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Colin Randall

unread,
Sep 29, 2021, 10:12:57 AM9/29/21
to
Hi ...

from someone's sig sometime (JavaScript)
i've put a minimal wrapper on it (for convenience)
but left the 4-line script as is


------------8<----cut-here-------8<-----
<HTML>
<HEAD>
<TITLE>anim</TITLE>
</HEAD>
<body bgcolor="#FFF6E9" text="#800000">

<pre id=D></pre><script>A=0,B=0,D=document.getElementById('D'),b=[];
function u(){n=Math.sin(B);for(k=0;1840>k;k++)y=-10-k/80|0,o=41+(k%80
-40)*1.3/y+n|0,N=A-100.0/y,b[k]=k%80==79?"\n":".#"[o+N&1];D.innerHTML
=b.join('');A+=0.05;B+=0.03;setTimeout(u,10);}u();</script>

</BODY>
</HTML>
------------8<----cut-here-------8<-----


--
.
._!__ __ __
/ _\/_ |_ \!_
/ / 7 / /|
\ \_ _/ / \ .
\_//__/|_\_\!_.
|

Eli the Bearded

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Sep 30, 2021, 9:00:25 PM9/30/21
to
In alt.ascii-art.animation, Colin Randall <colin.r...@gmail.com> wrote:
> from someone's sig sometime (JavaScript)

Date: Tue, 19 Aug 2008 13:47:54 -0500
From: 3Dimka <di...@usa.com>
Newsgroups: alt.ascii-art
Subject: cool ASCII javascript animation

cool ASCII javascript animation:
http://a1k0n.net/temp/jsthing.html

a1k0n.net is no longer on the net. I haven't tried looking at it in the
Wayback machine.

> ------------8<----cut-here-------8<-----
> <HTML>
> <HEAD>
> <TITLE>anim</TITLE>
> </HEAD>
> <body bgcolor="#FFF6E9" text="#800000">
>
> <pre id=D></pre><script>A=0,B=0,D=document.getElementById('D'),b=[];
> function u(){n=Math.sin(B);for(k=0;1840>k;k++)y=-10-k/80|0,o=41+(k%80
> -40)*1.3/y+n|0,N=A-100.0/y,b[k]=k%80==79?"\n":".#"[o+N&1];D.innerHTML
> =b.join('');A+=0.05;B+=0.03;setTimeout(u,10);}u();</script>
>
> </BODY>
> </HTML>
> ------------8<----cut-here-------8<-----

Fun. Some tweaks:

1840>k : maximum number of characters to display, try 2560>k

k/80 k%80 k%80==79: line length try "3000>k" and all "80"s to "120",
and "79" to "119"

y=-10-k : -10 controls zoom. Numbers closer to zero are smaller
boxes, numbers further are bigger. Try -5 or -20

".#"[o+N&1] : character set used and selector. Try:
".+$#"[o+N&3] or " .:|+*$#"[o+N&7]

o=41 -40 : controls the skew, Try 51 and -10

A-100.0 : controls top to bottom changes, -50.0 is tall and fast
-200.0 is short and slow

A+=0.05 : top to bottom changes, too, 0.5 is very fast, 0.005
creeps

B+=0.03 : side to side speed, 0.25 is a dizzyingly fast wobble

Now I'm thinking about a tiny IOCCC raytracer from back in the day
and wondering if that can be tweaked for ASCII art output.

Elijah
------
first would have to find the IOCCC code

Colin Randall

unread,
Dec 11, 2021, 6:06:35 AM12/11/21
to
On 01/10/2021 02:00, Eli the Bearded wrote:
> In alt.ascii-art.animation, Colin Randall <colin.r...@gmail.com> wrote:
>> from someone's sig sometime (JavaScript)
>
> Date: Tue, 19 Aug 2008 13:47:54 -0500
> From: 3Dimka <di...@usa.com>
> Newsgroups: alt.ascii-art
> Subject: cool ASCII javascript animation
>
> cool ASCII javascript animation:
> http://a1k0n.net/temp/jsthing.html
>
> a1k0n.net is no longer on the net. I haven't tried looking at it in the
> Wayback machine.

i shall have a look for that
yep ... that was a lot of fun ... thx :)

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