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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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Current theme challenge: #Food

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logistikalism@gmail.com

function u(t) {

for(i=1;i<13;i++){for(j=1;j<7;j++){x.fillRect(150*i+S(t*(i))*55,150*j+C(t*j)*55,10,10)}}

Oct 20 2018 3:14 PM UTC

}// 88/140

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tomxor

remix of d/10534 by u/tomxor

function u(t) {

k=160,i=1e3,w=.04
for(t+=32;p=i&1,m=k/C(t/i)+p*(k/2+i%k),i--;)x.fillRect(
960+m*S(n=t/16+i*i)*C(!p*i/t),
540+m*C(n+p*2),s=w-C(n)*w,s)

Oct 20 2018 1:58 PM UTC

}// 133/140

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#space #saturn #drawing

u/katkip

oh wow
u/joeytwiddle

Very nice. Set w=.2 if you don't want to #waitforit
u/tomxor

Oops, this doesn't seem to work at all in some browsers... showing up the aignificant subpixel interpolation differences between canvas implementations. Works in chrome - soz

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akx

function u(t) {

for(c.width=i=500,x.font="300px sans";i--;)with(x)save(),beginPath(),rect(0,i,1e4,1),clip(),fillText("👻",99+30*S(.02*i+5*t),270),restore()

Oct 20 2018 12:40 PM UTC

}// 139/140

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spooky!!!

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pythech

function u(t) {

x.fillRect(t,t,t,t)
u(t*4)

Oct 20 2018 9:43 AM UTC

}// 27/140

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Super resolution images using deep learning

u/pythech

Chrome-specific
u/S.T.L.K.R.

LOL

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sh4kesbeer

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<t+5&&i<10;i++)
x.fillRect(400+i*100+S(t)*300,400*i/(t-i)**4-S((t+i)*((t+i)%5))*20,50,200)

Oct 20 2018 1:28 AM UTC

}// 132/140

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u/aleamb

#default

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jbrewhaha

function u(t) {

c.width=1920
for(k=1;k<15;k++)
for(j=1;j<15;j++)
for(i=1;i<10;i++)
 x.fillRect(960+960*T(t-i-k),540+540*T(t-j-k),10,255)

Oct 19 2018 10:12 PM UTC

}// 120/140

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Does this give anyone else anxiety?

u/joeytwiddle

Yes, today the flicker and warping is making me a bit nauseous. Thanks!

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aemkei

remix of d/10510 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,n=2e3,n)
for(i=n;i--;)x.clearRect(960+290*T(~t*i),530+200*S(t+6*S(i)),9,9)

Oct 19 2018 8:39 PM UTC

}// 89/140

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veubeke

function u(t) {

c.width^=0
x.fillStyle=R(T=255,T,T,.2,x.font=T+'px"',x.fillText('Fog',760,560))
for(i=20;i--;)x.fillRect(850+C($=t/9+i)*180,T+S($)*200,T,T)

Oct 19 2018 7:18 PM UTC

}// 139/140

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ersagun

function u(t) {

j=C(T=t*4-S(t*8)/2)-S(Math.acos(1-Math.abs(i=S(T))))
z=(a,k)=>(a*(3-C(T/27))+k)*99
x.lineTo(z(i,9),z(j/1.5,7))
x.stroke()

Oct 19 2018 6:55 PM UTC

}// 121/140

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I thought I should start simple. Heart formula I used here is a parametrization of a heart formula I derived some years ago.

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katkip

function u(t) {

if(!t)r=Math.random,a=95,b=50;a+=r()<.5?-1:1;b+=r()<.5?-1:1;x.fillStyle=`hsla(${S(a)<C(b)?100:60},99%,50%,.3)`;x.fillRect(a*10,b*10,25,25)

Oct 19 2018 6:55 PM UTC

}// 138/140

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#challenge add more entities with different colors. If you think you are a genius, make them fight lol