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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danny@hille.dk

function u(t) {

for(c.width=160,K=5;K--;)for(i=9;i--;)x.fillStyle=`hsl(${K*50},70%,${99-Math.abs((i-4)*20)}%)`,x.fillRect(0,9+S(C(t/9)+S(t*2-K))*9+i,1920,1)

Jul 14 2020 9:07 AM UTC

}// 140/140

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C=64 forever!

u/danny@hille.dk

i wantet something like this: for(w=c.width=320,x.fillRect(0,0,w,w),q=5;q--;)for(i=9;i--;)x.fillStyle=hsl(${q*50},70%,${99-Math.abs((i-4)*20)}%),x.fillRect(0,9+S(C(t/9)+S(t*2-q))*9+i,1920,1);x.fillText('I ❤️ C=64',140,18)

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danny@hille.dk

remix of d/19217 by u/bandaloo

function u(t) {

for(i=540;i;x.fillStyle=`hsl(${i*C(t/i--)},99%,${88*(T(S(t*C(t/9)+C(t-i/33))))}%`)x.fillRect(1912,i,8,i<<1);x.drawImage(c,-8,0)

Jul 13 2020 6:28 PM UTC

}// 127/140

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rainbow squiggles

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katkip

function u(t) {

t||(document.body.innerHTML=`<textarea id=q rows=10 cols=60><h1>test</h1></textarea><a id=z></a>`)
setInterval('z.innerHTML=q.value',0)

Jul 12 2020 5:30 PM UTC

}// 136/140

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HTML Editor inside dwitter

u/DataMeta

#interactive

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directmusic

function u(t) {

if(t<6.27){x.fillStyle=R(0,0,0,1)
x.beginPath()
a=S(t)*50
x.arc(T(t*2)*200+960,S(t*2)*300+540,200,0,9.42)
x.stroke()}

Jul 14 2020 3:11 AM UTC

}// 117/140

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Symmetries

function u(t) {

w=960;h=540;v=w+h*C(t);c.width+=0;x.translate(w,h);x.rotate(9*S(t/3));for(i=-9;i<9;i++)for(j=-9;j<9;j++)(i+j)%2||x.fillRect(i*v-w,j*v-h,v,v)

Jul 11 2020 10:56 PM UTC

}// 140/140

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First Dweet

u/joeytwiddle

Nicely done! #rotozoom
u/katkip

#checkerboard

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danny@hille.dk

remix of d/13643 by u/magna

function u(t) {

c.width=w=2e2;with(x){for(q=255,i=25;i--;beginPath(fill(arc(S(t/9+i)*50+100,C(i+t/i)*50+50,10+S(i/3)*5,0,7))))fillStyle=R(200-C(t/i)*80);}

Jul 13 2020 2:28 PM UTC

}// 140/140

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Lavalamp?

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directmusic

remix of d/19411 by u/directmusic

function u(t) {

c.width=300
a=(S(t*5)+1)*127.5
b=(S(t*3)+1)*127.5
c=(S(t*1)+1)*127.5
x.fillStyle=R(a,b,c,1)
x.fillRect(0,(t*30)%168.75,300,1)

Jul 14 2020 4:27 AM UTC

}// 126/140

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gradient

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RedzaMusic

remix of d/19409 by u/directmusic

function u(t) {

if(t<6.27){
x.fillStyle=R(0,0,0,0.05)
x.fillRect(C(t)*99 + 550,S(t)*300+540,800,10)
}

Jul 14 2020 3:43 AM UTC

}// 85/140

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just made this more efficient

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directmusic

function u(t) {

x.globalCompositeOperation="lighter"
if(t<6.27){x.beginPath()
x.arc(T(t/2)*99+960,S(t)*300+540,200,0,9)
x.fillStyle=R(0,0,0,0.005)
x.fill()}

Jul 14 2020 3:32 AM UTC

}// 140/140

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Xen

remix of d/5760 by u/DirtyDan

function u(t) {

for(x.beginPath(i=b=540);i--;x.fillRect(q-4,s-4,9,9),x.strokeStyle=R(q))x.lineTo(q=960+i*C(r=i/b*t*9),s=b+i*S(r));x.stroke()

Jul 13 2020 7:44 PM UTC

}// 124/140

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golf and play