这是一个基于C++实现的FDTD源代码。能求解三维Maxwell旋度方程。采用CPML吸收边界调节，其中每个方向的PML吸收层厚度可以不一样-This C code implements the finite-difference time-domain solution of Maxwell s curl equations over a three-dimensional Cartesian space lattice. The grid is terminated by CPML