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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fervour

function u(t) {

for(i=10;--i;){x.fillStyle="#"+((i*128)+~~(t*8));x.fillRect(0, (i-1)*128+S(t*8)*60, 32, 128);}x.drawImage(c, 10, 0)

Mar 27 2018 11:46 AM UTC

}// 115/140

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u/loni_art

wow!

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BalintCsala

function u(t) {

c.width=500
for(i=3;i--;)for(j=99;j--;)(x.fillStyle=`hsl(${i*120},99%,${60+(H=S(t*2+(j/20))*9*(1-j/120))}%`,x.fillRect(50+j,50+i*20+H,1,23))

Mar 26 2018 4:14 PM UTC

}// 140/140

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Waving flag (of something) with shading

u/joeytwiddle

Nice work! I managed shading and colours before, but not both together. d/3161
u/iverjo

#flag

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DirtyDan

function u(t) {

for(c.width+=i=0;i++<99;x.globalCompositeOperation='xor')x.beginPath(x.fill()),x.arc(960+i*T(a=3*S(t)),540+3*C(T(i/120+(a<0?t:-t))),i*5,0,7)

Mar 25 2018 6:22 PM UTC

}// 140/140

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If you want to remix, for extra space delete "a=" and replace "(a<0?t:-t)" with t. That stuff just reverses the direction of the ripple depending on what side it's on.

u/magna

Awesome!
u/DirtyDan

check out d/6724
u/DirtyDan

* d/6812

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Agnes

function u(t) {

with(x)for(w=c.width=1920,i=100,translate(w/2,540);i--;r=w/i,rotate(T(t/30)),strokeRect(m=-r/2,m,r,r));

Mar 25 2018 4:46 PM UTC

}// 103/140

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(Looks way better in full screen.)

u/joeytwiddle

#tunnel #spiral #mercury #timeless #doctor_strange

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prplz

function u(t) {

x.fillStyle=`hsl(${t*=66},50%,50%)`
for(X=120;X--;)for(Y=60;Y--;)((X-60)**2+(Y-30)**2+t)**.45%1>.95&&x.fillRect(X*16,Y*16,16,16)

Mar 25 2018 10:04 AM UTC

}// 128/140

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robbyg

function u(t) {

w=c.width=192,t||(y=[54]);y.push(Y=y.pop(),Y+(Math.random()-.5)*4);y=y.slice(-w);for(i=y.length;i--;)x.lineTo(i,y[i]);x.stroke()

Mar 19 2018 6:01 PM UTC

}// 128/140

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Inspiration from @alien https://www.dwitter.net/d/5150

u/alien

this is nice, i guess i was trying to force it too much by using sine waves function...

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magna

remix of d/7281 by u/magna

function u(t) {

c.width|=0;for(j=n=10;--j;)for(i=100;i--;X=i%5+j*n+S(t)*30,Y=i/5|0,x.fillStyle=R(r=255-(X-50)**2-Y**2,r,r),x.fillRect(400+X*n,400+Y*n,n,n));

Mar 11 2018 7:03 AM UTC

}// 140/140

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#default

u/fujimotos

#light

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akm

remix of d/7203 by u/fujimotos

function u(t) {

a=280;b=2;t*=2;
i=a*C(a+t)+500*C(t)
j=a*S(t)-10*S(b*t)
x.font='150px s'
x.fillStyle=`hsl(${t*44},90%,60%`
x.fillText('╳',i+900,j+540)

Mar 7 2018 9:00 PM UTC

}// 133/140

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dwardu

function u(t) {

r=n=>Math.floor(Math.random()*n)
x.font='48px Verdana'
for(i=0;i<99;i++){
x.clearRect(p=r(40)*48,q=r(22)*48,48,48)
x.fillText(r(10),p,q+48)}

Feb 28 2018 3:51 PM UTC

}// 140/140

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u/donbright

fun
u/dwardu

😀

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AnnanFay

remix of d/7047 by u/BuRRak

function u(t) {

throw p+=(f%4*4-4)/(f++*f++*f)};{p=3,f=2

Feb 25 2018 7:01 AM UTC

}// 40/140

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Golfing u/BuRRak π calculation using Nilakantha's series

u/AnnanFay

Alternatives are: 33 chars using Wallis product but *very* long time to converge. 24 chars using Newton-Raphson if sin & cos allowed.
u/BuRRak

Mind = blown
u/iverjo

#pi