Dwitter - javascript demos in 140 characters

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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rodrigo.siqueira

remix of d/27494 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,w=2e3,w),i=1e4;i--;x.clearRect(w/2+S(p=T(i**5+t)+t/19)/(Z=T(i)/3),w/4+C(p+4)/Z,K=3*S(t*3+i**3)**2,K))x.globalAlpha=.09

May 9 2023 12:40 PM UTC

}// 137/140

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Atomic energy levels

u/magna

Pretty!

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Xen

remix of d/27498 by u/deobfuscate

function u(t) {

for(i=50;i--;x.globalCompositeOperation='xor')x.fillRect(S(i-t)*960+960,540,C(t-i)*50,T(t+i/9)*300)

May 9 2023 8:30 PM UTC

}// 99/140

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quick play

u/Xen

also loops
u/deobfuscate

Woah thats trippy

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camel_case

remix of d/16856 by u/camel_case

function u(t) {

d="f1233o1455u2455i3455l1236 0067a0543b6144".split``
x.font='4em"'
x.fillText(w+=d[n=d[n+new Date%4+1]*5],~(t-1)*650,~~t*80)
}var w="",n=0
{

May 11 2023 11:09 PM UTC

}// 140/140

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Dadaist poem generator V2

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Odog8

remix of d/27501 by u/Odog8

function u(t) {

a=t%1>.1?[...a.map((X,i)=>Q[x.fillRect(i,A,1,X)|a[i-1]|4*a[i+1]|2*a[i]]),0]:[A=1,Q=[...Array(c.width=99)].map(x=>.5>Math.random())];A++

May 9 2023 8:15 PM UTC

}// 135/140

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Missed an obvious golf

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deobfuscate

function u(t) {

frame==1?c.width=1e3:x
x.globalCompositeOperation='xor'
t>3?t=-5:x
x.fillRect(t*1e3%1e3,(t*1e3)%600,200,200)

May 10 2023 6:30 PM UTC

}// 108/140

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XOR hut

u/tomxor

tomxor approves of this

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brad-ellert

function u(t) {

c.width|=0;for(i=0;i<200;i++){x.fillStyle=R(i*5%255,i*3%255,i*7%255);x.beginPath();x.arc(960+150*S(k=t+i/5),540+150*C(k),5,0,7);x.fill();}

May 11 2023 3:00 AM UTC

}// 138/140

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ChatGPT: colorful spiral pattern

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deobfuscate

remix of d/27499 by u/rodrigo.siqueira

function u(t) {

c.width=100
for(x.fillRect(0,0,w=100,w),i=1e4;i--;x.clearRect(w/2+S(p=S(i*5)+t/19)/(Z=S(i-t)/i),w/4+C(p/t+i)/Z,K=3*S(i*w-t)**2,K))x

May 11 2023 1:38 PM UTC

}// 131/140

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Dust Particles

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Smorg

function u(t) {

c.width=1920;
for(i=7;i--;)for(j=150;j--;x.beginPath(x.fill()))x.arc(960+100*i*C(t/i+j/70),540+100*i*S(t/i+j/70),j===149?(i*2.5)+15:5,0,10)

May 7 2023 9:54 AM UTC

}// 139/140

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Orbiting Planets

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rodrigo.siqueira

remix of d/26274 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,w=2e3,w),i=2e4;i--;x.clearRect(w/2+S(p=T(i**5))/(Z=T(i+t)/99),w/4+C(p+S(i*2)+Z)/Z,T(i-t+S(i+t)*9)/9,.7))x.globalAlpha=.04

May 6 2023 6:16 PM UTC

}// 140/140

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Nuclear reactions

u/Joachim

Wow!
u/BuRRak

This would make for a sick wallpaper
u/andrea270872

nice, kind of nuclear! :D

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Odog8

function u(t) {

a=t%1>.1?[...a.map((X,i)=>Q[x.fillRect(i,A,1,X)|a[i-1]|4*a[i+1]|2*a[i]]),0]:[A=1,Q=[...Array(8),c.width=99].map(x=>.5>Math.random())];A++

May 9 2023 8:13 PM UTC

}// 137/140

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Plays random cellular automata

u/Odog8

im thinking about using substr
u/joeytwiddle

Why not run them in order? Are the early ones boring? Maybe boring for someone quite familiar with them.
u/Odog8

Kind of, a lot are just straight lines when starting from a single cell at the start
u/Odog8

Also more fun this way ;)
u/joeytwiddle

Understood!