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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Current theme challenge: #Food

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donbright

remix of d/1871 by u/walsh9

function u(t) {

圈=(n,d,N,D)=>{d+D<15?(圈(n,d,n+N,d+D),圈(n+N,d+D,N,D),w=2e3,m=d+D,x.beginPath(),r=w/m/m/2,x.arc(w*(n+N)/m,r,r,0,7),x.fill()):1}
圈(0,1,1,1)

Mar 7 2017 11:35 PM UTC

}// 136/140

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basic Ford's Circles (sort of like Apollonian Circle Packing but every circle touches the floor, or here, the ceiling)

u/donbright

#math
u/donbright

see also https://www.dwitter.net/d/15086 by @taupelink
u/donbright

#numbertheory
u/taupelink

nice!

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temp2132324

function u(t) {

x.fillStyle=R((S(t)+3.14/2)/3.14*290,(S(t+3.14)+3.14/2)/3.14*300,(C(t)+3.14/2)/3.14*255);x.fillRect(0,C(t/2)/3.14*1710+540,1920,10)

May 3 2020 1:38 AM UTC

}// 131/140

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Rainbows

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ellisk1

function u(t) {

for(k=c.width|=n=960;k--;x.fillRect(n+(y/3+40)*C(a),y,7,99))j=k%n,a=j/62+((j/192|0)+(k>n))*3.2,x.fillStyle=R(b=S(a)*255,-b/2),y=(a+t*5)*30%n

Dec 25 2018 11:41 AM UTC

}// 140/140

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Ribbon Christmas Tree

u/rodrigo.siqueira

#christmas #tree

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anzx

function u(t) {

c.width=1920;x.fillStyle=R(255*C(t),255*S(t),255,1);for(i=1;i<10;i++)x.fillRect(900+S(t*i)*300,540+C(t*i)*300, 120, 120);

Jan 4 2018 8:01 PM UTC

}// 121/140

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jviide

function u(t) {

for(x.translate((c.width|=0)/2,i=540);i--;x.fillRect(-i,-i,2*i,2*i))x.rotate(C(33*i-t)),x.fillStyle=R(i,0,99,.2-i/2e3)

Nov 29 2022 3:10 AM UTC

}// 118/140

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bloom loop

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rodrigo.siqueira

remix of d/4665 by u/ben

function u(t) {

v=(a,b,Φ,r)=>{for(i=~r;i++;x.fillStyle=R(0,Φ*30))x.fillRect(a+=S(Φ),b-=C(Φ),r/30,1)
while(r>3)v(a,b,Φ+S(b)/4+.4,r*=.72)}
v(t*2e4,1450,t,490)

Jun 5 2019 3:02 PM UTC

}// 140/140

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Windy garden #fractal #tree

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KilledByAPixel

remix of d/36155 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󩜽󜬮󝬲󚬪󚍴󙜳󛼳󚜊󪼽󝌴󛬷󚬨󩜭󜜯󩜩󒭡󟜱󜜷󛽥󛜱󝼪󩜫󪼊󩭯󬬨󨼮󭽩󩍴󪍼󟝩󟜲󜌻󪜭󛜾󛜲󜌻󮌮󩭯󫭴󟜧󝍥󫜢󙼩󩭯󬬨󪬽󛜲󜌻󪬫󚼼󜬰󞽸󛭦󪝬󫍔󩝸󭌨󤽴󬭩󫭧󛭦󬭯󫝃󫽤󩝐󫽩󫭴󚌱󜬸󝜶󞌫󬜪󬜥󞝼󜌩󛌹󜬸󚽩󚬨󪼫󨜩󚽪󚭫󛌵󝬵󚽩󚭫󚽪󚭡󚜩󬜽󪜪󪜭󪜪󪬭󪬪󪬻`.replace(/u../g,'')))

Aug 23 2026 5:50 PM UTC

}// 140/140

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Hyperbolic Cat Rotation 😹

u/KilledByAPixel

inspired by Etienne Jacob https://x.com/etiennejcb/status/160494633141…
u/KilledByAPixel

and Arnold's cat map https://en.wikipedia.org/wiki/Arnold%27s_cat…
u/cantelope

great hyperbolic space implementation! ngl, this has eluded me thus far :)
u/tomxor

I stared at it too long.. now everything is doing hyperbolic rotation 😿

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rodrigo.siqueira

remix of d/33049 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛀲𩐳𛀲𩐳𚠡𭀩𞱦𫱲𚁩🐹𩐳𞱩𛐭𞱸𛡦𪑬𫁒𩑣𭀨𜠵𚡘𛑙𚠷𛀹𞐫𜰪𦀫𜐸𚡙𛐱𚡦𛀮𝐬𭀼𝰩𚑦🐱𞀫𤰨𦀽𪐪𭀪𭀥𞀶𚑼𥀨𦐽𪐪𭀥𝐰𚐬𮀮𩡩𫁬𤱴𮑬𩐽𤠨𞀰𜀫𚁦𚠽𩠯𦐯𦀫𤰨𦐯𞐩𚐬𩠪𝐫𞐹𛁦𚰽𤰨𦀯𞀭𜐩𚠷𜀪𥀨𦐯𜰫𤰨𦀯𜰩𚐩`.replace(/u../g,"")))

Jan 10 2025 11:23 AM UTC

}// 137/140

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Complex wave pattern

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pavel

remix of d/10873 by u/yonatan

function u(t) {

for(i=0;Y=i>>5,Y<35;x[o?'clearRect':'fillRect'](0,!x.setTransform(4>>o,-o,2*o,2-o,j%T-Y%2<<6,Y*T+T*S(j*j+9*t)*S(t)**9),T=32,T))o=i%2,j=i++-o

Jun 16 2020 9:14 PM UTC

}// 140/140

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#beesandbombs #uncompressed

u/BuRRak

I love it
u/aleamb

LOVE IT!!!

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just_me_7k

function u(t) {

for(i=32;i--;x.fillRect(i*70,540,50,-S(t*9+i)*99))x.fillStyle=R(i*16,255-i*16,51)

Jun 18 2025 4:31 PM UTC

}// 81/140

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Music Bar