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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djjeck

function u(t) {

f=v=>x.fillStyle=v
r=_=>Math.random()*255
x.fill(x.arc(r()*8,r()*5,70,0,7,x.beginPath(f(R(r(),r(),r())))))

Mar 1 2017 10:56 PM UTC

}// 106/140

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hamptonio

remix of d/1660 by u/hamptonio

function u(t) {

t?i++:i=0;for(j=2e3;j--;){a=j/1e3-2;b=i/2e3-.25;for(k=12;k--;){q=a*a+b*b;q*=q;c=2*a+(a*a-b*b)/q;b*=2*(1-a/q)/3;a=c/3}x.fillRect(j,i,1,S(a))}

Mar 1 2017 10:21 PM UTC

}// 140/140

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Thanks to iverjo for the speedup from #1660.

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AaronGiles

function u(t) {

c.width|=0;for(i=0;i<256;i+=.25)s=S(t+i),o=C(t-1.1*i),x.fillStyle=R(i,255-i,0,i/255),x.fillRect(800+i+s*800,400+i+o*400,10,10)

Mar 2 2017 8:02 AM UTC

}// 126/140

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hamptonio

function u(t) {

w=c.width=128;for(i=2;i<w*w;i++){s=i;for(k=0;s>1;k++){s=s%2?3*s+1:s/2};x.fillStyle=`hsl(${k*.9},80%,${k/3}%)`;x.fillRect(i%w,i/w|0,1,1);}

Mar 1 2017 9:38 PM UTC

}// 137/140

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Visualization of Collatz sequences: https://en.wikipedia.org/wiki/Collatz_conjec…

u/taupelink

#collatz
u/taupelink

Dwitter engine may have been updated since this dweet was posted...you can add "if(!t)" at the beginning although that bumps it up past 140 characters...
u/taupelink

#collatz

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hamptonio

remix of d/1763 by u/New_Core

function u(t) {

if(!t)a=new(window.AudioContext)(),o=a.createOscillator(),o.connect(a.destination),o.start(a);o.detune.value=220*S(t+S(t*t))

Mar 2 2017 9:26 PM UTC

}// 124/140

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Remove "a" from "o.start(a)" to begin the annoyance. This golfing tweak to New_Core's should allow for more complexity to be added...

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u/iverjo

116 characters: if(!t)a=new(AudioContext)(),o=a.createOscillator(),o.connect(a.destination),o.start();o.detune.value=220*S(t+S(t*t))
u/iverjo

115 characters: t||(a=new(AudioContext)(),o=a.createOscillator(),o.connect(a.destination),o.start());o.detune.value=220*S(t+S(t*t))
u/iverjo

Room for 25 more characters of fun! :D
u/hamptonio

if(!t){a=new(AudioContext)();o=[];for(i=6;i--;){q=o[i]=a.createOscillator();q.connect(a.destination);q.start()}}o[t%6|0].detune.value+=S(t)
u/hamptonio

multivoice above
u/iverjo

#audio

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sfacci

function u(t) {

l=c.width|=0;h=540;x.translate(l/2,h);for(i=0;i<9;i++){a=l*i/18;b=h*i/9;x.fillRect(a*S(t),b*C(t),15,15);x.ellipse(0,0,a,b,0,0,7);x.stroke()}

Mar 3 2017 9:20 PM UTC

}// 140/140

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syzygy

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AaronGiles

function u(t) {

c.width|=0;x.fillStyle='green';x.font='60px Arial';for(y=0;y<27;y++)for(z=0;z<64;z++)x.fillText(Math.random()*10|0,z*30,y*41);

Mar 2 2017 6:56 AM UTC

}// 127/140

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TheTarquin

function u(t) {

f=x.fillRect.bind(x)
x.font = "96px sans"
x.fillText("🎩",830,200)
f(999,300,50,200)
f(750,300,50,200)
f(700,600,400,50)

Mar 2 2017 6:37 AM UTC

}// 119/140

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magna

function u(t) {

(function u(t){
c.width=1920;x.font='38px Menlo,Consolas';
`(${u})(t)`.split('\n').forEach((s,i)=>x.fillText(s,0,++i*45+(C(t)+1)*666))
})(t)

Feb 27 2017 4:58 AM UTC

}// 140/140

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Quine

Show more comments…
u/Kalanchoe

Haha, clever!
u/vonzo

wut?
u/sfz

<3
u/jczimm

nice!
u/highfestiva

wtf! :)
u/magna

#quine

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AaronGiles

function u(t) {

c.width|=0;w=960;h=540;for(z=0;z<6.28;z+=0.05)i=S(t)*S(t)*7,s=S(t-z),o=C(t+z),x.fillRect(w+(w-70*i)*s,h+(h*s-50*i)*o,15,15)

Mar 2 2017 5:56 AM UTC

}// 123/140

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