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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magna

function u(t) {

c.width|=0;for(i=3e3;i--;x.fill())X=i&63,Y=i>>6,x.beginPath(),x.moveTo(a=X*30+Y%2*15,b=Y*30),x.arc(a,b,15,0,3.14*(1+S(t+(X-32)*(Y-18)/99)))

Apr 5 2021 10:47 PM UTC

}// 139/140

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magna

remix of d/22374 by u/magna

function u(t) {

for(i=3e3;i--;x[`${t&1?'clear':'fill'}Rect`](-s/2,-s/2,s,s))X=i&63,Y=i>>6,s=S((X&Y)%t+t)*20,x.setTransform(k=C(A=.79),z=S(A),-z,k,X*30,Y*30)

Apr 6 2021 9:53 PM UTC

}// 140/140

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magna

remix of d/22371 by u/robbyg

function u(t) {

c.width|=0;for(i=3e3;i--;x.fillRect(-s/2,-s/2,s,s))X=i&63,Y=i>>6,s=S(t+(X-32)*(Y-18)/99)*20,x.setTransform(k=C(A=.79),z=S(A),-z,k,X*30,Y*30)

Apr 6 2021 7:09 PM UTC

}// 140/140

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contone

function u(t) {

c.width=1920
for(i=-1;i++<143;)
x.font='2cm"',x.fillText("🐓",X=i%16*120,Y=~~(i/16)*120+100),
x.fillRect(X,Y-100,S(t*30/i)*120,120)

Apr 7 2021 6:04 PM UTC

}// 130/140

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chicken revelations

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robbyg

remix of d/22367 by u/magna

function u(t) {

c.width|=0;for(i=3e3;i--;x.fillRect(X*30+Y%2*15,Y*30,s,s))X=i&63,Y=i>>6,s=S(t+(X-32)*(Y-18)/99)*20

Apr 6 2021 4:59 PM UTC

}// 98/140

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squares for more speed

u/magna

Centered the squares but then also rotated them by PI/4: d/22373

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magna

remix of d/7512 by u/magna

function u(t) {

c.width=960;for(j=60;j--;)for(i=240;i--;x.fillRect(i*4,j*9,4,9))x.fillStyle=`hsl(${120*i},99%,${S(t+(i/3-40)*(j-30)/49+Math.random())*50}%)`

Apr 5 2021 6:11 AM UTC

}// 140/140

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noisy waves on a #crt

u/ciaccodavide

nice

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magna

function u(t) {

eval(unescape(escape`猽獴慴献摯洮晩牳瑃桩汤㭷㵳⹷楤瑨⼱㈸㭩㵦牡浥ⴱ㭘㵩┱㈸⬮㔻夽⡩㸾㜩⬮㔻砮扥杩湐慴栨⤻砮慲挨堪ㄵⱙ⨱㔬㘬〬㜩㭳⹧整䍯湴數瑠㉤怮来瑉浡来䑡瑡⡘⩷ⱙ⩷ⰱⰱ⤮摡瑡嬱嵼籸⹦楬氨⤻`.replace(/u(..)/g,"$1%")))

Apr 4 2021 11:52 PM UTC

}// 132/140

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#dotmatrix #stats #slowdraw #waitforit

u/katkip

interesting

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contone

function u(t) {

x.font="9cm'"
x.fillStyle=R(frame%255)
x.globalCompositeOperation='difference'
x.fillText("❥",frame%1e3*2-160,frame%9*160+100)

Apr 5 2021 8:21 PM UTC

}// 126/140

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anak10thn

function u(t) {

c.width=1920
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200)

Apr 6 2021 7:54 AM UTC

}// 71/140

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(x ^ y) % 9

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contone

function u(t) {

x.font='3cm"';x.fillStyle=R(0,0,f=frame)
!t?x.fillRect(0,0,2e3,2e3):x.fillText("🦆",Math.random()*9e3,Y=(f>>1)*10)
x.fillRect(0,Y-20,2e3,9)

Apr 5 2021 2:57 AM UTC

}// 138/140

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ducks lake