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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pavel

remix of d/8622 by u/leSchieber

function u(t) {

f=frame;(d=(a,b,n,r,m=n/2)=>{a-=m;b-=m;--r&&d(a,b,m,r)&d(a+n,b,m,r)&d(a,b+n,m,r)&d(a+n,b+n,m,r);--f||x.fillRect(a,b,n,n)})(960,540,500,7)

Oct 24 2018 9:08 AM UTC

}// 137/140

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u/katkip

#fractal
u/BirdsTweetCodersDweet

Awesome! Looks like a #hilbert_curve
u/katkip

Yeah but it is actually something like #sierpinski carpet
u/katkip

nvm, it's Vicsek's fractal

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ersagun

function u(t) {

t*=60;i=j=0;for(s=8;u=1&(t/2),v=1&(t^u),(s*=2)<513;t/=4){if(!v){if(u==1)i=s-16-i,j=s-16-j;z=i;i=j;j=z}i+=s*u,j+=s*v}x.lineTo(i,j),x.stroke()

Oct 21 2018 10:36 PM UTC

}// 140/140

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Hilbert curve

u/aleamb

love it!
u/aleamb

#hilbert #fractal
u/pavel

Shaved off 16 chars: for(t*=60,i=j=0,s=8;u=t&2?1:0,s*=2,s<513;t/=4,i+=s*u)1&t^u?j+=s:(u&&(i=s-16-i,j=s-16-j),i+=j-(j=i));x.lineTo(i,j);x.stroke()

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rbong

remix of d/10574 by u/rbong

function u(t) {

for(n=200;n-=1/64;x.fillStyle=`hsl(${t*k*30},99%,50%)`,x.fillRect(n%3*666,n*5,16,16))for(r=i=0,k=28;--k/r;i=j)j=2*r*i+1-n/99,r=r*r-i*i-(n%3)

Oct 21 2018 3:46 PM UTC

}// 140/140

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Rainbow Cycling Mandelbrot

u/rbong

#rainbow #fractal #mandelbrot
u/rbong

This version has true color cycling, an animated Julia set, and is centered, but it's 18 characters over:
u/rbong

for(n=200;n-=1/64;x.fillStyle=\`hsl(${t*999+k*22},99%,50%)\`,x.fillRect(n%3*666,n*5,16,16))for(r=C(t*3),i=S(t*4),k=28;--k/r;i=j)j=2*r*i+1-n/99,r=r*r-i*i+1-(n%3)

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rbong

remix of d/697 by u/p01

function u(t) {

for(n=210;n-=1/64;x.fillStyle=`hsl(${k*22},99%,50%)`,x.fillRect(n%3*666,n*5,16,16))for(r=C(t),i=S(t),k=28;--k/r;i=j)j=r*i-n/99,r=r*r-i*i-n%3

Oct 20 2018 5:53 PM UTC

}// 140/140

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Rainbow Fractal Slice

u/rbong

#fractal #rainbow
u/prplz

#heavy
u/rbong

Looks a bit heavier than the original because I had to slow it down, but it's the same intensity. I would like to make a faster Mandelbrot/Julia set. This is closer to the original effect:
u/rbong

c.width|=0;for(n=200;n-=1/64;x.fillStyle=hsl(${k*22},99%,50%),x.fillRect(n%3*666,n*5,16,16))for(r=C(t*3),i=S(t*4),k=28;--k/r;i=j)j=2*r*i+1-n/99,r=r*r-i*i+1-n%3
u/rbong

Insert backticks where the style changes in that comment, I can't edit it

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yonatan

function u(t) {

c.width=-1
f=(u,v,a,r)=>r<1?x.lineTo(u,v):f(u+S(a)*r,v+C(a)*r,a*(z=0|t)+t/z,r/3)
for(i=1e3;i--;)j=i*2*Math.PI/999,f(150,84,j,55)
x.stroke()

Oct 17 2018 6:43 AM UTC

}// 139/140

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u/BalintCsala

What a coincidence https://math.stackexchange.com/questions/183…
u/yonatan

Wow! that's exactly how this works (circles around circles around circles)
u/katkip

Awesome
u/joeytwiddle

Yeah these wobbly circles are cool #spirograph #pattern
u/katkip

this is a low iteration #fractal

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pavel

function u(t) {

t||(i=a=n=0,j=1e3,f=n=>n&&f(n>>1)-n&1)
for(z=n<4e4&&44;z--;)f(n++)?x.fillRect(i-=.88*C(A=a*Math.PI),j+=.88*S(A),2,2,a+=1/3):a--

Oct 15 2018 9:39 PM UTC

}// 127/140

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Koch curve #fractal

u/pavel

This is a turtle graphic, the function f(n) implements the Thue–Morse sequence

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rbong

function u(t) {

for(Y=3;Y-=1/64;)
  for(X=3;X-=1/64;){for(r=i=0,c=10;r*r+i*i<=4&&c--;)_=r*r-i*i+X-2,i=r*i*2+Y-1,r=_;c&&x.fillRect(X*500,Y*500,8,8)}

Oct 13 2018 3:25 PM UTC

}// 132/140

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Very Slow Mandelbrot

u/rbong

#mandelbrot #fractal
u/rbong

I didn't see many other mandelbrots so I thought I'd do it. Sorry for the CPU hog!

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katkip

remix of d/894 by u/iverjo

function u(t) {

i=frame;for(j=1080;j--;){a=b=0;for(k=35;k--&&a*a-b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillStyle=R(0,k);x.fillRect(i*2,j,C(k)*2,5)}

Sep 27 2018 2:24 PM UTC

}// 140/140

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Mandeldistort #mandelbrot #slow_render #scanline #fractal

u/katkip

#waitforit it actually gets better than I expected
u/joeytwiddle

Nice fresh style

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yonatan

remix of d/10016 by u/yonatan

function u(t) {

p=22/21
c.width|=f=(u,v,a,s,i=3)=>s<9?x.lineTo(u,v):i&&f(u+S(b=a+i*p*2)*s,v+C(b)*s,b/2,s**.87)|f(u,v,a,s,i-1)
f(z=750,0,1+t%2*p,z)
x.fill()

Sep 24 2018 3:27 PM UTC

}// 139/140

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Under the tree

u/yonatan

#organic #tree #fractal

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katkip

remix of d/10045 by u/katkip

function u(t) {

a=t*60%60;for(n=z=w=0;n++<99&z*z+w*w<4;[z,w]=[z*z-w*w+a/20-2,n*z*w+~~t/20-1])x.fillStyle=`hsl(${n*n},99%,50%)`,x.fillRect(a*32,~~t*27,32,27)

Sep 23 2018 1:28 PM UTC

}// 140/140

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Brainbrot #fractal

u/iverjo

#scanline

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