摘要
针对大地形数据量庞大的特点,建立了地形多分辨率四叉树模型,对该模型的定义及构成进行了阐述,构建了该模型的存储机制,为大数据文件加索引文件的形式,采用该存储机制,可快速读取到需求数据,并设计了数据并行多线程调度机制,采用共享内存同步策略,确保了信息处理高效、有序的执行。最后采用了OSG开源引擎对上述策略进行了实现,工作步骤包括DEM、纹理数据准备及并行调度的程序实现。
In the field of 3D terrain visualization,the contradiction between massive terrain data volume and the rendering efficiency is increasingly outstanding,and much scheduling arithmetic of large terrain has been put forward.The improved four forks model was built according to characteristic of the large terrain data volume,the storage mechanism and index structure were discussed,the multithreading scheduling mechanism was constructed,and the large terrain rendering was achieved using OSG.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2013年第S1期282-285,296,共5页
Journal of System Simulation
关键词
多线程
多分辨率
四叉树
大地形
OSG
multithreading
multiresolution
four forks tree model
large terrain
OSG
