【摘要】 提出了广度八叉树、深度八叉树概念,分析了它们逻辑结构和存储结构,探讨了这两种数据结构在三维数据场可视化中的应用,把深度八叉树应用于三维数据场LOD体绘制算法中。算法在某三维震波数据场进行了体绘制实验,并与传统方法进行了比较分析。结果表明,该方法通过逐层简化细节来减少场景的复杂性,提高了渲染效率,将全局和局部体绘制相结合,既提高了绘制速度,又实现了精细观察。更多还原

【Abstract】 This paper put forward the concepts of breadth-oct-tree and depth-oct-tree.It analyzed their logic structures and storage structures,which were applied in 3D data set visualization.Depth-oct-tree was used in LOD volume rendering algorithm which was tested on a sismic wave data set.Compared with the traditional method,the new algorithm was much faster.On the contrary,the traditional method cannot be applied in PCs due to the large amount of time and space required.The results indicate that the new method can improve the performance of volume rendering.Especially,combining the whole and part volume rendering method,the speed was higher and more elaborated observation was achieved.更多还原