Top dweets of all time

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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rodrigo.siqueira

remix of d/23669 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(`
A=a=b=.8/t;s=400
for(i=1e4;--i;b=A,A=a)x.fillRect(900+a*s,480+b*s,1,t<5),a=.4-b+Math.abs(a/2+1/b/2e3)*(A/3-.5)

Aug 29 2021 12:23 AM UTC

}// 134/140

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Axon formation around a multinucleate alien cell

u/sigveseb

Nice!
u/Toby

Fab! Do you have a source reference for the kind of iterated formula you're using?
u/rodrigo.siqueira

You can see the original equation by changing the to "s=70" and the end to: a=1-b+Math.abs(a)
u/rodrigo.siqueira

It's based on the "Gingerbreadman Map" #gingerbreadman https://www.dwitter.net/d/14641 I don't understand the details but I know that "Even the simplest mathematical expressions, when interpreted as dynamical systems, yield fractals."
u/Toby

Ahhhh yes of course! I remember Gingerbreadman now! Thank you Rodrigo!

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Joachim

function u(t) {

eval(unescape(escape`󘝴󟽰󟝛󧜺󬌮󭝮󬽨󪝦󭌨󮽸󞬹󝬰󚽓󚍴󚜪󞜹󛍹󞬵󝌰󚽃󚍴󚜪󝜰󛍳󞬱󛍣󞭒󚍓󚍴󚬹󚜪󜜵󜌬󥌨󭌪󞜩󚬸󜌬󜌩󯜩󒭦󫽲󚍩󘍯󩬠󬌩󮽩󛭳󟬱󞜹󞜿󬌮󬍯󬌨󚜺󮌮󫍩󫭥󥽩󩍴󪌽󪜮󬼯󞜊󮌮󬽴󬭯󪽥󤽴󮝬󩜽󪜮󨼊󮌮󬽴󬭯󪽥󤭥󨽴󚍩󛭸󛝩󛭳󛼲󛍩󛭹󛝩󛭳󛼲󛍩󛭳󚬽󜜮󜌳󛍩󛭳󚝽`.replace(/u../g,'')))

Aug 24 2021 1:37 PM UTC

}// 140/140

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#Tunnel Of Power

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danny@hille.dk

remix of d/23577 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`󢜽󫭥󭼠󢝭󨝧󩝄󨝴󨜨󨼮󭽩󩍴󪌽󭼽󜼰󜌬󭼩󞽦󫽲󚍩󟝷󚬱󞜰󞽩󛜭󞼩󦜽󪜯󭼯󞜭󞜬󬬽󚌨󦌽󚍩󙝷󚜯󞜭󜜷󚜪󦍼󦜪󦜩󛽷󛍉󛭤󨝴󨜮󬽥󭌨󦽋󟝔󚍙󛽲󛝴󚬲󝝞󦌯󬬩󚭙󚼱󝬪󚌲󚽓󚍴󚬳󚜩󛽲󛍋󛼳󛍋󛽲󛼶󝌬󭽝󛍩󚬴󚜻󮌮󬍵󭍉󫝡󩽥󡍡󭍡󚍉󛌰󛌰󚜻`.replace(/u../g,'')))

Aug 18 2021 9:52 PM UTC

}// 131/140

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unholy light remix

u/neimad

show off
u/Xen

Nicely done!
u/magna

AWESOME!
u/tomxor

Really cool effect, looks like some kind of rotating light and shadow or a hologram
u/danny@hille.dk

Thanks for the nice comments guys!

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tomxor

remix of d/23544 by u/pavel

function u(t) {

for(a=Math.abs,c.width&=i=4352;X=1-(T+i/32)%2,Y=--i/2e3;x.fillRect(X*r+64*T,Y*r+96-64*a(S(t)),T=a(2-t%4)+1,(i^i/64)/8&1))r=64/(--Y*Y+X*X+1)

Aug 13 2021 12:57 AM UTC

}// 139/140

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Smoother #Amiga #Ball

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u/tomxor

..But less authentic. Remaps the pixel positions rather than texture, which gives "free" antialiasing, with spare space to correct the spin.
u/pavel

Oh yeah, nice. This is definitely a better way of doing it. The other mapping has an incorrect center that I have to waste characters to correct.
u/pavel

-2 char using S(t%3.14) to bounce and inlining the single Math.abs call
u/danny@hille.dk

What a clever trick, using modulus pi of t, to only get the positive part of the sinus curve
u/danny@hille.dk

3.2 works fine, while 3 and 3.1 looks wrong
u/danny@hille.dk

test code: c.width|=0,x.fillRect(o=860,o-S(t*4%3.2)*o,200,200)

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KilledByAPixel

remix of d/23497 by u/danny@hille.dk

function u(t) {

for(c.width=w=255,i=4e4;i--;)x.fillRect(a=i%w,b=i/w,((o=(3-(4-5*(e=((X=2*b-w)*X+(Y=2*a-w)*Y)/w/w)+S(t))**.5)/++e)*Y-w*S(t)&w^X*o+t*w&w)/w,1)

Aug 8 2021 1:41 PM UTC

}// 140/140

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Xor Sphere #uncompressed

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u/danny@hille.dk

Nice work!, I actually did try a solution with fillRect - but it totally kills my laptop, runs kinda ok on my phone though (I get around 11fps with this dweet on my laptop, 28 on my phone)
u/danny@hille.dk

btw nice trick with ++e, i haven't seen that before, I'll put it on my toolbelt right away :-)
u/KilledByAPixel

