三维任意区域的四面体网格剖分，本代码为开源的Tetgen生成的代码，可以方便大家在三位有限元数值算例时计算复杂的区域-The tetrahedral mesh 3D any area of ​ ​ the code code open source Tetgen generation cases when the computational complexity of the area, you can easily three finite element numerica