计算GTD-UTD绕射源代码，我同学所有。不过可惜是外文。

几何绕射问题：针对几种常见场景的几何绕射系数计算。(This file contain functions to diffraction coeficient for several solid shapes: - absorbig screens; - square wedges; - conductor screens. It provides the coalculation of the tansition function to solve GTD problem