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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rodrigo.siqueira

function u(t) {

for(c.width^=0,i=9;i--;){r=i*99
x.rotate(C(i+t+T(t/2))/80)
x.fillStyle=R(0,r/9,r/7,0.3)
x.translate(0,0)
x.fillRect(950-r/2,530-r/2,r,r)
}

Nov 26 2018 12:51 AM UTC

}// 138/140

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Tunnel of Squares

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katkip

remix of d/11139 by u/anotherkitten

function u(t) {

x.fillStyle=`hsl(${t*99} 50%${50+50*S(t*99)}%`;x.arc(960,540,t+S(t**5)*t,3+C(t*99)*3,3+S(t*66)*3);x.fill();x.drawImage(c,-72,-40,2064,1160)

Nov 25 2018 10:33 AM UTC

}// 139/140

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Falling in the #illusion #waitforit stare in the middle for few seconds in fullscreen and see what happens

u/joeytwiddle

Yeah that's ... uh ... powerful!

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rodrigo.siqueira

remix of d/11140 by u/jylikangas

function u(t) {

c.width^=0
for(0,X=i=840;i--;)x.fillRect(i*3,X,3,S(i*6.3-t)*57-150)
x.font='2in"';x.fillText('✈',t*40,N=70*S(t)+510),x.fillText('🏎️',N,960)

Nov 25 2018 2:13 PM UTC

}// 139/140

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Airplane flying, car and mountains

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veubeke

function u(t) {

c.width^=0
for(Y=26;Y--;)
for(X=45;X--;)
for(i=3;i--;x[i<2?'lineTo':'moveTo']((_+C(a=t*4+_))*45,(Y+!i-1+S(a))*45))
_=X+i%2-1
x.fill()

Nov 25 2018 4:16 PM UTC

}// 133/140

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metamero

function u(t) {

throw t

Nov 27 2018 9:36 AM UTC

}// 7/140

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throw t

u/katkip

Already done

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anotherkitten

function u(t) {

for(i=27;i--;x.fill(p=new Path2D,p.arc(960,540,i*20+20,0,7)))x.fillStyle=R(p=S(i/(4+C(t)*5))*255||255,p,p);

Nov 28 2018 4:44 AM UTC

}// 107/140

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blackhole donut

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metamero

remix of d/11183 by u/metamero

function u(t) {

t||(c.outerHTML="»<input id=o>«",o.onblur=f=>o.value='metamero:'+o.value+' '+u);
throw(u+'\n\n'+o.value)

Nov 27 2018 9:47 PM UTC

}// 104/140

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uncompressing my brain #2

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metamero

remix of d/9207 by u/MrM@_S

function u(t) {

t||(c.outerHTML="»<input id=o>«",o.onblur=f=>o.value='metamero');
throw(u+'\n\n'+o.value)

Nov 27 2018 9:42 PM UTC

}// 89/140

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uncompressing my brain #1

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pavel

remix of d/9830 by u/joeytwiddle

function u(t) {

for(c.width|=j=22,t%=2;--j;)for(i=8;i--;x.arc(960,540,i&&j>2*p&&70*(j-2*p),a=(i+p)*355/339,a))p=1/(1+2**(j+6-16*t));x.fill('evenodd')

Nov 23 2018 3:16 AM UTC

}// 133/140

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u/joeytwiddle

Golfed with plenty to spare. Fantastic!
u/sigveseb

Oh my
u/iverjo

Yes!
u/pavel

#uncompressed

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metamero

remix of d/9207 by u/MrM@_S

function u(t) {

throw(unescape(escape`瑼簨挮潵瑥版呍䰽⊻㱩湰畴⁩搽漾ꬢⱯ⹯湢汵爽昽㹯⹶慬略㴨甫〩⹳灬楴恜湠嬱崮牥灬慣攨⽛帡⵾崫⼬却物湧⹦牯浃桡牃潤攨⸮⸨漮癡汵攫∻∩⹭慴捨⠯⸮⽧⤮浡瀨攽㹥学㴢捨慲䍯摥䅴≝⠩㰼㡼敛晝⠱⤩⤩⤻`.replace(/u(..)/g,"$1%")))

Nov 27 2018 9:16 PM UTC

}// 140/140

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uncompressing my brain #0