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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magna

remix of d/10833 by u/magna

function u(t) {

t||(a=Array(w=1920).fill(0))
x.drawImage(c,0,0,w,w-9,0,1,w,w)
for(i=w;i--;x.fillRect(i,0,1,1))x.fillStyle=`hsl(${a[i]+=C(T(i/w)+t)},99%,50%`

Nov 4 2018 5:23 PM UTC

}// 140/140

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Xen

function u(t) {

x.ellipse(999,Z=500,t*Z%Z,t*Z%Z,t,1,7);x.stroke()

Dec 12 2017 5:47 PM UTC

}// 49/140

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49byte ellipse test

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egeres

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 25 2017 11:20 AM UTC

}// 122/140

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mark1626

remix of d/22174 by u/taupelink

function u(t) {

for(i=k=256;--i;x.fillRect(960+k*X*C(Y),540+k*X*S(Y),w=i/t/t,w))f=i*t,X=f*f%5,Y=X*f%13,x.fillStyle=R(q=i*S(T(X)+Y),T(X+q/i)*i,i*T(q/i))

Mar 28 2021 11:13 AM UTC

}// 135/140

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Sort of a Yin-Yang

u/joeytwiddle

They say that yellow clashes with blue, and red clashes with cyan. But I think green and magenta do it best.

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joeytwiddle

function u(t) {

c.width|=0
for(i=9;i--;)x.fillRect(485+i*100+300*T(q=t+i/9)**5-200*S(q*2)**8,500-400*S(q*2)**16,50,200)

Mar 14 2022 5:31 AM UTC

}// 103/140

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Rewrite/redux of an earlier dweet: "Disney candlesticks"

u/joeytwiddle

The original version: d/7584

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magna

remix of d/2545 by u/prawnwarp

function u(t) {

c.width|=0;for(i=0;i<1920;i+=64){for(j=0;j<1080;j+=64){x.fillStyle=`hsla(${i*j},50%,50%,.3)`;s=S((t*T(i&j^t)))*64+64;x.fillRect(i,j,s,s);
}}

Apr 22 2017 5:02 PM UTC

}// 140/140

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u/joeytwiddle

Very pretty! It reminds me of this awesome 256b: https://linusakesson.net/scene/a-mind-is-bor…

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rodrigo.siqueira

remix of d/23669 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(`
A=a=b=.8/t;s=400
for(i=1e4;--i;b=A,A=a)x.fillRect(900+a*s,480+b*s,1,t<5),a=.4-b+Math.abs(a/2+1/b/2e3)*(A/3-.5)

Aug 29 2021 12:23 AM UTC

}// 134/140

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Axon formation around a multinucleate alien cell

u/sigveseb

Nice!
u/Toby

Fab! Do you have a source reference for the kind of iterated formula you're using?
u/rodrigo.siqueira

You can see the original equation by changing the to "s=70" and the end to: a=1-b+Math.abs(a)
u/rodrigo.siqueira

It's based on the "Gingerbreadman Map" #gingerbreadman https://www.dwitter.net/d/14641 I don't understand the details but I know that "Even the simplest mathematical expressions, when interpreted as dynamical systems, yield fractals."
u/Toby

Ahhhh yes of course! I remember Gingerbreadman now! Thank you Rodrigo!

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lewdev

remix of d/34010 by u/skeletonNatte

function u(t) {

eval(unescape(escape`景爨樽ㄲ㭪ⴭ㬩景爨椽㤬愽㤰㭩ⴭ㭢㵪㴽ㄱⱸ⹦楬汓瑹汥㵢㼢⌰㔵∺∣䌸䄢ⱸ⹦楬汒散琨房〺椪愫㘰〬房〺横愫㈸〬房㉥㌺猪愬房㉥㌺愩⥳㴢ᠤ$ÿÿ쌢⹣桡牃潤敁琨権⹴潓瑲楮木㈩⹰慤却慲琨㠩孩崠`.replace(/u([^D].)/g,'$1%')))

Jun 20 2025 1:41 AM UTC

}// 139/140

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u/skeletonNatte's Profile Image (colored & centered)

u/skeletonNatte

Happy to be your muse
u/lewdev

I really couldn't help myself. It was really fun doing this.

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0227011

remix of d/31794 by u/0227011

function u(t) {

a=(c.height=1080)/2;x.translate(960,a);for(n=0;n<99;n++){x.rotate(1^1 %2*(r=a*S(n)**1)/2);w=S(s=t+n+400);x.fillRect(n*C(2*s*1.6),50,2,s);
}

May 15 2024 9:31 PM UTC

}// 139/140

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a=(c.height=1080)/2;x.translate(960,a);for(n=0;n<99;n++){x.rotate(1^1 %2*(r=a*S(n)**1)/2);w=S(s=t+n+400);x.fillRect(n*C(2*s*1.6),50,2,s); }

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rodrigo.siqueira

remix of d/29357 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(a=b=t,i=4e4;i--;b+=C(a*3)/7-a*b/6,a+=r*.5+b*S(a*3)/5-.3*a)i&8&&(r=i/b&1),x.fillRect(a*1000+99,b*440+400,.1,t<3)

Jan 26 2024 7:51 PM UTC

}// 140/140

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Mushroom fractal object #spiral

u/jdspugh

Amazing