Dweets awesomed by u/sfacci

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

} // 112/140

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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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sawaxon

remix of d/1579 by u/sawaxon

function u(t) {

c.width=1920;x.font='120px Arial';
for(i=0;i<190;i++)
x.fillText('.',i*10,S(t)*600+S(i*2+t*2)*200+400);

Feb 28, 2017 4:22 PM

}// 103/140

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Niklas

remix of d/1511 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)*C(a)*q*3,j=q;j--;)b=j*r,x.fillRect(k+C(b)*q*C(a),l+S(b)*q,3,3);

Feb 28, 2017 4:17 PM

}// 139/140

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pstefanlarsson

function u(t) {

c.width=1920;
for(i=0;i<100;i++){
a = i % 10;
b = Math.floor(i / 10);
x.fillRect(600+a*80, 140 + b*80, 60*C((a+b+1)*t), 60*S((a-b)*t))
}

Feb 28, 2017 7:06 AM

}// 136/140

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u/5Mixer

Woa trip. I love the patterns it makes.

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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

}// 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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jackal807

function u(t) {

k=255,a=Math,y=a.random,z=(h)=>y()*h+1,r=(z(k*9)),v=(z(k*5));x.beginPath();x.arc(r,v,z(k),0,2*a.PI);x.fillStyle=R(z(k),z(k),z(k));x.fill();

Feb 27, 2017 8:29 AM

}// 139/140

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u/iverjo

This could serve as screensaver

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kchplr

function u(t) {

for(c.width^=0,i=1296;i--;X=i%48,Y=i/48|0,d=1-((X-24)*(X-24)+(Y-13)*(Y-13))/300,s=(200*S(t*C(d))*d*d)%45,x.fillRect(X*40-s/2,Y*40-s/2,s,s));

Feb 26, 2017 3:48 PM

}// 140/140

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u/sigveseb

I like this!
u/Kalanchoe

Somewhat reminds me of Halite: halite.io
u/iverjo

Nice technique!
u/KHymatim

Mmmmm

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

r=Math.random
c.width^=0
t?o.push({X:1920*r(),Y:0,ẋ:0,ẏ:0}):o=[]
o.map(a=>(x.fillRect(a.X+=a.ẋ+=r()-0.5+S(t)/15,a.Y+=a.ẏ+=r(),15,15)))

Feb 26, 2017 3:27 PM

}// 135/140

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snowflakes

Show more comments…
u/Kalanchoe

oh, this is pretty!
u/Kalanchoe

Try setting initial y to y:-15 :)
u/iverjo

Speaking of snowflakes: https://www.dwitter.net/d/338
u/donbright

thanks. iverjo that is super cool! i wish i could figure out how to combine that with this.
u/sfz

Did it, but at 150 chars, will share remix if I can get it down to limit.
u/sfz

Eh, not the same subtlety, but this is what I've got https://www.dwitter.net/d/1479
u/sfz

New version where larger snowflaskes fall faster than smaller ones, but had to remove the random wind. https://www.dwitter.net/d/1520
u/donbright

nice
u/sfacci

confetti!
u/donbright

#particles

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tbroadley

function u(t) {

c.width^=0;for(i=3;i++<11;)a=i*S(t)/4,x.beginPath(),x.arc(960,540,40*i,Math.min(t+a,t+3*a),Math.max(t+a,t+3*a)),x.lineWidth=i*i/5,x.stroke()

Feb 26, 2017 5:40 AM

}// 140/140

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u/sfz

sweet loader
u/Kalanchoe

mesmerizing!
u/Tosmatobeef

This is my favorite kind of loading animation
u/iverjo

#loading

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sfacci

remix of d/888 by u/jczimm

function u(t) {

c.width=1920;
for(i=0;i<300;i++)for(j=0;j<6;j++){
x.fillRect(
960+200*S(t+i/j),
540+200*T(j+i),
10,10)}

Feb 23, 2017 10:01 PM

}// 103/140

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u/donbright

very nice

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sfacci

function u(t) {

c.width=1920;
for(i=0;i<1920;i+=100){
x.fillStyle=R(255*i/1920,86,120)
x.fillRect(i, C(Math.random())*S(t)*540+540, 50, 150)
}

Feb 23, 2017 9:12 PM

}// 126/140

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