Visibility with Multiple Reflections
Visibility with Multiple Reflections
复制标题
多次反射的可见性
DOI:
10.1007/3-540-61422-2_139
复制
发表时间:
1996
影响因子:
0.8
通讯作者:
D. Prasad
中科院分区:
文献类型:
--
作者:
B. Aronov;Alan R. Davis;T. Dey;S. P. Pal;D. Prasad
Abstract. We show that the region lit by a point light source inside a simple n -gon after at most k reflections off the boundary has combinatorial complexity O(n2k) , for any k≥ 1 . A lower bound of Ω ((n/k-Θ(1))2k) is also established which matches the upper bound for any fixed k . A simple near-optimal algorithm for computing the illuminated region is presented, which runs in O(n2k log n) time and O(n2k) space for k>1 , and in O(n2 log2 n) time and O(n2) space for k=1 .