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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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veubeke

function u(t) {

t?r=c.offsetWidth/1920:_=x.font='3in a',x.fillText('smudge',500,680),c.onmousemove=e=>x.drawImage(c,e.x/r,e.y/r,f=50,f,_.x/r,_.y/r,f,f,_=e)

May 10 2017 4:49 PM UTC

}// 139/140

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u/katkip

Not really
u/Jezza

#interactive

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keithclark

remix of d/2561 by u/keithclark

function u(t) {

for(a=c.width|=l=C(t),m=S(t);a--;x.fillRect((d*l-S(a)*m)*h+960,(g*l-f*m)*h+520,h/=65,h))d=S(a*(f=C(a*a))),g=d*m+S(a)*l,h=800/(3+g*m+f*l)

Apr 23 2017 6:19 PM UTC

}// 136/140

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3 bytes smaller

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prawnwarp

function u(t) {

c.width|=0;for(i=0;i<1920;i+=64){for(j=0;j<1080;j+=64){x.fillStyle=`hsla(${i*j},50%,50%,.3)`;s=S((t*j*.01+i))*64+64;x.fillRect(i,j,s,s);
}}

Apr 21 2017 1:53 PM UTC

}// 139/140

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u/magna

So pretty!
u/cantelope

you can omit the closing parenthesis for hsla and save 1 delicious byte :)
u/donbright

man this is nice

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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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toxazol

function u(t) {

x.globalAlpha=.1
x.fillRect(0,0,i=w=2e3,w)
for(j=0.1;j<1;j+=0.009){
x.clearRect(w/2+.4*w*j*C(t*j*100)*C(t),w/4+.2*w*j*S(t*j*100),2/j,2/j)
}

Apr 3 2017 11:53 PM UTC

}// 140/140

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magna

remix of d/2375 by u/magna

function u(t) {

x.fillRect(x.globalAlpha=.1,0,w=2e3,w)
for(i=半=500;i--;x.clearRect(2*半+i*C(T=t-(Math.random()<2e-4)*.2),半+i*S(T),8,8));

Apr 1 2017 2:47 PM UTC

}// 119/140

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#radar

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sfz

remix of d/2171 by u/sfz

function u(t) {

c.width=w=540;t*=7;for(i=l=129;i>69;t+=i--)for(j=7;j--;)h=t*i%w,a=h-l>l,x.fillRect(t%w+(a?9*S(t/j):0),a?w/2+h%7*C(t/j):h,h<w*.6,a||9)

Mar 18 2017 5:47 AM UTC

}// 133/140

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Bit rainy

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sfz

remix of d/2158 by u/sfz

function u(t) {

c.width=w=480;x.fillRect(0,0,w,w);t*=3;for(i=99;i--;t+=i)for(j=7;j>0;x.fillText((u+'')[~~t*j%137],t%w,t*i%w-i*j--))x.fillStyle=R(0,i?w:0)

Mar 17 2017 5:15 AM UTC

}// 137/140

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Metamatrix

u/donbright

i wonder if there is a way to mix this with Kalanchoe's technique from https://www.dwitter.net/d/1395
u/donbright

something like this r=Math.random t?o.push({X:480*r(),c:~~(r()*99),Y:0,ẏ:1}):(o=[]) c.width=480 o.map(a=>(x.fillText(String.fromCharCode(a.c++),a.X,a.Y+=a.ẏ)))
u/sfz

well, if you change the for loop to something like for(i=99;i>18;t+=i--) it gets rid of the clumpy crap on the left side, but I didn't figure that out until afte posting.
u/scottglz

The clumpy crap is my favorite part
u/joeytwiddle

#matrix

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iverjo

remix of d/1791 by u/Run

function u(t) {

t*=4;c.width*=1;for(i=0;i<1550;i++)x.fillRect(X=i+S(t+i)*300,400+200*C(t+i)+200*S(X/300+t),50,50),x.fillStyle=`hsl(${X/7+t*90},80%,50%)`

Mar 2 2017 10:53 PM UTC

}// 136/140

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u/donbright

the happiest sandworm on dune
u/iverjo

#worm
u/iverjo

#colors #rainbow
u/iverjo

#sine

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magna

function u(t) {

n=64;for(j=n;j--;)for(i=n;i--;c=j<6&i<16?'@疄㖄ᖄ犜'.charCodeAt(j)-n&2<<i:S(t+=t*t|5),x.fillStyle=R(c*=255,c,c),x.fillRect(i*30,j*16,n,n));

Feb 28 2017 10:38 PM UTC

}// 135/140

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