Dweets awesomed by u/lewdev

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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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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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)

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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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dee-gomma

function u(t) {

eval(unescape(escape`𛰪🎯DARTS🎯𚠯𭱩𭁨𚁸𚑦𫱲𚁩🐵𝠰𚠡𭀬𨐽𫐽𛠱𝐷𜀸𞱩𛐭𞱦𪑬𫀨𨑲𨰨𞐶𜀬𝐴𜀬𬠪𜠰𛁡𛁡𚰽𜠪𫐬𫑯𭡥𥁯𚀹𝠰𛀵𝀰𛁢𩑧𪑮𤁡𭁨𚁦𪑬𫁓𭁹𫁥👲🀲𯀨𩐽𬠽🐱𜱼𬠽🐲𜐩𙡩🰧𬡥𩀧𞡲🀳𯁥🰧𘰰𞐰𙰺嬈𙡲🀲𜠿𙰣𩡦𩠧𞠧𘰰𜀰𙰩𚐩𚐩𬠽𜁼𪐯𜠰`.replace(/u../g,'')))

Mar 1 2026 1:02 AM UTC

}// 140/140

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Dartboard 🎯

u/ximavus

These normally take a ton of code congrats

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mathisvdr

function u(t) {

for(x.fillRect(0,0,i=5e3,i);i--;x.clearRect(960+S(i)*S(q=i**.9%1.2*t%3.2-3.2)*L/(Z=C(i)*S(q)*L+1)*540,540+C(q)*L/Z*540,s=3/Z,s))L=i/4%1

Mar 1 2026 12:21 AM UTC

}// 135/140

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Dense Cloud

u/cantelope

go ahead and use the remix button for remixes. thanks!
u/joeytwiddle

Remix of d/34929

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mathisvdr

function u(t) {

for(i=2e3;i--;x.fillRect(960+S(p=i/20+t)*d,540+C(p+t*.3)*d,s,s))d=8e4/((i+t*99)%999+1),s=d/8,x.fillStyle=R(i*C(i),i/6,255,.12)

Mar 1 2026 12:20 AM UTC

}// 126/140

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Pink Drift

u/cantelope

neat

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mathisvdr

function u(t) {

F=(X,Y)=>S(X/15+t*3)*99+C(Y/15+t*2)*99
for(X=96;X--;)for(Y=55;Y--;x.fillStyle=`hsl(${F(X*4,Y*8)+X} 90%50%)`)x.fillRect(X*20,Y*20,20,20)

Mar 1 2026 12:14 AM UTC

}// 135/140

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Plasma Grid

u/cantelope

very cool

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𬠽𬐽🠨𚁩𚱱𚐪𚠮𞐥𜐩𛐮𝐬𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛁷🐱𩐴𛁷𚐬𪐽𭰻𪐭𛐻𮀮𨱬𩑡𬡒𩑣𭀨𞐶𜀫𨑛𪐥𜱝𚠨𫀽𚀨𭀫𚁩𛰹𯀰𚐩𙐶𚐯𝠪𚁩𙐲🰭𜠺𜠩𚐯𚁚👡𦰨𪐫𜠩𙐳𧐪𫀫𜐩𚠨𪀽𝐴𜀩𛁨𚱡𦰨𪐫𜐩𙐳𧐪𫀯𦠪𪀬𬰽𜰯𦠬𬰩𚑡👛𬠨𜀩𛁲𚁷𚐬𛠵𧐻`.replace(/u../g,'')))

Feb 28 2026 11:12 PM UTC

}// 136/140

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expanding spheres, but they're cubes

u/ximavus

theyre Minecraft blocks nice

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DazeWare

remix of d/34939 by u/DazeWare

function u(t) {

for(r=t*5e3,i=k=r/24<<1||1;t<1&&i--;x.fill())for(x.beginPath(j=4);j--;)x.arc(960+r*S(a=i/k*710),540+r*C(a),70,b=j-a+(frame%k%2),b)

Feb 28 2026 2:46 PM UTC

}// 130/140

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DazeWare

remix of d/34931 by u/DazeWare

function u(t) {

for(r=t*5e3,i=k=r/24<<1||1;t<1&&i--;x.fill())for(x.beginPath(j=4);j--;)x.arc(960+r*S(a=i/k*710),540+r*C(a),70,b=j-a+(frame%k),b)

Feb 28 2026 2:44 PM UTC

}// 128/140

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