Suppose you are in a room whose walls consist of at least three mirrors. Standing in this room you will see a reflection of the room in each mirror. Furthermore, if you look a little further, you will see reflections of the reflections and so on. In the figure above, we start out with a room of three sides where there are no reflections. You may increase or decrease the number of reflections with the buttons in the #R block. For example, if #R = 1 you will just see reflections of the room. If #R=2 you'll see reflections AND reflections of reflections, and so on.
You can move the mirrors by dragging and dropping each corner (the red squares). While dragging, this square will become green.
You can also add and subtract mirrors (up to 10 and down to 3). The button that says either "Immediate" or "Patient" dictates whether the reflections should be drawn dynamically while you move the mirrors or the drawing should wait until you drop the mirror off.
(c) 2000 Justin Wyss-Gallifent