基于OSG的地形多分辨率四叉树模型  

Terrain Multi-resolution Four Forks Tree Model Based on OSG

作　　者：吴东亚[1] 邵伟[2] 黄玺瑛[2] 夏永春[2] 

机构地区：[1]装甲兵工程学院科研部,北京100072 [2]装甲兵工程学院装备指挥与管理系,北京100072

出　　处：《装甲兵工程学院学报》2013年第1期77-81,共5页Journal of Academy of Armored Force Engineering

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,构建了该模型的存储结构,即采用大数据文件加索引文件的形式进行存储,采用该存储结构可快速读取到需求数据,并阐述了数字高程模型(Digital Ele-vation Model,DEM)数据和纹理数据的存储步骤;设计了数据的并行多线程调度机制,该调度机制采用共享内存策略实现同步,确保了信息处理高效、有序地执行。结果表明:该模型在OSG中能够按需快速加载地形数据,实现高效渲染。In allusion to the feature of massive terrain data volume,the multi-resolution four forks tree model for the large terrain is built,and the storage structure of the model is constructed,that is,to store data by using big data and index file and by using the storage mechanism.The required data can be got quickly,the process of Digital Elevation Model(DEM) data and texture data are also discussed;the parallel multithreading scheduling mechanism is designed by using the shared memory strategy to achieve synchronization.The result shows that the terrain data can be quickly loaded by using the model in OSG and the rendering efficiency is also high.

关 键 词：地形 多分辨率 四叉树 OSG 并行 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]