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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.

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

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pavel

function u(t) {

for(c.width=i=640,n=32,q=2*t%1*n|0;i--;x[X>7&X<12&[810,865,1858,9808][q>>3]>>i/8+X+6?'fillRect':'strokeRect'](X*n-q,(i&-n)-q,n,n))X=i%n

Apr 16 2020 7:25 PM UTC

}// 135/140

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Keep Gliding Mr Conway

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u/pavel

#gameoflife #glider
u/pavel

https://www.reddit.com/r/perfectloops/commen…
u/Xen

love it!
u/joeytwiddle

#tribute
u/rodrigo.siqueira

Wow! I've been using this Glider image (also known as HACKER EMBLEM) for years as my computer wallpaper, here is full hd version of my wallpaper: https://in.bot/agi/Hackers-emblem-Carbon-Gli…
u/Qwitter

Life was definitely a gateway drug for me as well.

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DataMeta

remix of d/16988 by u/katkip

function u(t) {

c.width|=0;x.scale(23,23);for(i=96;i--;)for(j=54;j--;)if((i^j)%(g=2+~~t%7))x.fillRect(i+S(t*4+j/g)-1,j+S(t*4+i/g)-1,z=.9,z)

Dec 26 2019 5:35 PM UTC

}// 123/140

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u/magna

Sweet!
u/sigveseb

very nice
u/gambit

hi im new! can you explain me "c.width|=0" what does it do? thanks
u/DataMeta

Welcome! It's a shorter way of clearing canvas pixels/state. Can be chained like so: for(c.width|=n=i=256;i--;). It can't be done here because we must clear the canvas before scaling it
u/includeRubiks

so cool

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yonatan

function u(t) {

with(x)for(c.width|=i=26;i--;clip(fill(arc(960+S(z/9+t)*T,T=540,z**3/9,0,9))))fillStyle=`hsl(${i+t*9&1?0:T} 50%${i*2}%`,beginPath(z=i+t*9%1)

Sep 7 2019 9:55 PM UTC

}// 140/140

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#tunnel

u/0x04

Wow, great piece! <3
u/aleamb

amazing!

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taupelink

function u(t) {

for(i=1e4,d=e=0;i--;)x.fillRect(d*1920,e*1080,1,1),d+=([-1,0,1,2][r=Math.random()*4|0]-d+d*e)*.45,e+=([2,-1,0,2][r]-e-d*d)*.45

Jul 25 2019 5:55 PM UTC

}// 126/140

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a nonlinear four-point #chaosgame

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u/rep_movsd

Looks like a charcoal sketch of mountains
u/nuc

Fantastic!
u/KilledByAPixel

👍
u/donbright

really great
u/moto

cloudy)
u/taupelink

d/15141

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rodrigo.siqueira

function u(t) {

v=(a,b,Φ,r)=>{for(i=0;i++<r;)x.fillRect(a-=S(Φ),b-=C(Φ),s=r/18,s)
r>9?v(a,b,Φ+.5,r*=.72)&v(a,b,Φ-.5,r):0}
if(t<2)v(S(t**7)*3e3,1e3,0,72*t*t)

May 31 2019 3:04 PM UTC

}// 140/140

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Autumn forest #tree #recursive #fractal #organic

u/13thptr

nice
u/katkip

Awesome!!
u/SMON

Φ <3
u/aleamb

amazing!

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New_Core

function u(t) {

for(c.width|=i=12;i--;x.fillText('🚮',960-300*S(a=(S(t+j/2)+9%v)%v+i%2*v)/2+120*C(a),j*254+99*S(t),300*S(a)))j=~~(i/2),x.font="6cm'",v=1.58

Mar 27 2019 9:22 PM UTC

}// 138/140

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u/prplz

~~(i/2) can be i>>1
u/jylikangas

Clever use of maxWidth!
u/katkip

Wow
u/user0

n

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keithclark

remix of d/11328 by u/keithclark

function u(t) {

for(x.fillRect(0,0,j=2e3,j);j--;x.clearRect(C(j)*r+960,S(j*j)*r+540,k=r>>8,k))r=900/(4-(t+j/13)%4)

