My name is Lucas Hoots and I am researching with a professor and a classmate this summer at Centre College in Kentucky.  We are investigating a problem about trapping light with disjoint segment mirrors.  What we need is similar to the multiple reflection from two plane mirrors applet that you have already created.  Basically, we need a single light source that emits rays in all directions. Then, we need to be able to draw line segments (mirrors) that will reflect from both sides.  This way we can test various designs that produce the best "trapping". We need to see the rays that will get between the disjoint mirrors.  Does this sound like something that is possible?  If you need any more information please contact me at allison.perkins@centre.edu.  Thank you so much!