DDA算法，中点算法，Bresenham算法生成直线，进行区域填充-DDA algorithm, the midpoint algorithm, Bresenham algorithm to generate a straight line, the area filling

主要研究离散点的Delaunay三角网生成算法、基于三角网等值线生成算法以及等值线区域填充-Main research Delaunay triangular mesh generation algorithm of discrete points isoline, based on triangular mesh generation algorithm and contour area filling