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Diffstat (limited to 'lisp/play/blackbox.el')
| -rw-r--r-- | lisp/play/blackbox.el | 85 |
1 files changed, 43 insertions, 42 deletions
diff --git a/lisp/play/blackbox.el b/lisp/play/blackbox.el index 81bd3063145..8de46c2f025 100644 --- a/lisp/play/blackbox.el +++ b/lisp/play/blackbox.el @@ -19,51 +19,52 @@ ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License -;; along with GNU Emacs; see the file COPYING. If not, write to -;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. +;; along with GNU Emacs; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. ;;; Commentary: -; by F. Thomas May <uw-nsr!uw-warp!tom@beaver.cs.washington.edu> -; doc comment by Root Boy Jim <rbj@dsys.icst.nbs.gov>, 27 Apr 89 -; interface improvements by ESR, Dec 5 1991. - -; The object of the game is to find four hidden balls by shooting rays -; into the black box. There are four possibilities: 1) the ray will -; pass thru the box undisturbed, 2) it will hit a ball and be absorbed, -; 3) it will be deflected and exit the box, or 4) be deflected immediately, -; not even being allowed entry into the box. -; -; The strange part is the method of deflection. It seems that rays will -; not pass next to a ball, and change direction at right angles to avoid it. -; -; R 3 -; 1 - - - - - - - - 1 -; - - - - - - - - -; - O - - - - - - 3 -; 2 - - - - O - O - -; 4 - - - - - - - - -; 5 - - - - - - - - 5 -; - - - - - - - - R -; H - - - - - - - O -; 2 H 4 H -; -; Rays which enter and exit are numbered. You can see that rays 1 & 5 pass -; thru the box undisturbed. Ray 2 is deflected by the northwesternmost -; ball. Likewise rays 3 and 4. Rays which hit balls and are absorbed are -; marked with H. The bottom of the left and the right of the bottom hit -; the southeastern ball directly. Rays may also hit balls after being -; reflected. Consider the H on the bottom next to the 4. It bounces off -; the NW-ern most ball and hits the central ball. A ray shot from above -; the right side 5 would hit the SE-ern most ball. The R beneath the 5 -; is because the ball is returned instantly. It is not allowed into -; the box if it would reflect immediately. The R on the top is a more -; leisurely return. Both central balls would tend to deflect it east -; or west, but it cannot go either way, so it just retreats. -; -; At the end of the game, if you've placed guesses for as many balls as -; there are in the box, the true board position will be revealed. Each -; `x' is an incorrect guess of yours; `o' is the true location of a ball. +;; by F. Thomas May <uw-nsr!uw-warp!tom@beaver.cs.washington.edu> +;; doc comment by Root Boy Jim <rbj@dsys.icst.nbs.gov>, 27 Apr 89 +;; interface improvements by ESR, Dec 5 1991. + +;; The object of the game is to find four hidden balls by shooting rays +;; into the black box. There are four possibilities: 1) the ray will +;; pass thru the box undisturbed, 2) it will hit a ball and be absorbed, +;; 3) it will be deflected and exit the box, or 4) be deflected immediately, +;; not even being allowed entry into the box. +;; +;; The strange part is the method of deflection. It seems that rays will +;; not pass next to a ball, and change direction at right angles to avoid it. +;; +;; R 3 +;; 1 - - - - - - - - 1 +;; - - - - - - - - +;; - O - - - - - - 3 +;; 2 - - - - O - O - +;; 4 - - - - - - - - +;; 5 - - - - - - - - 5 +;; - - - - - - - - R +;; H - - - - - - - O +;; 2 H 4 H +;; +;; Rays which enter and exit are numbered. You can see that rays 1 & 5 pass +;; thru the box undisturbed. Ray 2 is deflected by the northwesternmost +;; ball. Likewise rays 3 and 4. Rays which hit balls and are absorbed are +;; marked with H. The bottom of the left and the right of the bottom hit +;; the southeastern ball directly. Rays may also hit balls after being +;; reflected. Consider the H on the bottom next to the 4. It bounces off +;; the NW-ern most ball and hits the central ball. A ray shot from above +;; the right side 5 would hit the SE-ern most ball. The R beneath the 5 +;; is because the ball is returned instantly. It is not allowed into +;; the box if it would reflect immediately. The R on the top is a more +;; leisurely return. Both central balls would tend to deflect it east +;; or west, but it cannot go either way, so it just retreats. +;; +;; At the end of the game, if you've placed guesses for as many balls as +;; there are in the box, the true board position will be revealed. Each +;; `x' is an incorrect guess of yours; `o' is the true location of a ball. ;;; Code: |