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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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pavel

remix of d/11472 by u/cantelope

function u(t) {

for(k=c.width|=0;j=--k>>7;x.lineTo(960*(z+4*S(t)+.43*d*((k&120)-62)+S(a))/z,1e3/z))d=.5-(j+4*t&1),z=j+.6-4*t%1+C(a=k%8*d*2.1)*2/3;x.stroke()

Dec 18 2018 11:22 PM UTC

}// 140/140

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k=[4 bits for y][4 bits for x][3 bits for hexagon vertex]

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u/pavel

16*16*8=2048~=1920 so using width
u/pavel

.43~=3**.5/4, 2.1~=2*Math.PI/3
u/pavel

120=0b1111000 so k&120=x*8
u/pavel

I'm using a single stroke and no moveTo. This is a single curve, just lined everything up.
u/pavel

d is horizontal offset, even rows are offset from odd rows. Using +4*t&1 to explicitly cycle the animation every second instead of implicitly cycling every 2 seconds. Longer cycle leads to z<0 and glitches or hexagons that don't reach the camera.
u/magna

Wow!
u/aleamb

awesome!!!
u/pavel

#uncompressed with one plane

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iznax

remix of d/17503 by u/iznax

function u(t) {

eval(unescape(escape`𩡯𬠨𪐽𜀻𬀽𚁫👩𙠶𜰩𛰲𜀬𣰽𚁪👩🠾𝠩𛰱𝀬𨐽𚁪𚱴𚠲𝐩𙠱𜠷𛀫𚱩🀲𞀰𜀻𮀮𩡩𫁬𤡥𨱴𚀹𝠰𛑃𚁏𚐪𤰨𬀩𚠵𜀰𛀵𝀰𚱃𚁰𚐪𝐰𜀬𝀹𛀲𝀩𚑸𛡦𪑬𫁓𭁹𫁥👒𚁧👓𚁡𙡫𚐪𞀰𚠨𜠮𞀭𣰩𚠨𚁡𛐴𜠩𚠪𜠫𚁫𛐴𜠩𚠪𜠼𝐶🰮𜠺𜐩𛁧𛁧𛀮𝐩`.replace(/u../g,'')))//iznax

Feb 8 2020 4:23 AM UTC

}// 140/140

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Star-Killer-Alpha

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veubeke

function u(t) {

t?c.width^=0:a=b=e=f=1;a+=e,b+=f;b>>3||x[k=b*8+a]&&x[k]--?f=-f:a>>3?e=-e:0;for(i=64;i--;)t?x[i]|i==k&&x.fillRect(i-i%8,i%8*8,8,8):x[i]=i>>5

Mar 3 2017 5:33 PM UTC

}// 139/140

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Turns out you can’t fit Breakout into 140b :D

u/iverjo

+1 for good effort :D

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taupelink

remix of d/26510 by u/taupelink

function u(t) {

eval(unescape(escape`景爨椽ㄹ㈬欽ㄲ㠻椭ⴾ欻砮晩汬⠩⥤㵴⨪琬砮扥杩湐慴栨砮晩汬却祬攽刨欫椪䌨稽椪椩⩓⡴⤬欫椪匨稩⩓⡴⤬欫椪䌨琩ⱴ⽤⤩ⱸ孤☴㼧牥捴✺❡牣❝⡩┲〪欫椪䌨稫㵴⤬稯㘥ㄱ⩫⭩⩓⡺⤬栽椯搬栬栭㘫琩`.replace(/u([^D].)/g,'$1%')))

Nov 27 2022 1:31 AM UTC

}// 140/140

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d/26524

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DaSpider

function u(t) {

if(!t){r=4,y=.55;x.fillStyle=R(8,8,8,.01)}
for(i=0;i<1e4;i++){
y=r*y*(1-y)
x.fillRect(y*1920,(r-3)*1080,2,1)}
r-=1e-3

Nov 3 2019 1:45 PM UTC

}// 117/140

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Chaos demo: Logistic map (¾)μ × y, ref. https://en.wikipedia.org/wiki/Logistic_map

u/DaSpider

The formula generates pseudo random numbers for r=4, but the distribution is not uniform.

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Xen

function u(t) {

t?x.fillText(z=frame,356+C(z)*z,214+S(z)*z):c.width=789

Apr 18 2023 10:36 PM UTC

}// 55/140

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u/_louis

nice!.. :-)

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katkip

remix of d/13446 by u/katkip

function u(t) {

t||(q=1);f=frame;for(i=-109;i++<108;)
x.fillStyle=S(f/99)*C(f/18+f/11)<S(i/9+C(f/10+i/9*S(i/9)))
?R():'#fff',x.fillRect(f*5,i*5+540,5,5)

Apr 25 2019 10:30 AM UTC

}// 136/140

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ionisingTuna

function u(t) {

c.width|=0;for(j=0;j<50;j++){for(i=0;i<100;i++){x.fillStyle=R(S(t)*50,S(t)*10*j,S(t)*10*j);x.fillRect(0,0,540+j*10,1,1);x.rotate(S(t)/300)}}

Oct 14 2019 10:06 PM UTC

}// 140/140

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maraoz

function u(t) {

c.width=99;m=(1-C(t/99))*.01;for(X=0;X<99;X++)for(Y=0;Y<99;x.fillStyle=R(c=S(m+X*Y/(m)+m*m*9)*255,0,0),Y++)x.fillRect(X*1,Y*1,1,1)

Jul 24 2016 3:27 AM UTC

}// 130/140

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f8f82804

remix of d/10658 by u/f8f82804

function u(t) {

for(c.width|=i=13;i--;x.lineTo(967+(y-1?0:1e3*S(p)/z),1e3*y/z))y='011112101211'[i],z=y-1?3:3+C(p=t+1.57*'012340302014'[i]);x.fill('evenodd')

Oct 25 2018 5:41 PM UTC

}// 140/140

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#d3 #perspective #octahedron

u/pavel

Here is 12 characters saved: c.width^=i=0;for(y of'111121012110')x.lineTo(960+y%2*S(p=t+1.6*'123403020140'[i++])*(z=1600/(3+y%2*C(p))),y*z);x.fill('evenodd')
u/f8f82804

using 1.6 to approximate Math.PI/2 is OK, but you should change all the 4s to 0s in the second data string, just to minimze the aggregate angular error. I used 4 for clarity, because 1.57 is accurate enough that the error is hard to notice. With 1.6 you can notice that one edge is longer than the others. c.width^=i=0;for(y of'111121012110')x.lineTo(960+y%2*S(p=t+1.6*'123003020100'[i++])*(z=1600/(3+y%2*C(p))),y*z);x.fill('evenodd')