Clifford Heath wrote:
> [... description removed ...]

	Excellent!  That makes perfect sense!  Thank you very
much for explaining it!!!

> Then we created a 3-D perspective view looking in from near one
> corner between two layers, so you can see all the passages, the
> ladders climbing up to the layer above, and the manholes where
> ladders appear from below, so you can wander around the maze at
> will. We even animated the ladder climbing using double
> buffering, moving the camera up past the floor to the next floor.
> All in Turbo-Pascal for a year 10 assignment :-). My son solved
> a 20x20x20 maze in about 10 minutes, much to his teacher's
> astonishment - he has an amazing visual memory.

	That's incredible!

> I used to print him 2-D mazes with a 1/8" cell size, full page on
> letter paper - perhaps 60x80 in size. When he was four years old,
> he complained that he needed some new ones, and my wife pointed
> out that he had a stack of sixty that were unmarked. He quickly
> went through the stack, pointing to the solution on each one. He
> had not only solved them all by eye, but he recognised each one
> and remembered its solution! Scary...
> 
> Clifford Heath.

	Wow... very impressive!!!  Looks like you've got a genius
on your hands!  Very cool.

	Thanks again!
-- Glenn