Dec 7 2018 11:15 AM UTC

}// 98/140

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Golfed down to 98 bytes

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u/keithclark

Also fixes some glitches in the original
u/keithclark

swap ,k=r>>8,k for ,r>>=8,r to save a byte (97)
u/keithclark

also r=900/(4-(t+j/9)%4) => r=j/(4-(t+j/9)%4) (94)
u/iverjo

Very nice #starfield
u/keithclark

for(x.fillRect(0,0,j=2e3,j);j--;x.clearRect(C(j)*r+960,S(j*j)*r+540,r>>=8,r))r=j/(7-(t+j)%7) (92)
u/jylikangas

for(x.fillRect(0,0,j=2e3,j);j--;x.clearRect(C(j)*r+960,S(j*j)*r+540,r>>=8,r))r=j/(7-t++%7)(90)
u/keithclark

nice!
u/keithclark

for(x.fillRect(0,0,j=2e3,j);r=j--/(7-t++%7);)x.clearRect(C(j)*r+960,S(j*j)*r+540,r>>=8,r) (89)
u/jylikangas

Yes!
u/vain

very nice!
u/384.cz

#starfield

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jylikangas

function u(t) {

t?i=t*9|0:c.width=-1
r=i<10?C(4/i)*89:i
x.fillStyle=R(r*7,r*3,y=i*9)
x[f='fillRect'](150-r,y,r*2,i-11)
x[f](y-99,i&&98,s=i?-9:1e3,s-y*y%49)

Nov 30 2018 4:12 PM UTC

}// 139/140

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We built this city on synthwave

u/magna

Whoa!
u/aleamb

wow!!!
u/aleamb

#city #landscape #stylish #eighties
u/aleamb

#waitforit
u/katkip

Awesome

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tomxor

function u(t) {

c.width=w=120
for(i=w*33;i--;x.fillRect(i%w,i/w*2,1,2))f=i%w+t*60,n=T(0|(i/w+f^f-i/w)/(t**.7+6)),x.fillStyle=R((n&1)*i/n/8,n**n,(n&3)*i/n/4)

Nov 3 2018 5:53 PM UTC

}// 140/140

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#retro #fractal #game

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u/tomxor

For the lazy game designer... Just add chip tunes and a player :D
u/tomxor

#crt #degauss #sidescroller
u/magna

Awesome!
u/magna

I had a RGB CRT setup, but I hadn't been able to fit any interesting patterns: d/7512
u/tomxor

I had a look at yours magna, they are true crt, much more realistic i think. The scan lines on this are just a sideeffect I exploited and it was easy to add colour distortion in the R().
u/magna

Here we go: d/10843
u/C010011012

is it a cellular automata?
u/tomxor

Yes and no, it's a fractal n=T(0|(i/w+f^f-i/w)/(t**.7+6)) which is just a more elaborate variation of serpinsky triangles to produce more interesting patterns. Some fractals are automata, but not all automata are fractals, see here: https://en.wikipedia.org/wiki/Rule_90
u/tomxor

The implication is serpinsky triangles are computationally reducable, meaning it does not have to be computed in the same way as a cellular automata i.e state can be computed at step t directly without traversing intermidiate steps.

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joeytwiddle

remix of d/10788 by u/joeytwiddle

function u(t) {

eval(unescape(escape`琪㴮㜻景爨椽㘰〻椭ⴻ砮捬敡牒散琨㤶〭圬㤹⭩ⰲ⩗ⰱ⤩圽⠶〰⩩⵩⩩⤪⨮㔻景爨樽㤻樭ⴻ砮晩汬剥捴⠹㘰ⴵ〰⩃⠲⩴⤭猪⡪ⴴ⤯㌬㐰〭猪匨㠰⩴⤪⠨樭㐩⨪㈩⨪⸵⼲⸹⵳⼲⬸〪匨㐪琩ⱳⱳ⤩猽㤫吨琯㕼簸⤪⨸`.replace(/u(..)/g,"$1%")))

Oct 31 2018 7:22 AM UTC

}// 140/140

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Halloween moon bat

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u/yonatan

This is great! wings are definitely worth the extra 44 chars
u/magna

I'm smiling uncontrollably. Was on a video conference. Had to turn off camera.
u/magna

The comedic timing of the animation is perfect!
u/magna

#waitforit
u/lionleaf

#halloween
u/joeytwiddle

Thank you. Although it was supposed to make you scream...
u/Xen

i was already screaming if that counts.... ;-)