Yep, had to make some sacrifices for speed. You can do w=127 and get a pretty good fps!
u/danny@hille.dk

this is my aptempt: reduced the resolution to get at bit more performance: c.width=w=127;for(m=w*w;m--;x.fillRect(m%w,m/w,1,(Y*(o=(3-(4-5*e+S(t))**.5)/(e+1))*w+t*w&w^X*o*w&w)/w))e=(X=1-4*m/w/w)*X+(Y=-2+4*(m%w)/w)*Y
u/danny@hille.dk

with the ++e trick its only 137 bytes :-)
u/danny@hille.dk

Sorry i hadnt seen you wrote back, yep i did 127, (any pow(2)-1 will work for the xor pattern)
u/aleamb

#sphere
u/donbright

dude

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rodrigo.siqueira

remix of d/23456 by u/rodrigo.siqueira

function u(t) {

for(c.width=w=512,d=new ImageData(w,w),m=w*w,i=-1;m--;d.data[i+=4]=T(Y/r-t*9|X/r)*w)r=((X=m%w-128)*X+(Y=m/w)*Y+i)/5e4
x.putImageData(d,0,0)

Aug 2 2021 9:37 PM UTC

}// 139/140

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Fly over a pixel surface

u/tomxor

oooh

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New_Core

function u(t) {

for(c.width|=i=5,x.translate(900,800);i--;)x.font=6-i+"cm A",x.rotate(C(t-3**S(a=t-i-1))/9),x.fillText(i<1?"🚍":"🚔",199*C(a*1.3)-99,-i*50)

Aug 1 2021 1:55 PM UTC

}// 137/140

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Movie: Speed

u/KilledByAPixel

Nice! #speed

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KilledByAPixel

remix of d/19786 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󭌿󭌪󟜶󜌺󬜽󨼮󭽩󩍴󪌯󟜸󒭦󟝦󟜾󮌮󩭩󫍬󤭥󨽴󚌷󚽴󙜱󝬪󜜵󛝦󛝪󛌨󭌾󟬴󚜪󜜷󚽢󛝪󛍺󟝪󟼳󞬱󛍺󚜊󩭯󬬨󪼽󬜻󛜭󪼻󥌨󬼽󬜫󪼥󜜲󞌪󚍴󚼱󚜩󟌲󟽳󚭳󙜶󟭍󨝴󪌮󪍹󬍯󭌨󨜽󪼥󞌬󚍢󟝫󙜱󜬸󟬾󜼩󛜸󚜦󙭦󚍡󚜦󩬨󛝡󚜺󮌮󩭩󫍬󤽴󮝬󩜽󤬨󭬽󪭼󯍳󙝱󛍶󛍶󚜩󪬽󪼾󟬷`.replace(/u../g,'')))

Jul 13 2021 4:49 PM UTC

}// 140/140

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Gameboy Sprite Generator

u/rep_movsd

0,2 looks like an elephant
u/tomxor

These are awesome, a lot of marioesque character sprites in here.
u/tonetheman

this is magic
u/andrea270872

very cool

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rodrigo.siqueira

remix of d/23284 by u/erin

function u(t) {

c.style.filter=`blur(2px)contrast(3)invert(`
for(i=c.width|=f=g=>i*g(i/5+t)/5+440*C(i)*g(i/5-t);i--;)x.lineTo(960+f(C),540+f(S))
x.stroke()

Jul 5 2021 2:32 AM UTC

}// 139/140

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Pulsating star and pentagon

u/jelmo

I like this

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KilledByAPixel

function u(t) {

eval(unescape(escape`󭽩󭍨󚍸󚝦󫽲󚍤󬭡󭽉󫝡󩽥󚍣󛌭󞌬󜌩󛍳󨝶󩜨󬭥󬽴󫽲󩜨󚜩󛍤󬭡󭽉󫝡󩽥󚍣󛌲󝜶󛌰󚜬󪜽󭌿󝜺󝝥󜼻󪜭󛜻󭌿󨝲󨼨󞌶󜌬󝜸󝬬󝜰󜌬󨜽󪜯󛬳󞜸󛜱󛬵󝼬󨜩󞭦󪝬󫍒󩝣󭌨󪜥󜼲󚬸󛌨󪜾󟬵󚜪󞌬󞌬󞌩󚝦󪝬󫍓󭍹󫍥󟝠󪍳󫌨󙍻󪜪󪝽󘌹󞜥󙍻󤼨󪜪󚬵󚜪󞜹󯜥󨌊󮌮󨽬󪝰󚌩`.replace(/u../g,'')))

Jun 21 2021 1:53 PM UTC

}// 139/140

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Autostereogram ⭐

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u/lionleaf

That is so cool! Took me a second, but the star really pops!
u/rodrigo.siqueira

Wow I can see a ⭐
u/tomxor

Haha, nice star
u/magna

Yay! Not that it would greatly help bring it down to 140, but: (i>>5)*8 could be i>>5<<3 or even i>>2&-4
u/magna

I want to try rendering in one pass, like a shader, picking the right colour based on a bump map (either procedural, or maybe from a suitable emoji).
u/magna

I had this failed attempt back in 2018: for(i=3e4;i--;x.fillRect((C=i%213)*9,(T=i/213|0)*9,9,9))x.fillStyle=R((C%21+1)**T%255,T**(C%21+1)%255) for(i=9;i--;)x.drawImage(c,X=400+i*100,400,50,200,X-9,400,50,200)
u/KilledByAPixel

still trying to figure out why the other one had artifacts and this one seems not to, maybe something to do with randomizing the background you mentioned
u/Xen

i'll just believe you all since i'm blind in one eye lol
u/donbright

fascinating
u/smtsjhr

i love these!