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/9423 by u/katkip

function u(t) {

if(!t){l=0;r=-1}while(l<22){x.fillStyle=`hsl(${S(r*l*t/100)*100},99%,50%)`;x.fillRect(++r*50,l*50,50,50);if(r>38){l++;r=-1}}l=0

Aug 25 2018 12:05 PM UTC

}// 127/140

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katkip

function u(t) {

x.arc(960,540,40*+Math.abs(T(t)*t),t*t,t);x.fill()
x.globalCompositeOperation='xor';FPS=200

Aug 25 2018 11:33 AM UTC

}// 91/140

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Visual #illusion . Fullscreen and look in the center then look in the middle for 1 minute then look away. See that lines? lol

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katkip

remix of d/9394 by u/Xen

function u(t) {

for(i=2e3;i--;x.fillStyle=`hsla(${C(i*2+t)*2e3},80%,60%,.1)`)
x.fillRect(C(i+t)*2e3,0,25,25);x.drawImage(c,0,5);x.rotate(C(t)/3e3)

Aug 24 2018 9:30 AM UTC

}// 130/140

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BirdsTweetCodersDweet

remix of d/9314 by u/Xen

function u(t) {

for(i=2e3;i--;x.fillStyle=`hsla(${i^5*frame%2e3},100%,50%,1)`)x.fillRect(i,0,5,50);x.drawImage(c,0,5)

Aug 22 2018 12:53 PM UTC

}// 101/140

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Colourful tile generator

u/firegodjr

delicious

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cantelope

function u(t) {

eval(unescape(escape`景爨椽眽⡣⹷楤瑨簽〩⼲㭩ⴭ㭸⹢敧楮偡瑨⡸⹬楮敗楤瑨㴲⭨⽚⽚ⱸ⹳瑲潫攨⤩⥛ㄵⰰⰱ崮浡瀨欽㹻朽椭欬砮汩湥呯⡷⭓⡱㵧⼨栽ㄵ㈮㠩⭴⼳⤪⡚㵃⡰㵧⼲⸳㠷㌫琩⬴⭓⡴⤩⼨娽䌨焩⩚ⴹ⤪眬⡓⡰⤭㌩⽚⩷⥽⤻`.replace(/u(..)/g,"$1%")))

Aug 23 2018 2:52 AM UTC

}// 140/140

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veubeke

function u(t) {

for(a=c.width|=0;a--;x.restore(x.fillRect(-32,-32,64,64)))x.save(x.globalCompositeOperation='xor'),x.translate(a%32<<6,a/32<<6),x.rotate(t)

Aug 21 2018 9:13 PM UTC

}// 139/140

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u/Xen

love It!

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f8f82804

function u(t) {

eval(unescape(escape`䜽⡡Ɫ⤽㹢㽇⡢ⱡ╢⤺愻䰽⡡Ɫ⤽㹡⩢⽇⡡Ɫ⤻瀽⡩㴳㤪䵡瑨⹲慮摯洨⥼〩⩩⭩⬴ㄻ焽⬫椪椫椫㐱㭮㵰⩱㭥㴶㔵㌷㭦潲⡤㴱㭤⩥╌⡰ⴱⱱⴱ⤭ㄻ搫⬩㭣㴷㭦潲⠻ⴭ攻挽挪㜥温㭃㵣㭦潲⠻ⴭ搻䌽䌪挥温㭴桲潷⁃`.replace(/u(..)/g,"$1%")))

Aug 24 2018 7:30 PM UTC

}// 139/140

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RSA #crypto #compressed

u/f8f82804

G=(a,b)=>b?G(b,a%b):a;L=(a,b)=>a*b/G(a,b);p=(i=39*Math.random()|0)*i+i+41;q=++i*i+i+41;n=p*q;e=65537;for(d=1;d*e%L(p-1,q-1)-1;d++);c=7;for(;--e;c=c*7%n);C=c;for(;--d;C=C*c%n);throw C
u/f8f82804

Will throw 7 if the decryption works correctly. #slow
u/katkip

it lags so much
u/f8f82804

it should be possible to optimize the modular inversion and exponentiation, but it would probably go over the character limit

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f8f82804

remix of d/9416 by u/katkip

function u(t) {

with(x)drawImage(c,-16,-10.2,1952,1100),fillStyle=`hsl(${t<<5} 99%50%`,font='15em a',t%1>.01||fillText(s=t|0,960-measureText(s).width/2,638)

Aug 25 2018 6:33 PM UTC

}// 140/140

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Xen

remix of d/9403 by u/katkip

function u(t) {

for(i=2e3;i--;x.fillStyle=`hsla(${C(i*9+t)*5e2+t*t},80%,60%,.1)`)
x.fillRect(C(i-t/3)*2e3,0,29,9);x.drawImage(c,5,5);x.rotate(C(t)/3e3*T(t))

Aug 24 2018 6:23 PM UTC

}// 140/140

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katkip

function u(t) {

function d(q,w,e,r){x.beginPath();x.moveTo(q,w);x.lineTo(e,r);x.stroke();}for(i=0;i<2000;i++)d(C(i/3)*1920,S(i)*1080,S(i)*1920,T(i*5)*1080)

Aug 24 2018 4:01 PM UTC

}// 139/140

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