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: #Opposites

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joeytwiddle

function u(t) {

l=localStorage,c.onclick=()=>l.clear()
c.width|=i=1,x.font='3em monospace'
Object.keys(l).forEach(k => x.fillText(k+'='+l[k],9,i++*70))

Nov 6 2019 5:47 AM UTC

}// 135/140

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localStorage viewer. Click on the canvas to CLEAR ALL!

u/joeytwiddle

Visit the #localStorage hashtag to repopulate some keys ;-)
u/metamero

#tool
u/joeytwiddle

Ooof it was done before: d/5099

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joeytwiddle

remix of d/16396 by u/KilledByAPixel

function u(t) {

x.globalAlpha=.2;for(i=340;--i;x.fillRect(960+S(m*m)*q,540+C(m*m)*q,50,50))m=i+120*t,q=5e4/i,x.fillStyle=R(i*i/50,i*i/84,i*i/300)

Nov 1 2019 2:44 PM UTC

}// 129/140

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Supernova variation KBAP-201911011455

u/joeytwiddle

Replace 50,50 with s=60*S(i+t),s to vary brush size

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joeytwiddle

remix of d/16368 by u/tomxor

function u(t) {

throw`  __\n/__/\\\n\\__\\/`

Nov 1 2019 4:50 AM UTC

}// 28/140

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28 byte cube yo!

Show more comments…
u/joeytwiddle

(works a bit better with line-height: 1)
u/KilledByAPixel

Nice! ■ <- one char, it is a cube from the side ;)
u/katkip

#throw #text clever
u/DataMeta

Haha!
u/aleamb

lol!
u/joeytwiddle

This was my entry when everyone was golfing their #cube

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joeytwiddle

remix of d/16160 by u/katkip

function u(t) {

for(i=1920;i--;)y=69*t,Z=690/y,X=(i-960)*Z,x.fillRect(i,y+30*S(S(X/89+Z*11)*C(X/79-Z*6)+C(X/69+Z*9))/Z,.2,1/Z**.69)

Oct 27 2019 7:16 AM UTC

}// 115/140

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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/9574 by u/katkip

function u(t) {

for(i=0;i<2e2;i++)x.fillStyle=`hsla(${i*2+t*99},${99*S(t/i)}%,50%,.03)`,x.fillRect(960+S(t)*9*i,540+C(t)*9*i,i*C(i/t),i*C(i+t))

Oct 3 2019 5:39 AM UTC

}// 127/140

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Smudge and shine

u/joeytwiddle

Not a patch on d/9008 tho

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joeytwiddle

remix of d/3247 by u/joeytwiddle

function u(t) {

x.fillStyle='#000',x.fillRect(0,0,1920,1080),X=960+1200*C(t)
x.fillStyle=R(255,X/9,0),x.beginPath(),x.arc(X,1100-600*S(t),199,0,7),x.fill()

Sep 13 2019 3:14 PM UTC

}// 139/140

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Happy Mid-Autumn Festival!

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joeytwiddle

remix of d/15127 by u/veubeke

function u(t) {

c.width|=0;x.font='9em"';['🌾','🐄','🥩','🍔','💩'].map((C,j)=>{for(i=12;i--;)X=((i+t)%12)-6,x.fillText(C,900-(1-2*(j%2))*X*192,160+220*j)})

Jul 24 2019 1:37 PM UTC

}// 135/140

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u/donbright

vegetarian version would be a lot less rows
u/veubeke

:D
u/iverjo

It's the ciiiircle of liiiiiiiife, and it moves us aaaaall
u/joeytwiddle

lol iverjo
u/joeytwiddle

Do the two rows moving right look faster than the three rows moving left? #opticalillusion

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joeytwiddle

function u(t) {

c.width|=0;for(i=2;i--;)s=i?99+80*S(t*3):9,x.font=P=s+"px sans",
T=i?P:'X'.repeat(400),
x.fillText(T,960-x.measureText(T).width/2,540+s/3)

Jul 24 2019 8:53 AM UTC

}// 138/140

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To centralise #text vertically, add ~fontSize/3

u/joeytwiddle

To centralise horizontally, subtract x.measureText(T).width/2
u/joeytwiddle

(I think u/f8f82804 showed me that trick)

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joeytwiddle

remix of d/14827 by u/joeytwiddle

function u(t) {

c.width=600
d=(r,T)=>x.fillText(T,300+r*S(a=i/9.55),172-r*C(a))
for(i=N=t|0;i;i--)
for(N%i||d(90+i/4,i),k=75;k--;)N%i||d(k,'*')

Jul 15 2019 7:15 AM UTC

}// 127/140

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Divisors on a clock (second hand version) #math

u/katkip

awesome
u/aleamb

love it!
u/donbright

super cool
u/joeytwiddle

Shouts to u/donbright and u/taupelink

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