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- ; Blackbox game in Emacs Lisp
-
- ; by F. Thomas May
- ; uw-nsr!uw-warp!tom@beaver.cs.washington.edu
-
- (defvar blackbox-mode-map nil "")
-
- (if blackbox-mode-map
- ()
- (setq blackbox-mode-map (make-keymap))
- (suppress-keymap blackbox-mode-map t)
- (define-key blackbox-mode-map "\C-f" 'bb-right)
- (define-key blackbox-mode-map "\C-b" 'bb-left)
- (define-key blackbox-mode-map "\C-p" 'bb-up)
- (define-key blackbox-mode-map "\C-n" 'bb-down)
- (define-key blackbox-mode-map "\C-e" 'bb-eol)
- (define-key blackbox-mode-map "\C-a" 'bb-bol)
- (define-key blackbox-mode-map " " 'bb-romp)
- (define-key blackbox-mode-map "\C-m" 'bb-done))
-
-
- ;; Blackbox mode is suitable only for specially formatted data.
- (put 'blackbox-mode 'mode-class 'special)
-
- (defun blackbox-mode ()
- "Major mode for playing blackbox.
-
- SPC -- send in a ray from point, or toggle a ball
- RET -- end game and get score
-
- Precisely,\\{blackbox-mode-map}"
- (interactive)
- (kill-all-local-variables)
- (use-local-map blackbox-mode-map)
- (setq truncate-lines t)
- (setq major-mode 'blackbox-mode)
- (setq mode-name "Blackbox"))
-
- (defun blackbox (num)
- "Play blackbox. Arg is number of balls."
- (interactive "P")
- (switch-to-buffer "*Blackbox*")
- (blackbox-mode)
- (setq buffer-read-only t)
- (buffer-flush-undo (current-buffer))
- (setq bb-board (bb-init-board (or num 4)))
- (setq bb-balls-placed nil)
- (setq bb-x -1)
- (setq bb-y -1)
- (setq bb-score 0)
- (setq bb-detour-count 0)
- (bb-insert-board)
- (bb-goto (cons bb-x bb-y)))
-
- (defun bb-init-board (num-balls)
- (random t)
- (let (board pos)
- (while (>= (setq num-balls (1- num-balls)) 0)
- (while
- (progn
- (setq pos (cons (logand (random) 7) (logand (random) 7)))
- (bb-member pos board)))
- (setq board (cons pos board)))
- board))
-
- (defun bb-insert-board ()
- (let (i (buffer-read-only nil))
- (erase-buffer)
- (insert " \n")
- (setq i 8)
- (while (>= (setq i (1- i)) 0)
- (insert " - - - - - - - - \n"))
- (insert " \n")))
-
- (defun bb-right ()
- (interactive)
- (if (= bb-x 8)
- ()
- (forward-char 2)
- (setq bb-x (1+ bb-x))))
-
- (defun bb-left ()
- (interactive)
- (if (= bb-x -1)
- ()
- (backward-char 2)
- (setq bb-x (1- bb-x))))
-
- (defun bb-up ()
- (interactive)
- (if (= bb-y -1)
- ()
- (previous-line 1)
- (setq bb-y (1- bb-y))))
-
- (defun bb-down ()
- (interactive)
- (if (= bb-y 8)
- ()
- (next-line 1)
- (setq bb-y (1+ bb-y))))
-
- (defun bb-eol ()
- (interactive)
- (setq bb-x 8)
- (bb-goto (cons bb-x bb-y)))
-
- (defun bb-bol ()
- (interactive)
- (setq bb-x -1)
- (bb-goto (cons bb-x bb-y)))
-
- (defun bb-romp ()
- (interactive)
- (cond
- ((and
- (or (= bb-x -1) (= bb-x 8))
- (or (= bb-y -1) (= bb-y 8))))
- ((bb-outside-box bb-x bb-y)
- (bb-trace-ray bb-x bb-y))
- (t
- (bb-place-ball bb-x bb-y))))
-
