这是一个提供二维区域Delaunay三角形剖分的 C语言程序。能够对于由折线围成的多空洞、多介质区域，生成指定局部加密的Delaunay三角形剖分。-This is a two-dimensional region to provide Delaunay triangulation of the C language program. The broken line surrounded by long and short hole, multi medium region, generatin