Dweets awesomed by u/cucumberOwl

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Opposites

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joeytwiddle

function u(t) {

r=Math.random;p=(X,Y,S,D,k)=>D&&(x.globalAlpha=.01,x.fillRect(X,Y,S,S),k=_=>p(X+2*S*r()-S,Y+S*r()/2,S*.8,D-1),k(),k());t||p(900,0,500,18)

May 15 2017 8:38 AM UTC

}// 137/140

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Random cloud generator

u/joeytwiddle

You can click on the code and hit Space to see more clouds
u/jick

I would love to see a breakdown of how this works.
u/joeytwiddle

It's a fractal using recursion. p draws a square with the given parameters. Then it calls p again twice to draw slightly smaller squares, offset from the parent.
u/joeytwiddle

Like this but more random (and with 2 children instead of ~7): http://neuralyte.org/~joey/hwimirror/hwi.ath…

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sfz

function u(t) {

w=213
h=120
d=t?~~(t*60)%9?d:new Date%4:0
x.x=x.x||w
x.y=x.y||h
x.x+=d<2?d<1?1:-1:0
x.y+=d>1?d>2?1:-1:0
x.fillRect(x.x%w*9,x.y%h*9,9,9)

Apr 18 2017 1:27 AM UTC

}// 135/140

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sfz

remix of d/2376 by u/magna

function u(t) {

for(i=0;i<(半=500);i++)x.fillStyle=R(0,i?w:0),x.fillRect(i?2*半+i*C(T=t-(Math.random()<3e-4)*.2):x.globalAlpha=.1,i?半+i*S(T):0,z=i?8:w=2e3,z)

Apr 1 2017 4:12 PM UTC

}// 139/140

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Green, but the blips are harder to see

u/sfz

Increasing alpha helps see them, but makes the line sweep less cool
u/magna

They are ninjas. Harder to see.
u/donbright

lol nice

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sfz

remix of d/2351 by u/nonce

function u(t) {

c.width=w=512
with(x)fillRect(0,h=240,w,w),clearRect(t*999%w-31,h+7,93,9),font='9em a',fillText(['🚗','🚃','🚙'][~~(t/2)%3],w-(t*w&1023),h)

Mar 31 2017 4:25 AM UTC

}// 136/140

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Renaud___

function u(t) {

l=c.width+=i=0;h=400;for(;++i<200;)for(j=a=(t+C(i))%2;j++<50;)x.fillRect(l*C(i*i)+~~a*(w=a*h-h)*C(j),(~~a?h:a*h)*(C(i)*C(i)+2)+w*S(j)/4,3,3)

Feb 27 2017 12:09 PM UTC

}// 140/140

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Show more comments…
u/HeyJD

This looks amazing. Great job.
u/Renaud___

Thanks :)
u/khalkeus

this is super neat
u/iverjo

Wow!
u/lionleaf

Brilliant!
u/tbroadley

Sweet!
u/donbright

OMG OMG OMG OMG
u/ninerdelta

mind blown
u/sfz

(((does we're not worth bow)))
u/Kalanchoe

That's so beautiful!
u/spbyrne

Incredible
u/Renaud___

wow ... thanks again for all the nice reviews :)
u/punkhaa

mice
u/punkhaa

*nice
u/gormisdomai

I joined this site for this kind of thing
u/lionleaf

On mobile you can tap at different locations for different colors
u/lionleaf

Haha, oops, that comment was for another dweet. This still remains one of my favorites!!
u/sigveseb

golfed to 137: for(l=c.width+=i=0,h=400;++i<200;)for(j=a=(t+C(i))%2;j++<50;)x.fillRect(l*C(i*i)+~~a*(w=a*h-h)*C(j),(~~a?h:a*h)*(C(i)**2+2)+w*S(j)/4,3,3)
u/FireFly

Eternal rains will come… I really like this one, very pretty!
u/zhanglongdream

啊啊啊
u/leonarven

It was really nice to solve the secret of this code! Such simple, but such brilliant! Good job!
u/sb

My favorite
u/arowberry

I love it. Reminds me of my Seattle days.
u/21medals

What does ~~ do? Like in (~~a?h:a*h)
u/Renaud___

It work as a math.floor. actually there is a difference but i dont remember how exactly
u/Renaud___

Dunno what changed in Chrome recently, but now this animation is very very slow :(
u/hollo47

#rain
u/noonat

~ is a bitwise not. It flips all the bits in the number to the opposite. Flipping again (~~) puts the bits back to what they were. It works does something similar to floor because it truncates floats to 32-bit integers as part of the operation. (But unlike floor, ~~-2.1 is -2 instead of -3.)
u/rbong

I did a detailed analysis of this effect in a medium post: https://medium.com/@r.l.bongers/visual-effec…
u/vain

cool raindrop fx

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SpecialAgent

function u(t) {

w=960,h=540,a=w+S(t*t)*99,b=h+C(t*t)*99
x.fillStyle=R(S(t)*255,0,128+C(t)*128)
x.fillRect(a,b,9,9)
x.drawImage(c,S(t)-2,C(t)-2,1924,1084)

Feb 26 2017 7:37 PM UTC

}// 137/140

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give it a minute to warm up :)

u/donbright

wow.. smooth and mysterious

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khalkeus

function u(t) {

w=960;h=500;z=t%(w*2)*999;for(var i=0;i<h;i++){x.fillStyle=R(S(z)*255,S(z*9)*255,C(z*9)*255);x.fillRect(C(z)*w*2,S(i*z)*h*5,9,9)}

Feb 26 2017 7:08 PM UTC

}// 129/140

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u/iverjo

+1 for the novelty

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cucumberOwl

function u(t) {

a=255;f=Math.random;
x.fillRect(960+S(t)*t*20*f(), 540+C(t)*t*20*f(), 5*t, 5*t);x.fillStyle=R(f()*a, f()*a, f()*a)

Feb 26 2017 7:02 PM UTC

}// 114/140

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tbroadley

remix of d/1429 by u/tbroadley

function u(t) {

w=c.width=99;h=c.height=56;for(i=0;i++<h;)for(j=0;j++<w;)f=(k,d)=>99*S(t+k/d)+155,x.fillStyle=R(f(w,i),f(h,j),f(j,i)),x.fillRect(j,i,1,1)

Feb 26 2017 6:52 PM UTC

}// 137/140

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Show more comments…
u/marsch8

fdjak
u/marsch8

whoooops! Didn't mean to write that. Cool dweet, though!
u/KHymatim

fdjak
u/magna

fdjak
u/unframework

fdjak
u/tbroadley

https://www.dwitter.net/d/1429
u/joeytwiddle

#fdjak #colors

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khalkeus

function u(t) {

w=960;h=500;a=Math.random;v=a()*999;x.globalAlpha=a();x.fillStyle=R(v*a(),99,99);x.fillRect(a()*w*2-33,a()*h*2-33,a()*h/2,a()*h)

Feb 26 2017 6:45 PM UTC

}// 128/140

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u/magna

Nice colour scheme!

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