针对航天试验任务中地球、月球等大尺度星体的真实感可视化问题，提出了新型的四叉树相容的金字塔模型，以解决可视化系统中多分辨率遥感影像的存储、调度和实时绘制问题；设计了视感正确的三维地形绘制方法，在统一的纹理框架下管理、调度高程数据，在GPU端执行地形信息的逐像素恢复。实验结果表明，该算法计算开销小、存储容量低，能在通用微机平台上实现大规模、复杂天体的实时绘制。%The realistic rendering for large scale planets in visualization system of aerospace experi⁃ments is a key issue. In this paper, a novel quad⁃tree based pyramid model was proposed and the problems of storage, scheduling and rendering of the huge volume and multi⁃resolution images were resolved. A visually correct terrain rendering algorithm was introduced in which the DEM data and texture were managed in a coherent framework, and 3D height information was rendered on GPU with per⁃pixel style. The feasibility of rendering complex scene of aerospace experiments on the cur⁃rent commercial computer was evaluated. The results demonstrated the effectiveness of the proposed visualization method.
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