Dweets awesomed by u/marsch8

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: #Food

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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 UTC

}// 136/140

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u/5Mixer

Woa trip. I love the patterns it makes.

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Tosmatobeef

remix of d/1525 by u/lionleaf

function u(t) {

c.width=2e3;v='Thanks for making Dwitter!';for(i=v.length;i--;)x.font=100+'px Arial',x.fillText(v[i],i*81,540+S(t*10+i)*10)

Feb 28 2017 6:26 AM UTC

}// 123/140

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u/lionleaf

You're welcome! Fun to see activity here :)
u/sigveseb

:D

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bligglenuber

function u(t) {

w=30;h=w/1.8;c.width=w*2
a=(1+C(t*12))/2.4;x.arc(w,h,w/3,a,-a);x.lineTo(w,h);x.fill()
for(i=0;i>-5;i--)x.fillText('●',5*h+(i*h-t*2)%2*w,h+2)

Feb 27 2017 3:02 PM UTC

}// 140/140

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For those who are wondering h is meant to just represent half the height of the screen. I just wound up using it in inappropriate places because it was roughly the right number for what I needed

Show more comments…
u/iverjo

Related dweets: https://www.dwitter.net/d/312 and https://www.dwitter.net/d/391
u/vonzo

haha _haha_ __haha__ haha
u/bligglenuber

Bah, and there I was thinking I'd got there first. I get crazy lag when trying to look back due to the infinite loading, so I've been unable to see what people have done already
u/donbright

lol
u/iverjo

Yeah, good point ^^
u/iverjo

#pacman

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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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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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khalkeus

function u(t) {

c.width^=0;for(j=0;j<10;j++)x.fillRect(960+C(t*j)*S(t)*500,C(j*t)*S(t*j)*250+540,9,9);

Feb 26 2017 10:02 PM UTC

}// 86/140

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khalkeus

function u(t) {

w=960;h=500;c.width=w*2;for(var i=-9;i<w*2;i+=20){v=h*S(t+i);x.fillStyle=R(255,v/2);x.fillRect(C(i)*w/9+w,h-v+v/2,v,9);}

Feb 26 2017 8:18 PM UTC

}// 120/140

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u/donbright

ooh very 80s

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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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HeyJD

function u(t) {

c.width^=0;r=480;for(θ=44/7;θ>0;θ-=.7/(C(t)+1))for(φ=p=11/7;φ>-p;φ-=1/r)x.lineTo((C(t)*S(φ)-S(t)*C(φ)*S(θ))*r+r*2,C(φ)*C(θ)*r+r);x.stroke()

Feb 26 2017 5:46 PM UTC

}// 140/140

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You can change the ".7" number to be a lower number like .2 to increase the number of segments in the sphere.

u/donbright

brilliant

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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 UTC

}// 135/140

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snowflakes

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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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robot0001

remix of d/1393 by u/Jenky

function u(t) {

n=120;r=5;for(i=t;i<t+r+r;i+=r/99){z=i*i+t;a=-C(i);b=-T(i);x.fillStyle=R(C(z)*n*255,C(r),C(z)*n);x.fillRect(960-T(t+i)*a*n,b*n*4,9,i)}

Feb 26 2017 3:15 PM UTC

}// 135/140

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