Oleg Kobchenko wrote: > Also I think there used to be a 2D Circle Puzzler > in J, maybe even among Studio demos, but I haven't > seen it in a while. Does anyone recall? > > Something similar to > http://www.geocities.com/jaapsch/puzzles/circleman.htm
Early versions of J did have Engel's Enigma puzzle, later renamed the Turnstile puzzle, see http://www.geocities.com/jaapsch/puzzles/turnstil.htm at the same site. There were problems drawing it in the early versions of J. The diagram was drawn using a series of arcs or straight lines, then blocks colored with a gl2 function called (I think) glflood. Unfortunately, glflood was unreliable and sometimes the color leaked from one block to another, so the code was fudged to prevent this. Later versions of J dropped glflood, and hence also Enigma. It would be an interesting exercise to redo Enigma with current J. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
