A light tracing tree (LTT) can be set up according to the light tracing theory and the covering area can be simulated using the information saved in the nodes of the LTT.

• 该算法根据光线追踪理论和有关光学原理建立光线传播树，并通过可视化方法在计算机上对光线照射到的区域进行仿真。