Dweets awesomed by u/mark1626

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: #Food

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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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rodrigo.siqueira

remix of d/21765 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,2e3,2e3),i=w=400;i>-400;i--,x.clearRect(960+i+S(i/40+t/3)*w,540+200*S(i/40)*C(t/3+S(i/9+t))*S(i*i),2,6))x.globalAlpha=.1

Feb 26 2021 11:36 PM UTC

}// 139/140

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boids flow

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Pascal

remix of d/21403 by u/danny@hille.dk

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=(i-X)/w,0<T(T(S(X/7+5*C(t))+S(Y/7-5*t))),1)

Jan 24 2021 2:39 PM UTC

}// 91/140

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noisy donuts

u/danny@hille.dk

Mmmmm donuts
u/Xen

nicely done

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tomxor

remix of d/21114 by u/magna

function u(t) {

for(c.width&=i=8320;i--;)
x.fillRect(X=i&127,Y=i>>7,1,Y/4-8>T(T(S(X/4)*S(Y/4+t*4))))

Jan 3 2021 11:45 AM UTC

}// 84/140

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Smolr

u/DataMeta

bravo
u/magna

83, if you roll the second line up

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taupelink

remix of d/20654 by u/taupelink

function u(t) {

r=Math.random;for(i=k=214;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*5)*9,h=k*S(Y%S(m=X/6%S(p=C(q=Y*S(X/3))*2)*2)),x.fillStyle=R(h*p,h*m,h*q)

Dec 2 2020 4:43 AM UTC

}// 140/140

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d/20902

u/pavel

You can save 7 chars by doing f=i*t,X=f*f%9,Y=X*f%5 in these instead of Math.random. It seems random enough.
u/taupelink

Oh cool, thank you!! I like the way it changes the animation at the beginning too.

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rodrigo.siqueira

remix of d/18458 by u/rodrigo.siqueira

function u(t) {

for(X=f=c=>S(S(9*c/d)*t),Y=t/8-1.1,i=2e3;i--;x.fillRect(i,t*60,(1+f(X=i/480-2)*f(Y))*(d/2+Y),3))x.fillStyle=R(C(r=X*X+Y*Y)*125),d=r>1||T(r)

Apr 23 2020 5:58 PM UTC

}// 139/140

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Red Sphere Reflection #raytracing (high resoluton)

Show more comments…
u/Xen

Tf Dude! top dweet right here 😍
u/lionleaf

That's amazing!
u/lionleaf

#glass #sphere
u/stiaje

#witchcraft
u/Ath0r

Impressive, great job!
u/katkip

genius script
u/PoweredByWill

wow. dwitter povray.
u/mole

I am shooketh. This is absolutely incredible.
u/katkip

#slowrender
u/cli

This is great.
u/Nascretis

Actually insane. #witchcraft
u/ximavus

So realistic

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firegodjr

remix of d/8369 by u/BirdsTweetCodersDweet

function u(t) {

for(c.width|=i=1e3;i--;x.beginPath())x.globalAlpha=.1,x.arc(S(t*2+i/50)*i+960,C(t*3+i/50)*i+540,i/9+2,0,7),x.fill()

Jun 4 2018 4:52 PM UTC

}// 115/140

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u/joeytwiddle

I like the shading effect. It makes the tube appear rounded.

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Xen

remix of d/3713 by u/bobdunn

function u(t) {

for(c.width|=Y=i=300;i--;x.fillStyle=R(Z=C(i+t*4)*Y,Z*S(t),5-Z,.6))x.fillRect(i*9,Y+C(3*t+(i*2))*99,39,Y)

Dec 27 2017 6:40 PM UTC

}// 105/140

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had to have a play, quick test... shoutz to bobdunn

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u/karan

Hot damn! that looks fancy! and i thought i was doing something great by just adding random colour :D
u/Xen

always save your code to one side before posting, play with it to see if you can squeeze something extra out.
u/karan

Helpful tips! Is there an IRC or some messaging service to hang out with fellow dwitters?
u/Xen

https://discord.gg/emHe6cP
u/bobdunn

I was thinking about adding color. I like what you did here!
u/Xen

thanks :-)

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