Dweets awesomed by u/leonarven

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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leonarven

function u(t) {

for(i=w=c.width=600;i--;)x.fillRect(w/2+C(t+i)*S(i/97)*w/6,w/3+S(i/1)*w/6,3,3)

Aug 19 2017 3:17 PM UTC

}// 78/140

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leonarven

function u(t) {

for(i=w=c.width=600;a=C(t+i)*S(t/19),b=S(i/11)+C(t+i+3)*S(i/13+3)/9,i--;)x.fillRect(w/2+a*100,200+b*200,s=4-2*Math.sqrt(a**2+b**2),s)

Aug 19 2017 3:10 PM UTC

}// 133/140

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Not what I was originally doing x)

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Xen

remix of d/3050 by u/leonarven

function u(t) {

for(c.width=i=99;j=99,i--;//Jah Bless!!
)while(j--)x.fillStyle=R(255*C(i*j-t),255*T(i*j+t)),x.fillRect(i,j,1,1)

Aug 10 2017 7:26 PM UTC

}// 111/140

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leonarven

function u(t) {

for(c.width=i=127;j=127,i--;)while(j--)x.fillStyle=R(d=255*S(i*j+t),255*C(i*j+2*t),d),x.fillRect(j,i,1,1)

Aug 10 2017 5:37 PM UTC

}// 105/140

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u/jick

Wow!

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leonarven

remix of d/2726 by u/unwiredben

function u(t) {

x.fillStyle=R((a=t*60|0)%255),
x.font="80px courier",
x.fillText('\\/'[Math.random()*2&1],a%52*36,((a/52)|0)%18*60+60)

Aug 9 2017 8:31 PM UTC

}// 118/140

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Just for exercise

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leonarven

remix of d/1973 by u/jes5199

function u(t) {

for(g=new Float32Array(1),t*=60,b=1080;b--;)(g[0]=18*(t-960)*(b-540))-g[0]>0&&x.fillRect(t,b,1,1)

Aug 9 2017 6:55 PM UTC

}// 97/140

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Just for exercise

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leonarven

function u(t) {

P=[k=[w=1920,h=1080],[0,h],[w/2,0]];while(w--)k=[(k[0]+(p=P[Math.round(Math.random()*2)])[0])/2,(k[1]+p[1])/2],x.fillRect(k[0],k[1],1,1)//:)

Aug 9 2017 3:42 PM UTC

}// 140/140

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My first one, written with mobile phone only. Not really handy :)

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cantelope

function u(t) {

for(V=(c.width=1e3)/2,H=j=99;j--;x.stroke())for(x.beginPath(),i=H,Z=i-j;i--;x.lineTo(V+X/Z*V,(S(i/5+C(t)*4)*C(j/9-t*7)*j/9+30)/Z*V))X=H-i*2

Aug 6 2017 6:10 AM UTC

}// 139/140

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mostly what i was going for... not exactly.

u/joeytwiddle

smooth

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magna

function u(t) {

c.width|=0
x.lineCap='round'
for(x.lineWidth=i=45;i--;x.stroke())x.beginPath(),x.arc(960,540,50+(j=i%10)*50,a=S(t+i)*3,a+Math.abs(C(t*5)))

Apr 28 2017 5:28 PM UTC

}// 138/140

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donbright

function u(t) {

k=t
for(m=-k;m<=k;m++)for(n=-k;n<=k;n++){
r=m*m-n*n,B=m*m+n*n,G=2*m*n
x.fillRect(4*(r+B),4*(G+B),9,9)
}

Apr 14 2017 4:14 AM UTC

}// 103/140

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weird optical illusion after it finishes

u/iverjo

Oh yeah, it looks like there are white horizontal and vertical lines, but they are not actually there
u/joeytwiddle

Oooh yeah. I was only seeing grey dots at the intersections before, but on this bright monitor I can see the white lines too. *blinks*
u/alien

nice
u/Xen

i eat my pillow tonight and i'm blaming you!
u/donbright

lol sorry

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