- (defun bb-place-ball (x y)
- (let ((coord (cons x y)))
- (cond
- ((bb-member coord bb-balls-placed)
- (setq bb-balls-placed (bb-delete coord bb-balls-placed))
- (bb-update-board "-"))
- (t
- (setq bb-balls-placed (cons coord bb-balls-placed))
- (bb-update-board "O")))))
-
- (defun bb-trace-ray (x y)
- (let ((result (bb-trace-ray-2
- t
- x
- (cond
- ((= x -1) 1)
- ((= x 8) -1)
- (t 0))
- y
- (cond
- ((= y -1) 1)
- ((= y 8) -1)
- (t 0)))))
- (cond
- ((eq result 'hit)
- (bb-update-board "H")
- (setq bb-score (1+ bb-score)))
- ((equal result (cons x y))
- (bb-update-board "R")
- (setq bb-score (1+ bb-score)))
- (t
- (setq bb-detour-count (1+ bb-detour-count))
- (bb-update-board (format "%d" bb-detour-count))
- (save-excursion
- (bb-goto result)
- (bb-update-board (format "%d" bb-detour-count)))
- (setq bb-score (+ bb-score 2))))))
-
- (defun bb-trace-ray-2 (first x dx y dy)
- (cond
- ((and (not first)
- (bb-outside-box x y))
- (cons x y))
- ((bb-member (cons (+ x dx) (+ y dy)) bb-board)
- 'hit)
- ((bb-member (cons (+ x dx dy) (+ y dy dx)) bb-board)
- (bb-trace-ray-2 nil x (- dy) y (- dx)))
- ((bb-member (cons (+ x dx (- dy)) (+ y dy (- dx))) bb-board)
- (bb-trace-ray-2 nil x dy y dx))
- (t
- (bb-trace-ray-2 nil (+ x dx) dx (+ y dy) dy))))
-
- (defun bb-done ()
- (interactive)
- (let (bogus-balls)
- (if (not (= (length bb-balls-placed) (length bb-board)))
- (message "Spud! You have only %d balls in the box."
- (length bb-balls-placed))
- (setq bogus-balls (bb-show-bogus-balls bb-balls-placed bb-board))
- (if (= bogus-balls 0)
- (message "Right! Your score is %d." bb-score)
- (setq bb-score (+ bb-score (* 5 bogus-balls)))
- (message "Veg! You missed %d balls. Your score is %d."
- bogus-balls bb-score))
- (bb-goto '(-1 . -1)))))
-
- (defun bb-show-bogus-balls (balls-placed board)
- (bb-show-bogus-balls-2 balls-placed board "x")
- (bb-show-bogus-balls-2 board balls-placed "o"))
-
- (defun bb-show-bogus-balls-2 (list-1 list-2 c)
- (cond
- ((null list-1)
- 0)
- ((bb-member (car list-1) list-2)
- (bb-show-bogus-balls-2 (cdr list-1) list-2 c))
- (t
- (bb-goto (car list-1))
- (bb-update-board c)
- (1+ (bb-show-bogus-balls-2 (cdr list-1) list-2 c)))))
-
- (defun bb-outside-box (x y)
- (or (= x -1) (= x 8) (= y -1) (= y 8)))
-
- (defun bb-goto (pos)
- (goto-char (+ (* (car pos) 2) (* (cdr pos) 22) 26)))
-
- (defun bb-update-board (c)
- (let ((buffer-read-only nil))
- (backward-char (1- (length c)))
- (delete-char (length c))
- (insert c)
- (backward-char 1)))
-
- (defun bb-member (elt list)
- "Returns non-nil if ELT is an element of LIST. Comparison done with equal."
- (eval (cons 'or (mapcar (function (lambda (x) (equal x elt))) list))))
-
- (defun bb-delete (item list)
- "Deletes ITEM from LIST and returns a copy."
- (cond
- ((equal item (car list)) (cdr list))
- (t (cons (car list) (bb-delete item (cdr list))))))
-
-
-
-