AM Posted August 27, 2018 Share Posted August 27, 2018 (edited) ;; a function which fills up a sequence randomly - max-length = length sequence ;; (regardless of the number of cycles) (defun rnd-complete-seq (n &key sequence (step 1) seed (sort '<) (exclude nil) (append-excluded nil)) (let* ((testseq) (sequence (if (null exclude) sequence (filter-remove exclude sequence))) (sequence (loop repeat (length sequence) with sequence = (loop repeat n with seq = '() do (setf seq (append (rnd-unique step sequence :seed seed) seq)) do (setf sequence (filter-remove seq sequence)) collect seq) for i in (if (equal sort '<) (sort-asc sequence) (sort-desc sequence)) collect i))) (if (null append-excluded) sequence (progn (cond ((pitchp (first (car (last sequence)))) (setf testseq (pitch-to-midi sequence))) ((velocityp (first (car (last sequence)))) (setf testseq (get-velocity sequence))) (t (setf testseq sequence))) (if (< (first (car (last testseq))) (second (car (last testseq)))) (list sequence (sort-asc (append exclude (car (last sequence))))) (list sequence (sort-desc (append exclude (car (last sequence)))))))))) ;;; EXAMPLES (rnd-complete-seq 8 :sequence (expand-tonality '(b3 messiaen-mode6))) => ((b3) (b3 a4) (b3 a4 as4) (b3 f4 a4 as4) (b3 e4 f4 a4 as4) (b3 cs4 e4 f4 a4 as4) (b3 cs4 ds4 e4 f4 a4 as4) (b3 cs4 ds4 e4 f4 g4 a4 as4)) ;or => ((as4) (e4 as4) (e4 f4 as4) (cs4 e4 f4 as4) (cs4 e4 f4 g4 as4) (b3 cs4 e4 f4 g4 as4) (b3 cs4 ds4 e4 f4 g4 as4) (b3 cs4 ds4 e4 f4 g4 a4 as4)) ;or .... (rnd-complete-seq 5 :sequence '(0 1 2 3 4 5 6 7 8 9 10 11 12)) => ((1) (1 7) (0 1 7) (0 1 7 9) (0 1 7 9 11)) ;or => ((0) (0 1) (0 1 11) (0 1 6 11) (0 1 6 11 12)) ;or .... (rnd-complete-seq 5 :step 2 :sequence '(0 1 2 3 4 5 6 7 8 9 10 11 12)) => ((1 7) (0 1 7 8) (0 1 5 7 8 12) (0 1 5 7 8 9 10 12) (0 1 2 5 7 8 9 10 11 12)) (rnd-complete-seq 5 :step 2 :sequence '(0 1 2 3 4 5 6 7 8 9 10 11 12) :seed 234) => ((4 12) (3 4 11 12) (2 3 4 10 11 12) (2 3 4 5 9 10 11 12) (1 2 3 4 5 8 9 10 11 12)) (rnd-complete-seq 5 :step 2 :sequence '(0 1 2 3 4 5 6 7 8 9 10 11 12) :sort '> :seed 234) => ((12 4) (12 11 4 3) (12 11 10 4 3 2) (12 11 10 9 5 4 3 2) (12 11 10 9 8 5 4 3 2 1)) (rnd-complete-seq 5 :step 2 :sequence '(pppp ppp pp p mp mf f ff fff ffff) :sort '> :seed 234) => ((ffff p) (ffff fff p pp) (ffff fff ff p pp ppp) (ffff fff ff f mp p pp ppp) (ffff fff ff f mf mp p pp ppp pppp)) ;;; examples with EXCLUDE (rnd-complete-seq 4 :sequence '(1 2 3 4 5 6 7 8) :exclude '(1 8)) => ((5) (4 5) (2 4 5) (2 4 5 6)) (rnd-complete-seq 4 :sequence '(1 2 3 4 5 6 7 8) :exclude '(1 8) :append-excluded t) => (((7) (4 7) (4 5 7) (4 5 6 7)) (1 4 5 6 7 8)) (rnd-complete-seq 4 :sequence '(pppp ppp pp p mp mf f ff fff ffff) :exclude '(pppp ffff) :append-excluded t) => (((mf) (p mf) (ppp p mf) (ppp p mf f)) (pppp ppp p mf f ffff)) Edited August 31, 2018 by AM extended version! loopyc 1 Quote Link to comment Share on other sites More sharing options...
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