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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dogspace

remix of d/10262 by u/E-Mouse

function u(t) {

for(i=2e3;i--;x.fillStyle=R(C(t)*128+128,0,S(i)*128+128,.07))x.fillRect(960+S(p=i/314)*(d=250+T(p*3+t)*(T(t)*99)*T(t)*1),540+C(i)*d,9,9)

Oct 6 2018 6:03 PM UTC

}// 136/140

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katkip

remix of d/5989 by u/sandromiccoli

function u(t) {

c.width=2e3;x.globalCompositeOperation='xor';for(i=99*t|0;i--;){a=i*4;x.beginPath();x.arc(960+C(a+t)*300,540+S(a+t)*300,300,3,9);x.fill()}

Oct 7 2018 11:34 AM UTC

}// 138/140

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It's fun to watch. #xor

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Agnes

function u(t) {

for(c.width|=J=j=1+t|0;j--;)for(k=J;k--;)for(W=1920/J,H=1080/J,i=9;i--;)x.fillRect(j*W+W/5+i*W/20+S(j+k+t)*W/2,k*H+H/3,H/40,W/10)

Oct 7 2018 9:27 AM UTC

}// 129/140

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Galaxy of defaults #default

u/katkip

Haha cool!
u/joeytwiddle

:-D
u/donbright

hee hee!!

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f8f82804

function u(t) {

with(x)for(globalCompositeOperation='color',s=192,i=9;shadowBlur=i*i--;fillRect(864+s*S(t),444+s*C(t*3),s,s))shadowColor=`hsl(${t*s} 85%45%`

Oct 8 2018 7:54 PM UTC

}// 140/140

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#composite #glow #color

u/donbright

fascinating effect

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Xen

function u(t) {

for(c.width=Z=369,i=99,x.globalCompositeOperation=`xor`;i--;x.rotate(C(t/29)))x.fillRect(Z/5,Z/5,Z,Z)

Oct 7 2018 10:20 PM UTC

}// 101/140

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katkip

function u(t) {

c.width^=0;x.translate(960,540);for(i=-10;i++<10;)
x.lineTo(0,i*40),
x.rotate(C(t+i)),
x.lineWidth=20,
x.stroke()

Oct 5 2018 9:47 AM UTC

}// 113/140

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#abstract thing.

u/joeytwiddle

Looks like half of Batman's batsignal
u/DataMeta

Funky organism
u/BirdsTweetCodersDweet

Looks like a wrench to me, inside some sort of half-hexagon...

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geb

function u(t) {

for(i=c.width=420;i--;x.fillText('†',99*(i?2+S(i%i**i):1),99*(i?2+S(t-i%t/9):3)));(font='0cm a',globalCompositeOperation='source-atop')

Oct 9 2018 9:34 PM UTC

}// 135/140

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remix of https://www.dwitter.net/d/10293

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Purpzie

remix of d/10234 by u/Purpzie

function u(t) {

for(a=0,F=[b=1,1];a++-20;)F.push(b+=F[a-b])
x.font='99px"'
x.fillText(F.join(' '),0,500)

Oct 8 2018 5:04 PM UTC

}// 88/140

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Even shorter, it's 43 characters now (the top line only). Output is the array F.

u/yonatan

for(a=0,F=[b=1,1];a++-20;)F[a+1]=b+=F[a-b]
u/Purpzie

Oh, thank you! That's even shorter

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f8f82804

remix of d/10286 by u/f8f82804

function u(t) {

with(x)for(R=a=>Math.random()*a,X=R(1920),Y=R(1080),i=12;shadowBlur=i*i--;fillRect(X,Y,99,99))fillStyle=shadowColor=`hsl(${t}turn 85%45%`

Oct 9 2018 4:43 PM UTC

}// 137/140

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katkip

remix of d/10262 by u/E-Mouse

function u(t) {

for(i=2e3;i--;x.fillStyle=R(S(t*p)*128+128,C(i*t)*128+128,0))
x.fillRect(960+T(p=i/314+t)*(d=450+S(p*p)*C(i*p)),540+T(p+i/d+t*i/999)*d,9,9)

Oct 6 2018 1:51 PM UTC

}// 139/140

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u/donbright

yay for Tan()