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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Jezza

function u(t) {

A=M=(Y=frame)/60-9;for(X=1919;X--;){B=N=X/60-16;for(i=9;i--;)[A,B]=[C(A-B)+M,S(A+B)+N];x.fillStyle=R(Z=A*A*B*B*50,Z,Z);x.fillRect(X,Y,1,1)}

May 14 2019 1:10 AM UTC

}// 139/140

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u/vinca

beautiful. Similar to ink painting.

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pavel

remix of d/10605 by u/anotherkitten

function u(t) {

for(c.width|=i=32;i--;)for(j=12;j--;x.fillRect(860+S(A=t%1/5+(i&1?i:-i)/10)*600,700+C(A)*300*S(t)-j*16,200,16))x.fillStyle=R(p=j*16,p,p)

Oct 22 2018 5:57 PM UTC

}// 136/140

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u/13thptr

#torus #d3

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ximavus

function u(t) {

x.reset()
for(i=9;i--;)x.fillRect(400+i*99+S(t.toFixed())*300,400,50,200)

Nov 8 2025 5:09 PM UTC

}// 73/140

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Lagging #default

u/ximavus

I had uploaded it twice accidentaly
u/joeytwiddle

lol I hate it!
u/ximavus

:)

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pavel

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👦👧🐾𚁫𙐱𝠦𙠱𚱫𙐲𚠮𝀱𝀩𚡧𚁡🐮𝰸𝐴𚠨𪰫𜠯𚀱𚰱𩐳𚠪𚁴𙐱𚠴𛑩𚐩𚐩𛁫🐵𝰻𪐽𛐭𪰾🠴𞱸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𝰰𜀪𦀯𮠭𬰬𝐴𜀫𝰰𜀪𦐯𮠭𬰬𬰪🐲𛁳𚐩𦱘𛁙𛁚𧐽𦱘👦𚁃𚐬𪐭𜠬𩠨𤰩𛁘𛁩𛐲𧐮𬱬𪑣𩐨𭀥𜰩𛁺🐳𚱚𛁳🐹𞐯𮠯𮠻`.replace(/u../g,'')))

Jun 19 2019 3:43 AM UTC

}// 139/140

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Rubik's Cube Movement

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u/pavel

191 for(c.width|=f=g=>(k%16&&1+k%2*.414)*g(a=.7854*(k+2/(1+1e3**(t%1*4-i)))),k=57;i=--k>>4;x.fillRect(960+700*X/z-s,540+700*Y/z-s,s*=2,s))[X,Y,Z]=[X=f(C),i-2,f(S),X,i-2].slice(t%3),z=3+Z,s=99/z/z
u/katkip

too good.
u/username

Rubik's Cubes cannot move the middle layer
u/pavel

If you hold the sides the middle moves, no? How could it not!
u/pavel

Here are notation-only moves for(c.width|=f=g=>(k%16&&1+k%2*.414)*g(a=.7854*(k+y*2/(1+1e3**(t%1*4-i)))),k=57;i=--k>>4;x.fillRect(960+700*X/z-s,540+700*Y/z-s,s*=2,s))[X,Y,Z]=[y=i-2,X=f(C),f(S),y,X].slice(t%3),z=3+Z,s=99/z/z
u/username

Technically you are moving both sides at the same time in that case instead of moving the middle layer.
u/katkip

^
u/pavel

That's not what technically means. You have a mental model that only permits sides to move, and you have that model because adding middle rotations would be notationally redundant in that model. This does not mean middle rotations are somehow impossible or that they definitely consists of two side rotations.
u/username

Erm, the middle layer is attached to the core, that is what I mean. It is about the construction of a Rubik's Cube.
u/username

http://www.madehow.com/images/hpm_0000_0007_…
u/pavel

Still seems like this is a matter of perspective. You are chosing a perspective in which the core is always fixed, even though the motion I am describing specifically involves holding the two sides fixed and rotating the core... In my reference frame the core is rotating. So what if the core contains more parts than the side pieces when you take the cube apart?
u/13thptr

that escalated quickly
u/donbright

maybe they dont actually move like this... but they should!

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rodrigo.siqueira

remix of d/34910 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia('
for(i=1e4;i--;x.fillRect(960+X*20,540-Y*50,t<3,.1))F=i%(32/t),
X=F*S(k=i/t)-F*S(K=k/1.1)*2,Y=F*C(K+S(K))

Mar 24 2026 1:54 PM UTC

}// 136/140

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Light at the end of the tunnel #train

u/cantelope

nice

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FireFly

remix of d/1690 by u/FireFly

function u(t) {

s=t?t<.1?s.replace(/\d/g,i=>+i?'-0+1+0-':'+1-0-1+'):s:'0';c=s[t*60|0];c<2?x.translate(0,16,x.fillRect(0,0,3,16)):x.rotate(c+1.05)

Mar 3 2017 4:49 PM UTC

}// 129/140

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Same as parent, but golfed and abusing time for the first 6 frames to evaluate/expand the L-system. The straight line at the start is an artifact of this and the particular choice of system.

u/donbright

love this method
u/SpecialAgent

love this series
u/katkip

#fractal

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Xen

remix of d/5150 by u/alien

function u(t) {

for(c.width=i=500;i--;x.lineTo(i,99+20.5*S(~~(.04*i+t))+9*C(i/9)));x.stroke()

Jan 1 2018 10:48 PM UTC

}// 77/140

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u/sigveseb

Kinda looks like a city skyline
u/donbright

awesome
u/donbright

@sigveseb totally i see it now!!
u/alien

oh .... the simplicity....

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thorri

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 2:17 PM UTC

}// 122/140

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jylikangas

function u(t) {

c.width=-1
for(k=i=150;i--;)x[f="strokeRect"](i%6*64,i/5<<6,-37,i&3?40:20)
for(;i++<k;x.rotate(11/7))x[f]((i*32+t*k)%620-300,(i/2<<5)-k,9,4)

Apr 24 2020 1:34 PM UTC

}// 140/140

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City Traffic Simulator

u/katkip

#city #simulation
u/tomxor

Nice! deserves some remix :)
u/Xen

nice
u/KilledByAPixel

🚗

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Agnes

function u(t) {

w=1920;h=1080;t==0&&(x.fillStyle='#c22',x.fillRect(0,0,w,h)),t>0&&(u(t-.5),x.fillStyle=R(5*t,255-t,t),x.fillRect(w/2-t*S(t),h-5*t,t,.1*t))

Jan 5 2018 10:35 PM UTC

}// 138/140

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