Dweets by u/dwardu

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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dwardu

remix of d/7149 by u/dwardu

function u(t) {

x[m='fillRect'](0,0,999,400);x[m](999,130,50,140)
navigator.getBattery().then(b=>x.clearRect(990,9,981*(b.level-1)*(1-t%b.charging||1),382))

Mar 5 2018 8:48 AM UTC

}// 140/140

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Battery status indicator. Works in Chrome: https://caniuse.com/#feat=battery-status

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dwardu

remix of d/7149 by u/dwardu

function u(t) {

c.width=99
x[m='fillRect'](89,18,4,9)
x.strokeRect(9,9,80,27)
navigator.getBattery().then(b=>x[m](9,9,80*b.level*(t%b.charging||1),27))

Mar 4 2018 9:55 AM UTC

}// 135/140

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Charging animation speed is now constant… and program is 5 chars shorter.

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dwardu

function u(t) {

navigator.getBattery().then(b=>{c.width=99
x[m='fillRect'](89,18,4,9)
ℓ=b.level
x[m](9,9,80*(b.charging?t%ℓ:ℓ),27)
x.strokeRect(9,9,80,27)})

Mar 3 2018 11:23 PM UTC

}// 140/140

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u/AnnanFay

Laptop only?
u/dwardu

Works on mobile/laptop, but on desktop appears as “100% & charging.” I would have liked to tackle this by modifying the expression to “ℓ<1&&b.charging?t%ℓ:ℓ”, but I couldn’t find a way to reduce a further 5 characters!
u/dwardu

Could be written as “ℓ<1&”, so 4 characters really.
u/AnnanFay

Hmm, on desktop-windows-firefox I'm just getting "navigator.getBattery is not a function"
u/AnnanFay

Ah, this would explain it: "From Firefox 52 onwards, the Battery Status API is only available in chrome/privileged code."
u/dwardu

Yes, after your comment I did some research and made this discovery too.

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dwardu

function u(t) {

x.drawImage(document.querySelector('#stats canvas'),0,0,1920,1080)
x.font='200px Verdana'
x.fillText('😛',860,540)

Mar 3 2018 6:14 PM UTC

}// 113/140

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u/BirdsTweetCodersDweet

Why the square?
u/dwardu

It’s a real-time plot of Frames-Per-Second vs time; if it’s looking like a rectangle/square, it’s because your FPS is constant.

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dwardu

function u(t) {

r=n=>(Math.random()*n|0)*96
x.drawImage(c,r(19),r(10),192,192,r(20),r(11),w=96,w)
x.fillStyle=R(z=r(2)**2,z,z)
x.fillRect(r(20*9),r(11),w,w)

Mar 1 2018 8:03 PM UTC

}// 140/140

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Splits 1920px×1056px canvas into 20×11 grid of 96px×96px tiles. Once every 9 frames fills a random tile black or white. Every frame picks a random 2×2 group of tiles and draws it onto a random 1×1 tile at ½ the size.

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dwardu

function u(t) {

x.drawImage(c,0,0,1920,1080,16,32*Math.random(),w=1888,h=1048)
x.strokeStyle=R(z=255*S(t)**2,z,z)
x.lineWidth=32
x.strokeRect(16,16,w,h)

Feb 28 2018 10:22 PM UTC

}// 136/140

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Bumpy ride.

u/dwardu

drawImage() arguments 0,0,1920,1080 may be dropped!

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dwardu

function u(t) {

x.drawImage(c,0,0,1920,1080,8+16*S(t/5)**2,t%32,w=1888,h=1048)
x.strokeStyle=R(z=255*S(t)**2,z,z)
x.lineWidth=32
x.strokeRect(16,16,w,h)

Feb 28 2018 9:26 PM UTC

}// 136/140

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drawImage() arguments 0,0,1920,1080 may be dropped!

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dwardu

function u(t) {

r=n=>Math.floor(Math.random()*n)
x.font='48px Verdana'
for(i=0;i<99;i++){
x.clearRect(p=r(40)*48,q=r(22)*48,48,48)
x.fillText(r(10),p,q+48)}

Feb 28 2018 3:51 PM UTC

}// 140/140

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u/donbright

fun
u/dwardu

😀

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dwardu

function u(t) {

c.width|=0
v=.8*C(t)
d=.3+.3*S(30*t)
x.beginPath()
x.moveTo(p=100+(100*t)%1720,q=540+440*S(t))
x.arc(p,q,100,v+d,v-d)
x.lineTo(p,q)
x.fill()

Feb 28 2018 2:16 PM UTC

}// 140/140

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dwardu

function u(t) {

u.f=u.f?1:m=μ=b=β=1
r=Math.random
x.beginPath()
x.moveTo(m,μ)
a=b;α=β
b=r()*960;β=r()*540
x.quadraticCurveTo(2*a,2*α,m=a+b,μ=α+β)
x.stroke()

Feb 28 2018 12:19 PM UTC

}// 140/140

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u/katkip

me when bored:

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