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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Xen

remix of d/9484 by u/f8f82804

function u(t) {

if(t%1<.01)with(o=(a=new AudioContext).createOscillator())connect(a.destination),start(),stop(a.currentTime+1);o.frequency.value=99*S(t*9&t)

Aug 27 2018 9:11 PM UTC

}// 140/140

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little song for you :-P

u/joeytwiddle

Funky!
u/Xen

#audio #sound

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f8f82804

remix of d/9568 by u/f8f82804

function u(t) {

z=32;for(U=V=z*S(t/4),i=z*z;i--;x.fillRect(i%z*z+448,j*z,z,z))V+=j=i/z%z|0,U+=i%z+j/z,x.fillStyle=R(U>z?(U-=z,255):0,0,V>z?(V-=z,255):0)

Aug 30 2018 11:23 PM UTC

}// 136/140

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#dithering #animated

u/katkip

Looks cool!

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f8f82804

remix of d/9542 by u/f8f82804

function u(t) {

z=256;for(i=z*z;i--;x.fillRect(i%z*4+448,j*4,4,4))b=t&1||(U=V=0),U+=i%z,V+=j=i/z%z|0,x.fillStyle=R(b?U>z?(U-=z,z):0:U,0,b?V>z?(V-=z,z):0:V)

Aug 30 2018 11:01 PM UTC

}// 139/140

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2D palette and approximation with 4 color #dithering; 1D error diffusion gives different patterns for vertical gradients (red channel) and horizonal (blue channel) #slow #waitforit

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Xen

remix of d/9514 by u/prplz

function u(t) {

x.setTransform(C(Z=t%9)+1,S(t),C(t),S(Z)+1,960,540)
x.rotate(t+C(Z/9)*9)
q=Z*99
q>888?c.width|=0:x.strokeRect(-q,-q,q*2,q*2)

Aug 30 2018 10:51 PM UTC

}// 124/140

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Galaxtone

function u(t) {

eval(unescape(escape`瑼簨瘽嘽礽ㄸⱷ㵗㴮㔩㭯湭潵獥浯癥㵥㴾礽攮礯㤻挮睩摴桼㵡㴳〻硛昽❦楬汒散琧崨㤬礪愬愬㈱〩㭺㴨嘭礭㌩⼳㭚㵺⩺㰱㭷㵶㸶㍼瘼〦娿⵷㩷㭗㵖㹡籖㰰㼭场瘼〦娿稺圻瘽瘼ⴲ㼭愺瘫眻嘫㵗㭸学崨瘪愬嘪愬愬愩`.replace(/u(..)/g,"$1%")))

Aug 27 2018 3:13 AM UTC

}// 140/140

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Just a game of single-player pong!

Show more comments…
u/Galaxtone

Thanks to joeytwiddle & yonatan for golfing this within the limit :P
u/Galaxtone

If you mess up, try adding and removing a semicolon at end or refreshing
u/Galaxtone

High score: 6
u/BalintCsala

#game
u/katkip

#interactive
u/username

actual fuq
u/username

Is there a tool to reformat code into these characters?
u/f8f82804

@username: https://www.dwitter.net/h/compressor
u/katkip

96 Highscore. No life lol
u/username

@f8f82804 thank you
u/lionleaf

Cool! #pong #compressed
u/lionleaf

u/f8f82804 : you can do u/ to mention users
u/f8f82804

u/lionleaf: awesome!
u/Galaxtone

Forget to say, @f8f82804 thanks for the compression tool.
u/Galaxtone

184 bytes

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f8f82804

remix of d/9533 by u/f8f82804

function u(t) {

for(i=22.5;i-->11;)for(j=18;f=--j*S(i^j),j;t||x.strokeRect(-29,-29,58,58))x.setTransform(1,0,0,1,i*60-f,j*60),x.rotate(f*j/99),x.lineWidth=3

Aug 29 2018 8:15 PM UTC

}// 140/140

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A final #art #tribute to _Schotter_ -- Georg Nees, 1968; it trades randomness for heavier lines with antialiasing.

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prplz

function u(t) {

q=t%5*200
x.strokeRect(960-q,540-q,q*2,q*2)

Aug 29 2018 5:26 AM UTC

}// 43/140

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u/katkip

Short and nice
u/Xen

love it

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f8f82804

remix of d/9560 by u/f8f82804

function u(t) {

p=a=>127-C(a)*127;for(i=3;--i;x.fillRect(0,0,960*i,2e3))x.fillStyle=R(p(a=t+i*22),p(a-2),p(a+2))

Aug 30 2018 7:10 PM UTC

}// 96/140

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looping saves another 22 bytes #golf #color #palette

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f8f82804

remix of d/9465 by u/prplz

function u(t) {

let s=128;x.setTransform(1,S(t),C(t),1,960,540);for(Y=p=20;Y--+p;)for(X=q=32;X--+q;x.fillRect(X*s,Y*s,s,s))x.fillStyle=(X+Y)%2?'#000':'tan'

Aug 27 2018 6:44 PM UTC

}// 139/140

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f8f82804

remix of d/9532 by u/f8f82804

function u(t) {

p=a=>127+S(a)*127;with(x)f=a=>fillStyle=R(p(a),p(a+21),p(a-21)),f(t),fillRect(0,0,v=2e3,v),f(t+22),fillRect(960,0,v,v)

Aug 30 2018 6:31 PM UTC

}// 118/140

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Saved 22 characters on my palette with a little golf and some integer approximations for multiples of π. Let me know if you'd like to see the spreadsheet that lays out different approximations and their accuracy.