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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: #Food

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KilledByAPixel

remix of d/22803 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󩭯󬬨󭼽󜭥󜼬󪼽󮬽󞜹󞽫󟍷󞽸󛭦󪝬󫍒󩝣󭌨󪬿󪜪󜬰󞬰󛍪󟽪󟬲󟼴󜌰󚽪󚬴󝬭󤼨󪜯󪬪󝜫󭌪󪬩󚭪󞭺󚽩󚬪󝜥󜬹󞜫󪜪󨬺󪜪󞜬󪬿󜬰󞭷󛍡󟽷󞬹󚜩󪜽󪼥󮬬󪬽󪼫󚼾󟬷󛍡󟝪󛜲󛍢󟝪󘜽󜜬󩬽󪭼󯍩󛍸󛭦󪝬󫍓󭍹󫍥󟝒󚍱󟝡󟽦󚬹󚽢󚭓󚍦󚭦󚽴󚜪󜼹󞭷󛍪󚭪󚽱󛝺󛍪󟽪󚬲󝜺󮬩`.replace(/u../g,'')))

May 18 2021 5:09 AM UTC

}// 140/140

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Ocean City Sunset 🌆🌊

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u/KilledByAPixel

#city #landscape
u/magna

Fantastic!
u/andrea270872

it really has a retro-game quality! cool
u/aleamb

wow!
u/magna

This is masterclass.
u/cheft

awesome
u/KilledByAPixel

how i made it https://youtu.be/vnx8kI4EcVc

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Blacklink

function u(t) {

eval(unescape(escape`𪀽𝐴𜀊𨰮𭱩𩁴𪁼👷🐹𝠰𒡯👴𙐴𒡰🐵𜀭𫰥𜐪𚁯🠳𚐪𜰳𒡸𛡲𫱴𨑴𩐨𮠽𫰼𜐿𘐨𩀽𜐰𜀪𫰩𞡯🀲🱯𙐱𚠱𛠶𞠨𩀽𫰼𜰿𜐰𜀭𫰥𜐪𝐰𞡰𛐱𛀱𛠵𝰩𚐊𩡯𬠨𪐽𞐻𪐭𛐻𚑸𛡦𪑬𫁒𩑣𭀨𪀪𤰨𮠩𚱷𚡃𚀭𮠩𛑰𛰲𚱤𚠨𪐭𝀩𛁨𚡃𚁺𚐫𭰪𤰨𛑺𚐭𜐮𝐪𬀬𬀬𜰪𬀩`.replace(/u../g,'')))

May 16 2021 2:20 PM UTC

}// 139/140

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Fun looping animation. Huge thanks to the dwitter discord for helping me golf it down more than 60 characters!

u/Odog8

#default
u/katkip

#loop

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tomxor

remix of d/22746 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀦👩🐴𝠰𞀻𪐭𛐻嬈𙠳🱸𛡬𪑮𩑔𫰨𦀫👲𚡃𚁡👩𙠱🱃𚁮👩𚠴𚱴𚠸𚐭𚀴𯁩𛰸𙠱𚐺𪐦𜡼𯁃𚁮𛐱𚐫𚀱𯁩𛰴𙠲𚐩𛁙𚰽𬠪𤰨𨐩𚐺𮀮𫑯𭡥𥁯𚁘🐹𞐪𭀫𪰥𜰲𚡴𚱫𙐹𝰪𪰦𝐱𜐬𦐽𦀯𝀫𪰯𜠩𚑫👩🠾𝀬𬠽𜰫𚁩𙠲🱩𛰲𙠴𞡩𛰸𙠱𚐻𮀮𬱴𬡯𪱥𚀩`.replace(/u../g,'')))

May 15 2021 12:26 AM UTC

}// 139/140

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🏃‍♀️🏃🏃🏿‍♂️🏃🏻‍♀️🏃🏽‍♂️🏁 Marathon 🏁🏃‍♀️🏃🏃🏿‍♂️🏃🏻‍♀️🏃🏽‍♂️

u/tomxor

This was a fun golf/optimise. Shout out to u/KilledByAPixel for the awesome and original idea! I predict many remixes to come
u/KilledByAPixel

Wow, amazing! 🏆
u/Toby

Incedible!

