Random dweets | Dwitter

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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rodrigo.siqueira

remix of d/10269 by u/katkip

function u(t) {

c.width|=0
x.translate(960,540)
x.rotate(t/100);
for(i=200;i-->0;)x.lineTo(2200,0),x.rotate(3.00007)
x.fill("evenodd")

Nov 18 2018 4:35 PM UTC

}// 118/140

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Singularity in a Geometric Space

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Qwitter

remix of d/21485 by u/Qwitter

function u(t) {

w=c.width=1920;N=128;for(j=9216;j--;)(X=(j%N)*w/N,Y=((j/N)^0)*w/N,x.fillRect(X,Y,9*S(Math.hypot(X-960,Y-540)/33-9*t)+5*C(X/66+9*t),9))

Jan 28 2021 5:11 PM UTC

}// 134/140

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Interference Rose

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metamero

function u(t) {

eval(unescape(escape`𡠽𩀽🡻𭱩𭁨𚁸𚑦𫱲𚁩🐶𝀻𪐭𛐻𩡩𫁬𚁐👮𩑷𘁐𨑴𪀲𡀬𩀿𤀮𨑲𨰨𞐶𜀫𚀨𪐾🠳𚐭𜰮𝐩𚡤𛀵𝀰𚰨𪐥𞀭𜰮𝐩𚡤𛀴𜠬𜀬𝰩𞡐𛡲𩑣𭀨𜀬𜀬𜡥𜰬𜡥𜰩𚐩𩡩𫁬𤱴𮑬𩐽𩀿𩀦𜐿𤠨𜀬𜀬𜀬𛠳𚐺𤠨𜐹𞐬𜐹𝰬𞀸𚐺𤠨𞐱𛀸𞀬𜠵𝐩𯐻𡠨𜀩𞱆𚀱𜠰𚐻𡠨𜐱𝐩`.replace(/u../g,'')))

May 20 2019 7:08 PM UTC

}// 138/140

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attempt to reproduce another #opticalillusion by prof. Akiyoshi Kitaoka (image appears to contract)

u/metamero

uncompressed: F=d=>{with(x)for(i=64;i--;fill(P=new Path2D,d?P.arc(960+((i>>3)-3.5)*d,540+(i%8-3.5)*d,42,0,7):P.rect(0,0,2e3,2e3)))fillStyle=d?d&1?R(0,0,0,.3):R(199,197,88):R(91,88,255)};F(0);F(120);F(115)
u/pavel

147 with(x)for(d of[0,120,115])for(i=64;i--;fill(arc(960+((i>>3)-3.5)*d,540+(i%8-3.5)*d,d?42:2e3,0,7)))beginPath(fillStyle=d?d&1?'#0005':'#CC5':'#55F')
u/Xen

niice

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katkip

remix of d/11978 by u/katkip

function u(t) {

c.width*=1;for(i=900;i--;)k=S(t+i)*t-i,l=500-C(i+C(i*t/9999)/9)*500,x.fillRect(960+C(k)*l,540+S(k)*l,10,10)

Jan 28 2019 12:53 PM UTC

}// 107/140

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Weird hypocycloids

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sawbona

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

Feb 21 2022 10:56 PM UTC

}// 112/140

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test001

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yokljo

remix of d/8774 by u/Feiro

function u(t) {

with(x)for(k=2e3;k--;beginPath(fillStyle="#0001"))arc(960,540,k/4,v=k%4*1.57+S(t*3-k/280)+t,v+.2),strokeStyle=R((S(t)+2)*50),stroke()

Jun 28 2018 12:55 PM UTC

}// 133/140

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u/firegodjr

Excellent gradients!

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rodrigo.siqueira

remix of d/20499 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(`
!t&&x.translate(960,540)
if(t<1.5)x.lineWidth=2/t,x.rotate(t/9),d=360*(1-S(t))
x.strokeRect(-d,-d,2*d,2*d)

Nov 8 2020 8:47 PM UTC

}// 130/140

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Framed flower #spiral

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magna

function u(t) {

t||(w=c.width=192)
for(h=54,i=w;i--;x.fillRect(i,R,1,j/w))for(R=t*39|0,X=i/h-2.4,Y=R/h-1,a=b=0,j=w;a*a+b*b<5&&j--;)[a,b]=[a*a-b*b+X,2*a*b+Y]

Oct 22 2021 3:06 AM UTC

}// 140/140

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#mandelbrot #glitch

u/magna

My first attempt to draw a Mandelbrot fractal, straight from the reference implementation from Wikipedia. Still need to learn lots of size/speed hacks, apparently :)
u/KilledByAPixel

congrats!
u/Toby

nice!

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andrea270872

function u(t) {

F=[x=>x,x=>1-x*x,x=>x*(1-x),x=>(1-x)**2]
for(a=1e3,i=0;i++<a;x.fillStyle=`hsl(${S(t)*60%60},90%,50%,.1`)x.fillRect(i,F[~~t%4](i/a)*a,99,1)

Nov 25 2019 5:55 PM UTC

}// 139/140

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colored easing functions

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Niklas

function u(t) {

cX=960,cY=540,rX=cX/1.5,rY=cY/2,q=512,c.width|=0;for(var i=0;i<=q;i++)a=i*(2*Math.PI/q)+t,x.fillRect(C(a)*rX+cX-2,S(a+i/5.4)*rY+cY-2,4,4);

Feb 23 2017 11:27 AM UTC

}// 138/140

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