航天试验任务星体外观可视化方法研究

Research on Visualization Method of Planet Appearance in Aerospace Experiments

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 theproblems of storage, scheduling and rendering of the huge volume and multi-resolution images wereresolved. A visually correct terrain rendering algorithm was introduced in which the DEM data andtexture were managed in a coherent framework, and 3D height information was rendered on GPUwith 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 proposedvisualization method.