Top #sierpinski 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) {

c.width|=f=(X,Y,r=Y,i=r>9&&3)=>{for(x.fillRect(X,Y,s=r<10&&12,s);i--;)f(X+r/2*C(a=23*i+t*C(i)),Y+r/2*S(a),r/2)}
f(960,540)

Mar 27 2020 6:17 AM UTC

}// 122/140

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Why can't you just be normal #sierpinski ?

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u/pavel

I have no idea why this works. I was messing around with something else and then a sierpinski triangle popped out and started spinning around...
u/xem

love the explanation ^ :D
u/katkip

nice
u/pavel

I think I figured it out. If you set s=12 the structure becomes more apparent. +t*C(i) doing SO MUCH WORK is an amazing accidental find.
u/pavel

This certainly looks like a 2d projection of something 3d, how to get the depth information?
u/pavel

The trick is to rng three 2d vertices and smoothly vary them. Every combination uniquely maps to a valid 2d projection of a 3d plane so our brains infer the 3d shape.
u/pavel

for(c.width|=i=3;i--;x.lineTo(960+500*S(i*t),540+500*S(i+t)));x.fill()

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Xen

remix of d/5896 by u/Moosething

function u(t) {

t?x.globalCompositeOperation='xor':z=1
x.fillRect(0,!x.drawImage(c,z*=-1,1),1,z)

Oct 22 2019 6:44 PM UTC

}// 80/140

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80byte remix

u/Xen

#gameoflife #sierpinski

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katkip

remix of d/13405 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,-t,+t,990,520)

Apr 23 2019 2:18 PM UTC

}// 114/140

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#sierpinski made of "katkip" #fractal

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PotatoImaginator

function u(t) {

c.width=512
c.style.background='#000'
for(i=256;i--;)for(j=0;j<8*t;j++)
x.fillStyle=R(255-2*j,0,2*j),!(i&j)&&x.fillRect(2*i+j,2*j,2,2)

Mar 8 2023 1:16 AM UTC

}// 134/140

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Sierpinski Triangle #sierpinski #fractal

u/PotatoImaginator

Golfed with the help of Tomxor

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donbright

function u(t) {

質=(n)=>{for(j=2;j<n;j++){if (n%j==0)return n}return 0}
格=7
for(X=299;X--;)
for(Y=299;Y--;)
if (質(X&Y)) x.fillRect(格*X,格*Y,格,格)

Sep 19 2021 5:40 PM UTC

}// 128/140

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Prime fun 1 / 3 - This is the standard X&Y (binary AND) Sierpinski triangle picture but only where X & Y is a prime number. perhaps revealing a relationship between primes and binary AND #math #primes

u/donbright

(note white = X&Y is prime, black = X&Y is composite)
u/andrea270872

this is really nice. retro and mathsy at the same time!
u/donbright

#Sierpinski

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rodrigo.siqueira

remix of d/23469 by u/rodrigo.siqueira

function u(t) {

for(c.width=w=417,d=new ImageData(w,w),m=w*w,i=-1;m--;d.data[i+=4]=i*Y*w&w+t*m*w&i+9e8)X=m-t*5e4,Y=m%w&w+X/w
x.putImageData(d,0,0)

Aug 10 2021 12:02 PM UTC

}// 130/140

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#sierpinski static noise

u/magna

Very nice noise

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rodrigo.siqueira

remix of d/23431 by u/rodrigo.siqueira

function u(t) {

for(Y=t/9-1,i=2e3;i--;x.fillRect(i,60*t,1,1))r=((X=i/540-1.8)*X+Y*Y)/99,x.fillStyle=`hsl(${(K=T(Y/r|X/r*2))*t},75%,${1e3*r*K}%`

Jul 30 2021 12:41 PM UTC

}// 127/140

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Inverted #sierpinski color remix 3

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aemkei

remix of d/19202 by u/aemkei

function u(t) {

for(o=i=4059;i--;)o+=i%127<64?' ':i&i/64?'_':0;throw o

Jun 20 2020 9:40 PM UTC

}// 54/140

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#sierpinski 54

u/aemkei

Based on https://xem.github.io/codegolf/miniasciiserp…
u/katkip

welcome back to dwitter :)

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NotGate

function u(t) {

c.width|=f=(X,Y,Z,d,o=d<7&&4)=>{for(x.fillRect(960+1e3*X/Z,1e3*Y/Z,5,5);o--;f(X+R*C(a=S(t)*2*o),Y+R,Z+R*S(a),d+1))R=o&&2**-d};f(0,0,2,1)

Jun 5 2019 6:21 PM UTC

}// 136/140

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u/joeytwiddle

Nice #d3 #sierpinski #fractal
u/13thptr

#tetrahedron

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joeytwiddle

remix of d/531 by u/BriSeven

function u(t) {

for(i=600;i--;x.fillRect(X=X+400+c*600>>1,Y=Y+1076*(1-c&1)>>1,4,4),H=H+400*(c+t)>>2)c=(i*t^i)%3,t?x.fillStyle=`hsl(${H},50%,50%)`:X=Y=H=0

Aug 21 2017 4:02 PM UTC

}// 137/140

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Sierpinksbow

Show more comments…
u/joeytwiddle

i*t^i is a poor but short PRNG
u/sigveseb

Upvote for the colors
u/BriSeven

fantastic
u/joeytwiddle

I forgot to brighten the dull colors. Try 90%,60%
u/donbright

my new favorite sierpinski
u/joeytwiddle

Big brother: https://www.dwitter.net/d/3458
u/joeytwiddle

Another with colour: d/2668
u/iverjo

#sierpinski
u/CocoMeister

#fractal
u/joeytwiddle

#rainbow

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