摘要： 提出一种基于投影网格的全球多分辨率地形绘制算法。利用投影网格剖分球面，快速完成视域内球面的非均匀网格化。对地形数据分层组织、分块存储，通过可视区域计算，实现高效率的地形数据装载和更新。由于每帧网格数量保持基本不变，确保了稳定的帧率。实验结果表明该算法在全球三维地形实时绘制上能取得较好的视觉效果，计算量小、具有较高的效率。
关键词:
投影网格,
全球地形,
实时绘制,
多分辨率
Abstract: The paper proposes a multi-resolution global terrain rendering method based on projected grids. Using projected grids to subdivide the spherical surface enables fast asymmetric griding of the part which is visible. To improve the efficiency of data loading and updating, the terrain data is hierarchical organized and stored in tiles, and visible region is calculated beforehand. Rendering frame rate is steady because the amount of grids is settled. The experimental results show that the proposed method is ineffective on global 3D terrain real-time rendering, and it can generate visually convincing results with inexpensive computation.
Key words:
projected grid,
global terrain,
real-time rendering,
multi-resolution
中图分类号:
康 来;吴玲达;宋汉辰;杨 冰. 基于投影网格的全球多分辨率地形绘制[J]. 计算机工程, 2009, 35(8): 230-232.
KANG Lai; WU Ling-da; SONG Han-chen; YANG Bing. Multi-resolution Global Terrain Rendering Based on Projected Grid[J]. Computer Engineering, 2009, 35(8): 230-232.