Dweets awesomed by u/ximavus

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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rodrigo.siqueira

function u(t) {

B='💥';eval(unescape(escape`𭀼𜰿𚁫🐳𜠰𚡴𛁳👴𚠲𛁷👴𚡫𛰳𛐷𜀩𞠨𭰽𜐷𝐰𛁫🐭𭰬𬰽𜠵𜀩𞱦𫱲𚁩🐲𩐳𛁺👤🐰𛁹🐹𜰰𞱩𛐭𞱸𛡦𫱮𭀽𨀤𮱳𯑥𫐧𨀩𮐫👃𚁤𚰽𥀨𪐩𚐪𝀬𮀮𩡩𫁬𤡥𨱴𚁺𚰽𠰨𩀩𚰲𚱔𚁴𚐯𜰰𛁹𚱴𚠷𜀬𛠸𛁴🀱𛠶𚐻𮀮𩡩𫁬𥁥𮁴𚁂𛁫𛁷)`.replace(/u../g,"")))

Mar 3 2026 1:46 PM UTC

}// 136/140

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Under attack

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MichaMegret

function u(t) {

c.width|=0;for(i=2e3;i--;x.fillStyle='hsl('+[40-i/50,99,99-i/22]+'%)')x.fillRect(960+S(a=i)*C(b=i*i)*(r=99+S(t*2)*i/8),540+C(a)*S(b)*r,3,3)

Mar 2 2026 6:50 PM UTC

}// 139/140

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Particles bond

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skeletonNatte

remix of d/34948 by u/dee-gomma

function u(t) {

x.font='700px p';x.fillText("🎯",510,740)

Mar 2 2026 4:25 PM UTC

}// 40/140

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golfed #joke #sorry

u/cantelope

kinda ruins it for the bull

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camel_case

remix of d/34954 by u/camel_case

function u(t) {

a=w**2-h**2+i
h=2*w*h+j
w=a
x.lineTo(960+w*700,400+h*600)
x.stroke()
}
c.width|=0
var w,h,i,j
w=h=0
i=.37599
j=.2
{

Mar 2 2026 1:24 PM UTC

}// 115/140

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0.37599 + i/5 is not quite in the Mandelbrot set

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camel_case

function u(t) {

a=w**2-h**2+i
h=2*w*h+j
w=a
x.lineTo(960+w*700,540+h*500)
x.stroke()
}
c.width|=0
var w,h,i,j
w=h=0
i=-.15309
j=1.03972001
{

Mar 2 2026 1:19 PM UTC

}// 124/140

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0.15309 + 1.03972001i is not in the Mandelbrot set

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rodrigo.siqueira

remix of d/31982 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.6)invert(1)`
t?x.drawImage(c,~x.fillText('𖦹',~x.scale(s=1-C(1.5/++t)/21,s),690),~x.rotate(6)):x.translate(980,540)

Mar 2 2026 11:56 AM UTC

}// 137/140

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𖦹 Nebular #ammonite #spiral

u/ximavus

Gary's shell intergalactic edition

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dee-gomma

remix of d/34948 by u/dee-gomma

function u(t) {

with(x)r=28+~t,i=20*t%20,fill(arc(v=540,v,r*20,i*.31,6.3,moveTo(v,v,beginPath(fillStyle=R(r<2|r<22&(r==13|r==21?i:~i)&&v,r>1&r<22&~i&&v)))))

Mar 2 2026 12:50 AM UTC

}// 140/140

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Dartboard #uncompressed #waitforit

u/cantelope

wow!

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rodrigo.siqueira

remix of d/34949 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(a=b=t,i=8e4;i--;b-=b/4+C(a*3),a+=(i/b&i%2)*3.4-b*S(a*2.2)/8-a*a/4.21)x.fillRect(b*390+1450,1450-a*2e3,.1,t<1)

Mar 1 2026 7:46 PM UTC

}// 138/140

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The ammonite shell #ammonite

u/cantelope

impressive

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tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𥁛𜐶𜀰𧐫👓𚁴𚠹𚐬𨰮𭱩𩁴𪀽𭰽𜐲𞀬𪐽𜑥𝀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁩𙑷𛁩🠾𝰬𜐬𜐩𚑕👵𛁵👔𦱩𧐽𥁛𪑝𚰨𠱛𪑝𛑃𦱩𛐱𧐭𤱛𪑝𚱓𦱩𛑷𧐩𛰱𝑼𯀰𛁸𛡦𪑬𫁓𭁹𫁥👒𚀳𜠰𚡍𨑴𪀮𪁹𬁯𭀨𭐪𚁓𦱩𧐽𤱛𪑝𛑔𦱩𚱷𧐫𭑼𯀰𚐬𭐪𚁃𦱩𧐽𠱛𪑝𚱕𛑵𯁼𜀩𚐩`.replace(/u../g,'')))

Mar 1 2026 1:51 AM UTC

}// 140/140

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#FDTD #Electromagnetic Sim - Rendering #Poynting Vector (EM Flux)

Show more comments…
u/tomxor

I don't really understand maxwell equations, I just wanted to see if I could fit an FDTD into a dweet, and the Poynting vector of the EM field flow looks kinda cool.
u/tomxor

It's essentially a 2D sim of a point oscillator in a reflective box (although technically left and right wrap around), it has absolutely no physical equivalence, all parameters are normalised and tuned for visual preference.
u/ximavus

basically waves bouncing in a box? This visualization is really good though
u/cantelope

oh. well if has no physical equivalence then...
u/tomxor

I just meant that it's more abstract, because FDTD is commonly used to simulate a particular thing in real life.
u/ximavus

yeah waves bouncing in a box is the only way I understand it its a lot more complex than that

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rodrigo.siqueira

remix of d/33817 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(a=b=t,i=3e4;i--;b=b/1.15-C(a*3),a+=(i/b&i%2)*2.9-b*S(a/2)/5-a*a/4.1)x.fillRect(a*1860,b*210+603,.1,t<2)

Mar 1 2026 1:11 AM UTC

}// 139/140

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Fractal fossil

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