A fast hidden surface removal algorithm for electrically large problem

It is consume much time for hidden surface removal when compute the scattering of electrically large object by physical optics method. In this paper, a fast hidden surface removal algorithm is presented. First, the planar triangles covering the body surface are divided into several groups. The characteristic vectors of each groups is selected. Then, the dot product of the characteristic vectors and orientation vector of the incident wave are computed and the group is judged if illuminated by the incident wave. At last, the group which is not all the planar triangles are illuminated is judge by each planar triangle one by one. The computed results shown that our algorithm can improve the computation efficiency when the number of the planar triangles is very large.