Random dweets | Dwitter

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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hamptonio

function u(t) {

c.width=1920;for(i=0;i<1024;i++){var y=540*(1+S((60-t/60)*i/20));var q=960*(1+C(t*i/1200));x.fillStyle=R(i%4,q,i);x.fillRect(q,y,20,20);}

Feb 23 2017 9:15 PM UTC

}// 137/140

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u/cagr30

Super

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nystrand

function u(t) {

for(i=w=3e3,a=b=g=333*T(t%9/7);j=(i^a*a)%4,i--;x.fillRect(a+=g+C(j*5+t)*g-a/2-w+g,b+=g+S(j*9+t)*g-b/2-w,s,s),w=2)x.fillStyle=R(s=w*9,w,s,.1)

Dec 28 2017 2:50 PM UTC

}// 140/140

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Show more comments…
u/sigveseb

This one is fantastic! Good job indeed
u/Bendoman

Brilliant!
u/Xen

very very impressive!
u/magna

HOW ON EARTH
u/nic

MIND:=BLOWN
u/lowpoly

Gawd, I learnt a lot today
u/Citiral

Since when does Javascript support black magic?
u/sigveseb

Needs more upvotes!
u/doof

this was such a delight to unpack :)
u/Lazy1337

wow
u/aleamb

amazing
u/iverjo

I'm awestruck
u/xem

unbelievable
u/trapkid

lol
u/aleamb

epic! one of the greatest dwitter
u/ThreeNPlusOne

sierpinski triangle :D
u/xem

It'd be nice to have a blog post explaining it :) (please?)
u/trupples

I didn't look much into it but it might have to do with a thing I read about once where if you have a point that "walks" half the distance towards a random corner of a triangle you'll end up drawing a sierpinski triangle sorta like you can see in https://www.dwitter.net/d/5097
u/trupples

And according to http://distrustsimplicity.net/articles/sierp… if you were to use 4 points instead of 3 you'd get a tetrahedron like in this dweet. Fascinating stuff
u/stiaje

#witchcraft
u/lionleaf

#top_of_the_year
u/Scaledish

wow
u/Tekmap

👏👏👏👏👏
u/vain

that's not from this world! incredible code / 3d fx and blur
u/rodrigo.siqueira

3D flying #sierpinski pyramid #fractal
u/ximavus

dude has almost 300 likes!
u/ximavus

u/Citiral since ECMAScript 666 lol

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rodrigo.siqueira

remix of d/18445 by u/pavel

function u(t) {

for(X=f=c=>C(T(4*c/d)),Y=t/8-1.1,i=2e3;i--;x.fillRect(i,t*60,(1+f(X=i/480-2)*f(Y))/2,3))x.fillStyle=R(S(Y)*99,0,C(r=X*X+Y*Y)*99),d=r<0||S(r)

Apr 25 2020 6:31 PM UTC

}// 140/140

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Towards Infinity (Escher-like tilings) mirror #sphere #raytracing

u/KilledByAPixel

👍
u/joeytwiddle

#shiny

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SockTaters

remix of d/35460 by u/SockTaters

function u(t) {

p="⛳񁩵򌘮󿺇񯸆񀘇񄾕񄸅񏐦󆤭󦫶񄱥󈓔󄔥򼺆󊜂󇔛𹸅󗴥󇋣󹳥𾾕񇭅󄋳򝚅򩭽󥼌󄣩𐸥󍓼𿸄񌋽򧻫񅳃󜶌󛣢񍓛񍔡󐋢󣓃󰣕󷍪񪡴򜚍󊋓󛜍󏌡󻴬󐌙򃜭".codePointAt(t*9|1)
x.fillStyle=R(b=p>>12)
x.fillRect(p&504,b*8&504,4<<p%8,4<<p/512%8)

Jun 12 2026 4:26 PM UTC

}// 140/140

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rectangle painting of "Dr Pozzi at Home" (1881)

u/SockTaters

Reuploaded because of a typo (p&511 → p&504)
u/SockTaters

Alternatively, "Reuploaded to fix Dr Pozzi's broken nose"

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danny@hille.dk

remix of d/21883 by u/BackendForth

function u(t) {

c.onmousemove=e=>{for(i=c.width|=0;i-=64;)for(j=1080;j-=54;)X=e.x/.3-i,Y=e.y/.3-j,r=(X*X+Y*Y)**.4/56,x.fillRect(i-X/r,j-Y/r,r*9,r*9)}

Mar 10 2021 6:52 PM UTC

}// 133/140

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golf and play

u/BackendForth

Nice! I'll keep the |= operator in mind for next time.
u/danny@hille.dk

#interactive #mouse

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taupelink

remix of d/35576 by u/taupelink

function u(t) {

eval(unescape(escape`景爨椽稽㙥㌻椭ⴻ砮晩汬剥捴⡩⨪⠮㤫匨琩⼹㤩ⰳ攳⼨琫㈮㤩ⴹ〪琬稦㘬㈰⤩砮晩汬却祬攽刨爽㌰〭⡺☽ㄵ⤪⨲⼮㠬爬爬稯爩Ɒ㴨稯⡲⬸〰⤭ㄩ⨪稬稫㴴⭃⡩⽲⨫⭺⽰⼴㔩ⱺ⼽⸹㠫匨琯⠵⭴⤪瀪稫琯㤩⼵`.replace(/u([^D].)/g,'$1%')))

Jun 11 2026 2:41 PM UTC

}// 140/140

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d/35579

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andrea270872

function u(t) {

c.width|=j=1
for(;j++<15;)for(i=19;i--;x.font=C(t)+6+"em'")x.fillText([...'🏡🌊🌳 '][~~((S((i-~(S(t)*6))*(j+~(C(t)*9))*97)+1)*2)],i*99,j*69)

Mar 20 2019 5:32 PM UTC

}// 137/140

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A map with panning and "zoom"

u/tomxor

oh wow neat! i keep missing these ones cos on chromium linux i get a bunch of tofu - FF is ok though.
u/joeytwiddle

I had a lot of tofu on Ubuntu but then I installed a new Manjaro ;-)
u/tomxor

I'm running minimal a debian, I think it's just missing font packages but can't be bothered to hunt for them. I will try Arch one day when I'm braver :P

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rodrigo.siqueira

remix of d/19459 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,i=2e3,i);i--;)X=S(i**3),Y=C(i+t/3),Z=3*(S(t)*2-X*X-Y*Y),x.clearRect(980+170*(X*C(t/2)-Z*S(t/2)),500-Y*250-Z*C(t)*80,7,7)

Jul 20 2020 3:45 PM UTC

}// 139/140

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Swimming creature

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gravityGobbler

function u(t) {

for(i=c.width=2e3;i--;){j=i%30
x.setTransform(1,0,0,1,i*5,j*50)
x.fillStyle='hsl('+(99*t+i)+',99%,50%)'
x.fillRect(0,0,k=99*S(i+j+t),k)}

Dec 17 2021 10:09 PM UTC

}// 136/140

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SakulTheBadger

remix of d/22198 by u/Pascal

function u(t) {

for(c.width|=i=w=1e3;i--;c.style.filter=`blur(.2vw)contrast(99`)x.lineTo(w+w*(1.5*C(a=i*3+t*t))/(z=S(a)-1),540+w*(2*S(i)**2-1)/z)
x.stroke()

Mar 28 2021 10:02 PM UTC

}// 140/140

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