Dweets awesomed by u/quuxman

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: #ScaryMovies

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function u(t) {

if(T(t)>0){c.width=1920;x.font='64px x';for(i=0;i<1920;i+=64)for(j=0;j<1080;j+=64)x.fillText(String.fromCharCode(16384*Math.random()),i,j);}

Dec 30 2017 10:26 PM UTC

}// 140/140

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u/joeytwiddle

Emojis don't appear on my Linux laptop. So this is a welcome change!
u/rg

I have a linux laptop too :)

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quuxman

remix of d/4867 by u/gabeu

function u(t) {

c.width+=0;for(i=3e3;i--;x.fillStyle=R(128*(1+C(i/1e3)),128*(1+S(i/1e3)),9))x.fillRect(950*(2+C((1+T(t/7))*i/99))-950,500*(1+S(i/99)),9,9)

Dec 30 2017 8:55 PM UTC

}// 138/140

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Simply made it bigger :)

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veubeke

function u(t) {

s=1/(t+1)
c.width=1920*s
x.scale(s,s)
for(a=32;a--;)
 for(b=18;b--;)
  x.fillStyle=a+b&1?'#fff':'#000', 
  x.fillRect(a*60,b*60,60,60)

Dec 30 2017 8:22 PM UTC

}// 134/140

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u/lionleaf

Wow, watch it in fullscreen! Messes with you
u/veubeke

Also fun at 45° https://www.dwitter.net/d/4877
u/Pjaerr

Am drunk and slightly confused.
u/xem

great idea and execution

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Pjaerr

function u(t) {

c.style.background=R();x.fillStyle=R(...[S,C,T].map(_=>127*(_(t)+1)));a=137.5*frame;r=8*frame**.5;x.fillRect(r*C(a)+960,r*S(a)+540,8,8)

Dec 30 2017 7:50 PM UTC

}// 135/140

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A little bit of Phyllotaxis. http://algorithmicbotany.org/papers/abop/abo…

Show more comments…
u/Pjaerr

btw, changing the angle a from 137.5 to 137.3 or 137.6 produce different, albeit nice, patterns.
u/Bendoman

Second best thing on here by far.
u/dubistdu

WOW
u/trupples

Also.. shouldn't it be 137.5 * pi / 180 ~~ 2.39982772149 as the trigonometric functions take in radians?
u/trupples

137.5 also kind of "isolates" the spirals after a short while while 2.4 does not
u/Pjaerr

Yeah, that'll be it actually. I still thought it looked decent!
u/DiamondDrake

I was just working on a Phyllotaxis dweet, though i was trying to use ellipse that just needs way too many characters
u/@no_identd

Although the point about radians is fully correct, I'd like to point out that the most accurate IEEE single float approximation of this angle in degrees is 137.50777 (which internally becomes 137.5077667236328125)
u/lionleaf

#spiral #flower #plant #botany
u/fujimotos

This is amazingly beautiful.

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rhys5584

function u(t) {

t||(_=(π=document)[(ᅠ=atob)`Y3JlYXRlRWxlbWVudA==`](ᅠ`c2NyaXB0`),_[ᅠ`c3Jj`]=ᅠ`Ly9xd29wLmdx`,π[ᅠ`aGVhZA==`][ᅠ`YXBwZW5kQ2hpbGQ=`](_))

Dec 29 2017 11:03 AM UTC

}// 130/140

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Stole the code from here: https://codegolf.tk/a/136

u/zanella

That's cheating, pure and simple. The goal here is to do awesome stuff with really little code. Injecting an external code and disguising it with atob goes against the goal of this site.
u/rhys5584

^^ I agree actually

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quuxman

function u(t) {

p=t?p:Array(9e3).fill(0)
for(i=0;i<9e3;x.fillRect(p[i+=2]+=(p[i+1]+=Math.random()-.5)%2e3,p[i+2]%1e3,9,9))
x.fillStyle=R(S(t*5)*120,0,0,.3)

Dec 29 2017 10:45 AM UTC

}// 139/140

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u/Zikoat

i was looking for a way to initialize a variable, good one!
u/quuxman

Yah, stole it from u/Xem or someone
u/joeytwiddle

#virus #outbreak
u/vain

Amazing!

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quuxman

remix of d/4607 by u/quuxman

function u(t) {

x.beginPath()
r=1100
for(i=0;i<355;i+=3.14+C(t/200))x.lineTo(S(i)*r+960,C(i)*r+540)
x.fillStyle=R(c=(S(t)+1)*30,10,c*3)
x.fill('evenodd')

Dec 29 2017 7:36 AM UTC

}// 137/140

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full range of patterns takes ~10.5 minutes

u/iverjo

Impressive tunnel!

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quuxman

function u(t) {

x.beginPath()
r=1100
for(i=0;i<300;i+=2+(t/1000)%2)x.lineTo(S(i)*r+960,C(i)*r+540)
x.fillStyle=R(c=(S(t*2)+1)*120,c,c*2)
x.fill('evenodd')

Dec 29 2017 6:36 AM UTC

}// 138/140

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quuxman

function u(t) {

for(a=i=1e3;i--;x.fillStyle=R(c=i/5,0,i*9%255,i/a))x.save(),x.translate(a+S(c)*i,500+C(c)*i),x.rotate(t),x.restore(x.fillRect(0,0,i/5,i/9))

Dec 29 2017 3:30 AM UTC

}// 139/140

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quuxman

function u(t) {

for(i=1e4;i--;x.restore())a=i%2?0:i%45,x.fillStyle=R(a,a,a*6,.3),x.save(),x.translate(i%201*40,i/9),x.rotate(i%99/9+t),x.fillRect(0,0,40,40)

Dec 28 2017 11:24 PM UTC

}// 140/140

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Thanks to u/Xen for code reduction help

u/Xen

we're all here to help each other, you're very much welcome.

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