Dweets awesomed by u/dull_pixel

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: #Opposites

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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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rodrigo.siqueira

remix of d/22565 by u/rodrigo.siqueira

function u(t) {

if(!t){for(a=-3;0>a;a++)for(b=-3;b<4;b++)for(C=-3;C<3;C++)for(X=680;X--;)Y=(C*99+S(X)*a*(X-340))/b,x.lineTo(X*3,548+9*Y/X-X/Y)
x.stroke()}

Apr 20 2021 4:49 PM UTC

}// 138/140

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Spectral Sound Waves

u/Xen

Destroys my laptop :-(

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BackendForth

function u(t) {

c.width=96
x.lineWidth=9
x.miterLimit=1
v=(a,b)=>x.lineTo(a+65,b+27)
v(0,0)
v(g=C(t)*20,h=S(t)*20)
v(g-(1999-h*h)**.5,0)
v(-99,0)
x.stroke()

Apr 20 2021 2:45 AM UTC

}// 140/140

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Cranking away . . .

u/erin

username fits

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taupelink

remix of d/22467 by u/taupelink

function u(t) {

for(i=h=k=210;i--;x.fillRect(k*X,k*Y,-i*p>>t,-i>>t))f=i*t,X=f*f%12,Y=X*f%6,h=i/3*S(Y*S(p=Y%t*Y*3)+X*S(Y*p)),x.fillStyle=R(i/2,h*4,h*p,9/p)

Apr 20 2021 2:09 AM UTC

}// 138/140

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d/22568

Show more comments…
u/magna

OH MY GOD
u/lars-erik

🤯👌
u/UEZ

Excellent! 1/Y/2 as alpha channel gives a softer water surface imho. :-)
u/UEZ

Even better: x.fillStyle=R(i/2,h*4,h*p,1/Y/6)
u/taupelink

thanks all--and yes, I like that variant!
u/magna

u/taupelink how much of your work is intention versus happy accidents? It would be lovely to see a blog post from you explaining your process...
u/taupelink

far, far closer to happy accidents. lots and lots of trial and error to see what works. with that said, it's not just throwing darts blindly. maybe like panning for gold?
u/taupelink

in any case, i will think about writing up some kind of essay on it!
u/DaSpider

Reminds #monet #impressionism
u/tomxor

#waitforit

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magna

function u(t) {

c.width=1920
x.globalCompositeOperation='xor'
for(i=18;i--;)x.fillRect(400+i*50+S(t)*300,400+i*S(t/9)**9*200,2e3,200)

Apr 19 2021 12:25 AM UTC

}// 117/140

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#default xor #glitch

u/magna

#waitforit
u/DataMeta

whoa! nice one

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aemkei

function u(t) {

c.width=550;for(X=99;X--;)for(Y=60;Y--;r>Y||60-Y<r||x.fillRect(5*X,5*Y,r<7?1:6,r<7?6:1))r=X**Y%9

Apr 18 2021 9:08 PM UTC

}// 96/140

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A homage to Frieder Nake's LABYRINTH in 96 bytes of JavaScript.

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u/aemkei

https://twitter.com/aemkei/status/1383890209…
u/erin

wow omg
u/Xen

love it!
u/donbright

thhe way it dissipates at edges is cool
u/rep_movsd

#underrated
u/Joachim

#maze

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KilledByAPixel

remix of d/22480 by u/KilledByAPixel

function u(t) {

with(x)for(i=h=c.height|=0;i--;fill(arc(X=i*(i+t)%3e3-600,C(i)*h,i?h/i:1e4,0,7)))beginPath(globalCompositeOperation='xor')

Apr 14 2021 11:59 PM UTC

}// 122/140

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Backspace 🌒

u/sigveseb

noice!

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contone

function u(t) {

x.setLineDash([9,50]);
x.clearRect(0,0,2e3,2e3)
x.lineDashOffset=f=frame
t<11?x.ellipse(960+S(t)*100,1e3-f,f,f/2,0,0,8):0
x.stroke()

Apr 14 2021 2:56 PM UTC

}// 132/140

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u/deltuhvee

Tornado
u/magna

Nicely done!

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KilledByAPixel

function u(t) {

with(x)fill(arc(X=2e3*Math.random(beginPath(globalCompositeOperation='xor')),X*X%1e3,t?9/t:2e4,0,7))

Apr 14 2021 3:41 AM UTC

}// 100/140

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Negative Space

u/mrfoogles

xor is cool.
u/KilledByAPixel

xor is the bestor! :)

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veubeke

function u(t) {

for(X=151;X--;)for(i=2;i--;x.fillRect(60+(X/9|0)*120-W,60+X%9*120-W,W*=2,W))W=X%2?t%1+i:1-t%1+i,W=W<1?W*60:60,x.fillStyle=t+i&1?'#fff':'tan'

Apr 13 2021 10:13 AM UTC

}// 140/140

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u/Xen

nice!
u/erin

so cool!!
u/danny@hille.dk

#perfectloop
u/magna

Whoa!
u/andrea270872

for some reason it makes me want to play chess! very nice

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