Dweets awesomed by u/pangolin

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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Current theme challenge: #Opposites

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MrM@_S

function u(t) {

if(!t)c.width-=d=i=400
onkeydown=e=>{r=e.keyCode;d+=r==65?-1:r==68?1:0;i+=r==74?-1:r==76?1:0;if(r==32)c.width^=0}
x.fillRect(d,i,3,3)

Apr 18 2017 12:52 PM UTC

}// 133/140

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etch-a-sketch A and D as the left knob and J,L as the right knob. Space for a clear

u/Polyducks

This is so smart! Have you drawn anything with it?
u/MrM@_S

sort of...but not anything that great
u/joeytwiddle

Very cool!

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hscells

function u(t) {

c.width=1920
x.lineWidth=6
for(i=0;i<20;i+=2)x.arc(960,540,i*30,i,i-(S(t*3)-1)*(Math.PI-2.5)),x.stroke()

Apr 17 2017 11:36 AM UTC

}// 104/140

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donbright

remix of d/2495 by u/joeytwiddle

function u(t) {

t?s=2e3/c.clientWidth:(a=b=B=A=1,k=j=2)
K=k-a
J=j-b
Q=K**2+J**2
x.fillRect(a+=A+=K/Q,b+=B+=J/Q,9,9)
onmousemove=e=>(k=e.pageX*s,j=e.pageY*s)

Apr 15 2017 10:43 PM UTC

}// 140/140

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mouse = gravitational body (explanation https://www.patreon.com/posts/simulating-in-… )

u/joeytwiddle

Nice :) For a few spare bytes, you could place the body with onclick
u/gabrielsroka

#interactive
u/donbright

#physics

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eruonna

function u(t) {

for(c.width&=i=-9;i<9;i++,x.fillStyle=`hsl(${9*i},99%,50%`,x.beginPath(),r=i*40,x.arc(960+r*S(t/Math.abs(i)),540+r*C(t/i),20,0,6),x.fill());

Apr 14 2017 8:43 PM UTC

}// 140/140

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u/donbright

fascinating that they dont seem to overlap (ever?)

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joeytwiddle

remix of d/1763 by u/New_Core

function u(t) {

onkeyup=e=>{T||a.close();a=new AudioContext;o=a.createOscillator();o.connect(a.destination);o.frequency.value=7*1.06**e.keyCode;T=o.start()}

Apr 13 2017 12:32 PM UTC

}// 140/140

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A piano you can play with your keyboard. G is middle-c, i think

Show more comments…
u/joeytwiddle

Twinkle little star: GGNNPPN LLKKIIG NNLLKKIx2 GGNNPPN LLKKIIG
u/joeytwiddle

Silent Night: G IG D, G IG D, N NK, L LG, (I IL KIG IGD)x2, N NQ NKL P LGDGEB L
u/joeytwiddle

Star Wars: (IIIN U SRPZ U SRPZ U SRSP)x2 I IK KSRPN NPRP KM, I IK KSRPN UP. I IK KSRPN NPRP KM, IIN LJI GED BI. IKNSP
u/joeytwiddle

Thanks to @donbright who showed me where i could save 5 chars
u/iverjo

Very impressive :D
u/donbright

this is unbelievable. (ps thx but i stole the idea from others here)
u/donbright

(ok technically they gave it to me prob @cantelope / @manga)
u/Woodmouth

This is the strangest piano i've ever played, but good job!
u/Woodmouth

Also, i found a way to stop it, just press shift. (or any other key with a value too high or low to hear (At least i think that's what happens))
u/joeytwiddle

and of course thanks to New_Core for the intro to Web Audio API
u/joeytwiddle

#audio #music #piano #interactive
u/joeytwiddle

Star Trek intro: R M P H, F KP OKHMR RV Q T L, J OT SOLQV VZ
u/joeytwiddle

Star Trek main: B-L-KIGFE, C B-N-LKIGF, E-D FGIKLKN Q, P N D, I G (ILPS!)
u/joeytwiddle

One more you might know: NPSP WWU, NPSP UUS, NPSP S UR N NU S
u/joeytwiddle

Check the old comments for some simple tunes to play. You'll need to click on the blank canvas for keyboard focus. Hit Space, Shift or Escape for "silence".

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joeytwiddle

remix of d/1763 by u/New_Core

function u(t) {

c.onclick=_=>window.a||(a=new AudioContext,o=a.createOscillator(),o.connect(a.destination),o.start(),c.onmousemove=e=>o.frequency.value=e.x)

Apr 8 2017 8:22 PM UTC

}// 140/140

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Starts making noise if you click on the canvas. Hopefully you can silence it by going left, but no guarantees!

u/cantelope

"woooOOOOoooOOOO" :D
u/magna

It's a dweetheremin!
u/joeytwiddle

Yes it is :) More fun with a wider frequency range: o.start());c.onmousemove=e=>o.frequency.value=5*e.x
u/lionleaf

Haha, amazing! Fullscreen gives you a wider audio range :)
u/joeytwiddle

#audio #interactive

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magna

function u(t) {

c.width|=0;for(i=m=118;i--;c=m&(1<<i%7)?54:4,X=i*100,x.fillRect(X-c/2,700,c,220),x.fillRect(X-2,920,4,m));

Apr 5 2017 6:37 PM UTC

}// 106/140

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Piano keys prototype

u/recursive

golfed it by 12: https://www.dwitter.net/d/2439
u/magna

#piano

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pangolin

function u(t) {

t||(a=new Audio(),c.onclick=e=>{a.src=`http://u.onloop.net/ks3f7Ny/${~~(e.pageX/28)}.mp3`;a.play()})

Mar 31 2017 5:47 PM UTC

}// 100/140

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Click Piano

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nonce

remix of d/2357 by u/Jenky

function u(t) {

w=c.width|=0
c.style.filter=`hue-rotate(${-t%60}deg`
for(i=0;++i<99;)z=50+i*i/80,x.font=z+`px a`,x.fillText('🌳',(S(i)*w+t*z*4)%(w+z)-z,z*5)

Mar 31 2017 4:47 PM UTC

}// 139/140

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Show more comments…
u/cantelope

Looks great in chrome. seems the filter does not work in ff.
u/cantelope

i see now it simulates the changing of the seasons. very cool!
u/nonce

May I ask what FF are you on? I have FF 52.0.2 (on MacOS) and it seems to work.
u/donbright

color does not work on firefox / ubuntu. 52.0.1 64 bit, however it still looks amazing in black and white! i just love the whole effect of it, brilliant.
u/cantelope

@nonce I checked it in FF 45.8 on Win10 ( screenshot http://lookie.ml/i-12BLJO ), but Chrome is my primary browser. I've noticed that unicode tends to render somewhat inconsistently between browsers, which is why i avoid using it. But it's a great graphical hack when it works. :D
u/nonce

Oh my, it might not be consistent but I almost spat my soda all over my screen when I saw that screenshot.
u/Lazy1337

#landscape
u/Lazy1337

#trees
u/joeytwiddle

2023: working on FF Nightly on Android

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mxfh

function u(t) {

t||(c.onmousemove=e=>x.lineTo(e.pageX*3.3,e.pageY*3.3),c.onwheel=e=>{x.lineWidth+=e.deltaY,e.preventDefault(),x.beginPath();})
x.stroke()

Mar 23 2017 3:24 AM UTC

}// 137/140

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u/sfz

the wheel is a nice easter egg!
u/mxfh

for fullscreen remove the factor. or calculate new as c.width/c.scrollwidth
u/mxfh

#interactive #draw

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