Top dweets by u/ETHproductions

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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ETHproductions

function u(t) {

c.width=1920;for(i=99;i--;)for(j=99;j--;)Math.hypot(i,(j+t*30)%200)%20>9&&x.fillRect(960-C(j/32)*S(i/32)*200,540-C(i/32)*200,3,3)

Jan 5 2018 9:58 PM UTC

}// 129/140

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Figured out how to draw a rotating sphere from a black and white pattern. This is the pattern being used here: https://i.imgur.com/khgNg7E.png

u/Xen

nice!
u/geb

#background

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ETHproductions

remix of d/5543 by u/Bugsy

function u(t) {

for(i=c.width=2e3;--i;x.fillRect(i,540-w/2+S(i/43)*9+(q=960-i)/2*(q>>31)**i,2,w))w=.5**(i/99-t*4%27+5)**2*99+9

Jan 5 2018 9:05 PM UTC

}// 110/140

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ETHproductions

remix of d/2526 by u/eruonna

function u(t) {

t?c.width|=onkeyup=e=>{p=t;n++}:n=p=0
x.font='64px monospace';((u+`
`).slice(y=0,n)+'| '[(t-p)*2&1]).split`
`.map(r=>x.fillText(r,0,y+=64))

Aug 11 2018 3:00 PM UTC

}// 139/140

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Hacker typer, but the cursor resets when a key is pressed. Had to sacrifice the reset at the end...

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ETHproductions

remix of d/2522 by u/magna

function u(t) {

((c.width|=y=0,x.font='64px monospace',u+`
`).slice(0,t*3+S(t)*5)+' |'[t*2&1]).split`
`.map(r=>x.fillText(r,0,y+=64))

Aug 11 2018 2:41 PM UTC

}// 117/140

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Down to 117, looks nicer on the canvas too... Still no room for typos though!

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ETHproductions

function u(t) {

c.width=1920;for(i=-99;i<=99;)x.beginPath(),x.arc(960,540+S(i/63)*300*S(t),250-i*i/40,0,7),x.fillStyle=++i+t*20&8?'#fff':'#000',x.fill()

Oct 21 2017 12:35 AM UTC

}// 136/140

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u/cantelope

hehe. reminds me of a certain donut from a certain video. :D
u/magna

Getting there...

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ETHproductions

function u(t) {

s=7,t?x.drawImage(c,0,-s):a=[l=1];for(q=0,i=++l;i--;x.fillStyle=j?'#000':'#fff',x.fillRect(i*s,1080-s,s,s))q=q*2%8|a[i-1],j=a[i]=110>>q&1

Sep 24 2018 7:18 PM UTC

}// 137/140

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Rule 110

u/ETHproductions

If there's a short way to move the entire drawing a few pixels, it would allow quite a bit more room for messing around...
u/joeytwiddle

Bring out q to shave off two: s=7,x.drawImage(c,q=t?0:a=[l=1],-s)
u/katkip

WOW! AWESOME

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ETHproductions

remix of d/9909 by u/gho.xlrtx@gmail.com

function u(t) {

for(I=t||(X=960,Y=540,D=10,F=J=Q=0,N=1);I;++J>2*F&&(Q=F++%2?D:-D,J=1),J>F?Y+=Q:X-=Q)for(I=++N**.5|0;N%I--;);x.fillRect(X,Y,D,D)

Sep 21 2018 2:32 AM UTC

}// 127/140

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Ulam Spiral, golfed and modified to add a prime each frame

u/katkip

Nice

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ETHproductions

function u(t) {

(f=_=>eval("c.width|=0;x.font='64px monospace';for(s=`(f=${f})()`.slice(y=0,t*9%177);s;s=s.slice(50))x.fillText(s.slice(0,50),0,y+=64)"))()

Aug 10 2018 8:08 PM UTC

}// 139/140

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#quine that "types" itself on the screen

u/ETHproductions

The eval("...") is necessary because... well... just try with (f=_=>{...})() instead.
u/ETHproductions

I guess u/magna did a much better version already, go check his out: d/2516
u/BalintCsala

We should probably instrument anything passed to eval too...

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ETHproductions

remix of d/5709 by u/BackendForth

function u(t) {

t&&a<1920||(a=b=q=0,p=t*77%23+4,h+=20)
x.fillStyle=`hsl(${h},90%,${55+q/4}%)`
x.fillRect(a+=p,b,99,149)
b+=q++
b>930&q>0?q*=t%1/9-.9:0};{h=0

Jan 8 2018 11:12 PM UTC

}// 140/140

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u/sigveseb

#solitaire

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ETHproductions

function u(t) {

c.width|=onkeydown=e=>(e=e.keyCode-37)?e-1?e-2?e-3||Y++:X++:Y--:X--;x.fillRect(X*9,Y*9,60,60)};{X=Y=70
// game template. arrow keys to move

Nov 2 2017 1:53 AM UTC

}// 139/140

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Very rudimentary game template. Not sure how much more anyone can do with <40 bytes, but you never know ;)

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