Matrix digital rain: Difference between revisions
(Small Lisp code edit, add output png, add categories) |
Thundergnat (talk | contribs) m (→{{header|Perl 6}}: Minor cosmetic twiddling, clean up better on exit) |
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Kind of cheap and cheesy, but what the heck... Probably will only work in POSIX compatible terminal. Runs until you hit ^C to exit. |
Kind of cheap and cheesy, but what the heck... Probably will only work in POSIX compatible terminal. Runs until you hit ^C to exit. |
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<lang perl6>signal(SIGINT).tap: { print "\e[H\e[J\e[?25h"; exit(0) } |
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⚫ | |||
⚫ | |||
'Ⲁ' .. '⳩', '∀' .. '∗', '℀' .. '℺', '⨀' .. '⫿'; |
'Ⲁ' .. '⳩', '∀' .. '∗', '℀' .. '℺', '⨀' .. '⫿'; |
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my ($rows,$cols) = qx/stty size/.words; |
my ($rows,$cols) = qx/stty size/.words; |
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my @c = flat "\e[38;2;255;255;255m", (255, |
my @c = flat "\e[38;2;255;255;255m", (255,250 … 30).map({"\e[38;2;0;$_;0m"}), |
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"\e[38;2;0;25;0m" xx 250; |
"\e[38;2;0;25;0m" xx 250; |
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my $sz = +@c; |
my $sz = +@c; |
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init($r, $c) if $r != $rows or $c != $cols; |
init($r, $c) if $r != $rows or $c != $cols; |
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print "\e[1;1H"; |
print "\e[1;1H"; |
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print join '', (^@s).map: { |
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@a[$_]<fg> = (@a[$_]<fg> + 1) % $sz; |
@a[$_]<fg> = (@a[$_]<fg> + 1) % $sz; |
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⚫ | |||
} |
} |
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@s[(^@s).pick] = @codes.roll for ^ |
@s[(^@s).pick] = @codes.roll for ^30; |
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} |
} |
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@a[$row * $cols + $col]<fg> = @o[$col]; |
@a[$row * $cols + $col]<fg> = @o[$col]; |
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} |
} |
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@o = (^@o).map: {(@o[$_] - |
@o = (^@o).map: {(@o[$_] - ($_ % 3)) % $sz}; |
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} |
} |
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}</lang> |
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} |
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END { print "\e[?25h \e[H\e[J";} # clear and reset screen</lang> |
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{{out|Sample output}} |
{{out|Sample output}} |
Revision as of 12:30, 19 December 2018
Implement the Matrix Digital Rain visual effect from the movie "The Matrix" as described in Wikipedia.
Provided is a reference implementation in Common Lisp to be run in a terminal.
Common Lisp
Runs in the terminal (using the Ncurses C library and the croatoan Lisp wrapper).
<lang lisp> (defun matrix-digital-rain ()
(with-screen (scr :input-echoing nil :input-blocking nil :cursor-visibility nil) (let* ((width (.width scr)) (height (.height scr)) ;; start at a random height in each column. (positions (loop repeat width collect (random height))) ;; run each column at a random speed. (speeds (loop repeat width collect (random 4)))) ;; hit the q key to exit the main loop. (add-event-handler (scr #\q) 'exit-event-loop) (add-event-handler (scr nil) (lambda (win event) ;; generate a random ascii char (flet ((randch () (+ 64 (random 58)))) (loop for col from 0 to (1- width) do (loop repeat (nth col speeds) do ;; position of the first point in the current column (let ((pos (nth col positions))) (setf (.attributes win) '(:bold)) (setf (.color-pair win) '(:white :black)) (add win (randch) :y (mod pos height) :x col) (setf (.color-pair win) '(:green :black)) (add win (randch) :y (mod (- pos 1) height) :x col) (add win (randch) :y (mod (- pos 2) height) :x col) (setf (.attributes win) '()) (add win (randch) :y (mod (- pos 3) height) :x col) ;; overwrite the last char half the height from the first char. (add win #\space :y (mod (- pos (floor height 2)) height) :x col) (refresh win) ;; advance the current column (setf (nth col positions) (mod (+ pos 1) height)))))))) (setf (.frame-rate scr) 20) (run-event-loop scr))))
</lang>
- Sample output:
https://i.imgur.com/17b36O3.png
Perl 6
Kind of cheap and cheesy, but what the heck... Probably will only work in POSIX compatible terminal. Runs until you hit ^C to exit.
<lang perl6>signal(SIGINT).tap: { print "\e[H\e[J\e[?25h"; exit(0) }
my @codes = flat 'Α' .. 'Π', 'Σ' .. 'ѵ', 'Ѐ' .. 'ѵ', 'Ҋ' .. 'ԯ', 'Ϣ' .. 'ϯ',
'Ⲁ' .. '⳩', '∀' .. '∗', '℀' .. '℺', '⨀' .. '⫿';
my ($rows,$cols) = qx/stty size/.words;
my @c = flat "\e[38;2;255;255;255m", (255,250 … 30).map({"\e[38;2;0;$_;0m"}),
"\e[38;2;0;25;0m" xx 250;
my $sz = +@c; my (@o, @s, @a); print "\e[?25l"; init($rows, $cols);
loop {
my ($r,$c) = qx/stty size/.words; init($r, $c) if $r != $rows or $c != $cols; print "\e[1;1H"; print join , (^@s).map: { @a[$_]<fg> = (@a[$_]<fg> + 1) % $sz; flat @c[@a[$_]<fg>], @a[$_]<bg>, @s[$_]; } @s[(^@s).pick] = @codes.roll for ^30;
}
sub init ($r, $c) {
@s = @codes.roll($r * $c); ($rows,$cols) = $r, $c; @a = {:bg("\e[48;5;232m")} xx +@s; my @o = (^@c).pick xx $cols; for ^$rows -> $row { for ^$cols -> $col { @a[$row * $cols + $col]<fg> = @o[$col]; } @o = (^@o).map: {(@o[$_] - ($_ % 3)) % $sz}; }
}</lang>
- Sample output:
See matrix-digital-rain-perl6.png (offsite png image)