Dwitter - javascript demos in 140 characters

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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katkip

remix of d/13587 by u/katkip

function u(t) {

T.valueOf=Math.random;if(!t)for(c=[i=99];i--;c.push([T*2e3,T*1e3,T*6]));c.map(q=>x.fillRect(q[0]+=C(q[2]+=T-.5),q[1]+=S(q[2]),1,1))

May 2 2019 10:01 AM UTC

}// 131/140

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Thx to u/prplz for golfing

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username

function u(t) {

eval(unescape(escape`𭀪🐹𒡸𛡦𫱮𭀽𨀹𩑭𙱠𒡸𛡧𫁯𨡡𫁁𫁰𪁡🐱𒡸𛡦𪑬𫁓𭁹𫁥🐧𨡬𨑣𪰧𒡦𫱲𚁟🐱𞀻𧰭𛐻𚑦𫱲𚀤🐳𜠻𙀭𛐻𚑸𛡦𪑬𫁔𩑸𭀨𙰮𙰬𙀪𝠰𚠨𚁴𚱟𚐥𜐸𚐬𝀵𚱟𚠶𜀪𚀨𭀫𙀩𙐳𜠩𚐊𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠲𒡸𛡦𪑬𫁓𭁹𫁥🐧𭱨𪑴𩐧𒡸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𜡥𜰬𜡥𜰩`.replace(/u../g,'')))

May 2 2019 9:16 AM UTC

}// 140/140

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cannon

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KilledByAPixel

function u(t) {

eval(unescape(escape`潮捬楣欽攽㹻挮昦♣⹦⹳瑯瀨⤻堽湥眠䅵摩潃潮瑥硴㭣⹦㵦㵘⹣牥慴敂畦晥牓潵牣攨⤻栽⡦⹢畦晥爽堮捲敡瑥䉵晦敲⠱ⰱ攷ⰱ攵⤩⹧整䍨慮湥汄慴愨〩㭨⹳整⡨⹭慰⡚⤩㭦⹣潮湥捴⡘⹤敳瑩湡瑩潮⤻昮獴慲琨⥽`.replace(/u(..)/g,"$1%")))

May 2 2019 8:16 AM UTC

}// 140/140

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Bytebeat Music Player - Write a function of the form Z=(_,t)=>( ) above the eval then click the canvas to play bytebeat music! For example: Z=(_,t)=>(t*((t>>12|t>>8)&633&t>>4));

Show more comments…
u/KilledByAPixel

You can change the code and click the canvas to restart with a new song!
u/KilledByAPixel

Here are some examples from https://github.com/kragen/viznut-music
u/KilledByAPixel

Z=(_,t)=>(t*(t>>11&t>>8&123*t>>3));
u/KilledByAPixel

Z=(_,t)=>((-t&4095)*(255&t*(t&t>>13))>>12)+(127&t*(234&t>>8&t>>3)>>(3&t>>14));
u/KilledByAPixel

Z=(_,t)=>(t*(t>>8*(t>>15|t>>8)&(20|(t>>19)*5>>t|t>>3)));
u/KilledByAPixel

Post your creations below!
u/metamero

#tool #application #sound
u/KilledByAPixel

This page has a ton and most of them work great! https://www.reddit.com/r/bytebeat/comments/2…
u/KilledByAPixel

Z=(_,t)=>((t>>8&t)*(t>>3&t));
u/KilledByAPixel

Z=(_,t)=>((t%211&t)-(t>>9&t)+(t>>7&t)); // heavy
u/KilledByAPixel

I made a YouTube video with 3 of my faves... https://www.youtube.com/watch?v=hQ0b8qYoRIE

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vinca

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㴰ⱪ㴷攳㭪ⴭ㬩筦潲⡶慲⁘㵪⼷ぼ〬夽樥㜰Ɱ㵲㴰Ⱪ㵓⡴⤻渼ㄹ☦爪爫椪椼㐻渫⬩愽爪爭椪椫⡘ⴷ〩⼲㔬戽㈪爪椫⡙ⴳ㔩⼳㔬爽愬椽戻砮牥捴⠲攳⩘⼱〰ⰱ攳⩙⼷〬㌪測㌪温絸⹳瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Apr 30 2019 2:11 PM UTC

}// 136/140

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u/Jezza

Wow!
u/13thptr

#mandelbrot

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Jezza

remix of d/13541 by u/username

function u(t) {

c.width|=0
x.font=`16em'`
for(_=3;_--;)for($=8;$--;)x.fillText(String.fromCodePoint(128e3+_+$+t^0),$*(w=300)-(t*w)%w,w+_*w)

May 1 2019 12:24 AM UTC

}// 124/140

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"What sort of menagerie do you imagine I'm imagining?" - David Mitchell

u/katkip

Noah
u/joeytwiddle

#emoji #animals

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username

remix of d/13546 by u/username

function u(t) {

x.font=`3em'`
for(_=18;_--;)for($=32;$--;)x.fillText(String.fromCodePoint(128336+(_+$+t*18^0)%24),$*60,99+_*60)

Apr 30 2019 5:44 PM UTC

}// 111/140

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time in 111 bytes

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rodrigo.siqueira

remix of d/13523 by u/Jezza

function u(t) {

x.globalAlpha=.3;x.beginPath()
if(t<63)for(i=9,j=.1,X=960,k=Y=540;k/=2,i--;j*=-9)
X+=C(f=t*j*2)*k,
Y+=S(f)*k,
x.lineTo(X,Y)
x.stroke()

May 1 2019 3:07 PM UTC

}// 134/140

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Tenfold #epicycles #fractal #spirograph

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rodrigo.siqueira

remix of d/13591 by u/rodrigo.siqueira

function u(t) {

x.beginPath(x.globalAlpha=.1)
if(t<125.66)for(i=9,j=.1,X=960,k=Y=598;k/=2,i--;j*=-4)X+=S(f=t*(j+.1))*k,Y-=C(f)*k,x.lineTo(X,Y);x.stroke()

May 2 2019 12:50 PM UTC

}// 137/140

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Pentagon of Pentagons #epicycles #fractal #spirograph

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Jezza

function u(t) {

for(i=9,j=.1,X=960,k=Y=540;k/=2,i--;j*=-3)X+=C(t*j)*k,Y+=S(t*j)*k,x.fillRect(X,Y,1,1)

Apr 29 2019 2:38 AM UTC

}// 85/140

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#epicycles #notstrictlyepicycles

u/vinca

Beautiful and minimal code.
u/artfarnaa

Agree, well done.
u/katkip

WTF! You published a #fractal #spirograph with 5 minutes before me! I was gonna create the exact same ideea. Wow

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rodrigo.siqueira

remix of d/13573 by u/rodrigo.siqueira

function u(t) {

x.beginPath(x.globalAlpha=.1)
if(t<62.83)for(i=9,j=.1,X=960,k=Y=1350;k/=2,i--;j*=-3)X+=S(f=2*t*(j-.1))*k,Y-=C(f)*k,x.lineTo(X,Y);x.stroke()

May 2 2019 11:57 AM UTC

}// 139/140

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The Eye of Providence

u/katkip

God