指导意义。
[Abstract]:Large scale 3D urban model data in the existing single machine running environment, because of the large amount of data resulting in slow running speed, calculation time and other difficult problems. In order to solve this problem, this paper presents a fast display method of large scale 3D city model based on view moving rules. The static detail level simplification algorithm is used to simplify the 3D urban model into four resolution levels. According to the moving rule of view, the detail level models of different levels are selected by using distance and eccentricity, and the hierarchical models with different resolutions are loaded step by step. The parallel display in cluster system can effectively solve the problems of slow loading and display of large-scale 3D urban model and jump of scene effect, and realize the fast visualization of large-scale 3D urban model. The experimental results show that the LOD models of different levels are loaded step by step with the view point change, and the PC cluster is used to render the 3D urban models quickly and effectively, and the efficiency is also taken into account. Showing the details of the model in parallel has good visualization effect and has important guiding significance for the construction of intelligent city.
【作者单位】： 湖南科技大学地理空间信息技术国家地方联合工程实验室;湖南科技大学地理空间信息湖南省工程实验室;
【基金】：国家自然科学基金(41271390) 湖南省研究生创新基金(CX2016B541) 湖南省重点实验室开放基金项目(JL16K01;CT16K02) 湖南省教育厅重点项目(16A070)
【分类号】：P208
本文编号：2242701
[Abstract]:Large scale 3D urban model data in the existing single machine running environment, because of the large amount of data resulting in slow running speed, calculation time and other difficult problems. In order to solve this problem, this paper presents a fast display method of large scale 3D city model based on view moving rules. The static detail level simplification algorithm is used to simplify the 3D urban model into four resolution levels. According to the moving rule of view, the detail level models of different levels are selected by using distance and eccentricity, and the hierarchical models with different resolutions are loaded step by step. The parallel display in cluster system can effectively solve the problems of slow loading and display of large-scale 3D urban model and jump of scene effect, and realize the fast visualization of large-scale 3D urban model. The experimental results show that the LOD models of different levels are loaded step by step with the view point change, and the PC cluster is used to render the 3D urban models quickly and effectively, and the efficiency is also taken into account. Showing the details of the model in parallel has good visualization effect and has important guiding significance for the construction of intelligent city.
【作者单位】： 湖南科技大学地理空间信息技术国家地方联合工程实验室;湖南科技大学地理空间信息湖南省工程实验室;
【基金】：国家自然科学基金(41271390) 湖南省研究生创新基金(CX2016B541) 湖南省重点实验室开放基金项目(JL16K01;CT16K02) 湖南省教育厅重点项目(16A070)
【分类号】：P208
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1 张季一;基于几何代数的三维地籍空间数据模型研究[D];中国矿业大学;2016年
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