Dweets awesomed by u/serj

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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21medals

function u(t) {

for(i=99;i--;x.fillRect(o=-i*9,o,s=i*18,s))x.resetTransform(),x.translate(960,a=540),x.rotate(i/2*t/5),x.fillStyle=R(S(i)*a,C(i)*a,S(t+i)*a)

Feb 4 2018 10:56 PM UTC

}// 140/140

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u/magna

Awesome!
u/joeytwiddle

That is one powerful optical illusion. Looks like it's spinning!
u/iverjo

LOL Joey :)
u/DeathBoy

I CAN SEE THROUGH TIME
u/joeytwiddle

#kaleidoscope #spiral #colorshock

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DirtyDan

remix of d/6645 by u/DirtyDan

function u(t) {

for(i=1;i<360;i++)x.fillStyle=`hsl(${i},99%,50%)`,R=532*S(t+i/180),x.fillRect(960+R*C(t+i)-4,540+R*S(t+i)-4,8,8)

Feb 4 2018 7:23 AM UTC

}// 112/140

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serj

remix of d/6639 by u/21medals

function u(t) {

for(c.width|=i=111;i--;x.ellipse(960,r=540,S(t+S(t/9*i))*r/2+r/2,r,.2618*i,0,6.283),x.fill())x.beginPath(),x.globalCompositeOperation="xor"

Feb 2 2018 3:48 PM UTC

}// 139/140

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DirtyDan

remix of d/6644 by u/DirtyDan

function u(t) {

c.width+=0
x.globalCompositeOperation='xor';
for(i=0;i<300;i++)R=515*S(t+i/300*T(C(t))),x.fillRect(960+R*C(t+i)-25,540+R*S(t+i)-25,50,50)

Feb 1 2018 8:25 PM UTC

}// 137/140

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DirtyDan

function u(t) {

c.width+=0
x.globalCompositeOperation='xor';
for(i=0;i<300;i++)R=515*S(t+i/3000*6),x.fillRect(960+R*C(t+i)-25,540+R*S(t+i)-25,50,50)

Feb 1 2018 8:21 PM UTC

}// 132/140

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u/Purpzie

Managed to shorten this by 4 characters: for(c.width|=i=0,x.globalCompositeOperation='xor';i<300;i++)R=515*S(t+i/3e3*6),x.fillRect(960+R*C(t+i)-25,540+R*S(t+i)-25,50,50)

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DirtyDan

function u(t) {

x.globalCompositeOperation='xor';
x.fillRect(960+910*C(t)-25,540+515*S(t)*C(t)-25,50,50)

Feb 1 2018 3:59 AM UTC

}// 88/140

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BackendForth

function u(t) {

c.width=w=1920
if(!t){for(a=Array(i=w);i--;)a[i]=i**9%999}for(i=w;i--;)x.fillRect(i,0,1,a[i]),a[i]>a[i+1]?a.splice(i,2,a[i+1],a[i]):0

Jan 18 2018 6:09 PM UTC

}// 133/140

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u/iverjo

Bubble sort
u/Lazy1337

#sort

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aemkei

remix of d/6101 by u/aemkei

function u(t) {

c.width|=8
x.translate(960,540)
x.rotate(t/9)
x.font="200px a"
for(i=8;i--;x.fillText(String.fromCharCode(1536+t),6,C(t)*50))
x.rotate(4/5)

Jan 16 2018 9:20 PM UTC

}// 139/140

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u/Xen

nice find!

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DirtyDan

remix of d/5684 by u/DirtyDan

function u(t) {

p=Math.PI*2
a=960
b=535
c.width=a*2
for(i=0;i<a;i+=10)for(j=0;j<b;j+=10)
x.fillRect(a+a/7*S((y=i/a*p)+S(t))*(z=j/b*p),b+b/2*S(z)*C(y+t),9,9)

Jan 7 2018 3:47 AM UTC

}// 140/140

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