Top dweets by u/pavel

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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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 ?

Show more comments…
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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pavel

function u(t) {

for(i=36;--i;x.fillRect(m?Math.abs(9*t%53-26)<<6:i*60-210,m*i*327,60<<2*m,m?99:2e3))m=i<3,x.fillStyle=m?i%2?'#ff0':'#00a':i%2&t/4?R():'#eee'

Feb 9 2020 1:50 AM UTC

}// 140/140

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Stepping feet #illusion

u/katkip

#opticalillusion
u/veubeke

@pavel Sorry, I didn’t see your dweet. I deleted mine and will do a better job searching next time.
u/pavel

I was just cross-posting mine as they were on the same topic without a clear keyword. You should have kept yours, it was clearly different.

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pavel

function u(t) {

a=Math.abs;x.font='97px"';x[f='fillText']('dwitter.net##.dweet-wrapper:has(:contains(eval))',0,540);x[f]('😂',450*a(t%8-4),1080-990*a(C(t)))

Nov 15 2019 1:50 AM UTC

}// 139/140

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uBlock Origin custom filter to hide compressed dweets

u/pavel

As a bonus it hides itself because you no longer need it... heh
u/f8f82804

d/16645
u/joeytwiddle

To avoid (some) false-positives, you could get slightly stricter with e.g. :contains(eval):contains(unescape)
u/joeytwiddle

For beta.dwitter.net replace .dweet-wrapper with .card

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pavel

function u(t) {

for(c.width|=i=2;i--;)for(r=30;r--;i&&x.beginPath(x.stroke()))x.lineWidth=i?1:5,x.arc(960,540,18*r,i?0:a=t*r/4%(2*Math.PI),i?7:a);x.stroke()

Jun 12 2019 2:30 AM UTC

}// 140/140

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pavel

function u(t) {

x.rotate(!t*Math.PI/4);for(i=30;i--;)for(j=30;j--;x.fillRect(i*99+d-250,j*99-2e3+d,99,99))x.fillStyle=R(a=(i+j)%2*256,a,a),d=S(i*j/99+t)*250

Nov 7 2018 12:56 AM UTC

}// 140/140

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pavel

remix of d/10356 by u/pavel

function u(t) {

for(x.fillRect(0,0,X=w=c.width=600,w);X-=6;)for(r=X**2.3%w,Y=h=r*t&504;Y;x.fillText(r*Y&1,X,Y-=8))x.fillStyle=R(b=Y-h||w,250+Y-h,b)

Oct 15 2018 12:05 AM UTC

}// 131/140

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#matrix #rain v3 shorter, faster, and with variable speed droplets

u/joeytwiddle

Let the white burn briefly: b=250+(Y-h)*6

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pavel

remix of d/11101 by u/pavel

function u(t) {

t?c.width=540:a=b=0
q=42+t&-1
with(x)rect(X=q*q%533,Y=X*q%300,8,8),moveTo(a+=C(d=Math.atan2(Y-b,X-a)),b+=S(d)),fill(arc(a,b,15,d+t%1,d-t%1))

May 31 2019 4:27 AM UTC

}// 140/140

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#pacman is too slow

u/KilledByAPixel

Pᗣᗧ•MᗣN ᗧ • • •
u/joeytwiddle

wow
u/rep_movsd

Forever hungry
u/46uuuu

#chase

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pavel

remix of d/14305 by u/robbyg

function u(t) {

r=(t&&2+r)**.5;throw p=t?2*p/r:2

May 31 2019 3:19 AM UTC

}// 32/140

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Calculating #pi based on Viète's formula

u/pavel

Converges pretty quickly

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pavel

function u(t) {

for(i=108;i--;x.fill(new Path2D('M2131404151424325243323221303'.split``.join` `)))x.setTransform(s=41.8,0,0,s,i%16*4*s-2*s,(i>>4)*4*s-s)

May 27 2019 9:04 PM UTC

}// 136/140

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Decent!

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pavel

remix of d/13523 by u/Jezza

function u(t) {

with(x)for(X=960,Y=540,shadowBlur=i=9;--i;fillRect(X+=C(a=t*1e3/(-3)**i)*r,Y+=S(a)*r,i,i))shadowColor=fillStyle=`hsl(${60*i},50%,50%`,r=2**i

May 8 2019 6:34 AM UTC

}// 140/140

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#epicycles #graffiti

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