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.

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Current theme challenge: #Food

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katkip

remix of d/11885 by u/katkip

function u(t) {

seed=4
c.width*=1;for(i=43;i--;)for(j=71;j--;)
x.fillRect(j*30+S(i/seed+t)*100-100,i*30+C(j/seed+t)*100-100,30,30)

Jan 19 2019 6:50 PM UTC

}// 114/140

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It is going up. To go down, change seed=0.02

Show more comments…
u/katkip

Haha, this got 20 likes
u/Xen

seed=5+C(t)*2
u/katkip

The perfect straight one is seed=.0123
u/katkip

44 likes om!
u/vain

Very cool and smooth looking fx
u/ximavus

I put seed=t its like zooming in

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metamero

function u(t) {

for(j=frame;j--;pauseDemo=parent.postMessage({type:'error',error:'metâmero',location:location.origin+'/id/'+d},'*'))d=t?j%2?d+j:d-j:11934

Jan 24 2019 7:06 PM UTC

}// 137/140

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all mine

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f8f82804

remix of d/7744 by u/rjro

function u(t) {

c.width=32;d=new Date>>>8;for(i=6;i--;)for(j=20;j--;)"縿Ϡ庽纵粇皷皿簡线粧碾⪿䘮㨿嚿ᒿ".charCodeAt((d>>i*4)&15)&1<<j%20&&x.fillRect(27-5*i+j/5|0,j%5+7,1,1)

Jan 26 2019 5:13 AM UTC

}// 139/140

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#hex #clock

u/f8f82804

the font is from d/11960
u/f8f82804

Each tick takes 256/1000 sec, so each pair of digits gives a value 0-255 in units of 4.66 hours, 1.092 minutes, and 0.256 seconds, respectively.
u/f8f82804

The whole clock only rolls over once every 49.71 days.

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davidsharp

remix of d/11923 by u/davidsharp

function u(t) {

c.width|=0;k=100;x.font=k+'px a';T='hello•world•'
for(i=0;++i<k;)for(j=0;++j<11;)x.fillText(T[i%12],-2e3+(k*i)+(t*k)*(j%2||-1)%(k*12),k*j)

Jan 23 2019 1:11 PM UTC

}// 138/140

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pavel

remix of d/11836 by u/cantelope

function u(t) {

with(x)for(c.width|=j=50;--j;stroke())for(Z=.2+j-3*t%1,lineWidth=1+50/Z/Z,beginPath(i=7);i--;)arc(960,540,1e3/Z,a=(2.513*i+Z/7+t/2)%6.283,a)

Jan 23 2019 2:40 AM UTC

}// 140/140

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Uncompressed

u/cantelope

amazing remix, as always :D
u/cantelope

was wondering where you've been.. i shudder to think what you can make within 1kb. feel free to remix my work on codegolf.tk if you like.
u/pavel

Thanks man! I was on vacation in New Zealand for a month with just my phone. I'll check out codegolf.tk, I do like optimizing down to 140.
u/pavel

#uncompressed

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katkip

remix of d/11926 by u/katkip

function u(t) {

c.width*=1;x.shadowBlur=20;f=s=>{if(s>10)x.shadowColor=R(s*s),x.fillRect(960+C(s*C(s-t)/99)*s,540+S(s*S(s+t)/99)*s,10,10),f(--s)}
f(30+t*30)

Jan 23 2019 4:45 PM UTC

}// 140/140

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FrenchToast

function u(t) {

for(j=10;j--;){for(i=300;i--;){x.fillRect(i^2 + 1920*S(t/2),j*200 + 200*S(t*1),1,4)};};

Jan 25 2019 11:48 PM UTC

}// 87/140

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WasifBoomz

remix of d/11950 by u/WasifBoomz

function u(t) {

for(i=0;i<500;i++)
x.strokeRect(0,0,i/t,i+t)
x.fillRect(0,0,i/t,i/t)
x.fillStyle=R(Math.random()*255,Math.random()*255,Math.random()*255)

Jan 25 2019 4:46 PM UTC

}// 138/140

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WasifBoomz

remix of d/11949 by u/WasifBoomz

function u(t) {

for(i=0;i<500;i++)
x.strokeRect(0,0,i/t,i+t)
x.fillRect(0,0,i*t,i/t)
x.fillStyle="blue"

Jan 25 2019 4:45 PM UTC

}// 88/140

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WasifBoomz

remix of d/11948 by u/WasifBoomz

function u(t) {

for(i=0;i<500;i++)
x.strokeRect(0,0,i*t,i/t)
x.fillRect(0,0,i/t,i/t)
x.fillStyle="blue"

Jan 25 2019 4:41 PM UTC

}// 88/140

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