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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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pavel

remix of d/18322 by u/pavel

function u(t) {

for(let i=1920,f=(x,y,n=256)=>x*y<n?f(x*x-y*y-.8,2*x*y+.156,n-1):1-n/256;i--;x.fillRect(i,t*180,1,3))x.globalAlpha=f(i/540-16/9,1-t/3)

Apr 18 2020 8:32 AM UTC

}// 134/140

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#julia set for c = −0.8 + 0.156i

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u/pavel

Using x*y<n instead of the normal n&&x*x+y*y<2 is much shorter and creates the black whisps that look pretty cool.
u/pavel

This version makes it easy to play with different values of c. You can find some in https://en.wikipedia.org/wiki/Julia_set#Quad…
u/pavel

https://en.wikipedia.org/wiki/Julia_set#Quad…
u/pavel

Is link pasting broken?
u/Xen

Sexy!
u/katkip

wow
u/katkip

https://en.wikipedia.org/wiki/Julia_set
u/rodrigo.siqueira

Awesome and fast. I am remixing it to add color schemes and colorization methods.
u/Qwitter

SO FAST!

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rodrigo.siqueira

remix of d/18979 by u/rodrigo.siqueira

function u(t) {

for(let i=2e3,f=(X,Y,n=17)=>Y?f(X*X-Y*Y,3*Y*X-.6,n-.3):x.fillStyle=`hsl(${n*4},99%,${n**2}%`;i--;x.fillRect(i,t*60,1,9))f(i/3e4,.84-t/300)

May 29 2020 12:38 AM UTC

}// 138/140

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The Great Spiral from Chaos #spiral #julia #fractal

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rodrigo.siqueira

remix of d/18551 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=(X,Y,n=0)=>X*X<9||Y<9?f(X*X-Y*Y-.4,2*X*Y-.7,n+2.5):x.fillStyle=`hsl(0,75%,${n}%`;i--;x.fillRect(i,t*60,1,999))f(i/480-2,1-t/9)

Apr 30 2020 1:52 AM UTC

}// 138/140

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#Fractal star filaments from #Julia set

u/aleamb

wow! amazing!
u/PoweredByWill

Wow. Why does this remind me of the credits from Total Recall?

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ntsutae

remix of d/19763 by u/rodrigo.siqueira

function u(t) {

f=(X,Y,n=0)=>X*X+Y*Y>4?n:f(2*X*Y-.8,S(Y*Y-X*X)*1.11-.21,n+6);for(i=w=2e3;i--;x.fillRect(i,Y,1,1))Y=t*60,x.fillStyle=R(g=f(i/w,Y/w),g,g)

Oct 9 2020 3:03 PM UTC

}// 135/140

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#julia #fractal

u/katkip

thunder
u/Xen

sexy!
u/ntsutae

I happended to put S() on Y*Y-X*X
u/dull_pixel

#storm

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KilledByAPixel

remix of d/12331 by u/pavel

function u(t) {

eval(unescape(escape`𫱮𫑯𭑳𩑭𫱶𩐽𩐽🠨𨰮𭱩𩁴𪁼👓👃🐰𛁔👥𚐻𩡯𬠨𪠽𜑥𜰻𪠭𛐻𮀮𩡩𫁬𤡥𨱴𚀹𝐷𚰴𝐰𚡓𛀵𜰷𚰴𝐰𚡃𛀵𛀵𚐩𬰽𣑡𭁨𛡲𨑮𩁯𫐨𚐼𛠵🰭𜐺𜐬𠐽𚁍𨑴𪀮𪁹𬁯𭀨𤰫👔𛡸𛰲𞀴𛐱𛁃𚰽𥀮𮐯𜐶𜀭𜐩𚱓𚐯𜠬𠰽𚁃🀰🰭𬰺𬰩𚠨𠐭𤰩𚠪𛠵𛁓👳𚡁𚠪𛠵`.replace(/u../g,'')))

Jul 9 2019 5:20 PM UTC

}// 137/140

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#julia set explorer ~ Use the mouse to control!

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u/katkip

Cool! #compressed
u/donbright

woohoo!
u/stefano

Rookie question.. Is this using Web Assembly? If so, how do I get started?
u/metamero

replace eval with throw to see uncompressed JS code
u/stefano

Awesome, thanks
u/katkip

beautiful
u/KilledByAPixel

Thank you, but pavel did the hard part.
u/aleamb

#interactive #fractal
u/lud

Dragon curve?

