A Fast Shooting and Bouncing Ray Algorithm for Electromagnetics Scattering Based on Bounding Volume Hierarchy

Utilized a surface area heuristic (SAH) and bounding volume hierarchy (BVH) algorithm to accelerate ray tracing in the shooting and bouncing ray (SBR) algorithm, enabling fast computation of the scattering field for objects. The method use the SAH to partition all triangular elements and allocates them to different bounding boxes. By performing intersection calculations on bounding boxes at different levels, non-intersecting triangles are swiftly discarded, significantly reduce intersection computations. The computational results demonstrate that the method achieves lower computation times at all orders compared to the reference algorithm.