Top #fractal dweets

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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rep_movsd

function u(t) {

for(t||(O=X=Y=E=540),I=O*(t<20);I--;){E=(E+1+Math.random()*4|0)%5;[P,Q]=[O+S(A=E*1.25)*O,O+C(A)*O],x.fillRect(X+=(P-X)/2,Y+=(Q-Y)/2,.5,.5)}

Jan 1 2022 4:09 PM UTC

}// 140/140

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Pentagonal fractal

u/rep_movsd

#fractal #chaos

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rodrigo.siqueira

remix of d/15112 by u/f8f82804

function u(t) {

j=a=b=0
for(i=1e4;i--;c.style.filter=`invert(`)j-=2*S(t*i**7)**2+3,a-=(a-(j&1))/2,b-=(b*b-(j&2))/4,x.fillRect(480+960*a,840*b-130,t<1,.4)

Jun 13 2021 12:17 AM UTC

}// 137/140

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Deep bifurcation #fractal

u/Xen

nice
u/rep_movsd

Reminds me of that Hanukkah thing somehow

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tomxor

remix of d/21610 by u/rodrigo.siqueira

function u(t) {

for(c.width&=m=i=8320;i--;x.fillRect(X=i&127,Y=i>>7,1,f(X/m+.01,Y/m)))f=(x,y,n=42)=>--n&&y/(1.1+S(x+2*S(n+t)))<5?f(x*x-y*y-1.5,2*x*y,n):n/16

Feb 8 2021 3:29 AM UTC

}// 140/140

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#wavey #plant #fractal

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rodrigo.siqueira

remix of d/21434 by u/rodrigo.siqueira

function u(t) {

for(i=1080;i--;x.fillRect(a=t*120,i,2,.2-f(a/1000-1.3,i/990)))f=(X,Y,n=90)=>T(t*X)*S(Y)*2<2?f(X*X-Y*Y,2*X*Y+.7,n-=2):n/70

Jan 25 2021 2:54 PM UTC

}// 121/140

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Thorn forest #mandelbrot #fractal

u/Xen

Love it!
u/aaaaaz

#forest

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danny@hille.dk

remix of d/19821 by u/danny@hille.dk

function u(t) {

f=(X,Y,n=1.5)=>Y*Y>n?n:f(4*X*Y-.5,Y*Y-X*X,n+1);for(m=i=980;i--;x.fillRect(t*m/2%m*2,i*3,17,3))x.fillStyle=`hsl(${K=f(i/m,C(t)/3)*8},99%,50%`

Sep 18 2020 4:09 PM UTC

}// 140/140

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Weather radar remix

u/danny@hille.dk

.. or Sin()-ematic fractal viewer (never mind that I used coSinus)
u/danny@hille.dk

(original dweet: d/19818 by u/rodrigo.siqueira)
u/rep_movsd

Dormammus holiday realm :)
u/danny@hille.dk

#fractal

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danny@hille.dk

remix of d/19818 by u/rodrigo.siqueira

function u(t) {

f=(X,Y,n=98)=>Y*Y>n?n:f(4*X*Y-.5,Y*Y-X*X,n+1.2);for(i=2e3;i--;x.fillRect(i,t*60,1,1))x.fillStyle=`hsl(${K=f(i/2e3,t/45)},99%,${S(K/9)*90}%)`

Aug 31 2020 11:32 PM UTC

}// 140/140

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storm system remix

u/lionleaf

That's a cool #storm
u/rep_movsd

Looks like Chthulu devouring galaxies
u/danny@hille.dk

#fractal

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katkip

remix of d/19759 by u/katkip

function u(t) {

eval(unescape(escape`𬠽𣑡𭁨𛡲𨑮𩁯𫐻𩠽𚁘𛁙𛁮🐹𞐩🐾𦀪𦀫𦐪𦐾𜑼𯁮🀰🱮𚠹𞡦𚁘𚡙𚠲𚰮𜰹𛁘𚡘𛑙𚡙𛐮𜰬𫠭𜐩𞱦𫱲𚁩🐲𞐹𞐻𪐭𛐻𚑘👲𚁙👲𚀩𚠵𜀰𚐪𝐰𜀬𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱦𚁘𛰲𝐰𛐱𛁙𛰲𝐰𛐱𚑽𛀹𞐥𛀵𜀥𚑠𛁸𛡦𪑬𫁒𩑣𭀨𦀪𜠬𦐪𜠬𜠬𜠩`.replace(/u../g,``)))

Aug 23 2020 9:47 AM UTC

}// 134/140

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#waitforit I just graph a random recursive function until a beautiful #fractal is plotted

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rodrigo.siqueira

remix of d/14525 by u/rodrigo.siqueira

function u(t) {

for(var I=960;I--;)for(var U=P=X=I/190-3,Q=Y=t/3-1.85,k=14;k--;)U=X,X=X*X-Y*Y+P,Y=2*U*Y+Q,X*X>2?x.fillRect(I*2,t*99,2,2):x.fillStyle=R(k**2)

Jun 14 2019 2:56 PM UTC

}// 140/140

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Red rays from the Mandelbrot Set #mandelbrot #fractal

Show more comments…
u/KilledByAPixel

Amazing.
u/artfarnaa

Is there a way to make these fractal examples render faster? Perhaps offload the calculations to web assembly?
u/username

"Red rays" also known as low iteration count
u/13thptr

u/artfarnaa wasm isn't much faster than js on most platforms and it takes a lot of space to set up
u/13thptr

see u/rbong's work on it
u/katkip

i don't understand this so awesome
u/rodrigo.siqueira

Artfarnaa, it is possible to make super fast, see this pure JS fast implementation: https://csl.name/mandelbrot/ There are many tricks specifically created to calculate Mandelbrot Set (e.g. avoid calculations in a rectangle inside the main set because all pixels are white and calculations in this white area is slower than other parts), but no speed optimization were used here because of space constraints. Some tricks to make it faster: do not use time variable to do calculations (because it is max 60 fps), do not plot each pixel, but store them in an array and plot at once using c.putImageData(img)...
u/KilledByAPixel

There is one way to make it very very fast. I just made a quick shader of it for you! https://www.shadertoy.com/view/wtjGz3
u/artfarnaa

Thanks guys, great inspiration.

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pavel

function u(t) {

f=(X,Y,r,a)=>r&&x.moveTo(X+=r*S(a),Y+=r*C(a))|x.arc(X,Y,r,0,7)|f(X,Y,r>>=1,a+=S(t))|f(X,Y,r,a+3);c.width|=0;f(960,0,540,0);x.fill('evenodd')

Nov 19 2018 4:46 AM UTC

}// 140/140

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B&W Circles #beesandbombs

u/katkip

Cool #fractal but this is actually easier to make using drawImage
u/pavel

drawImage? How?
u/katkip

Look at my last fractals

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rodrigo.siqueira

remix of d/28827 by u/rodrigo.siqueira

function u(t) {

x.fillStyle=R(0,9,60)
for(A=0,X=Y=t,i=6e4;i--;x.fillRect(X*15+550,Y*13+540,.1,t<2))Y=(i/Y&1)*27+(Y-X)/2+.25/Y+S(X/9)*2,X=X+Y

Nov 8 2023 1:00 PM UTC

}// 124/140

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Roads on the Rodragon Curve #fractal

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