Dweets awesomed by u/joeytwiddle

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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DazeWare

remix of d/34288 by u/DazeWare

function u(t) {

for(i=3e3;i--;x.fillRect(i,t*99+99*S(t),.1*S(t*9),z*t))for(z=0,j=9;--j;z-=F(Y=S(t/j)*j/3-2-S(z+j)+j,X=i/7/j)+Y/5)F=k=>S(Y)*2-C(X)/5+S(X/2)

Sep 13 2025 2:58 AM UTC

}// 138/140

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rodrigo.siqueira

remix of d/34282 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(x.globalAlpha=.1,0,i=2e4,i),h=540;i--;x.clearRect(960-1/C(i)/Z*h,h+S(l)/S(i)/Z*h,s=4/Z+3,s))Z=C(l=i*i+t/3)/S(i)*l/(t+1)**9|0

Sep 12 2025 6:45 PM UTC

}// 139/140

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Star melting (15 seconds to complete)

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ArchMisspelled

function u(t) {

q=0
w=0
m=[[0,0],[1,0],[.5,1]]
for(i=1;i<99;i++){
p=m[Math.round(Math.random()*2)]
q=p[0]+q/2
w=p[1]+w/2
x.fillRect(q*500,-w*500+999,2,2)}

Sep 7 2025 9:47 AM UTC

}// 138/140

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Sierpinski triangle chaos game

u/joeytwiddle

Nice! For even distribution, you can *3 and floor. Or golfed: p=m[i**t%3|0]

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HardlyProductive

function u(t) {

for(x.fillStyle="#0001",x.fillRect(0,0,2e3,2e3),x.fillStyle='red',i=38;i--;m=t+i,k=450*C(m),x.fillRect(960+k*C(m*2/3),540+k*S(m*2/3),9,9));

Sep 6 2025 5:16 AM UTC

}// 139/140

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tomxor

remix of d/28068 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𭰽𨰮𭱩𩁴𪀦👩🐸𜰲𜀻𪐻𫀾𜐦勺𦐫𨠪𥀩𙠨𤠫𩀪𥀦𦀫𨐪𥀼🀲𚐼𝀿𥀿𥀯🐮𞐺𤠫🐮𜐺𥀿𥀦👸𛡦𪑬𫁒𩑣𭀨𛐭𪐥𭰬𪐾🠷𛀱𛐱𛱬𛁒🐱𚐺𤠭👔🐮𜐩𦀽𪐥𭰯𝠴𚡒𛑒𛁙👩𛰸𩐳𚡒𛑒𛰲𛁬👍𨑴𪀮𪁹𬁯𭀨𨐽𤰨𭀩𚠳𛑘𛁢🐱𛑙𛁤👃𚁴𚐪𜰫𝐭𤠩𚠨𜠭𥀩`.replace(/u../g,'')))

Sep 4 2025 11:35 PM UTC

}// 139/140

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If Wolfenstein 3D had Dynamic Lighting

u/lewdev

Holy crap! Another table flipping dweet! This is amazing!
u/jellyedwards

Wow that's incredible
u/joeytwiddle

Great!! #light #lighting #shadow
u/magna

-1 missing unit tests
u/cantelope

...

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Daithi

function u(t) {

v=-2e3;for(i=2e4;i--;)
(j=S(i+t))>.7&&(x.fillStyle=R(v,v),x.fillRect(j**3*S(i*i)*300+v+i%2*800,C(t/2)*C(i*i)*300+v,p=40+(v<=0)*i,p),v=535)

Sep 3 2025 2:31 PM UTC

}// 139/140

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Eyes in the dark

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KilledByAPixel

function u(t) {

for(c.width|=j=0;j<2e4;x.fillRect(...j++?[j/7,S(a)*19+j%12*99,3,9]:[460,0,1e3,2e3]))x.fillStyle=R(v=j?(j%2?S:C)(a=j/200-t)<0?79:210:139,v,v)

Aug 29 2025 4:36 AM UTC

}// 140/140

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Pointy vs Round Lines #Illusion

u/KilledByAPixel

https://www.reddit.com/r/opticalillusions/co…

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joeytwiddle

remix of d/34230 by u/gunno

function u(t) {

c.width|=0
for(x.fillRect(0,0,i=2e4,i);i--;x.clearRect(960+S(t+i)*(200*S(k)+500*S(k+C(i)/3)**(i/9)),540+C(k)*200,3,3))k=i**3

Aug 27 2025 11:17 AM UTC

}// 124/140

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gunno's planet, inverted and golfed (and i -> i/9)

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rudahee

function u(t) {

for(x.fillRect(0,0,i=1000,540);i--;)r=i,a=r/20-t*3,d=780+C(a)*r,f=550+S(a)*r,x.fillStyle=`hsl(${a*120},50%,50%)`,x.fillRect(d,f,225,225)

Aug 27 2025 6:11 AM UTC

}// 136/140

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first test!

u/joeytwiddle

Good start!

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rodrigo.siqueira

remix of d/34233 by u/cantelope

function u(t) {

for(x.fillRect(0,0,i=1.5e4,i);i--;x.clearRect(960+S(l+=t)/S(q=i%2<.5?n:3.2-n)/(Z=C(l)/S(q)+1)*(h=540)*2,h+C(q)/Z*h,4,4))n=(l=i**.9)%2

Aug 26 2025 7:31 PM UTC

}// 133/140

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Outside the Stanford Torus #space #torus

dwitter.net | joeytwiddle (59520)