New #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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HellMood

function u(t) {

z=256;t=z-z*t%73;t*=t/6e4;for(i=99;i--;)for(k=56;k--;)x.fillStyle=R(((i-k/2)*t&k*t)*z,z,z),x.fillRect(i*19,k*19,11,11)

May 8 2020 11:49 PM UTC

}// 118/140

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Zoompinski

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u/HellMood

Hard to trade resolution, speed, zoom smoothness and space against each other ;)
u/sigveseb

Nice!
u/HellMood

#sierpinski
u/bandaloo

how does a sierpinksi triangle come out of that expression in R? i do not understand
u/joeytwiddle

bandaloo, you can get a Sierpinski out of i&k binary and
u/bandaloo

thanks joeytwiddle. i did some research after this and learned a lot

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pavel

remix of d/18074 by u/pavel

function u(t) {

c.width|=f=(X,Y,d,z=2+X*S(a=Y-4*t))=>d>>8?x.fillRect(960+1e3*X*C(a)/z,540+1e3*Y/z,6,6):[t,t+2,t+4].map(i=>f(X+C(i)/d,Y+S(i)/d,2*d));f(0,0,2)

Mar 28 2020 3:27 AM UTC

}// 140/140

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#sierpinski dance

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u/sigveseb

Very clean!
u/DataMeta

So smooth!
u/aleamb

wow! very smart code!
u/lionleaf

What an amazing dweet. And little did you know I had already planned #dancing as the theme for April. You were ahead of the times :D
u/joeytwiddle

Nice! Here is a dirtier, underrated relative: d/13611
u/Qwitter

looks glossy!
u/vain

Very nice and smooth 3D rotated and transformed sierpinski

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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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Layl

function u(t) {

w=960;if(!t){c.width=w}a=x.getImageData(0,t*60,w,1);d=a.data;for(i=0;i<w*4;i+=4)if((d[i-1]&1^d[i+3]&1)||!t)x.fillRect(i/4,t*60.0+1.0,1,1);

Feb 17 2020 6:32 PM UTC

}// 138/140

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RuleX3 #growth

u/Xen

nicely! :-)
u/Xen

#sierpinski

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iznax

remix of d/17503 by u/iznax

function u(t) {

eval(unescape(escape`𩡯𬠨𪐽𜀻𬀽𚁫👩𙠶𜰩𛰲𜀬𣰽𚁪👩🠾𝠩𛰱𝀬𨐽𚁪𚱴𚠲𝐩𙠱𜠷𛀫𚱩🀲𞀰𜀻𮀮𩡩𫁬𤡥𨱴𚀹𝠰𛑃𚁏𚐪𤰨𬀩𚠵𜀰𛀵𝀰𚱃𚁰𚐪𝐰𜀬𝀹𛀲𝀩𚑸𛡦𪑬𫁓𭁹𫁥👒𚁧👓𚁡𙡫𚐪𞀰𚠨𜠮𞀭𣰩𚠨𚁡𛐴𜠩𚠪𜠫𚁫𛐴𜠩𚠪𜠼𝐶🰮𜠺𜐩𛁧𛁧𛀮𝐩`.replace(/u../g,'')))//iznax

Feb 8 2020 4:23 AM UTC

}// 140/140

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Star-Killer-Alpha

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pavel

function u(t) {

for(x.beginPath([X,Y=X,r=X]=t?d.shift():d=[666]),i=4;i--;i&&d.push([X+p/2,Y-q/2,r/2]))p=r*S(b=i*2.094),q=r*C(b),x.lineTo(X+p,Y-q);x.stroke()

Jan 17 2020 3:48 AM UTC

}// 140/140

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Incremental #sierpinski

u/katkip

#fractal
u/Cloud

Wow! Nice fractal!

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pavel

function u(t) {

X=450
c.width|=f=(r,a,o)=>r>9?f(r/=2,a-o,-o)+f(r,a,o)+f(r,a+o,-o):(t-=.02)>0&&x.lineTo(X+=r*C(a*=355/339),Y+=r*S(a))
f(Y=1e3,0,1)
x.stroke()

Jan 17 2020 3:27 AM UTC

}// 140/140

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One stroke #sierpinski

u/tylertoomey

Wow, this is phenomenal!
u/katkip

#curve #sfcurve

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Xen

remix of d/16266 by u/metamero

function u(t) {

x.fillText(x.globalCompositeOperation='xor',!x.drawImage(c,T=!T*9,3),9)

Oct 23 2019 4:39 PM UTC

}// 71/140

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71 byte remix #gameoflife #sierpinski

u/metamero

i thought about this but i assumed it wasn't sierpinski

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metamero

remix of d/16265 by u/metamero

function u(t) {

x.globalCompositeOperation='xor'
x.fillRect(0,!x.drawImage(c,T=!T,1),T,T)

Oct 23 2019 3:16 PM UTC

}// 73/140

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73 byte remix #gameoflife #sierpinski

u/Xen

wow!!! love it
u/Qwitter

periodic too

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metamero

remix of d/16248 by u/Xen

function u(t) {

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

Oct 23 2019 3:16 PM UTC

}// 77/140

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77 byte remix #gameoflife #sierpinski

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