In the late 80's SSI Published a series of AD&D computer games starting with Pool of Radiance 1. Some of these came with a decoder Wheel required to enter the game and at some points during game play. This program simlates the decoder wheel as required for entering the game.
In its present form, it doesn't implement glyph-at-a-time translation which is occasionally required during game play.
You'll need a recent copy of Maven installed in order to build this.
Running mvn package will deposit a "jar-with-dependencies" in the
target directory:
$ mvn package
...
... [INFO] blah blah blah maven blah blah
...
$ java -jar target/PoolradWheel-1.0-SNAPSHOT-jar-with-dependencies.jar
Source images for the glyphs are in src/images. This script scales them down from 256x256 to 24x24 and copies them to src/main/resources using ImageMagic.