New #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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dwardu

function u(t) {

r=n=>(Math.random()*n|0)*96
x.drawImage(c,r(19),r(10),192,192,r(20),r(11),w=96,w)
x.fillStyle=R(z=r(2)**2,z,z)
x.fillRect(r(20*9),r(11),w,w)

Mar 1 2018 8:03 PM UTC

}// 140/140

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Splits 1920px×1056px canvas into 20×11 grid of 96px×96px tiles. Once every 9 frames fills a random tile black or white. Every frame picks a random 2×2 group of tiles and draws it onto a random 1×1 tile at ½ the size.

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yonatan

function u(t) {

c.width|=0
a=(s,A,g,h)=>s<4?[]:[g=s*S(A),h=s*C(A)].concat(a(s*.9,A+t),a(s*.4,A-t),-g,-h)
x.stroke(new Path2D('M960 99l'+a(199,0).join(' ')))

Jan 26 2018 5:44 AM UTC

}// 140/140

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u/zanella

Great!! Love fractals!! Also, I was hoping to see more dweets using Path2D, I think there's lots os great possibilities in there.
u/sigveseb

Very nice! And shh, Path2D is the hidden secret of the canvas api :D
u/sigveseb

But yeah, can't wait to see more Path2D dweets :)
u/iverjo

#fractal #recursive
u/f8f82804

#path2d
u/vain

just wonderful !

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@no_identd

remix of d/4509 by u/ben

function u(t) {

function v(a,b,g,r){if(r>1){x.fillRect(a+=r*S(g),b-=r*C(g),.1,1)
v(a,b,g-1+C(t),r*=.7634541)
v(a,b,g+.1+S(t),r)}}c.width=540
v(250,270,0,80)

Jan 17 2018 2:00 PM UTC

}// 140/140

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Renaud___

remix of d/1035 by u/Renaud___

function u(t) {

y=355/339;b=0;t?0:f=h=i=g=210;while(b++<50){d=1-++f/2e5;for(e=4,z=2;z<3e3;z*=4)f%z==z/2?e=1:0;i+=e;x.fillRect(g+=d*C(y*i),h-=d*S(y*i),2,2)}

Jan 16 2018 12:51 AM UTC

}// 139/140

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u/Xen

love it!
u/dogspace

very nice koch fractal
u/katkip

#koch #fractal
u/rodrigo.siqueira

#snowflake

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Talesseed

remix of d/6011 by u/Talesseed

function u(t) {

a=0|60*t%60
for(n=z=w=0;n++<256&z*z+w*w<4;[z,w]=[z*z-w*w+a/20-2,2*z*w+~~t/20-1])x.fillStyle=R(g=256,g-3*n,g),x.fillRect(a*25,~~t*25,25,25)

Jan 14 2018 2:34 PM UTC

}// 138/140

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2 characters shorter

u/iverjo

#mandelbrot #fractal

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Jezza

remix of d/5896 by u/Moosething

function u(t) {

x.globalCompositeOperation='xor';
x.fillRect(frame%1920,1079,1,1)
x.drawImage(c,-1,-1)
x.drawImage(c,1,-1)

Jan 12 2018 11:17 AM UTC

}// 106/140

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Show more comments…
u/zanella

You got my Awesome when I switched to fullscreen. Gorgeous, great job!
u/loni_art

feels like a carpet!
u/magna

Great!
u/sigveseb

yes this is good! neeeds fullscreen though!
u/breakster

I don't know this fractal. What is it called?
u/iverjo

Wow!
u/J2D28U

Its like a persian carpet or something...
u/Jezza

@breakster, I don’t know if it has a name - I was just messing about with Moosething’s dweet.
u/BirdsTweetCodersDweet

#fractal #carpet #generator #fullscreen

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zanella

remix of d/5860 by u/zanella

function u(t) {

m=h=960;n=v=540;s=0;for(i=2e3;i--;){s=(s+1+4*Math.random()|0)%5;o=1.26*s;m=(m+h+v*C(o))/2;n=(n+v+v*S(o))/2;x.fillRect(m,n,1,1)}

Jan 10 2018 8:39 PM UTC

}// 127/140

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Chaos games are fun! https://en.wikipedia.org/wiki/Chaos_game

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p01

function u(t) {

for(c.width=n=128;n-=r=i=1/64;x.fillRect(n%2*64,n/2,k/32,1))for(Y=1-n*i,X=n%2-1,k=32;--k/r;i=j)j=2*r*i+X*S(t)-Y*C(t),r=r*r-i*i+Y*S(t)+X*C(t)

Jan 3 2018 9:41 PM UTC

}// 140/140

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Spinning Mandelbrot set

u/magna

We're going to need a bigger CPU.
u/iverjo

Nice effect! 22 FPS on my machine, in Firefox. Surprisingly, it runs much slower in Chrome and Edge (4 FPS)
u/sigveseb

Screeching by at 4FPS on my machine too :D nice mandelbrot though
u/donbright

feel like standing up and applauding. unbelievable.
u/rodrigo.siqueira

#mandelbrot #fractal

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Xen

remix of d/4665 by u/ben

function u(t) {

v=(a,b,g,r)=>{for(i=0;i++<r;)x.fillRect(a+=S(g),b-=C(g),r/9,2)
r>1?v(a,b,g+=S(t/2),r*=.7)&v(a,b,g+=C(t)*6,r):0}
c.width=400
v(200,230,0,64)

Dec 29 2017 3:53 PM UTC

}// 139/140

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had to have a play with it, shoutz to ben.

u/ben

windy! I prefer the more tranquil scene...
u/Xen

i live in england, the weathers crap!
u/joeytwiddle

#fractal #tree Are you originally from England Xen? I saw a picture of you once and you looked cooler than that ... maybe Spanish?

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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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