Top dweets of all time

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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donbright

remix of d/2238 by u/aemkei

function u(t) {

r=500;c.width^=0;
t?φ.push(t):φ=[]
φ.map(φ=>{
x.fillStyle='hsl('+r*C((λ=φ*r)/2)+',99%,50%)'
x.fillRect(C(φ)*S(λ+t)*r+999,S(φ)*r+r,9,9);
})

Mar 21 2017 10:52 PM UTC

}// 138/140

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progressive trance planet

u/sfz

Morten Granau works love it

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recursive

remix of d/2176 by u/scottglz

function u(t) {

w='#fff'
for(X=71;X--;)for(Y=39;Y--;x.fillRect(X*25,Y*25+C(X/2-t)*9,25,25))x.fillStyle=X<24&Y<21?Y%2|X-Y&3|!X|Y%20<1?'#00f':w:Y/3&1?w:'red'

Mar 18 2017 5:30 PM UTC

}// 139/140

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u/joeytwiddle

#flag

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magna

function u(t) {

x.fillRect(960+960*C(t*3)-1,540+540*S(t*5)-1,2,2);x.filter='sepia(100%) invert(100%)';x.drawImage(c,10,10,1900,1060,0,0,1920,1080);

Mar 17 2017 8:18 PM UTC

}// 131/140

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#waitforit

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scottglz

function u(t) {

for(X=71;X--;)for(Y=39;Y--;)x.fillStyle=X<24&Y<21?Y%2|(X-Y)%4|!Y|!X|Y>18?'#00f':'#fff':~~(Y/3)%2?'#fff':'red',x.fillRect(X*25,Y*25+X,25,25)

Mar 17 2017 8:04 PM UTC

}// 139/140

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Needs more golfing to add an animated wave

Show more comments…
u/magna

~~(Y/3)%2 can be shortened to Y/3&1
u/magna

(X-Y)%4 can be shortened to X-Y&3
u/magna

Added some waves (not so nice): https://www.dwitter.net/d/2188
u/scottglz

I had figured out Y/3%2 before I saw your comment, but X-Y&3 eluded me. Thanks!
u/recursive

I added some different waves. https://www.dwitter.net/d/2196
u/iverjo

#flag

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tapgiles

function u(t) {

with(c)style.imageRendering="pixelated",height=44,width=80
for(i=0;i<90;i++)with(x)beginPath(),arc(40,22,(t*1+(i*t/2))%46,0,7),stroke()

Mar 15 2017 8:58 PM UTC

}// 135/140

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Caution: strobing!

u/donbright

doctor says my eyes should heal in about 4 to 6 weeks
u/iverjo

haha

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jprctr

function u(t) {

d=12
for(i=1;i<161;i++){
for(j=1;j<91;j++){
v=255-T(t+S(i+80)*t+C(j+45)*t)*125
x.fillStyle=R(v,v,v,0.1) 
x.fillRect(i*d,j*d,d,d);
}
}

Mar 14 2017 3:32 PM UTC

}// 133/140

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u/lionleaf

Hypnotic in fullscreen

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nick

function u(t) {

e=200
for(i=0;i<88;i++)for(j=0;j<50;j++)x.fillRect(e*T(i*t)+800,e*T(j*t)+550,3,3)
x.fillStyle=R(e*T(t*i),e*T(t),e*C(t*i))

Mar 14 2017 5:53 AM UTC

}// 121/140

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Disclaimer: If you stare too long, it could result in mild hypnosis and spontaneous clucking.

u/sigveseb

must. resist. temptation. to. cluck.

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mxfh

remix of d/2118 by u/mxfh

function u(t) {

x.setTransform(f=90,0,0,f,7*f,6*f);x.fillStyle='#EF3340';x.ellipse(0,0,4,4,0,0,2*Math.PI);x.rect(-7,0,f,f);x.fill("evenodd")

Mar 14 2017 3:23 AM UTC

}// 124/140

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http://www.norden.org/en/fakta-om-norden-1/t…

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@literallylara

function u(t) {

if(!window.i)c.width=300,i=[j=102,j]
for(k=50;k--;)t<3&&x.fillRect(...i=i.map(v=>v+(j=(j*-5.2877+6.1341*v+3.1346)%4-2)),1,1)

Mar 10 2017 7:55 PM UTC

}// 124/140

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u/sfz

Nice, trying to figure out how to make it stay in canvas bounds
u/aemkei

searching for the right seed …
u/donbright

awesome awesome awesome aweseom

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ivansanchez

function u(t) {

for(i=0;i<300;i++)h=(t+i)*78%360,x.fillStyle=`hsl(${h},99%,50%)`,x.fillRect(i%20*99,~~(i/20)*99,99,99)

Mar 2 2017 6:27 PM UTC

}// 102/140

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u/iverjo

#bartjs