Dweets awesomed by u/tinfoilboy

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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unts-unts-unts-unts

function u(t) {

for(c.width=1920,i=0;i++<64;)for(j=0;j++<16;)x.fillStyle=R(3*i,j*i,9*(9+C(4*t))),x.fillRect(32*i,30*j*S(t*i/7)+540,25,20);

Dec 27 2017 4:26 PM UTC

}// 122/140

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Citiral

function u(t) {

w=c.width=1920;h=1080;for(i=0;i<w/2;i++)x.fillStyle=`hsl(${C(i)*255},90%,60%)`,x.fillRect(i*2+4*S(t+i),0,1,h),x.fillRect(0,i*2+3*C(t+i),w,1)

Dec 27 2017 4:16 PM UTC

}// 140/140

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mdiehr

function u(t) {

c.width=a=190,s=13
l=r=>x.fillStyle=r,x.r=x.fillRect
for(i=0;i<8;++i)for(j=0;j<8;++j){W=((i+j)%2)*a
l(R(W+a,W+s,W/2))
x.r(40+i*s,j*s,s,s)}

Dec 27 2017 4:10 PM UTC

}// 138/140

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I couldn't fit any chess pieces without going over the limit.

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MatthieuLemoine

function u(t) {

c.width=1920
s=999*t%1500
o=200
t=x.fillText.bind(x)
x.font="190px A"
for(i=0;i<900;i+=150){t('→',s,o+i)
t('🏹',0,o+i)
t('🚶',1600,o+i)}

Dec 27 2017 4:06 PM UTC

}// 134/140

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nystrand

function u(t) {

for(i=c.width|=g=(o,a=n=7,b=8,z)=>--n?g(n>5?i*n:t/n,b*C(o)-a*S(o),z,a*C(o)+b*S(o)):x.lineTo(a*(z+=40)+960,b*z+540);i--;g(i&t/2));x.stroke()

Dec 27 2017 12:24 PM UTC

}// 139/140

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u/jaemiejaemie

reminds me of older windows screensavers, really nice!
u/iverjo

How was this made?

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jaemiejaemie

function u(t) {

c.width=640;x.beginPath();for(i=0;i<640;i++){a=180;for(j=1;j<t*60%60;j+=~~(t)%2+1){a+=S((i+t*60)*j/20)*50/j}x.lineTo(i,a)}x.stroke()

Dec 27 2017 10:31 AM UTC

}// 132/140

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demonstration of basic fourier curves (square/saw)

Show more comments…
u/sigveseb

Very cool!
u/joeytwiddle

Nice. DSP hero!
u/iverjo

Kudos!
u/RomanW

Excellent!
u/joeytwiddle

#math
u/katkip

#fourier

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itsjustmustafa

function u(t) {

x.fillRect(0,0,1920,1080);x.font="99px a";for(i=6;i>-1;i--)x.fillText(["🌞","🌍","👽","🚀","🛰️","🌌"][i],880+i*150*S(t*i),590+i*90*C(t*i))

Dec 27 2017 10:21 AM UTC

}// 134/140

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u/iverjo

+1 for the concept ;)
u/joeytwiddle

#emoji in #space #planet

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bloemelau

function u(t) {

x.font=`8em Mono`,s=
('function u(t){\n'+
(""+u).substring(12)
+` //140/140`).split
('\n');for(i in s)x.
fillText(s[i],333,++
i*111)//~QUINE

Dec 27 2017 5:22 AM UTC

}// 140/140

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u/visser

GEB++
u/bloemelau

I noticed the rendering is sometimes messed up. Just add and delete something to fix. Also, it seems the space before the bytecount dissapeared. :(

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letsbreelhere

remix of d/3826 by u/sokacsavok

function u(t) {

α=200;c.width=α*2;τ=Math.PI*2;x.font="36px A";x.fillText(['🌚','🌒','🌓','🌔','🌝','🌖','🌗','🌘'][(t|0)%8],α+C(t)*70,50+70+S(t)*70);

Dec 27 2017 3:31 AM UTC

}// 125/140

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Show more comments…
u/abrunkhorst

This is super clever!
u/sigveseb

Needs more upvotes!
u/miggy

I love the unicode 'α'
u/xem

-18b: x.fillText([...'🌚🌒🌓🌔🌝🌖🌗🌘']
u/letsbreelhere

@xem TIL!
u/sigveseb

Ooh clever use of ... operator
u/berti

so much yes
u/lionleaf

#sun #emoji #moon

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letsbreelhere

remix of d/3755 by u/letsbreelhere

function u(t) {

m=c.width/4
for(i=0;i<500;i++){
x.fillStyle = `hsl(${100},100%,${30+C(t)*C(t)*20}%)`
x.fillRect(m+m*C(t-359*i),500-m*T(t-358*i),10,10)
}

Dec 27 2017 3:10 AM UTC

}// 136/140

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