一种基于四叉树的动态多分辨率LOD大规模三维地形绘制研究

A study on rendering of large three-dimensional terrain for Multi-resolution LOD based on quadtree

四叉树和多分辫率技术是目前表示地形结构和显示地形的最佳方式。在研究以往算法基拙上,基于四叉树的动态多分辫率LOD地形简化方法进行改进,建立了适合分辫率要求的节点评价系统,引入了视线的影响,完善了基于视线的视距标准,使地形渲染更加真实。并借鉴并改进了一种双向裂缝消除方法,有效提高了地形逼真度。

Quad tree and multi-resolution technique are the most efficient ways to express and display complex terrains. After an overall, research of former algorithm, an improvement was made for LOD terrain simplification based on quad tree. A valuation system suitable for mufti-resolution was made, and introduce the effect of line sight, perfect the standard of stadia based on line of eye, make the terrain more reality, study and amend a method of recover the cracks according to distance, improve the fidelity of terrain effectively.