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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rodrigo.siqueira

remix of d/16264 by u/rodrigo.siqueira

function u(t) {

v=(a,b,Φ,r)=>{for(i=0;i++<r;x.fillStyle=R(0,S(r)*200))x.fillRect(a-=S(Φ*i),b-=C(Φ*i),S(t),1)
r>9&&v(a,b,S(b)/2,r*=.9)}
v(960,800,t,99*t)

Feb 1 2020 5:25 PM UTC

}// 136/140

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Strange #plant #growth

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Xen

remix of d/17481 by u/alex_is_cool

function u(t) {

x.globalCompositeOperation='xor'
x.fillRect(900+S(t/3)*900,400+C(7*t/9)*400,99,99)

Feb 4 2020 5:01 PM UTC

}// 82/140

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quick test

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NickTaterz

function u(t) {

c.width|=0
x.font=`${-C(t*8)*2+9}em Arial`
x.fillText("E",960-S(t*8)*500-70,540-C(t*8)*100)

Feb 4 2020 2:31 PM UTC

}// 91/140

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katkip

remix of d/17432 by u/Cloud

function u(t) {

for(c.width|=i=5,x.lineWidth=9;i--;){x.lineTo(i*99+t*200,(S(-t*5-i*2)*30+500+C(-t)*100+i*S(t)*9));x.stroke()}

Feb 1 2020 10:37 AM UTC

}// 109/140

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Swimming organism

u/tomxor

Sea Snake !
u/Cloud

Wow. With me made remix (sorry, I bad write on English :) )
u/tomxor

Thats ok just write code :)

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tomxor

remix of d/17412 by u/KilledByAPixel

function u(t) {

with(x)for(c.width|=j=1e3,scale(9,3);j--;j%5?arc(109,52+j/5,j>900?99:36,a=t+j/.6366,a+.5):beginPath(stroke()))setLineDash([j%900>50?0:5])

Jan 30 2020 10:44 PM UTC

}// 137/140

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lionleaf

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<19;i++)
x.fillRect(200+i*S(t)*S(t)*49,400,50,200) // draw 50x200 rects

Feb 1 2020 12:08 AM UTC

}// 113/140

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New theme! #growth #default #loweffort

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KilledByAPixel

remix of d/17185 by u/KilledByAPixel

function u(t) {

with(x)for(c.width|=j=1e3,scale(9,3);j--;j%5?arc(109,52+j/5,j>900?99:25,a=t+j/.63662,a):beginPath(stroke()))setLineDash([j>930?2:j>99?0:6])

Jan 30 2020 5:15 PM UTC

}// 139/140

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Tiny Tower With Wall #castle

u/katkip

Awesome!
u/tomxor

wow

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KilledByAPixel

remix of d/17379 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑳🐨𦀬𦐬𬠬𪐽𜀩🐾𮰊𩡯𬠨𩡩𫁬𤱴𮑬𩐽𪰿𙰣𩡦𙰫𪰪𪰺𙰣𜀰𜀱𙰬𨡥𩱩𫡐𨑴𪀨𩡩𫁬𚁡𬡣𚁘𛁙𛁫🱲𞠲𩐳𛀰𛀷𚐩𚐻𪐼𞐻𪐫𚰩𭰽𪐪𬠪𞐬𘑫𯁲🠵𙠦𬰨𦀫𤰨𨐽𪐦𙠲𞐹𚡴𛱷𚱫𚐪𭰬𦐫𠰨𨐩𚡷𛰲𛁫𚰫🱲𚠨𛠶𛑃𚁫𚡫𚐯𝐩𞠹𚐊𯐊𬰨𞐶𜀬𝐴𜀬𪰽𜀩`.replace(/u../g,'')))

Feb 1 2020 4:23 AM UTC

}// 140/140

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Proto Solar System

u/Odog8

real gravity?
u/KilledByAPixel

no, it is faked!

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Odog8

function u(t) {

Math.sqrt(x)
x**.5

Math.sqrt(x*c)
(x*c)**.5

Feb 3 2020 4:41 PM UTC

}// 44/140

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golfing tricks improved ;)

u/Xen

first vanished? how magical, you forgot the cubed root part ;)
u/Odog8

eh, who uses cube root ;/
u/Odog8

credit to u/Xen btw
u/Xen

cheers,, may just be an edge case somewhere for x**(1/3), i kinda wanna make one now ;-)

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Cloud

function u(t) {

for(c.width|=i=10;i--;){a=T(t*2+i/10)
b=a*300
d=t*2+i
x.fillStyle=R(a*100)
x.arc(960-(S(d)*b),540-(C(d)*b),100,0,7)
x.fill()
x.beginPath()}

Feb 2 2020 9:25 AM UTC

}// 139/140

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u/Hepka

It's beautiful! You can put it on the site loading screen.