基于LOD的大规模输电线路场景实时渲染算法优化

摘要

A LOD algorithm by simulating the characteristics of the human eye and based on multiple control factors is proposed which is used to solve the problem of the low efficiency of the large-scale terrain environment simulation for transmission line corridor.The algorithm comprehensively considers the distance and terrain factors to simplifv the terrain mesh,combined with the characteristics of the simulation scene mostly working in roaming mode.Moreover,in the evaluation function,the viewpoint movement speed is regarded as an important control factor.The optimized algorithm can simplify the calculation model of the evaluation function in the perspective of roaming state.The comparison experiment shows that the proposed algorithm has faster rendering speed than the ROAM algorithm and the restricted quadtree algorithm.%针对输电线路走廊大规模地形环境仿真渲染效率较低的问题,通过模拟人眼视角的特点,提出一种基于多控制因子的LOD算法.该算法在综合考虑距离、地形因素对地形网格进行简化的基础上,结合仿真场景大部分工作在漫游模式下的特点,将视点移动速度作为一个重要的控制因子放入评价函数中,优化后的算法在视角漫游状态下,可通过评价函数计算模型简化程度.对比实验表明本文算法比ROAM算法、限制四叉树算法具有更快的渲染速度.