Top dweets 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.

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

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joeytwiddle

remix of d/18737 by u/tomxor

function u(t) {

D=[5,4,7]
g=(n=3,s='')=>n?[...'X012345*/+-&|^~'].map(c=>g(n-1,s+c)):q(s)
q=E=>{try{D.every((Y,X)=>Y==eval(E))&&(S=E)}catch{}}
t||g();throw S

May 15 2020 5:51 AM UTC

}// 140/140

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Expression Miner (bruteforce)

u/joeytwiddle

Unfortunately I couldn't use alert(S) so I had to drop some numbers!
u/joeytwiddle

Tryn=4 and either D=[1,3,7] or D=[1,1,4,27] #unimproved
u/joeytwiddle

Rather than searching, it might be more productive to display/draw some of the unusual small expressions, so we can look for ways to use them in future

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joeytwiddle

remix of d/17674 by u/Layl

function u(t) {

r=Math.random
t%2<.1&&(x.beginPath(R=1),x.fillStyle=t&2?'#fff1':'#2042')
R*=1.07,v=r()*R
x.lineTo(960+1.5*C(a=r()*99)*v,540+S(a)*v)
x.fill()

Feb 23 2020 6:38 PM UTC

}// 140/140

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Endless Purple Crystal Growth

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joeytwiddle

function u(t) {

c.width=9,x.fillStyle=`hsl(${3*t},99%,${30-20*C(4*t)}%)`,x.fillRect(0,0,9,6),c.style.filter=`blur(${20-20*C(t/5)}vw)`

Feb 16 2020 10:24 AM UTC

}// 117/140

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Escape from the canvas (only in Chrome,)

u/joeytwiddle

Works best in dwitter's dark theme
u/joeytwiddle

Oh no, they fixed it! For a while the blur extended out of the iframe.

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joeytwiddle

function u(t) {

f=n=>200*C(Math.PI*t/n)**98
s=(Math.round(t)-t)**2<.0002
x.fillText(s?Math.round(t):'|',t*50,9+f(1)+f(2)+f(3)+f(5)+f(7)+f(11)+f(13)+f(17))

Oct 24 2019 7:08 AM UTC

}// 138/140

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It was supposed to find primes but it doesn't

u/joeytwiddle

because primes divide themselves! (Better in fullscreen)
u/joeytwiddle

Perhaps if we don't add f(N) until prime N is found... also needs a sharper f
u/joeytwiddle

It's an analogue Merseinne seive, using smooth spikes for repetition

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joeytwiddle

remix of d/9780 by u/prplz

function u(t) {

c.width=-1;for(x.scale(X=15,15);X--;)for(Y=15;Y--;x.fill())for(x.beginPath(i=6);i--;)x.lineTo(C(a=(i*4.2+.5+t+C(t))/4)+X*2+Y%2,S(a)+Y*1.7)

Sep 12 2018 5:25 AM UTC

}// 138/140

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Hexagons, slowly spinning clockwise

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joeytwiddle

remix of d/3427 by u/corruptio

function u(t) {

t?x.drawImage(c,9*S(t),t*60%600,999,1):navigator.mediaDevices.getUserMedia({video:1}).then(e=>(c=document.createElement`video`).srcObject=e)

Jun 8 2018 5:57 PM UTC

}// 140/140

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Trying to revive last year's #camera dweet

u/joeytwiddle

But it's prevented by security policies in the latest Chrome and idk what in Firefox.
u/joeytwiddle

Aha! It works if you run it without an iframe: https://dweet.dwitter.net/id/8504?autoplay=1
u/joeytwiddle

But I'm afraid it doesn't work now

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joeytwiddle

remix of d/7355 by u/New_Core

function u(t) {

for(i=a=720;i--;x.fillRect(i?a*S(i*99)*s+955:0,i?a*C(i)*s+535:0,k=i?s*9:2e3,k))s=99/((i+t*a)%a-a),x.fillStyle=i?`hsl(${i*2},99%,50%`:'#0005'

Mar 18 2018 5:38 AM UTC

}// 140/140

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Remixing New_Core's Starfield 1

u/New_Core

this one is nice.. with small change to.. for(i=a=720;i--;x.fillRect(i?a*S(i*99)*s+955:0,i?a*C(i)*s+535:0,k=i?s*9:2e3,k))s=99/((i+t*99)%a-a),x.fillStyle=i?hsl(${i},99%,50%:'#0001'

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joeytwiddle

remix of d/3519 by u/cantelope

function u(t) {

for(R=Math.random,w=960,i=w*4,x.globalAlpha=.02;i--;x.fillRect(w+S(p=w*R())*Z*w,540+C(p)*Z*w,1,1))Z=5/9*R()**.3

Nov 18 2017 6:34 AM UTC

}// 111/140

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Stochastic sphere

u/joeytwiddle

Higher alpha draws faster, but I like the delicate texture of low alpha
u/joeytwiddle

But I did make a faster version in the end: #3631

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joeytwiddle

function u(t) {

c.onclick=()=>speechSynthesis.speak(new SpeechSynthesisUtterance(`This dweet can speak. Here are the deets: `+u))

Aug 6 2017 8:11 AM UTC

}// 113/140

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A speaking dweet (simple version)

u/joeytwiddle

Inspired by this 1k: http://www.pouet.net/prod.php?which=71407#VO…

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