一种基于二叉树结构的大规模地形实时渲染方法

对于大规模地形而言，地形场景的实时动态渲染一直是人们关注的重点。该文在充分研究现行场景实时加速绘制算法的基础上提出了一种基于二叉树结构视相关的动态多层次细节地形渲染算法。文章主要分析了地形场景数据管理与实时调度、视相关多层次细节模型与可见性判断以及网格三角化中的裂缝处理等关键问题，并给出了相应的解决方法，最后改进了一种视相关节点重要性度量准则来进行帧频控制。实验结果表明该方法在保持地形场景逼真的情况下，有很好的帧稳定性，较好地实现了大规模地形的实时动态渲染。

A Real-time Large Scale Terrain Rendering Method Based on Bintree Data Structure

Real-time dynamic rendering of large scale terrain scene has always attracted extensive attention. In this paper, a real-time large scale terrain rendering method based on bintree data structure is presented, which relies on thorough research into existing algorithm for real-time accelerated rendering of terrain scene. Some key problems including management and real-time attemperment of scene data, view-dependent LOD modal, judgement of node visibility , and cracks in mesh triangulation are mainly analyzed in this treatise. The solutions corresponding to these problems are also given. Finally, a measurement rule with essentiality of view-dependent node is improved to control frame frequency. Some experiments prove that this method can work well.