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将正八面体上下相邻的两个三角形面片合并成一个四分体,建立二维坐标系,在此基础上采用六边形格网单元的层次编码方案,分析了不同位置格网单元的编码特征,提出了一种"孔4双轴查找算法",实现了相应的邻接单元及父、子单元查找,并进行了相关实验及对比分析。结果表明,该算法和传统的Vince算法相比较,邻接单元查找速度提高了约900倍,父单元和子单元的查找速度均提高了约120倍。 更多还原

【Abstract】 Take octahedron as an example,the aperture 4 hexagonal discrete global grids(A4HDGGs) is analyzed in this paper.The two adjacent triangle patches(up and down) in the platonic polyhedron are merged into one quadrilateral to create a twodimensional coordinate system,and the hierarchical location coding on A4HDGGs is therefore put forward.Firstly,the coding characteristics of A4HDGGs in different positions are analyzed.Secondly,a searching algorithm for A4HDGG,called A4-2D-coordinates,is given in d...