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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taupelink

function u(t) {

r={valueOf:Math.random};x.fillStyle='#'+'F90FF99F354333'.substr(n=r*12|0,3),x.beginPath(x.fill(x.arc(r*2e3,r*1080,8*(n+6),q=n*1.57,q+3.14)))

Aug 27 2019 5:14 PM UTC

}// 140/140

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d/15542

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WasifBoomz

function u(t) {

x.lineTo(640*t,0)
x.lineTo(1280*t,0)
x.lineTo(1600*t,540*t)
x.lineTo(1280*t,1080*t)
x.lineTo(640*t,1080*t)
x.lineTo(340*t,540*t)
x.stroke()

Aug 28 2019 1:46 PM UTC

}// 140/140

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atgz

remix of d/12738 by u/DataMeta

function u(t) {

c=400;for(i=512;i--;)x.fillStyle=R(C(i)*(a=C(t*i--/360))*255,S(i)*a*255,3e4/i),
x.fillRect(960+c*S(t+i/22*7.111),540+c*C(t-i),8,8)

Aug 26 2019 1:29 PM UTC

}// 130/140

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atgz

remix of d/15538 by u/atgz

function u(t) {

c.width|=q=2.9+.005**t;x.translate(960,540);for(i=0;i<329;i++)x.rotate(q+(i%22?0:q/2)),x.fillRect(a=(3+(C(t)*i)/(22+t))%16*45,a,w=a**.75,w)

Aug 28 2019 12:30 PM UTC

}// 139/140

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atgz

remix of d/15545 by u/mildlybean

function u(t) {

c.width|=t/=4;A=a=>960+a(g+i*1.96374)*(g%1*1200);for(i=j=954;i--;)g=t+i/j,x.moveTo(X=A(S),Y=A(C)-420),x.arc(X,Y,6+g%1*33,0,360);x.fill()

Aug 28 2019 11:06 AM UTC

}// 136/140

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rodrigo.siqueira

remix of d/15526 by u/mildlybean

function u(t) {

Z=(X,Y)=>S((Y*Y+X*X)/299+t*9)*9
c.width|=0;for(i=-80;++i<80;)for(j=-50;++j<50;x.fillRect(960+i*d+j,540-(j+h)*d,3,3))d=3e3/(410+(h=Z(i,j)))

Aug 26 2019 8:25 PM UTC

}// 138/140

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Sombrero function. Added +j (in fillRect x coordinate) to add perspective. Changed -64/+64 ("for i" and "for j") to other intervals so it can fit the image better and also removed .7* multiplications to get more space for equation.

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jellyedwards

remix of d/15514 by u/pavel

function u(t) {

with(x)for(c.width|=i=j=t/3|0,translate(960,540);i--;fillRect(-2e3,-2,4e3,2))rotate(q=Math.PI/j),beginPath(fill(arc(S(t+i*q)*500,0,40,0,7)))

Aug 25 2019 5:11 PM UTC

}// 140/140

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Tiny change so it grows over time

u/aleamb

great!

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DataMeta

remix of d/15449 by u/DataMeta

function u(t) {

c.style.background=R();if(t<2)for(i=1920;i--;)x.fillStyle=R(l=S(t)*i/7,l,l),
x.fillRect(i,540+S(C(t+i/64+l/64))*S(t)*i/4,9,9)

Aug 24 2019 1:04 AM UTC

}// 125/140

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#d3 #shading #lighting

u/pasacaglia

Cool
u/Qwitter

bone paper!

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tomxor

function u(t) {

eval(unescape(escape`瑼簨䄽䈽㠬愽戽〬潮步祵瀽攽㹡㴰Ɐ湫敹摯睮㵥㴾愽ㄹⵥ⹷桩捨⼲⤻景爨挮睩摴栽㘴ⱁⴽ愬䈭㵢Ⱪ㴳攳㭩ⴭ㭢㵚㰱㽢ⴴ攭㘺⸱⥸⹦楬汒散琨堽椦㘳ⱙ㵩㸾㘬娽ℨ䅞塼䉞天⴨吨⡙㵙⼳⭂⵴⨹⤫堯㍞堯㌭天㰵⤯㈬ㄩ`.replace(/u(..)/g,"$1%")))

Aug 23 2019 12:50 PM UTC

}// 140/140

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Don't Fall ! #game

u/tomxor

Use left + right... be fast
u/katkip

#genius ! Awesome! #compressed
u/aleamb

awesome! #interactive
u/sigveseb

woah, awesome idea!

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taupelink

remix of d/15493 by u/taupelink

function u(t) {

d=Math.PI/180;x.font='20pt serif';f=frame%360;x.fillStyle=`hsl(${f},99%,30%)`,x.fillText(f,960+1.8*(r=200+30*(f%10))*C(f*d),540-r*S(f*d))

Aug 25 2019 6:52 PM UTC

}// 137/140

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Hues 0-359, arranged so you can see the numbers

u/DataMeta

t*60 instead of frame nets a neat result and shows the precision of frame, or that it uses floor/ceil