Top dweets by u/BackendForth

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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BackendForth

remix of d/23330 by u/BackendForth

function u(t) {

for(i=6999;i--;){v=Math.random
a=v()*1920
b=v()*1080
x.fillStyle=R(0,n=255*.99995**((T(t)*99+960-a)**2+(540-b)**2),n)
x.fillRect(a,b,9,9)}

Jul 15 2021 12:39 AM UTC

}// 138/140

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u/magna

Loving this technique!
u/donbright

me too

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BackendForth

function u(t) {

c.width|=0
for(i=99;i--;)x.arc(i*(70+t*5),540,(t-i<0?0:t-i)*99,0,7)
x.stroke()

May 6 2021 12:55 PM UTC

}// 78/140

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breaking the sound barrier

u/Xen

nice concept!

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BackendForth

function u(t) {

c.width|=0
for(i=2;i--;)
for(j=0;j<6.28;j+=6.28/9)
{w=99/(S(t+j)+2)
x.fillRect(i*960+400+C(t+j)*400+w*i,540-w/2-S(t*9+j)*99,w,w)
}

Apr 5 2021 6:22 PM UTC

}// 130/140

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#stereograph Cross your eyes until the images are on top of each other for a 3d effect!

u/taupelink

whoa
u/magna

Nice! I relax my eyes (i.e. as if looking at a distance) instead of crossing. Then the smallar squares appear closer, not farther away. But amazing regardless! More of this technique please!

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BackendForth

function u(t) {

c.width|=0
for(i=540;i-=9;)x.arc(960+99*S(i/199-t),i+540,200+i/8,0,7)
x.fill()
for(j=2;j--;)x.clearRect(910+j*99+99*S(-t),540,11,11)

Oct 11 2021 5:51 PM UTC

}// 132/140

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#ScaryMovies

u/BackendForth

hmm, maybe this is more cute than scary
u/FireFly

definitely cute :p but no less awesome for that

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BackendForth

function u(t) {

x.fillRect(0,0,1920,1080)
for(i=p=999;i>-p;i--)for(k=j=(p-i*i)**.5;j>-k;j--)if(i*C(t)+(k*k-j*j)**.5*S(t)>-3)x.clearRect(960+i*9,540+j*9,9,8)

Mar 23 2021 1:33 AM UTC

}// 140/140

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u/Qwitter

I cant believe I stared at this for four months
u/Qwitter

(nice!)

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BackendForth

function u(t) {

c.width=960
r=260
for(i=-1;i<1;i+=.05)for(j=-1;j<1;j+=.05)d=11*(i*C(t)+j*S(t)+(1-i*i-j*j)**.5),d>0?x.fillRect(r+r*i,r+r*j,d,d):0

Jan 5 2018 5:01 PM UTC

}// 128/140

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u/M1T0

It looks like an eye or something
u/Lazy1337

#eye
u/Lazy1337

#metaball
u/Lazy1337

#metaballs
u/joeytwiddle

#meteyeball

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BackendForth

remix of d/22819 by u/BackendForth

function u(t) {

v=Math.random
i=v()*2e3,j=v()*999,x.fillStyle=R(0,0,a=v()*256)
for(k=999;k--;)x.fillRect(i,j,3,3),a=i-960,b=j-540,i+=S(b/a),j+=S(a/b)

May 19 2021 1:47 AM UTC

}// 133/140

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Underground tunnel? Cracked windshield? Going to warp?

u/lars-erik

#fracture

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BackendForth

function u(t) {

x.globalCompositeOperation="xor"
if(!t)a=b=9,d=0
x.fillRect(a-d/2,b-d/2,d,d)
d+=t
if(d>t*9)d=0,a=Math.random()*1920,b=Math.random()*1080

Apr 21 2021 12:31 PM UTC

}// 136/140

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What my phone sees when I try to scan a QR code

u/lars-erik

Nice. Could you the other "don't xor", I wonder. Could make for a less chaotic effect when it grows.
u/DataMeta

#waitforit #keepsongiving

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BackendForth

function u(t) {

for(i=99,c.width|=0,q=1-2**t,a=999;i--;)x.fillRect((i*99+t*a/q)%1920,i**i%a,9,9)
x.translate(a,k=540)
x.rotate(2-t/q)
x.fillRect(-k,0,a,150)

Mar 26 2021 2:28 PM UTC

}// 140/140

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Getting in on the Suez memes

u/magna

LOL
u/magna

#savage
u/magna

#suez #meme #evergiven
u/timothytomato

it took me a bit to get this

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BackendForth

remix of d/21786 by u/BackendForth

function u(t) {

x.fillStyle=R(0,25*t%256,0)
for(i=1920;i--;)x.fillRect(i,540+398*S(t+i)+68*S(t+i*i)*C(t*t/99+i),1,1)
x.drawImage(c,0,-1,1920.1+t/9,1082)

Feb 28 2021 7:05 PM UTC

}// 136/140

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