基于多核CPU的大规模DEM并行三维渲染

Parallel Rendering of Large scale DEM Based on Multi core CPU

摘要: 采用数据分块进行地形数据组织，基于缓存策略进行数据调度，对各地形块采用四叉树LoD(level of detail)的细节简化算法，利用多核CPU的计算特性实现四叉树LoD的并行生成，在动态构造地形三角网后，让不同的CPU核心负责不同地形区域以实现并行渲染，基于OpenMP及OpenThreads建立原型系统。实验结果表明,并行化渲染具有明显的性能优势。

Abstract: DEM data is organized in blocks and scheduled with cache. An algorithm based on LoD is implemented with multi core CPU for simplifying the terrain triangulation network dynamically during rendering process. The terrain model is divided into pieces so that the rendering process for each piece can be implemented in parallel. An experimental system based on parallel rendering algorithm is developed, with OpenMP and OpenThreads. The results show that the rendering performance of the 3D DEM system is improved efficiently based on parallel algorithm as compared with traditional algorithm.