基于LOD技术的多分辨率海水场景实时仿真

Real-Time Simulation of Multi-Resolution Seawater Scene Based on LOD Technology

针对传统海水场景渲染时速度慢、真实性差的问题,提出了一种基于四叉树的多分辨率海面渲染方法。考虑到大面积海陆交界面数据的海量性以及近陆地水面细节较多的特征,根据视点远近和离陆地的远近两个因素,建立节点细分评价体系,构建水面线性四叉树索引,分层分块组织水面地形数据,并利用不同分辨率的海面数据分批调入和组合显示。实验结果表明,与基于构造的方法相比,所提出的大规模海面渲染算法,合理调度三维场景数据,不仅保证了水面模拟的真实度,同时达到很好的实时效率,适用于三维应用中海陆交界面实时虚拟漫游场景模拟。

In traditional seawater scene rendering,the rendering speed is slow.Therefore,multi-resolution sea surface rendering method based on quadtree was proposed.It was necessary to consider the massive data of large area of sea-land interface and many features of details of water surface near the land.According to the two factors such as the distance between viewpoints and the distance from land,we built the node subdivision evaluation system and constructed a linear quadtree index of water surface.Then,we organized the data of water surface topography hierarchically.Meanwhile,we used sea surface data with different resolutions to transfer and display in batches.Simulation results show that the proposed algorithm can reasonably schedule three-dimensional scene data compared with the structure-based method.It not only ensures the trueness of simulation for water surface,but also achieves good real-time efficiency.This method is suitable for real-time virtual roaming scene simulation of a sea-land interface in three-dimensional application.