Top #Mandelbrot 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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pavel

function u(t) {

for(let i=1920,f=(x,n=420,a=0,b=0)=>a*a+b*b<n?f(x,n-1,a*a-b*b+x,2*a*b+.1133-t/4615):n/420;i--;)x.fillRect(i,180*t,f(i/8e5-.7467),3)

Apr 18 2020 5:59 AM UTC

}// 131/140

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(X=-0.7453, Y=0.1127, R=6.5e-4) section of the #mandelbrot set

u/pavel

This version draws 1x3 pixels to speed up rendering. for(let i=2e3,f=(x,n=420,a=0,b=0)=>a*a+b*b<n?f(x,n-1,a*a-b*b+x,2*a*b+.1133-t/13845):n/420;i--;)x.fillRect(i,60*t,s=f(i/8e5-.7467),s) looks better in fullscreen but is 3x as slow.
u/pavel

let and the automatic scoping of args in f makes this _really_ quick. I can increase the loop to 4e3 iterations and still have 60fps on my machine. Would be interesting to speed this up by rendering multiple rows per frame.
u/katkip

all dweets made by u/pavel are genius
u/Xen

godlike!
u/Qwitter

agreed !!!!

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Pascal

function u(t) {

M=(a,r=0,i=0,n=40)=>Math.abs(r+i)<n&&1<n?M(a,r*r-i*i+a,2*r*i-t/600+.0149,--n):1-n/30;for(i=1920;i--;)x.fillRect(i,t*120,M(i/64e3-1.6)**.5,2)

Jan 23 2021 7:42 PM UTC

}// 140/140

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#mandelbrot forest

u/magna

Lovely!
u/smtsjhr

nice one!
u/Xen

nice
u/Qwitter

That's Awesome! Escape Time in the MandelBrot Forest for rest.

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iverjo

remix of d/894 by u/iverjo

function u(t) {

for(j=1080;j--;x.fillRect(T=frame,j,1,S(k/9),x.fillStyle=R(k,j,T)))for(a=b=0,k=35;k--&&a*a+b*b<4;a=c)c=a*a-b*b+T/540-2,b=2*a*b+j/540-1

Mar 10 2018 12:28 PM UTC

}// 134/140

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Golfed version of the color mandelbrot

u/DirtyDan

I'm a sucker for Mandelbrot dweets. Bravo!
u/iverjo

#mandelbrot
u/iverjo

#fractal
u/iverjo

#slow_render
u/Qwitter

escape time !

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whackashoe

function u(t) {

for(Y=48;--Y;)for(X=99;--X;){for(A=H=-2+X*.03,B=G=-1.2+Y*.05,n=0;++n<t;C=A*A,E=B*B,B=2*A*B+G,A=C-E+H);if(C+E>4)x.fillRect(X*19,Y*19,t,t)}

Jan 11 2018 12:05 AM UTC

}// 137/140

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u/Xen

clever approach.
u/Talesseed

Nice one,
u/Talesseed

Nice one!
u/joeytwiddle

#mandelbrot

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geb

function u(t) {

for(k=0;k<999;k++){a=h=t/8-2;b=i=k/480-9/8
for(n=0;a*a+b*b<4&&n<64;n++)q=a,a=a*a-b*b+h,b=2*q*b+i
x.fillStyle=R(2**n);x.fillRect(t*64,k,k,2)}

Jul 24 2018 11:58 AM UTC

}// 140/140

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Show more comments…
u/DataMeta

Niiiiice! #fractal
u/zanella

#mandelbrot
u/zanella

#mandelbrot
u/Xen

Very Nice Style
u/aleamb

#fractal
u/joeytwiddle

Nice #mandelbrot #fractal
u/katkip

Noyce.

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magna

function u(t) {

t||(w=c.width=192)
for(h=54,i=w;i--;x.fillRect(i,R,1,j/w))for(R=t*39|0,X=i/h-2.4,Y=R/h-1,a=b=0,j=w;a*a+b*b<5&&j--;)[a,b]=[a*a-b*b+X,2*a*b+Y]

Oct 22 2021 3:06 AM UTC

}// 140/140

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#mandelbrot #glitch

u/magna

My first attempt to draw a Mandelbrot fractal, straight from the reference implementation from Wikipedia. Still need to learn lots of size/speed hacks, apparently :)
u/KilledByAPixel

congrats!
u/Toby

nice!

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rodrigo.siqueira

remix of d/23279 by u/rodrigo.siqueira

function u(t) {

for(i=c.width=256;i--;)for(j=144;j--;x.fillRect(i,j,k*S(a+t),2/k))for(a=b=0,k=19;k--&&a<j;a=q)q=3*a*a-C(T(a+t)/j)*b*b+i/160-1,b=a*b*6+j/72-1

Apr 11 2022 8:27 PM UTC

}// 140/140

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Mandelnoise #mandelbrot #fractal

u/magna

AWESOME!
u/ciaccodavide

wow

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rodrigo.siqueira

remix of d/23275 by u/rodrigo.siqueira

function u(t) {

for(i=c.width=256;i--;)for(j=142;j--;x.fillRect(i,j,1,k/12))for(a=b=0,k=19;k--&&a<j;)q=3*a*a-(S(b+t*5)+1)*b*b+i/160-1,b=a*b*5+j/99-.7,a=q

Jul 2 2021 7:11 PM UTC

}// 137/140

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Animated #mandelbrot rays

u/magna

wowza
u/erin

top tier

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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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Lerkel

function u(t) {

for(w=S=1920;--S;I>0&&x.fillRect(i%w,i/w,1,1))for(i=Math.random()*w*w,I=32,Z=530,y=z=0;y*z<S*I--;z=2*_*z+(i/w/Z-1))_=y,y=y*y-z*z+(i%w/Z-2)

Aug 16 2020 9:47 PM UTC

}// 138/140

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randomly sampled mandelbrot set (thanks u/jgobi for fitting it in 140 chars!)

u/katkip

#mandelbrot

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