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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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rodrigo.siqueira

remix of d/11562 by u/echo85

function u(t) {

for(I=1e3;I--;){for(X=I/250-3,Y=t/2-1.5,T=12;T=T-1;)U=X,X=X*X-Y*Y+I/250-3,Y=2*U*Y+t/2-1.5
X>1&&(x.fillRect(I*1.6,t*180,3,3))}

Jun 10 2019 3:01 AM UTC

}// 125/140

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Mandelbrot set with different border #mandelbrot #fractal

u/Xen

Love it!

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katkip

remix of d/13406 by u/katkip

function u(t) {

x.translate(960,440);x.font='4cm"';x.fillText("1337",0,0)
x.rotate(Math.PI*2/5)
x.drawImage(c,200,300,1560,620)

Apr 23 2019 2:22 PM UTC

}// 111/140

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#fractal

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katkip

remix of d/13404 by u/katkip

function u(t) {

x.translate(960,440);x.font='4cm"';x.fillText("KATKIP",400,600)
x.rotate(Math.PI*2/3)
x.drawImage(c,390,300,900,500)

Apr 23 2019 2:16 PM UTC

}// 116/140

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#sierpinski made of "katkip" #fractal

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rodrigo.siqueira

remix of d/12336 by u/pavel

function u(t) {

for(a=b=i=800;i--;x.fillRect(270*(t&7)+99*a,1e3-99*b,1,1))r=Math.random(),[a,b]=r<.86?[.8*a,.9*b+.9]:r<.93?[-b/3,a+b/4]:[b/3,a/3+b/3+1]

Feb 14 2019 6:53 PM UTC

}// 135/140

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Forest of trees. Barnsley #fern is an example of an Iterated Function System (IFS) to create a #fractal.

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katkip

remix of d/11595 by u/katkip

function u(t) {

eval(unescape(escape`挮獴祬攮扡捫杲潵湤㵒⠩Ⱳ㴨堬夬猩㴾筩昨猾㌩砮晩汬却祬攽恨獬⠤筳⩴紬㤰┬㐰┩怬砮晩汬剥捴⡘⵳ⱙ⵳ⱳ⨲ⱳ⨲⤬爨堭猬夭猬猯㈩Ⱳ⡘⵳ⱙ⭳ⱳ⼲⤬爨堫猬夭猬猯㈩Ⱳ⡘⭳ⱙ⭳ⱳ⼲⥽㭲⠹㘰ⰵ㐰ⰴ㠰⤻`.replace(/u(..)/g,"$1%")))

Dec 31 2018 11:36 AM UTC

}// 138/140

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T-square #fractal #recursion #recursive #rainbow

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rodrigo.siqueira

function u(t) {

F=n=>(f=(n,t=n&&f(n-1),r=t[0])=>n?[r+r+r,...t.map(x=>x+t[n]+x)]:['█','░'],f=f(n),f.pop(),f).join`\n`
throw(F(3))

Dec 24 2018 10:15 PM UTC

}// 112/140

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Cantor Set #fractal #unicode

u/katkip

haha nice

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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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rodrigo.siqueira

remix of d/29130 by u/rodrigo.siqueira

function u(t) {

for(t?Y++:Y=0,X=3e3;X--;x.fillRect(X,Y,1,f(X/2e3-.6,Y/1500)))f=(x,y,n=0)=>y?f(x*x-y*y,T(.8*x*y)*3+.6,n+1):C(n/3-t/3)/2+.5

Dec 15 2023 12:33 PM UTC

}// 121/140

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16-arm superspiral #fractal #spiral

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rodrigo.siqueira

function u(t) {

f=n=>Math.abs(n-Math.round(n))
for(X=1920;X--;){
 Y=1
 for(k=9;k--;){
  Y-=(Math.abs(f(2**k*X/1918))/2**k)
 }
 x.fillRect(X,Y*999,2,9)
}

Aug 7 2023 2:20 PM UTC

}// 136/140

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Blancmange curve (Takagi curve) #fractal

u/rodrigo.siqueira

Based on the discussion: "Unexpected link between pure mathematics and genetics." https://news.ycombinator.com/item?id=37011776
u/rodrigo.siqueira

This fractal curve described by Teiji Takagi in 1901 is constructible by midpoint subdivision. It's called the blancmange curve, because it looks like the French pudding dessert. Implementated here from the "blanc(x)" function: https://en.wikipedia.org/wiki/Blancmange_cur…

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rodrigo.siqueira

remix of d/27272 by u/rodrigo.siqueira

function u(t) {

for(v=218;v--;)
for(a=b=0,i=9;i--;){
f=a*b,
a=a*a-b*b-2+(h=i*S(t*5)*S(v/9)+t*20)/99
b=2*S(f)+v/80-1.4
x.fillRect(h*6,5*v,1,b)
}

Mar 29 2023 12:35 AM UTC

}// 128/140

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Mandelbrot Printer #mandelbrot #fractal

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