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function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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rnbw

function u(t) {

for(c.width^=i=0;i++<210;)for(j=0;j++<7;x.fillStyle=`#f`+j*15)x.fillRect(i*9,540-S(a=t-i/80*C(t+i/69)+j*.89)*230,9,Math.max(210*S(a-1.1),0))

Nov 25 2019 7:18 PM UTC

}// 140/140

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an attempt at something like a twister

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u/Xen

mmmmm tasty!
u/tomxor

my exact thoughts #marshmallow
u/katkip

twisted icecream
u/Xen

#flump
u/joeytwiddle

That's a very juicy #twister!
u/cyhawk

I teach 9-year-olds programming and used a tidied up version of this to show them how to figure out how something works. They loved it! Thanks! I've added a bit of gap between the strands to make it easier to understand, and I think it looks good. Like Math.max(180*S(a-1.2),0).
u/rnbw

wow, i would have never thought that my recreational programming would be used for educational purposes. glad i was able to help those kids out on their journeys!
u/danny@hille.dk

Just saw this, nice code man! Save 11 b like this: for(c.width=i=300;i--;)for(j=8;j--;x.fillStyle=#f+j*15)x.fillRect(i,99-S(a=t-i/80*C(t+i/99)+j*.9)*40,1,Math.max(40*S(a-1.1),0))

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yonatan

remix of d/10685 by u/yonatan

function u(t) {

(t?j:c)[t?'outerHTML':'innerHTML']=h=`<svg id=j><filter id=f><feTurbulence baseFrequency=${t%1}>`
c.style.filter='url(#f)'

Oct 25 2018 5:53 PM UTC

}// 122/140

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Another SVG filter test

u/yonatan

97 chars: c.innerHTML=<svg><filter id=f><feTurbulence baseFrequency=${t%1} id=p>;c.style="filter:url(#f)"
u/yonatan

actually less, i don't know why there's an id=p in there
u/katkip

#maze

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yonatan

remix of d/10690 by u/yonatan

function u(t) {

eval(unescape(escape`挮楮湥版呍䰽怼獶朾㱦楬瑥爠楤㵦㸼晥呵牢畬敮捥⁢慳敆牥煵敮捹㴤笱⽴素牥獵汴㴢∯㸼晥䑩獰污捥浥湴䵡瀠楮㵓潵牣敇牡灨楣⁳捡汥㴤筴紾总砮景湴㴧㥩渠砧㭸⹦楬汔數琨挮獴祬攽≦楬瑥爺畲氨⍦⤢ⰰⰱ攳⤻`.replace(/u(..)/g,"$1%")))

Oct 25 2018 10:31 PM UTC

}// 140/140

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#waitforit

u/yonatan

c.innerHTML=<svg><filter id=f><feTurbulence baseFrequency=${1/t} result=""/><feDisplacementMap in=SourceGraphic scale=${t}>;x.font='9in x';x.fillText(c.style="filter:url(#f)",0,1e3);
u/yonatan

Judging by the sound of my fan, I'm guessing filters use SIMD
u/yonatan

or maybe just if they can't find a working GPU
u/yonatan

firefox seems to handle this one better than chrome

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