对输入的数据点进行三角刨分，并将三角刨分后得到的结果进行四边形划分，得到四边形网格-Input data points on the plane triangular points, and sub-triangular plane quadrilateral obtained by the results obtained quadrilateral mesh

离散高程点生成TIN的算法，分治算法，速度还可以，对于数据量比较大的情况也有不错的处理速度 和效果。-Discrete elevation points to generate the TIN algorithm, divide and conquer algorithm, the speed can also be larger than the data also has good processing speed and eff