115 lines
3.2 KiB
Common Lisp
115 lines
3.2 KiB
Common Lisp
;;Okay so what we're going to be doing here in this version is treating
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;;line structure as a thing that is a mix of blank space and word space
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;;so a line will now be a list like
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;; (#\SPACE #\- #\* #- #\SPACE #\SPACE)
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(defvar *poem-line* 0)
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(defvar *poem-stanza* 0)
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(defvar *avg-line* 0)
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(defun up-down (r)
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#'(lambda (x) (+ x (- (random (* 2 r)) r ))))
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(defun up-down-half (r)
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(funcall (up-down (floor (/ r 2))) r))
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(defun sines (&rest args)
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#'(lambda (time)
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(let ((res 0))
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(dotimes (i (length args))
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(setf res (+ res (* (nth i args) (sin (/ time (+ 1 i)))))))
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res)))
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;; this is really a stub for what will probably get more complicated
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(defun gen-line-f (f)
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(funcall f *poem-line*))
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(defun gen-line-rand (i)
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(declare (ignore i))
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(loop for x from 1 to (funcall (up-down (floor (/ *avg-line* 2))) *avg-line*)
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collecting (let ((r (random 10)))
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(cond ((< r 3) 'b)
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(t '-)))))
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(defun rand-list (avg-size low-bound up-bound)
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(let ((l (up-down-half avg-size)))
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(loop for x from 1 to l
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collecting (+ low-bound (random (- up-bound low-bound))))))
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(defun gen-line-half-space (f)
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#'(lambda (i)
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(let ((n (funcall f i)))
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(append
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(make-list (floor (/ n 2)) :initial-element 'b)
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(make-list n :initial-element '-)))))
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(defun gen-line-sine ()
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(let ((sins (apply #'sines (rand-list 5 -3 3))))
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(gen-line-half-space #'(lambda (x) (floor (+ *avg-line* (funcall sins x)))))))
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(defun gen-line-signal (f)
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#'(lambda (i)
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(let ((len (up-down-half *avg-line*)))
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(loop for x from 1 to len
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collecting (if (> (funcall f (+ (* i *avg-line*) x)) 0)
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'-
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'b)))))
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(defun palindrome (l)
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(append l (reverse l)))
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(defun gen-line-signal-sym (f)
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#'(lambda (i)
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(let ((len (floor (/ (up-down-half *avg-line*) 2))))
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(palindrome (loop for x from 1 to len
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collecting (if (> (funcall f (+ (* i *avg-line*) x)) 0)
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'-
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'b))))))
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(defun gen-line-horiz-sines ()
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(let ((sins (apply #'sines (rand-list 5 -3 3))))
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(gen-line-signal sins)))
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(defun gen-line-horiz-sines-sym ()
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(let ((sins (apply #'sines (rand-list (+ 3 (random 4)) -3 3))))
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(gen-line-signal-sym sins)))
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(defun gen-stanza (avg-stanza line-fun)
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(loop for x from 1 to (funcall (up-down 3) avg-stanza)
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do (incf *poem-line*)
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collect (gen-line-f line-fun)))
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(defun gen-poem (num-stanza avg-stanza line-fun)
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(loop for x from 1 to (funcall (up-down 2) num-stanza)
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collect (gen-stanza avg-stanza line-fun)))
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(defun print-line (l)
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(let ((s ""))
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(dolist (c l)
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(setf s (concatenate 'string s "|"
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(case c
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(b " ")
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(- "-")))))
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(format t "~a~%" s)))
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;; takes a list of stanzas and prints it
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(defun print-poem (poem)
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(dolist (s poem)
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(dolist (l s)
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(print-line l))
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(format t "~%")))
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(defun main (argv)
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(let* ((fun-choice (parse-integer (nth 1 argv)))
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(num-stanza (parse-integer (nth 2 argv)))
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(avg-stanza (parse-integer (nth 3 argv)))
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(*avg-line* (parse-integer (nth 4 argv)))
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(line-fun
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(cond ((= fun-choice 0) #'gen-line-rand)
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((= fun-choice 1) (gen-line-sine))
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((= fun-choice 2) (gen-line-horiz-sines))
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((= fun-choice 3) (gen-line-horiz-sines-sym)))))
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(setf *random-state* (make-random-state t))
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(print-poem (gen-poem num-stanza avg-stanza line-fun))))
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