Dweets awesomed by u/donbright

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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Bombo

function u(t) {

l=300;w=c.width=1920;g=(a,b,y,z)=>x.fillRect(w/2+a,w/4+b,y,z);for(i=180;i--;)g(i+l*C(t+i*2),l*S(t*5+i),9,9),g(l*C(t+i*2),l*S(t*5+i),9,9)

Feb 28 2017 7:36 PM UTC

}// 136/140

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u/5Mixer

Woah this is really cool. Sometimes it appears to be going in the reverse direction, because your eyes have no way of knowing, dope!

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jaustin

function u(t) {

for(X=1;X++<100;){for(Y=1;Y++<100;){x.fillRect(X*10,Y*10,10,10),x.fillStyle=R(120+120*C(10*t+X/50),120-120*C(9*t+Y/40),C(t))}}

Feb 28 2017 7:07 PM UTC

}// 126/140

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u/iverjo

Plasma! :D

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CynderR

function u(t) {

c.width^=0;for(i=2;i<2e3;i+=2)s=3/(3.1-(t+i/90)%3),x.beginPath(),j=i*16+S(i*4+t+S(t)),x.lineWidth=s*s,x.arc(960,540,s*49,j,j+.1),x.stroke()

Feb 28 2017 6:41 PM UTC

}// 139/140

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SpecialAgent

remix of d/1582 by u/sawaxon

function u(t) {

c.width=1920;x.font='9em a';
for(i=0;i<300;i++)
x.fillRect(i*5,S(i*5+t*i/200)*400+600,30,30),
x.fillText(':',i*5,S(i*5+t*i/200)*400+600);

Feb 28 2017 6:17 PM UTC

}// 137/140

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FireFly

function u(t) {

if (!t) x.translate(X=960, 540)
x.fillStyle = 'hsl('+t*20+',90%,50%)'
x.fillRect(0, 0, X/t, X/t)
x.strokeRect(0, 0, X/t, X/t)
x.rotate(16/t)

Feb 28 2017 5:40 PM UTC

}// 140/140

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Rainbow flower

u/SpecialAgent

so pretty. good use of translation.

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SpecialAgent

function u(t) {

π=Math.PI;h=540;q=S(t)
x.beginPath()
x.arc(960,h,q*q*h,1*π,3*π)
x.stroke()

Feb 28 2017 5:13 PM UTC

}// 74/140

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u/iverjo

Some interesting moirè patterns there
u/donbright

resembles 'circles and squares' fractal a little bit

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FireFly

function u(t) {

x.strokeStyle='hsl('+t*8+',90%,50%)'
x.beginPath()
for(i=24;i;x[i-24?'lineTo':'moveTo'](960+--i*20*C(U=i/4+t/4),540+i*20*S(U)));
x.stroke()

Feb 28 2017 4:37 PM UTC

}// 139/140

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u/donbright

cool hsl

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Niklas

remix of d/1511 by u/Niklas

function u(t) {

for(c.width|=0,q=80,r=.0785,i=q;i--;)for(a=i*r+t,k=12*q+C(a)*q*3,l=7*q+S(a)*C(a)*q*3,j=q;j--;)b=j*r,x.fillRect(k+C(b)*q*C(a),l+S(b)*q,3,3);

Feb 28 2017 4:17 PM UTC

}// 139/140

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SpecialAgent

function u(t) {

q=960;r=q/2;c.width^=0;x.font='9em a';for(i=50;i--;)x.arc(q,r,r,t,i),x.stroke(),x.fillText(String.fromCodePoint(i<<9),q+S(t+i)*q,r+C(t)*5*i)

Feb 28 2017 2:19 PM UTC

}// 140/140

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u/donbright

interesting

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bligglenuber

function u(t) {

c.width=198;a=6+C(t/9)
for(i=-99;i<99;i+=a)for(j=-56;j<56;j+=a)k=i*j,f=k*k*(1+C(t)),x.fillStyle=R(f,f/9),x.fillRect(99+i,56+j,a*S(k),a*C(k))

Feb 28 2017 2:00 PM UTC

}// 140/140

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I prefer this with a slower cycle by having t/99 instead of 9, but I couldn't find another place to drop a character

u/iverjo

You could move f= inside R, like this: c.width=198;a=6+C(t/9) for(i=-99;i<99;i+=a)for(j=-56;j<56;j+=a)k=i*j,x.fillStyle=R(f=k*k*(1+C(t)),f/9),x.fillRect(99+i,56+j,a*S(k),a*C(k))
u/bligglenuber

Ah, good shout, thanks

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