Dweets awesomed by u/sfz

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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JonasWechsler

function u(t) {

l=~~(255*t);for(i=-1;++i<192*108;){j=(i%192);k=~~(i/192);x.fillRect(j*10,k*10,10,10);j+=l;k+=l;x.fillStyle=R(j%255,k%255,j*k*192%255,1);}

Feb 27 2017 10:13 PM UTC

}// 137/140

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Niklas

remix of d/1344 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)*S(t)*q*2,j=q;j--;)b=j*r,x.fillRect(k+C(b)*q*C(a),l+S(b)*q,3,3)

Feb 27 2017 9:47 PM UTC

}// 138/140

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u/donbright

bravo!
u/katkip

is this #torus #d3

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mfk

function u(t) {

c.width=1920;for(i=1;i++<10;){z=S(i*t);y=C(i*t);x.arc(960+100*z,540+100*y,(20*t+S(t)),0,2*Math.PI);x.stroke()}

Feb 27 2017 9:13 PM UTC

}// 110/140

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u/donbright

clever!

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Kebabman13

function u(t) {

r=Math.random
c.w
t?o.push({X:1000+10*r(),Y:-300,ẋ:12,ẏ:9}):o=[]
o.map(a=>(x.fillRect(a.X+=a.ẋ+=r()-0.9+S(t)/1,a.Y+=a.ẏ+=r(),55,0.1)))

Feb 27 2017 9:05 PM UTC

}// 135/140

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innovati

function u(t) {

for(i=1500;i--;){
  x.fillStyle='hsl('+i*10+',75%,50%)';
  x.fillRect(i/t,i*t,30,30);
}

Feb 27 2017 8:11 PM UTC

}// 87/140

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u/infin80

That's a helluva trip!
u/Xen

Has anyone really been far as decided to use even go want to do look more like?

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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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codegourmet

function u(t) {

c.width^=0;r=Math.random
t?s.push([0,r()*999,r()]):s=[]
s.map(o=>(a=255*(1-o[2]),x.fillStyle=R(a,a,a),x.fillRect(o[0]+=30*o[2],o[1],15,15)))

Feb 27 2017 2:30 PM UTC

}// 140/140

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u/sfz

oh so sweet!

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spbyrne

function u(t) {

l=24;if(t==0)s=x.createImageData(l,l);for(i=0;i<l*l;i++){s.data[i*4+3]=Math.random()*3e4;x.putImageData(s,(i/7.16)*l,(Math.random()*45)*l)}

Feb 27 2017 2:10 PM UTC

}// 139/140

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u/donbright

night blizzard!
u/Chapsie

This is comforting in an odd way, nice!

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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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micksam7

remix of d/1474 by u/micksam7

function u(t) {

f=2e3;x.fillStyle=R(f,f,f,.2);x.fillRect(0,0,f,f);for(i=f;i--;)a=T(i+t/9)*C(i),x.fillStyle=R(i,i/5),x.fillRect(a*900+960,C(i*t/f)*1080,9,9)

Feb 27 2017 6:59 AM UTC

}// 139/140

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