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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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jdspugh

function u(t) {

x.fillRect(0,0,e=1920,e)
for(i=e;i--;x.clearRect(e/2+S(t+i)*i,540+C(t+i)*i,6,6))
x.fillStyle='#0001'

Feb 1 2022 5:08 PM UTC

}// 100/140

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Spiral

u/rep_movsd

Ah my head 😵‍💫

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Tekmap

function u(t) {

for(c.width|=j=15,x.translate(960,540);j--;x.rotate(t/9+j))for(i=20;i--;x.fillRect(i*9-80,90*T(t*(j%5+3)-i/8)-a/2+99+10*j,4,a))a=1*T(i/5)

Jan 23 2022 11:56 PM UTC

}// 137/140

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Angry Mosquitoes

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taupelink

remix of d/24821 by u/taupelink

function u(t) {

eval(unescape(escape`景爨洽琿〺㍥㐻洭ⴻ砮獴牯步⠩⥘㵭⨪㌯㈵㜥ㄬ夽洪洯㤹㜥㐬瘽⸳⭭⨪㔯ㅥ㔥夬砮獴牯步却祬攽刨椽津㌴㤬椯㵶Ⱪ⽶ⱶ⨪ㄮ㔯㐩ⱸ⹬楮敗楤瑨㵩⼹⩶ⱸ⹢敧楮偡瑨⠩ⱸ⹡牣⠲攳⩘ⰲ㜰⩙Ⱪ⽶ⱭⱭ⭶⼲⤠`.replace(/u([^D].)/g,'$1%')))

Jan 23 2022 9:54 PM UTC

}// 139/140

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d/24824

u/taupelink

This started as just experimentation for tomorrow's prompt (pseudorandom number generator--I'm modding powers by primes, instead of my usual sines) but turned into kind of a fire-like effect.
u/taupelink

cx: i'm *dividing* powers by primes, then modding by 1.

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rep_movsd

function u(t) {

t||(X=Y=.1)
G=_=>-.38*X+1.38*X*X*Math.exp((1-X*X)/4)
for(I=D=1e3;I--;x.fillRect(D+X*70,540+Y*50,.2,.2))Z=X,X=Y+.01*Y*(1-.1*Y*Y)+G(),Y=G()-Z

Jan 20 2022 8:46 AM UTC

}// 139/140

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Gumowski-Mira attractor

u/rep_movsd

#fractal #attractor #chaos #waitforit

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taupelink

remix of d/24370 by u/taupelink

function u(t) {

eval(unescape(escape`景爨洽㈵〻洭ⴻ砮晩汬呥硴⠢浯癥≛津㑝ⰱ攳⨫⭘ⰵ㐰⨫⭙⤩堽䌨洭琯洩ⱙ㵓⡭⩭ⵘ⤬砮晩汬却祬攽刨渽㌵〭洬渫洪䌨㈪洩⼳Ɱ⭭⩃⠲⩭⩭⤯㌬⸰㌫㈪⩴⼹㤩ⱸ⹦潮琽怤筭⨲⼳⨪瑽灸⁡物慬怠`.replace(/u([^D].)/g,'$1%')))

Jan 19 2022 6:02 AM UTC

}// 135/140

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d/24794

u/taupelink

#genuary #genuary2022 prompt: "Use text/typography." This dweet is made by blurring+animating the letters of the word "move"
u/Xen

smoooth

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KilledByAPixel

remix of d/24776 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󭌥󜜼󛬰󜝼󯌡󨬿󩌽󣝡󭍨󛭲󨝮󩍯󫜨󭼽󜜲󜌩󚬶󝜵󜼶󞭃󟝃󟜾󘜡󭝛󪜫󠽝󒭦󫽲󚍢󟜰󛍩󟜴󩜴󞽩󛜭󞽸󛭦󪝬󫍒󩝣󭌨󪜥󭼪󥌬󚍩󛽷󯌰󚜪󥌬󥌬󥌽󜜶󚜩󨬫󟝡󟝵󦽩󧜽󩌦󜬪󚬨󞌪󠼨󛝷󚜫󝌪󠼨󭼩󚼲󚭃󚌭󜜩󚽃󚌱󚜩󛍸󛭦󪝬󫍓󭍹󫍥󟝠󪍳󫌨󙍻󩌫󨜪󭽽󛌹󞜥󛌤󮽡󚬹󯜥󛌮󞌩󨌻`.replace(/u../g,'')))

Jan 17 2022 6:44 PM UTC

}// 140/140

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2D Automata Demo (FLASH WARNING)

u/KilledByAPixel

rules change every second or if screen goes black
u/Joachim

awesome.

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Nemecsek

function u(t) {

c.width|=1
for(i=1e3;i--;x.fillRect(960+400*C(t/5)*S(t/i**C(t)),560+400*C(t)*C(t+i),d=9,d),i) x.fillStyle=R(q=255*S(t), i,-q )

Jan 13 2022 11:44 PM UTC

}// 126/140

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New_Core

function u(t) {

f=(q,l)=>(i*i*i+i*i*S(i*q-t/9))%l-99
for(c.width|=i=0;i<99;i++)x.font=i+"px'",x.fillText(String.fromCodePoint(128493+i),f(2,2e3),f(1,1300))

Jan 13 2022 11:00 PM UTC

}// 139/140

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Chaos

u/New_Core

to organize them, change i*q to just q in the first line =)

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ciaccodavide

function u(t) {

eval(unescape(escape`𭀿𚁘🐨𤠽𣑡𭁨𛡲𨑮𩁯𫐩𚀩𚠲𩐳𛁙👒𚀩𚠱𩐳𛁲👍𨑴𪀮𫑩𫠨𛠮𛡁𛡭𨑰𚁢🐾𣑡𭁨𛡡𨡳𚁍𨑴𪀮𪁹𬁯𭀨𦀭𨠮𦀬𦐭𨠮𦐩𛑢𛡲𚐩𚐬𠐮𬁵𬱨𚁻𦀬𦐬𬡽𚐩𞡁👛𮱘𞡘🐹𛁙𞡙🐹𛁲𞡲🐹𯑝𒡸𛡳𭁲𫱫𩐨𤀽𫡥𭰠𤁡𭁨𜡄𛁐𛡡𬡣𚁘𛁙𛁲𛀰𛀷𚐩`.replace(/u../g,'')))

Jan 12 2022 9:25 PM UTC

}// 133/140

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tangent #circles

Show more comments…
u/ciaccodavide

thanks Taran
u/rep_movsd

Wow - whats the algorithm used?
u/ciaccodavide

I don't know if this algorithm has a name but it's really simple: 1 create a circle, 2 choose a random position, 3 find the nearest circle's center, 4 draw a new circle with that random position and radius equal to it's distance to the nearest circle's center minus its radius
u/ciaccodavide

then go back to 2
u/ciaccodavide

d/24748
u/mottalan93

wow bro, i think u are the best doing these.

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veubeke

function u(t) {

A=t?A.flatMap((a,i)=>i>99?[]:Math.random(x.fillRect(a.x+=C($=a.t),a.y+=S($),1,1))<.01?[{...a,t:$+1},a]:a):[{x:50,y:99,t}]

Jan 11 2022 5:59 PM UTC

}// 121/140

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flatMap test

u/veubeke

Finally a decent built-in to create/read/update/delete objects in one iteration
u/ciaccodavide

super useful!