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.

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pavel

function u(t) {

for(c.width|=f=(k,n=9)=>n&&C(n**.9*k)/n+f(k,n-1),x.translate(h=960,i=0);i++<h;x.fillRect(r=h/z,r,-2*r,9/z/z))z=i/42,x.rotate(f(z+3*t)/180)

Apr 24 2020 2:49 AM UTC

}// 138/140

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https://twitter.com/ntsutae/status/121468374…

u/Xen

sexy lines
u/pavel

It seems like Safari plays dweets significantly slower until you tap on them... Giving the iframe focus increases the request animation frame rate.
u/katkip

very sexy

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pavel

function u(t) {

for(c.width=i=960;--i;x.ellipse(480,270-56*(j%2-.5)*y,r=32*(64-y*y)**.5,r/2,0,a=(j+t%1)/7,a+!j*7))j=i>>4,y=i%16-8;x.stroke()

Apr 10 2019 8:35 AM UTC

}// 124/140

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#wireframe #sphere

u/f8f82804

#d3
u/Xen

Nice!
u/lionleaf

Nice one! #globe
u/pavel

I use 44 longitude lines so the arc angle between adjacent two is 2*pi/44 which is approximated by 1/7 to 4 decimal places.
u/pavel

Using the famous pi ~ 22/7 approximation.

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pavel

function u(t) {

f=(X,Y,r,a,s,d=1)=>r>.2&&x.lineTo(X,Y)|f(X+C(a-=s/55)*r,Y+S(a)*r,r-r/15,a,s,-d)|f(X,Y,r/3,a+s*d,s*d)
t||f(-60,600,140,0,1)|x.stroke()

Feb 14 2019 10:05 PM UTC

}// 133/140

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Barnsley-like #fern #fractal

u/rep_movsd

#underrated

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pavel

remix of d/11472 by u/cantelope

function u(t) {

for(k=c.width|=0;j=--k>>7;x.lineTo(960*(z+4*S(t)+.43*d*((k&120)-62)+S(a))/z,1e3/z))d=.5-(j+4*t&1),z=j+.6-4*t%1+C(a=k%8*d*2.1)*2/3;x.stroke()

Dec 18 2018 11:22 PM UTC

}// 140/140

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k=[4 bits for y][4 bits for x][3 bits for hexagon vertex]

Show more comments…
u/pavel

16*16*8=2048~=1920 so using width
u/pavel

.43~=3**.5/4, 2.1~=2*Math.PI/3
u/pavel

120=0b1111000 so k&120=x*8
u/pavel

I'm using a single stroke and no moveTo. This is a single curve, just lined everything up.
u/pavel

d is horizontal offset, even rows are offset from odd rows. Using +4*t&1 to explicitly cycle the animation every second instead of implicitly cycling every 2 seconds. Longer cycle leads to z<0 and glitches or hexagons that don't reach the camera.
u/magna

Wow!
u/aleamb

awesome!!!
u/pavel

#uncompressed with one plane

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pavel

remix of d/9174 by u/f8f82804

function u(t) {

with(x)for(N=i=300;A=S(a=i--/99);beginPath(fillStyle=`hsl(${i*N} 90% ${c**4}%`))c=A*S(b=t+i)+2,fill(arc(N*c,N*(A*C(b)/2-C(a)+2),70*A+9,0,7))

Nov 8 2018 11:00 PM UTC

}// 140/140

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u/katkip

I like the fact that it is so fast
u/iverjo

Nice! This reminds me of the spinning beachball of death (on Mac OS X)
u/aleamb

#colors #d3 #sphere
u/pavel

#uncompressed

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pavel

function u(t) {

for(c.width=640,s=145;s-=5;)for(t+=.05,Q=t%4,i=17;i--;)x.lineTo(320+s*S(A=(2*Q*(Q<1)+i-(i>>2))*1.571),180+5/8*s*(C(A)+1-(i&4)/2));x.stroke()

Nov 8 2018 4:55 AM UTC

}// 140/140

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u/DataMeta

Very cool

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pavel

function u(t) {

for(x.fillRect(p=710/113,0,i=c.width|=f=g=>360*g(i/8%1*p)+(134+9*C(a=p*i/96))*g(a/20+(i&1?t:-t)),i);i--;)x.clearRect(960+f(C),540+f(S),7,7)

Jul 1 2021 7:13 PM UTC

}// 139/140

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From https://patakk.tumblr.com/post/108750134710

u/tomxor

Satisfying :)

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pavel

remix of d/23084 by u/New_Core

function u(t) {

for(c.width=960,A=[9*S(t),i=0,15+C(t)];i++<60*t;A[3-3*S(i**9)>>1]+=S(i*i)>0||-1)s=250/A[2],s>0&&x.lineTo(480+A[0]*s,270+A[1]*s);x.stroke()

Jun 10 2021 9:52 PM UTC

}// 138/140

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u/miratcan

HOW!!!!????
u/pavel

S(i*i)>0||-1 is shorter as 1|S(i*i)-1
u/pavel

I tried thinking of a way to make it never double-back but its hard to fit. Special sequence that looks random and has this property?
u/donbright

!!!!

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pavel

remix of d/20901 by u/pavel

function u(t) {

for(i=c.width|=p=g=>(g(0)?k&3:k/4)*200+130*g(.8+(~~k+k/4&1||-1)*(i%120*41/13+5*t));k=--i/120;)x.fillRect(560+p(S),240+p(C),9,9)

Dec 4 2020 9:12 PM UTC

}// 127/140

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Moving #illusion

u/pavel

Discovered this randomly when golfing the original. Not sure why it happens.
u/danny@hille.dk

cool effect: the "feature" is caused by not truncating k=--i/120 -> k=--i/120|0 disables this feature :-)
u/KilledByAPixel

👍
u/danny@hille.dk

better solution: for(i=c.width|=p=g=>(g(0)?k&3:~~k/4)*200+150*g((k&1||-1)*(i%120*41/13+5*t));k=--i/120;)x.fillRect(560+p(S),240+p(C),9,9)

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pavel

remix of d/18610 by u/KilledByAPixel

function u(t) {

with(x)for(k=i=999;--i;beginPath(fill(arc(k+i+r*C(a=i%2?i+240*t:(i-k*t>>5)**5),540+r*S(a),r/5,0,7))))fillStyle=R(i/4),r=(S(t)/2+1+i%2)*7e4/i

May 7 2020 5:55 PM UTC

}// 140/140

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#blood #cavern 🩸 #uncompressed

u/KilledByAPixel

amazing!
u/KilledByAPixel

interesting how we made different concessions to make it fit!
u/katkip

now Hemoglobin is *l o n g e r* wow.
u/nml

looks like a red blood vessel

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