Dweets awesomed by u/hamptonio

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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scottglz

remix of d/1516 by u/scottglz

function u(t) {

w=c.width=255;h=144;d=c.d=t&&c.d||x.getImageData(0,0,w,h);for(i=0;i<w;i++)d.data[~~(i*t*t)]=i;x.putImageData(d,0,0)

Feb 27 2017 11:57 PM UTC

}// 115/140

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FireFly

function u(t) {

f = t*60|0
X =  f%120, Y = f/120|0
x.fillStyle = "]!{$${!]".charCodeAt(X%16) + 59 >> Y%12& 1? '#345' : '#DEF'
x.fillRect(X*16, Y*16, 16, 16)

Feb 27 2017 6:20 PM UTC

}// 140/140

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u/sigveseb

cool!
u/sfz

wtf is going on here?!
u/FireFly

The string embeds a tiny bitmap which is simply repeated :)
u/5Mixer

This is an awesome idea! I wonder what else you could do with using strings to encode more complex(?) data. Interesting.
u/PiggyClone205

When I read complex, I immediately thought of maybe importing other javascript and cheating a bit.
u/katkip

#invaders

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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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hamptonio

function u(t) {

s=t*9%32|0;for(i=0;i<6.3;i+=.001){k=16-s;q=s%2*255;x.fillStyle=R(q,0,s*8);x.fillRect(960+29*(k*C(i)+C(k*i)-k),540+29*(k*S(i)-S(k*i)),1,1);}

Feb 27 2017 5:26 AM UTC

}// 139/140

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Hypocycloids and epicycloids.

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magna

function u(t) {

(function u(t){
c.width=1920;x.font='38px Menlo,Consolas';
`(${u})(t)`.split('\n').forEach((s,i)=>x.fillText(s,0,++i*45+(C(t)+1)*666))
})(t)

Feb 27 2017 4:58 AM UTC

}// 140/140

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Quine

Show more comments…
u/Kalanchoe

Haha, clever!
u/vonzo

wut?
u/sfz

<3
u/jczimm

nice!
u/highfestiva

wtf! :)
u/magna

#quine

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gabrielsroka

remix of d/1290 by u/gabrielsroka

function u(t) {

onclick=e=>c.width^=0
r=Math.random
i=t&&i<250?i+6:(X=r()*1920,Y=r()*1080,0)
with(x)beginPath(),fillStyle=R(i),arc(X,Y,255-i,0,6.28),fill()

Feb 26 2017 11:13 PM UTC

}// 139/140

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Click to clear

u/gabrielsroka

#interactive

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hamptonio

remix of d/123 by u/icecuber

function u(t) {

t?i++:i=0;for(j=1e3;j--;){a=b=0;k=256;for(;k--&&a*a+b*b<4;)c=a*a-b*b+i/1e4,b=2*a*b+j/1e4+.6,a=c;x.fillRect(i,j,1,S(k))}

Feb 26 2017 9:48 PM UTC

}// 119/140

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u/iverjo

Worth the wait
u/hamptonio

Yeah its pretty damn slow.
u/KHymatim

Mmmmm
u/iverjo

#fractal

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hamptonio

remix of d/123 by u/icecuber

function u(t) {

i=frame;s=99;for(j=1e3;j--;){a=b=0;for(k=s;k--&&a*a<4;)c=a*a-b*b+i/1e4,b=2*a*b+j/1e4+.6,a=c;x.fillStyle=R(k,s*(1+S(k)));x.fillRect(i,j,1,1)}

Feb 26 2017 9:44 PM UTC

}// 140/140

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u/donbright

never get tired of these! nice.
u/hamptonio

The colors can definitely be improved, I'm not real happy with it.

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PhocaZH

function u(t) {

e=(t%4-2);g=Math.abs(e);x.fillStyle='F00';y=400+-Math.sqrt(1-Math.pow(g-1,2))*150;a=-Math.acos(1-g);x.fillRect(900+e*150,y,9,870+a*150-y);

Feb 26 2017 9:42 PM UTC

}// 138/140

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u/lionleaf

#heart

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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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