Dweets awesomed by u/kchplr

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: #Opposites

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kchplr

remix of d/1416 by u/kchplr

function u(t) {

for(i=1296;i--&&t<2;Y=i/48|0,d=.2+((X-24)**2+(Y-13)**2)/300,s=(200*S(t*d)*d)%40,x.fillRect(X*40-S(Y*X+t)*s,Y*40+S(X+Y-t)*s,s/8,s/7))X=i%48

Feb 28 2017 12:24 PM UTC

}// 138/140

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I would be lying if I said this is what I had in mind

u/Flexi23

But no-one could look into your mind and compare. wait. no.

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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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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

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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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 UTC

}// 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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kchplr

function u(t) {

for(c.width^=0,z=S(t)**9,n=500;n--;w=z*n*C(t+n*z/20)/1e6,x.setTransform(.5+w*1e3,n*w,n*w,.5,940,530),x.fillRect(-250,n-250,500,5));

Feb 26 2017 1:04 PM UTC

}// 132/140

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kchplr

function u(t) {

for(c.width^=0,x.fillRect(0,1e3,2e3,9),n=13;n--;z=S(t+n/5)**2,x.setTransform(100,0,0,10-z**9*3,150+n*125,622+300*z),x.fillRect(-z,0,1,10));

Feb 26 2017 12:06 PM UTC

}// 140/140

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kchplr

function u(t) {

for(n=1e3;n--;f=t*12e4+n*4,X=f%1920,Y=f/1920|0,G=C(5+Y*.008+C((X-960)/960))*40+200,x.fillStyle=R(G,G,G*.9),x.fillRect(X,Y*4,4,4));

Feb 26 2017 10:45 AM UTC

}// 130/140

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kchplr

function u(t) {

for(c.width^=0,i=3e3;i--;r=i/30,e=S(t*.7)*.02,w=1e3,z=100+S(i*2+r*e)*600,y=S(C(i+t)),Y=y,x.fillRect(w+w*y,r*2.5+400+z*y*.5,8*Y,7*Y));

Feb 26 2017 9:40 AM UTC

}// 133/140

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Spent some time trying to compress it, but forgot to remove the Y=y. Should be 129 bytes instead of 133.

u/sigveseb

if you do z=99.. instead of z=100.. you can get an extra byte!
u/kchplr

aah, indeed thanks!
u/kchplr

Just figured out the last statement in the for loop can also be placed in the loop body to save two more bytes. I'm new to this codegolfing thing...
u/kchplr

Actually, the first statement, not the last..

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