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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aaaaaz

function u(t) {

w=960,h=540
x.translate(w,h)
x.drawImage(c,1,1,w,h)
x.fillRect(0,0,9,w);x.rotate(3.13);x.translate(-w,-h)
x.shadowBlur=9;x.shadowColor="red"

May 19 2019 12:46 AM UTC

}// 140/140

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rodrigo.siqueira

function u(t) {

Y2=X2=X=0
Y=S(t)
for(i=3e3;i--;){
N=(P=X*X+Y*Y)*S(3/(P)**0.5)
X2+=-Y+X*N+S(i)
Y2+=X+Y*N
X=X2/4
Y=Y2/8
x.fillRect(960+X*1e3,540+Y*1e3,1,.3)
}

Jun 10 2019 8:09 PM UTC

}// 140/140

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I was trying to create this: https://imgur.com/gallery/jpAn7tX but something very wrong happened. The equations in the page seem simple, if anyone wants to try...

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danny@hille.dk

function u(t) {

for(i=w=c.width=960;i--;x.lineTo(w/2+w*C(i)/3,300-(C(i)*S(i)*3)/e*w))e=C(T(i)*3-S(t*6-C(t+i*9)-t)-t)-8
x.stroke()

Feb 28 2021 3:33 PM UTC

}// 113/140

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What superhero?

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BirdsTweetCodersDweet

remix of d/7410 by u/fujimotos

function u(t) {

for(c.width=i=120;i--;)
z=Math.max(Math.min(-t+i/4,0),-1),
x.setTransform(a=C(z),b=-S(z),-b,a,80+8*i+-30*t,i/10),
x.fillRect(15,4,-5,-10)

Mar 25 2018 5:11 PM UTC

}// 137/140

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Anti-gravity dominoes :D

u/BirdsTweetCodersDweet

Had to shrink it to golf... Full dweet: for(c.width=i=600;i--;) z=Math.max(Math.min(-t+i/4,0),-1), x.setTransform(a=C(z),b=-S(z),-b,a,400+40*i+-150*t,i/2), x.fillRect(54,100,-25,-80)

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f8f82804

remix of d/12142 by u/f8f82804

function u(t) {

with(x)t||fillRect(t,t,a=5e3,a),setTransform(9,0,0,9,960,540),rotate(w=t&&w<a?w+2.4:1),fillStyle=`hsl(${t}rad 95% 50%`,fillRect(w**.5,0,2,2)

Feb 4 2019 7:57 PM UTC

}// 140/140

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#rainbow #phyllotaxis with #squares -- thanks to u/pavel

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magna

function u(t) {

c.width|=0
x.filter=`blur(${C(t*9)*49}px`
x.fillRect(400+S(t)*300,400,850,200)
for(i=8;i--;)x.clearRect(450+i*100+S(t)*300,0,50,2e3)

Oct 11 2018 3:24 AM UTC

}// 132/140

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#default

u/magna

You should see an eye doctor.
u/donbright

wow

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ibebrett

function u(t) {

c.width=1920
x.translate(1920/2, 1080/2);
for (n=0;n<10;++n){
x.fillRect(S(t+n*t/20)*500 , C(t+n*t/20)*500, 200*C(t+t*n),200*C(t+t*n));
}

Dec 27 2017 1:44 AM UTC

}// 137/140

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u/sigveseb

Nice one!

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KilledByAPixel

remix of d/31956 by u/KilledByAPixel

function u(t) {

for(i=2e3;i--;x.fillRect(i,t*120,((i+h)/99^t-(h|0)/400)%.9,2))h=(2e5-(i-960)**2-(t*120-540)**2)**.5

Jun 5 2024 7:09 PM UTC

}// 99/140

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Small Sphere 🎱

u/joeytwiddle

Beautiful! #sphere

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tomxor

remix of d/21783 by u/tomxor

function u(t) {

A=t?A.map(a=>(s=u[a>>4]^=1,x[s?'fillRect':'clearRect'](a>>6,a&1008,16,16),a=a+2*s+1&~4,a+=a&1?a%4-2<<10:a%4-1<<4)):[54675,69010,69233,54896]

Mar 2 2021 11:27 PM UTC

}// 140/140

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Multi #langton's #ant

u/tomxor

Squashed each ant into a 16bit bit field, [X,Y,D] = 0b 111111 111111 0111. These ants were generated with: X=7,Y=7,D=0,[[-X,-Y,3+D],[+Y,-X,2+D],[+X,+Y,1+D],[-Y,+X,0+D]].map(([X,Y,D])=>X+60<<10|Y+32<<4|D%4<<0)
u/mark1626

This is incredible. Just one question, how does s = u[a >> 4] ^= 1 work?
u/tomxor

Thanks :) a>>4 is the cell index of a 64x64 grid. the lower 4 bits are for the ant's direction so shifting them off to the right leaves only the 12 X and Y bits (see above). u is just an object, so all of these indicies will be undefined initially, but undefined is falsey and bitwise operators coerce falsey into 0, i.e undefined ^ 1 == 0 ^ 1 == 1, in otherwords XOR just treats all of the initial cell values as 0. Using the assignment version ^= means we toggle each cell between 0 and 1 each time an ant passes through it (which is part of the langton ant rules).

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andres

function u(t) {

c.width=1920; 
for(i=0;i<200;i++)
x.fillRect((i*100+S(t)*500)-500, 500, 80*S(t)%100, (c.height/100)+(i*20)+S(t*2)*500)

Feb 25 2017 7:18 PM UTC

}// 118/140

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