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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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anotherkitten

function u(t) {

for(d=19;d--;x.beginPath(x.fill())){p=d+t%1;x.fillStyle=`hsl(${140+t*2} 66%${80-S(p/4)*40}%`;x.arc(960,540,p*60,o=p/2+t/2,++o)}

Oct 21 2018 3:06 AM UTC

}// 127/140

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cute spiral

u/Agnes

Consider using properly formatted HSL if you have the characters to spare - these all show up as 100% black on iOS Safari!
u/anotherkitten

true, should have done, just habit to use the broken one

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ersagun

function u(t) {

if(!t)s=k=0,i=j=b=500
s+=(k+=Math.random()-.5)/20
k=Math.min(Math.max(k,-5),5)
i+=C(s)/50
j+=S(s)/50
x.fillRect(S(j)*b+b+b,S(i)*b+b,5,5)

Oct 21 2018 1:55 AM UTC

}// 136/140

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ersagun

remix of d/10573 by u/logistikalism@gmail.com

function u(t) {

for(i=9;--i;)for(j=9;--j;)x.fillRect(120*i+C(t*i)*50,120*j+C(t*j)*50,1,1)
x.fillRect(C(t)*300+1480,C(t*(1+Math.sqrt(2))/2)*300+540,1,1)

Oct 21 2018 1:10 AM UTC

}// 135/140

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Plaid pillow #goldenratio #phi

u/katkip

nice

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ersagun

function u(t) {

for(i=j=0,f=24;f--;i+=d("◴∈⌹⌙⍈⌮⌠⌇⌢⌑⌆⌤⌾⍃⌣⌘⌯⌧〈⌳〉⌤⌬⌯"),j+=d(
"○⍈⌾⋻⌤⋧⌥⌬⌰⍕⍓⌗⌥⋼⌘⌭⋧〉⌔⌗⍃⌫⌛〈"))d=a=>C(t*f)*(a.charCodeAt(f)-9e3)
x.fillRect(i,j,9,9)

Oct 21 2018 12:11 AM UTC

}// 140/140

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#yeah

Show more comments…
u/ersagun

This uses a modified version of DCT. All data is in 2 magic strings. To create your own: https://pastebin.com/zEH5aH1R copy this to a dweet draft, draw, get your own magic strings.
u/katkip

wait wot that s actually toi impresive to think how its made
u/iverjo

Clever!
u/Banjuan

Wow dude!
u/Banjuan

Wow dude!
u/magna

yup.
u/aleamb

yeah!!!
u/f8f82804

Awesome! I don't think I've seen a technique like this before! #compressed #math
u/cantelope

crazy cool

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bbyalcinkaya

remix of d/10576 by u/bbyalcinkaya

function u(t) {

c.width=1920
for(i=0;i<360;i++){
k=(360-i)*t/60
x.fillRect(960+i*C(k*S(t/20)),540+i*S(k),20,20)
}

Oct 20 2018 11:08 PM UTC

}// 99/140

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bbyalcinkaya

function u(t) {

c.width=1920
d=60// change this
for(i=0;i<360;i++){
k=(360-i)*t/60
x.fillRect(960+i*C(k),540+i*S(k*t/d),20,20)
}

Oct 20 2018 9:45 PM UTC

}// 114/140

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eine kleine nachtdweet

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pavel

remix of d/10485 by u/joeytwiddle

function u(t) {

for(z=42;j=z-->>1;x.fillRect(960+S(k)*15-w/2,540+C(k)*15+w/2-r,w,2*r-w))k=7*t-j/2,x.fillStyle=`hsl(${15*k},33%,${7*j}%)`,r=50*j,w=r*(.5+z%2)

Oct 20 2018 8:43 PM UTC

}// 140/140

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Fixed the plus shape in the back and added color cycling

u/pavel

Check it out in fullscreen

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rbong

remix of d/697 by u/p01

function u(t) {

for(n=210;n-=1/64;x.fillStyle=`hsl(${k*22},99%,50%)`,x.fillRect(n%3*666,n*5,16,16))for(r=C(t),i=S(t),k=28;--k/r;i=j)j=r*i-n/99,r=r*r-i*i-n%3

Oct 20 2018 5:53 PM UTC

}// 140/140

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Rainbow Fractal Slice

u/rbong

#fractal #rainbow
u/prplz

#heavy
u/rbong

Looks a bit heavier than the original because I had to slow it down, but it's the same intensity. I would like to make a faster Mandelbrot/Julia set. This is closer to the original effect:
u/rbong

c.width|=0;for(n=200;n-=1/64;x.fillStyle=hsl(${k*22},99%,50%),x.fillRect(n%3*666,n*5,16,16))for(r=C(t*3),i=S(t*4),k=28;--k/r;i=j)j=2*r*i+1-n/99,r=r*r-i*i+1-n%3
u/rbong

Insert backticks where the style changes in that comment, I can't edit it

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logistikalism@gmail.com

function u(t) {

for(i=1;i<13;i++){for(j=1;j<7;j++){x.fillRect(150*i+S(t*(i))*55,150*j+C(t*j)*55,10,10)}}

Oct 20 2018 3:14 PM UTC

}// 88/140

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tomxor

remix of d/10534 by u/tomxor

function u(t) {

k=160,i=1e3,w=.04
for(t+=32;p=i&1,m=k/C(t/i)+p*(k/2+i%k),i--;)x.fillRect(
960+m*S(n=t/16+i*i)*C(!p*i/t),
540+m*C(n+p*2),s=w-C(n)*w,s)

Oct 20 2018 1:58 PM UTC

}// 133/140

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#space #saturn #drawing

u/katkip

oh wow
u/joeytwiddle

Very nice. Set w=.2 if you don't want to #waitforit
u/tomxor

Oops, this doesn't seem to work at all in some browsers... showing up the aignificant subpixel interpolation differences between canvas implementations. Works in chrome - soz