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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ellisk1

remix of d/9453 by u/ellisk1

function u(t) {

t?X=Math.random()*2400-99:Y=0;x.fillStyle=`hsla(${3*t+X/9*C(q=t/50)+Y/5*S(q)},80%,50%,.04)`;x.beginPath();x.arc(X,Y,200,0,7);x.fill();Y=X/2

Aug 27 2018 10:47 PM UTC

}// 139/140

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Slowly shifting gradient v2

u/Xen

very nice style
u/aleamb

stylish!
u/magna

#waitforit
u/ellisk1

Thanks! Yeah it does take some time to get going ha

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katkip

remix of d/9552 by u/katkip

function u(t) {

c.width=100;p=0;for(i=0;i<100;i++)for(j=0;j<100;j++)x.fillStyle=`hsl(${C(i)*C(j)*p*t/26},99%,50%)`,x.fillRect(i,j,1,1),p++

Aug 30 2018 9:37 AM UTC

}// 122/140

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1n^3 8 #fractal

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c499

remix of d/3760 by u/sadropol

function u(t) {

c.width|=0;for(i=1;i<3000;i++){b=1*t+i;o=200-(S(b+5)*126)%256;x.fillStyle=(0,o,0,1);x.fillRect(940+((i/2)%3)*S(b)*200,0+i*6%11850,8,8);}

Aug 31 2018 8:42 AM UTC

}// 137/140

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BalintCsala

function u(t) {

with(x)t?k-=.1:arc(0,0,370,0,7,translate(960,540,k=2,fillStyle="#080")),font="8em A",k<0&&rotate(.314,k=2),fill(fillText("🌳",-70,k*50-395))

Aug 27 2018 8:05 PM UTC

}// 139/140

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u/Xen

love it
u/katkip

haha nice
u/katkip

arc(0,0,285 looks better for a mini-planet
u/joeytwiddle

Remix: https://codegolf.tk/a/282

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atgz

remix of d/9444 by u/DataMeta

function u(t) {

v=Math.abs;for(c.width|=i=360;i--;)x.ellipse(960+C(t)*64,b=540,b*.618*v(C(t-i)),b*v(S(C(t)+i--)),-t+i,-t,7);x.stroke();

Aug 28 2018 3:02 PM UTC

}// 120/140

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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