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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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joe.m

remix of d/15836 by u/joe.m

function u(t) {

t?0:q=j=4900,d=[-1,99,1,-99]
x.globalCompositeOperation='xor'
j+=u[q]?-1:1
u[q]^=1
q+=d[j%4]%9801
x.fillRect(19*(q/99|0),10*(q%99),18,8)

Sep 28 2019 2:08 PM UTC

}// 136/140

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langton's ant. Chaos becomes order after about 10k iterations, wait for it...

u/joe.m

#emergent #automata
u/KilledByAPixel

Welcome to the #ant club!
u/Xen

nice!

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marquisdegeek

function u(t) {

eval(unescape(escape`󣜽󭌿󣜫󜜺󜌊󩭯󬬨󦜽󡬽󜬵󝜻󛜭󦜻󚝦󫽲󚍘󟝆󞽸󛭦󪝬󫍒󩝣󭌨󦌪󞌬󦜪󝜬󞌬󝜩󛌭󛝘󞼩󒭦󫽲󚍣󟜰󛍄󟜹󞼡󨼻󚼫󡌩󭬽󦌭󡌬󮌮󩭩󫍬󤽴󮝬󩜽󨼽󭬼󜌿󒬨󚌨󦜪󡌦󡬩󚽙󚽘󙭆󚜽󟜰󚜿󤬨󡬬󡬬󡬩󞭒󚍃󛍙󛍙󚜊󞬨󢼽󚍙󚭄󟬾󞍼󭬪󡌾󟬸󚜦󡌫󣜬󢼦󜜶󟽒󚍋󚬽󝌬󢼬󢼩󞬰󚜊`.replace(/u../g,'')))

Feb 23 2025 11:58 AM UTC

}// 139/140

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No credit to me. This is simply a golf'd version of "Starpath" by HellMood / Desire. https://demozoo.org/productions/367702/

u/marquisdegeek

I suddenly realised why my dwitter version ran slower than the one I wrote in my staging environment, and fixed it!
u/marquisdegeek

I suddenly realised why my dwitter version ran slower than the one I wrote in my staging environment, and fixed it!
u/marquisdegeek

https://www.dwitter.net/d/33418

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ciaccodavide

remix of d/24204 by u/ciaccodavide

function u(t) {

for(c.width=w=64,i=0;i<w*w;i++)x.fillRect(X=i%w,y=~~(i/w),(1+S(.1*(k='偲偲偲偲偲ᜈᜈ䭲䭲ĉ䯨埶䔋ᐮᐮჽჽჽჽჽჽᐮᐮ䔋埶䯨ĉ䭲䭲ᜈᜈ偲偲偲偲偲'.charCodeAt(y)+X)+C(k)*t))/2,1)

Oct 22 2021 5:01 PM UTC

}// 140/140

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rodrigo.siqueira

remix of d/25376 by u/rodrigo.siqueira

function u(t) {

f=(x,y,n=3)=>y<Math.random()*X-x?f(x*x-y*y+.3,3*x*S(y),n+1):S(n/5)**2
for(i=2e4;i--;x.fillRect(X=u&2047,u>>11,f(X/990-1,u/2e6-1.1),1))u=-~u

Apr 27 2022 8:03 PM UTC

}// 139/140

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Electric #fractal with rays and bifurcations #bifurcation

u/magna

wow!
u/pavel

Brainy!
u/rep_movsd

Galaxy brain

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veubeke

function u(t) {

for(c.width^=$=384;$--;x.fill())for(x.beginPath(),i=6;i--;x.lineTo(C(_=i/3*Math.PI)*A*25+$%32*88,S(_)*A*25+$%2*50+($>>5)*99))A=1+S(t*t%$/20)

Jan 28 2018 9:09 AM UTC

}// 140/140

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See also d/6564

u/veubeke

See also d/6564
u/veubeke

See also d/6565 (pro tip: don’t try to comment when your kid is near the keyboard -.-)

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TC5550

function u(t) {

if(!t){for(q=c.width=300,i=5e4;i--;){for(a=y=n=0;a*a+y*y<4&&n<50;n++)ö=a*a-y*y+i%q/99-2,y=2*a*y+i/2e4-1,a=ö;x.fillRect(i%q,i/q>>0,9/n,9/n)}}

Oct 7 2019 11:56 AM UTC

}// 140/140

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Mandelbrot set

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jet

remix of d/16973 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=c.width=960,i);i--;x.fillText("●",480+i*C(a)/4,i*.6))k=i%2,x.fillStyle=R(k*i,!k*i,0,.6+S(a=i/20+3*k-(t))/2)

Dec 26 2019 11:48 AM UTC

}// 128/140

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u/Xen

128 + sexy, nice first indeed!
u/rodrigo.siqueira

#christmas #tree

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metamero

function u(t) {

𣐮=new TextEncoder('utf-16').encode(code)[l='length']
𪁲=code[l]
𩰮=Array.from(code)[l]
throw 𣐮+'B ⇄'+𪁲+' units ⇄'+𩰮+' chars\n🐢💩'+'௸'[l]+'𣐮'[l]

Jan 18 2019 1:51 PM UTC

}// 140/140

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i'm a newcomer, but codegolf community must decide whether they like to count code size in UTF-16 characters, UTF-16 code units or bytes (or bits, since b and B are different units)

Show more comments…
u/metamero

#bug
u/f8f82804

I'm personally against exploiting a bug, so I prefer counting 16-bit chars.
u/metamero

u/f8f82804 unicode chars can be 16 or 32-bit (only). this bug is on front, not on server. or stated other way, this bug is on codegolf community policies.
u/metamero

speaking about bugs, this code actually counts UTF-8 chars (as they are represented in the page/editor). one can see this matter with the ௸ symbol (it's 2B long in UTF-16 but 3B in UTF-8). parameter 'utf-16' in TextEncoder is obsolete, see this note here https://developer.mozilla.org/en-US/docs/Web…
u/metamero

d/11906 is my method to count UTF-16 chars
u/metamero

*** this code actually counts bytes of the string encoded with UTF-8 (html context). d/11906 counts bytes of the string encoded with UTF-16 (javascript context). both count Unicode chars (or *code points*) right with Array.from(code).length. this is different from counting *code units* (16-bit unsigned elements).

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Xen

remix of d/20880 by u/pavel

function u(t) {

p=n=>60*n+(37*n-20)*Math.asin(S(16*t/n))
x.fillStyle=`hsl(${p(t*t)},50%,50%,.1)`
x.beginPath(x.fill(x.arc(p(16),p(9),40,0,t)))

Dec 1 2020 12:48 AM UTC

}// 126/140

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bathroom tile remix

u/Xen

#waitforit

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cantelope

function u(t) {

c.width^=f=1.06;for(i=10;p=2.093*i+f,i--;)x.lineTo(940+S(p)*(s=i<5?340:700),720+C(p)*s),i%5||(x.fill(),x.fillStyle="#fff",x.beginPath(),f=0)

Mar 31 2017 5:13 AM UTC

}// 140/140

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A triforce.

u/cantelope

I'd love to see someone else's attempt at this. Feel like I did it the hard way :s
u/sigveseb

Maybe there is a Unicode triangle you can use?
u/cantelope

@sigveseb, I would worry about subtle variations in display size/position across browsers. but that's a great idea.
u/donbright

im thinking maybe some kind of sierpinski style but it wont be easy