Random dweets | Dwitter

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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Jezza

remix of d/13473 by u/Jezza

function u(t) {

c.width|=X=Y=u=S(t)/9+.8
for(i=3e3;i--;x.fillRect(X*300+760,Y*300+600,2,2))T=.4-6/(1+X*X+Y*Y),Z=X,X=1+u*(Z*C(T)-Y*S(T)),Y=u*(Z*S(T)+Y*C(T))

Apr 26 2019 7:44 AM UTC

}// 140/140

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https://en.wikipedia.org/wiki/Ikeda_map u from .688 to .911

u/Xen

love it! i never got round to making one of these

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Qwitter

remix of d/5896 by u/Moosething

function u(t) {

x.globalCompositeOperation='xor';
x.fillRect(960,500,1,1)
x.drawImage(c,-1,-1)
x.drawImage(c,1,-1)
x.drawImage(c,-1,1)
x.drawImage(c,1,1)

Jan 12 2018 2:25 AM UTC

}// 138/140

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Thanks Moose!

u/joeytwiddle

Oooh clever. The code looks nothing like the image :)
u/donbright

holy ******** this goes down in history.
u/donbright

holy ******** this goes down in history.
u/sigveseb

so many nice xor/drawImage dweets going on now :))

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NabiKAZ

remix of d/16793 by u/lionleaf

function u(t) {

c.width|=i=0
x.font='21em vazir'
'سلام ایران'.split('').reverse().map(c=>x.fillText(c,9+(I=i%13)*165,420+S(I+t)*99+399*(i++/13|0)))

Mar 8 2025 4:05 AM UTC

}// 131/140

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Convert to Iranian version with Persian characters (:

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ciaccodavide

function u(t) {

r=n=>~~(Math.random()*n)
R=r(i=10)
x.font="3em'"
x.fillText(r+'',0,60)
while(i--)V.push(0),x.fillRect(0,i*99+99,V[i],90)
V[R]++}{V=[]

Nov 20 2020 10:43 AM UTC

}// 133/140

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Random Number Generator Function Tester

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iverjo

remix of d/159 by u/Froff

function u(t) {

!t&&x.translate(1359,462);x.rotate(0.9*S(5*t)+.009);x.translate(20,0);x.lineTo(0,0);x.stroke();

May 2 2016 4:16 PM UTC

}// 95/140

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patorick1

function u(t) {

c.width=1920
for(i=0;i<9;i++){
x.fillStyle=R(i*30, Math.random()*105,255-i*30,0.5)
x.fillRect(400+i*100+S(t)*300,400,50,200)
}

Jan 8 2023 7:08 PM UTC

}// 126/140

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second attempt, a remix of the sample

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george7ath

function u(t) {

w=192,h=108,b=10
for(i=0;i<w*h;i++){X=i%w*b,Y=i/w*b;r=(S(X+t)/S(Y+t)>0)?255:0;x.fillStyle=R(r,Y/5+S(t)%2,X/5+C(t)%2)
x.fillRect(X,Y,b,b)}

Feb 11 2025 1:39 PM UTC

}// 137/140

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Portal

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fujimotos

function u(t) {

c.width=1920
r=.92;s=.38;w=99;i=j=0
for(q=w;q--;i=q/6){j=S(i+t*3)
for(p=~~t%99;p--;[i,j]=[i*r-j*s,j*r+i*s])
x.fillRect(i*w+900,j*w+500,6,6)}

Mar 13 2018 3:45 PM UTC

}// 140/140

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Just adding plain sine curves...

u/magna

Lovely!
u/fujimotos

#wait_for_it

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zachygreen

remix of d/29065 by u/dtrip

function u(t) {

h=w=30
s=h+10
ny=1080/s|0
nx=1920/s|0
a=t*3333
i=a/s|0
Y=i/nx|0
X=i-Y*nx
x.fillStyle=R((X*23-Y*11)%256)
x.fillRect(X*s,Y*s,h,w)

Dec 5 2023 7:31 AM UTC

}// 127/140

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Saved 2 chars like a pro B)

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danny@hille.dk

remix of d/28166 by u/Xen

function u(t) {

for(X=c.width=99;X--;c.style.background='#f90')for(Y=64;Y--;)x.fillRect(X,Y,m=(X-49+S(t*2+Y/32+S(t*3+X/9))*16+Y-30)/16,m)

Jul 24 2023 5:51 PM UTC

}// 121/140

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quick play

u/Xen

nice!