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rodrigo.siqueira

function u(t) {

for(i=22;i--;)
Y=(3**(-C(2*t+i/9+S(t/2+i/3))-.3))**3*18,
x.fillRect(i*15+200*t,i*40+200-Y,6,6*(t<8))

May 12 2021 1:19 AM UTC

}// 100/140

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Math Surface

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Xen

remix of d/22312 by u/ciaccodavide

function u(t) {

x.drawImage(c,z=-99,z,2118,1278)
x.drawImage(stats.dom.firstChild,680+C(t)*z,440-S(t)*z,500,300)

Mar 31 2021 2:16 PM UTC

}// 96/140

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quick play

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BackendForth

function u(t) {

c.onmousemove=(e)=>{c.width=1920
for(i=1920;i-=64;)for(j=1080;j-=54;)p=e.x*3.5-i,q=e.y*3.5-j,r=(p*p+q*q)**.5/99,x.fillRect(i-p/r,j-q/r,9,9)}

Mar 10 2021 2:37 AM UTC

}// 140/140

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Mouseover, please!

u/erin

this is gonna b one of my fav dweets i think
u/smtsjhr

good fun!
u/danny@hille.dk

Nice!
u/Xen

nicely!
u/aleamb

#interactive

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tomxor

remix of d/21783 by u/tomxor

function u(t) {

A=t?A.map(a=>(s=u[a>>4]^=1,x[s?'fillRect':'clearRect'](a>>6,a&1008,16,16),a=a+2*s+1&~4,a+=a&1?a%4-2<<10:a%4-1<<4)):[54675,69010,69233,54896]

Mar 2 2021 11:27 PM UTC

}// 140/140

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Multi #langton's #ant

u/tomxor

Squashed each ant into a 16bit bit field, [X,Y,D] = 0b 111111 111111 0111. These ants were generated with: X=7,Y=7,D=0,[[-X,-Y,3+D],[+Y,-X,2+D],[+X,+Y,1+D],[-Y,+X,0+D]].map(([X,Y,D])=>X+60<<10|Y+32<<4|D%4<<0)
u/mark1626

This is incredible. Just one question, how does s = u[a >> 4] ^= 1 work?
u/tomxor

Thanks :) a>>4 is the cell index of a 64x64 grid. the lower 4 bits are for the ant's direction so shifting them off to the right leaves only the 12 X and Y bits (see above). u is just an object, so all of these indicies will be undefined initially, but undefined is falsey and bitwise operators coerce falsey into 0, i.e undefined ^ 1 == 0 ^ 1 == 1, in otherwords XOR just treats all of the initial cell values as 0. Using the assignment version ^= means we toggle each cell between 0 and 1 each time an ant passes through it (which is part of the langton ant rules).

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tomxor

remix of d/21554 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀦👩🐸𜰲𜀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚀶𝀫𦀯𜠫𦐯𜐲𞀪𤰨𥀫𦐯𜠴𚱴𚠴𚱓𚁔𛰳𚐩𛀸𚱙𛰲𚱙𛰲𝐶𚡃𚁔👘𛰳𛑴𚠹𚐬𥠼𜐱𜡼𥠼𜐲𞀦𦀯𝀦𜐬𦀯𜠲𯁖𛰴𞐭𜐿𛠳𞡘𛰱𞁼𦐯𜐲𛐴𯁘𛰶𚰴𛠵𙠱🰮𜐺𛠵𚐩𦀽𪐥𝠴𛐳𜠬𦐽𪐯𝠴𛁖👙𚰨𦀪𦀩𚠪𛠵𛰲`.replace(/u../g,'')))

Feb 2 2021 11:24 PM UTC

}// 137/140

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Moar! #default #flag #banner

u/KilledByAPixel

Wow!
u/Irratix

:o
u/Odog8

damn, this is phenomenal!!

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Pascal

function u(t) {

M=(a,r=0,i=0,n=40)=>Math.abs(r+i)<n&&1<n?M(a,r*r-i*i+a,2*r*i-t/600+.0149,--n):1-n/30;for(i=1920;i--;)x.fillRect(i,t*120,M(i/64e3-1.6)**.5,2)

Jan 23 2021 7:42 PM UTC

}// 140/140

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#mandelbrot forest

u/magna

Lovely!
u/smtsjhr

nice one!
u/Xen

nice
u/Qwitter

That's Awesome! Escape Time in the MandelBrot Forest for rest.

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rodrigo.siqueira

remix of d/21197 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=g=>i*C(i+S(t)**4)*g(i/70)*T(i/999);i--;x.fillRect(960+f(S),540+f(C),9/t,9/t))x.fillStyle=`hsl(${i/t/80},99%,${S(i-t)*99}%,.1`

Jan 8 2021 1:10 PM UTC

}// 137/140

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Cubist Spiral #spiral

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u/ciaccodavide

Bueautiful! *^*
u/danny@hille.dk

Incredible, love it!
u/Xen

nicely done!
u/DataMeta

this is so rad
u/taupelink

trippy
u/joeytwiddle

That is rich