离散点集生成等值线的算法实现涉及四个方面：离散点三角形剖分建立不规则三角网（D-TIN）、基于D-TIN内插生成等值点集合，开闭两类等高线同时绘制，等值线适度光滑和标注。（VS2010+AE10+C#）-Discrete point set to generate contour algorithm involves four aspects: establish discrete points triangular subdivision of irregular triangle net (