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etheranger

function u(t) {

j=(d,L,M)=>d*M?j(d-1,L*L-M*M+.4,2*L*M+S(t)):d
for(p=0;U=p%214,V=p++/214,x.fillStyle=R(j(30,U/25-4,V/25-2)*9),V<99;)x.fillRect(U*9,~~V*9,9,9)

Dec 29 2017 1:46 PM UTC

}// 140/140

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u/Xen

nice
u/sigveseb

Lags a bit but very good
u/etheranger

There are a few improvements/optimisations I could do with a few more bytes, anyone have golf suggestions?
u/Flopster

Nice! I was wondering when a Julia set would turn up here.
u/joeytwiddle

#fractal #julia

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rodrigo.siqueira

remix of d/19764 by u/rodrigo.siqueira

function u(t) {

f=(X,Y,n=222)=>Y*Y>n?n:f(2*X*Y-.6,Y*Y-X*X+.2,n-1);for(i=2e3;i--;x.fillRect(i,t*60,1,1))x.fillStyle=`hsl(${K=f(i/2e3,t/35)},90%,${T(K)*29}%)`

Aug 30 2020 8:12 PM UTC

}// 140/140

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Deep chaos #julia #fractal

u/taupelink

amazing
u/sigveseb

Ooh very nice!
u/magna

So pretty!

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rodrigo.siqueira

remix of d/18999 by u/rodrigo.siqueira

function u(t) {

for(let i=2e3,f=(X,Y,n=9)=>Y?f(X*X-Y*Y,2*X*Y+.65,n+.15):x.fillStyle=`hsl(${n},80%,${80*C(n)}%`;i--;x.fillRect(i,t*90,1,99))f(i/3e3-1,1-t/25)

Jun 7 2020 8:10 PM UTC

}// 140/140

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red zoom #julia #fractal

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rodrigo.siqueira

remix of d/18440 by u/rodrigo.siqueira

function u(t) {

for(let i=2e3,f=(X,Y,n=59)=>X*Y<n&&f(X*X-Y*Y-.8,2*X*Y+.2,n-1,x.fillStyle=R(C=(X<Y)*i/Y,C/3));i--;x.fillRect(i,t*180,1,3))f(i/490-2,1-t/3)

Apr 28 2020 5:10 PM UTC

}// 137/140

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Orange black #Julia set #fractal

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tomxor

remix of d/18338 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`𭀿𪰽𭀪𚠸𞡷👣𛡷𪑤𭁨🐹𞐻𩠽𚁘𛁙𛁮👷𚐽🡘🁮🱦𚁘𚡘𛑙𚡙𛐮𞀬𜠪𦀪𦐫𛠲𛁮𚰱𚐺𨁨𬱬𚀤𮱮𚠸𯐠𞐹𙐤𮱓𚁮𛰶𚡴𚠪𛠵𚐪𭱽𙑠𞱦𫱲𚁩🐶𩐳𞱩𛐭𞱸𛡦𪑬𫁓𭁹𫁥👦𚀨𦀭𝐰𚱫𚐯𪰭𜠭𜰶𜠱𞀵𩐭𞀬𜐭𚁙𛐲𞀫𪰩𛱫𚐩𮀮𩡩𫁬𤡥𨱴𚁘👩𙑷𛁙👩𛱷𛀱𛀮𜠩`.replace(/u../g,'')))

Apr 20 2020 12:53 AM UTC

}// 140/140

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Color #zoom #julia #fractal using "X<i"

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u/tomxor

For zoom without slowing down use k=t**t, but you will need very precise coordinates. Here are some other coords I found: f((X-50+k)/k+5100096e-9,1-(Y-28+k)/k), f((X-50+k)/k-2,1-(Y-28+k)/k+201113e-7)
u/tomxor

Oops, hitting subpixel rendering differences again... intended for firefox, chrome looks a bit too mushy, change fill pixel to .3 for chrome.
u/joeytwiddle

Pretty nice! 😻
u/13thptr

amazing
u/tomxor

Due to subpixel rendering differences, for Chrome: see d/18346
u/Joachim

Wow! #underrated #colourful How did you make it infinite? Whenever I’ve tried making a Mandelbrot it always pixelates after the first few seconds of zoom ing in.

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