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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Xen

remix of d/11412 by u/rnbw

function u(t) {

if(t<.1){s=4}else{s=-s*.99}if(t<.2){x.fillStyle=''}else{x.fillStyle='#abc'}x.fillRect(0,540+s*9,1,1);~~(t/4)||x.drawImage(c,3/t*9-s-8,s*9)

Dec 14 2018 7:03 PM UTC

}// 138/140

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u/rnbw

i would have done it like this, really, but the white triangles on the side took away from it
u/Xen

the alternative i tried left a blur on the right :-(

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kooga

function u(t) {

a=5;b=1+parseInt(t*2,10);d=100;
c.width=a*d;
for(i=0;i<120;i+=1){
for(j=0;j<120;j+=1){
if(i*j%b)x.fillRect(i*a,j*a,a,a)
}
}

Oct 6 2019 3:19 AM UTC

}// 123/140

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divibility!

u/metamero

incidental #opticalillusion #ScintillatingGridIllusion

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katkip

function u(t) {

/*‮*/t||(z=Y=Z=y=0,z=.9);x.fillRect(960+Z*10,Y*10,10,10);Z+=z;Y+=y,y+=Math.abs(S(t*t)/40);if(Y>108)y*=-.9,Y--;if(Z>90||Z<-90)z*=-.9

Jun 9 2019 1:24 PM UTC

}// 131/140

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#obfuscated more natural pattern

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13thptr

function u(t) {

h=N=M=0
for(i=18;i--;x.stroke(new Path2D(`M500 500L${M+(b=500)} ${N+b}L${O+b} ${P+b}`)))O=M,P=N,M=C(h+=Math.atan2(99,r=i**.5*99))*r,N=S(h)*r

Jun 28 2019 9:33 PM UTC

}// 140/140

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Spiral of Theodorus

u/donbright

awesome
u/13thptr

#spiral #math #path2d
u/13thptr

Thanks to u/joeytwiddle for the golfing help

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rodrigo.siqueira

function u(t) {

F=n=>(f=(n,t=n&&f(n-1),r=t[0])=>n?[r+r+r,...t.map(x=>x+t[n]+x)]:['█','░'],f=f(n),f.pop(),f).join`\n`
throw(F(3))

Dec 24 2018 10:15 PM UTC

}// 112/140

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Cantor Set #fractal #unicode

u/katkip

haha nice

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iverjo

function u(t) {

c.width=1920;for(i=6e3;i--;)s=1/(2100-(i+t*99)%2081),q=9e4*s*s,x.fillRect(960+2e5*s*C(i*173)-q/2,540+2e5*s*C(i*2e5)-q/2,q,q)

Jul 24 2016 2:42 PM UTC

}// 124/140

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A remake of the "Starfield" screensaver that was included in Windows 98

u/iverjo

If you watch this in fullscreen and stare at the center, your brain might be fooled into believing that you are moving
u/iverjo

#starfield #stars

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rodrigo.siqueira

remix of d/16086 by u/KilledByAPixel

function u(t) {

f=2e3;for(i=0;i<f;x.fillRect(i+T(t+i)*9-40,(i*i%5e5+!!i*t*99-t*5)%1089-9,Z=i?5+i%7:f,i++?Z:1089-t*5))x.fillStyle=i?'#fff6':'#2355'

Oct 15 2019 1:35 PM UTC

}// 130/140

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Snow storm

u/KilledByAPixel

☃️
u/aleamb

beautiful #landscape #snow #storm

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katkip

remix of d/9422 by u/katkip

function u(t) {

if(!t){l=0;r=-1}while(l<22){x.fillStyle=`hsl(${S(r+l-t)*C(r-l+t)*t*25},99%,50%)`;x.fillRect(++r*50,l*50,50,50);if(r>38){l++;r=-1}}l=0

Aug 25 2018 12:03 PM UTC

}// 133/140

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Ghoust

function u(t) {

c.width*=1
for(j=500;j;j--){a=Math.floor(t*300)+j
for(i=a;i>a-99;i--){i/a==Math.floor(i/a)?x.fillRect(960+S(a)*j*1.5,540+C(a)*j*1.5,9,9):0}}

Jul 29 2022 10:23 AM UTC

}// 140/140

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Prime Number Spiral

u/384.cz

#prime

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marquisdegeek

function u(t) {

eval(unescape(escape`󭌿󜌺󡼽󫭥󭼠󡽡󪝮󣭯󩍥󚍘󟝮󩝷󘍁󭝤󪝯󠽯󫭴󩝸󭌬󮽧󨝩󫬺󜌮󜌰󜽽󚜬󡼮󨽯󫭮󩝣󭌨󦌮󩍥󬽴󪝮󨝴󪝯󫬩󞽛󜌬󤼨󭌩󛍃󚍴󛼶󚜬󭌦󞌬󥌨󭌯󝼩󙜹󧜮󫝡󬌨󬜽󟭻󭽩󭍨󚍮󩝷󘍏󬽣󪝬󫍡󭍯󬭎󫽤󩜨󦌬󮽦󬭥󬝵󩝮󨽹󞬱󜜰󚬲󚬪󬝽󚜩󨽯󫭮󩝣󭌨󡼩󛍳󭍡󬭴󚍴󚜬󬽴󫽰󚍴󚼱󚝽󚜻`.replace(/u../g,'')))

Mar 15 2025 8:50 AM UTC

}// 140/140

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"A Windy Night" - Mouse down, speakers up!

u/marquisdegeek

(If the title is a bit cryptic, this is a soundscape composition, so you need to interact with the page first by clicking in the area)
u/rodrigo.siqueira

Very interesting sound effects. Algorithmic composition has great potential for creating innovative sounds.
u/joeytwiddle

#audio