Hot 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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Current theme challenge: #ScaryMovies

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pavel

function u(t) {

f=(n,x,y)=>n<1&x*x+y*y<4?f(n+.01,x*x-y*y-X/1e4-1.65,2*Math.abs(x*y)+Y/1e4-.09):n
for(i=3e4;i--;x.fillRect(X=u&2047,Y=u>>11,1,f(0,0,0)))u=-~u

Jul 24 2022 4:34 PM UTC

}// 140/140

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Burning Ship

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u/pavel

#burningship #fractal
u/rodrigo.siqueira

Incredible!I've just seen a discussion about this Burning Ship Fractal on Hacker News: https://news.ycombinator.com/item?id=32210140
u/cantelope

looks more like a black cat caught in a spider's web to me
u/danny@hille.dk

f=(n,x,y)=>n<1&x*x+y*y<4?f(n+.01,x*x-y*y-X/1e4-1.7,2*Math.abs(x*y)+Y/1e4-.08):n for(i=3e4;i--;x.fillRect(X=u&2047,Y=u>>11,1,1,x.fillStyle=hsl(${(m=f(0,0,0))*60+200},99%,${m*200}%))u=-~u
u/rep_movsd

Amazing
u/rep_movsd

Amazing
u/rep_movsd

I have an NFT based on this where I manually hunted for interesting patt patterns at anywhere from 100x to 10 trillion X zoom. there are literally infinite variations
u/rep_movsd

Some locations in this https://imgur.com/gallery/XQR8tNw

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pavel

function u(t) {

for(c.width&=i=8320;i--;)x.fillRect(X=i&127,i>>7,1,Math.min(...[0,2,4].map(a=>1.4-S(a+=4*t)/6-(.4-Math.hypot(X/32-2+C(a),i/4e3-1))**.3||1)))

Jul 22 2022 11:07 PM UTC

}// 140/140

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The Three-Body Problem

u/pavel

#raytracing

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pavel

function u(t) {

for(c.width&=i=4992;i--;x.beginPath(x.stroke()))[a=C(i%64)*t,b=C(i>>6)*t].map(o=>x.arc(448,252,252,o,o)),x.globalAlpha=1/77**(1-C(a-b))**.5

Jun 26 2022 8:58 PM UTC

}// 139/140

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Ripple

u/BriSeven

#circleChallenge #circle
u/magna

Love it!
u/DaSpider

Dethroned from the h/circlechallenge/top by u/pavel

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pavel

function u(t) {

for(i=c.width|=0;y=--i>>7;)x[i&7?'arc':'moveTo'](43*(i/2&60|y&2),25*(3*y+y%2-2),99-i%2*(51+45/(1+i**C(t+y/9))),a=(i+y+.5)%6/.955,a)
x.fill()

May 11 2022 12:56 AM UTC

}// 140/140

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Unblasphemous Geometryᵀᴹ Radical Echoes Pattern by Xponentialdesign

u/pavel

Source: https://www.reddit.com/user/xponentialdesign…
u/Xen

Love it!
u/vain

i'm really amazed how you converted the gif anim to an amazing tiny code. just great! <3
u/pavel

Thanks for the kind words :)

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pavel

function u(t) {

for(i=c.width|=0,x.setTransform(99,0,0,99,960,540);i--;x.fillRect(X-.5,i%32-16.03+X/2-X/(1+1e4**S(t)**7),1,.06))X=(i%512||x.rotate(1.57))>>5

Apr 24 2022 3:57 PM UTC

}// 140/140

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#beesandbombs

u/pavel

Source: https://twitter.com/beesandbombs/status/1361…

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pavel

function u(t) {

for(x.fillRect(x.globalAlpha=.04,0,i=4e3,i);r=--i>>9;x.clearRect(420+f(C),f(S),6,6))f=g=>540*(1+g(a=2.0944*i/2**r)+.7**r*(.3*g(a+3*t)-g(a)))

Apr 22 2022 4:47 PM UTC

}// 140/140

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#beesandbombs

u/pavel

From https://twitter.com/beesandbombs/status/1364…
u/donbright

neat

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pavel

function u(t) {

for(i=c.width|=0;i--;x[i&1?'moveTo':'arc'](960+8*r*C(a=i*.0997),540+8*r*S(a),r+r/(1.2+999**S(i/180+a-2*t)),0,7))r=1.0028**i
x.fill`evenodd`

Apr 8 2022 11:33 PM UTC

}// 139/140

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Kaleidoscopic Spiral

u/pavel

Remix of https://twitter.com/beesandbombs/status/1386…
u/pavel

#beesandbombs
u/pavel

I like this trick of re-using the same args for moveTo and arc back to back. The first two args are x and y for both and moveTo ignores extra args.
u/magna

YES!
u/vain

very cool and beautiful fx.

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pavel

function u(t) {

f=(x,y,n=0)=>x<2?f(x*x-y*y,2*T(2*x*y)-.5,n+1):C(n/4)/2-.5
for(i=5e4;i--;x.fillRect(X=u&2047,u>>11,f(X/960-1,u/2e6-.56),1))u=-~u

Apr 7 2022 11:41 PM UTC

}// 127/140

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https://twitter.com/ntsutae/status/151218131…

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u/pavel

Cool function from u/ntsutae, but mostly tinkering with the rendering logic so its quick and short. Takes about a second.
u/pavel

Renders f on -1<=x<=1 and -9/16<=y<=9/16
u/pavel

Expects 0<=f(x,y)<=1 in that range
u/pavel

...or alternatively -1<=f(x,y)<=0 in that range too as my code is doing...
u/pavel

i can be initialized to whatever you want, it is a pure speed vs lag tradeoff
u/taupelink

wow!
u/ntsutae

👍👍
u/danny@hille.dk

NICE! - Interestingly this code f=(X,Y,n=98)=>Y*Y>n?n:f(4*X*Y-.5,Y*Y-X*X,n+1.2) from d/19821 produces an image with many similarities with this.
u/danny@hille.dk

DANG this is speedy! - you can crank out some fractals in no time :-) f=(X,Y,n=1)=>X*X>n?n:f(4*X*Y-.5,Y*Y-X*X,n+1.2) for(i=5e4;t<1&&i--;x.fillRect(X=u&2047,u>>11,19/f(X/960-1,u/2e6-.56),1))u=-~u

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pavel

function u(t) {

for(i=c.width|=h=1.5708;y=i--%3-1||S(i);x.fillRect(960+16*S(a+=i*h+t/3)/p,540-9*C(a)/p+13*r*y,4,4))r=9+9/(1+i**S(i*i+t)),p=S(a=i%3*i%h+.8)/r

Mar 30 2022 10:47 PM UTC

}// 140/140

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Hypercube #beesandbombs

u/vain

very cool. like the morphing / moving dots / lines #cube #3d
u/tomxor

Very neat. The migration of the points gives it quite an etherial look.
u/aleamb

amazing!

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pavel

remix of d/24665 by u/stephanegeorget

function u(t) {

for(i=c.width|=h=Math.PI/2;m=--i**C(t);x.fillRect(960+s*r*C(a),540+s*C(i*i),s/=36,s))r=C(i**9)*(m/S(i%h-84)+S(i*i))/++m,s=800/(3+r*S(a=i+t))

Dec 31 2021 2:26 AM UTC

}// 140/140

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Cube and sphere appear

u/stephanegeorget

Amazing 🤩
u/vain

Very cool!
u/neimad

mastery of dwitter right here
u/Joachim

#d3 #cube #sphere
u/f8f82804

#perspective

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