Dweets awesomed by u/lionleaf

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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Niklas

remix of d/1519 by u/Niklas

function u(t) {

for(c.width|=0,m=960,q=120,i=q;i--;)for(x.fillStyle=R(1,i,1),s=S(.026*i)*q*3,j=q;j--;)b=6.28*j/q+t,x.fillRect(m+C(b)*s,m/3.2+4*i+S(b)*s,3,3)

Feb 27 2017 11:28 PM UTC

}// 140/140

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sfz

remix of d/1479 by u/sfz

function u(t) {

c.width=w=2e3
d=new Date
t?!(d&9)&&o.push([d%w,0,0,d%9]):o=[]
o.map(a=>(x.font=a[3]+'em ø',x.fillText('❄',a[0],a[1]+=a[2]+=a[3]*a[3]/w)))

Feb 27 2017 11:03 PM UTC

}// 137/140

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Snowflakes with gravity acceleration and parallax

u/sfz

err, depth that is, small ones fall slower as if they're further away :P
u/joeytwiddle

#snow I think it's fair to call that parallax, just vertical

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spbyrne

function u(t) {

w=c.width=1e3;f=50;for(s=1;s<f;s++){n=t/4%1*f*s;for(i=0;i<f*2;i++)x.quadraticCurveTo(i*f-25-n,s*f*1.1,i*f-n,s*f);x.stroke();x.beginPath()}

Feb 27 2017 9:13 PM UTC

}// 138/140

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u/katkip

#waves

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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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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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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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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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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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sigveseb

remix of d/1443 by u/sigveseb

function u(t) {

with(x)(F=a=>fillStyle='#'+a)('e22'),x.Q=fillRect,Q(0,0,W=2e3,W),F('fff'),Q(0,390,W,300),Q(500,0,300,W),F(228),Q(0,465,W,150),Q(575,0,150,W)

Feb 26 2017 8:58 PM UTC

}// 140/140

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u/highfestiva

Tiiiny, just like the average Norwegian intellect. ;-)
u/M1T0

got em
u/iverjo

#flag

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gabrielsroka

function u(t) {

d=!t?2:d
c.width=w=1920
x.beginPath()
for(Y=d;Y<1080;Y*=1.3)x.moveTo(0,Y),x.lineTo(w,Y)
x.stroke()
d=d>=3?2:d+.1

Feb 26 2017 8:50 PM UTC

}// 112/140

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