Dweets awesomed by u/RomanW

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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FireFly

function u(t) {

for(c.width|=0,i=3e3;Y=i-->>6;((X*(Y^X)*(1-C(t/4))/99&15).toString(D=30)>"082ac4e63b19f7d5"[Y%4*4+X%4])&&x.fillRect(X*D,Y*D,D,D))X=i&63

Mar 7 2017 11:21 PM UTC

}// 135/140

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Dithering as a stylistic effect

u/nick

Fucking tight!
u/joeytwiddle

#diither

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tomkh

function u(t) {

for(c.width=i=1920;i--;){for(h=63&i,v=i>>6,e=k=g=30;k--;)r=S(k-t)+1-h/g,d=C(3*k+t)+1-v/g,d=d*d+r*r,e=e>d?(s=k,d):e;x.fillRect(h*g,v*g,s,s)}

Mar 5 2017 7:47 PM UTC

}// 139/140

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u/sfz

What alchemy is this?
u/tomkh

just a brute-force Voronoi Diagram
u/donbright

WOWWWWW
u/magna

How in the ...
u/Xen

131bytes: for(c.width=i=1920;i--;x.fillRect(h*g,v*g,s,s))for(h=63&i,v=i>>6,k=e=g=30;k--;e=e>d?(s=k,d):e)d=C(3*k+t)+v/g,d=d*d+r*(r=S(k-t)+h/g)
u/Xen

131bytes: for(c.width=i=1920;i--;x.fillRect(h*g,v*g,s,s))for(h=63&i,v=i>>6,k=e=g=30;k--;e=e>d?(s=k,d):e)d=C(3*k+t)+v/g,d=d*d+r*(r=S(k-t)+h/g)

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sigveseb

function u(t) {

t*=5;for(c.width=s=X=64;X--;)for(Y=37;Y--;1-Q*Q-W*W>0&&x.fillRect(X,Y,1,1))for(j=40,Q=W=E=0;j--;Q=E)E=Q*Q-W*W-X/t/t+5/t,W=2*W*Q-Y/t/t+.66

Mar 2 2017 2:02 AM UTC

}// 137/140

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u/sfz

Nice Mandelbrorshach!
u/iverjo

That's pretty impressive
u/sigveseb

#fractal #zoom
u/katkip

Awesome
u/katkip

#mandelbrot

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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/1203 by u/vegolasse

function u(t) {

q=43;function a(r){x.arc(q+S(r/3)*400,q+S(r/2)*730,i,0,6.283);x.closePath()}c.width=q*q;for(i=0;i<q*q;i+=9){a(t);a(S(t))};x.fill("evenodd")

Feb 25 2017 1:10 AM UTC

}// 140/140

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seems like that evenodd method could do some other cool shit

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sigveseb

remix of d/271 by u/3bl3gamer

function u(t) {

W=c.width=255;for(i=9<<12;a=i&W,b=i>>8,n=b-45,m=a-99,i--;x.fillRect(a,b,A=1/(((t+a/n)%2)^b/n),A))n*=(B=(W*S(t*29+n/5)+m*m+n*n)/5e3)<1?C(B):1

Feb 24 2017 12:35 AM UTC

}// 140/140

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Based on some of 3b3lgamer's stuff (remix link got broken).

Show more comments…
u/donbright

dude you are the king,.. O M GOSH
u/Renaud___

Fantastic :S
u/lionleaf

Fixed the remix link for ya :)
u/nashcat

holy sh*t
u/Kalanchoe

H...how? This is so impressive.
u/magna

Needs more music.
u/xem

inhuman
u/donbright

still the one that blew my mind the most.
u/lionleaf

#wobble #wobbly #water #mirror #checkerboard #refraction #sphere
u/Xaotic

wtf
u/firegodjr

#raytracing #best
u/stiaje

#witchcraft
u/sigveseb

This one used to be fast, wonder why it is slow now?

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sigveseb

remix of d/302 by u/sigveseb

function u(t) {

(F=Z=>{for(x.fillStyle=R(W=1/Z*4e3,W/2,W/4),i=Z*Z*2;n=i%Z,m=i/Z|0,i--;n%2^m%2&&x.fillRect((n-t%2-1)*W,(S(t)+m-1)*W,W,W));Z&&F(Z-6)})(36)//rm

Feb 21 2017 11:18 PM UTC

}// 140/140

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u/dx4100

absolute insanity in two lines of code -- so awesome!
u/Daboo

I love it
u/lionleaf

All credit to u/sigveseb! dwitter.net/d/302
u/surasshu

fabulous!
u/alpha

Nice
u/soxface

incredible...
u/suresh

Awesome!
u/arowberry

really really cool!
u/highfestiva

This is far from your best work, why is it so liked?
u/iverjo

Because it got much exposure during a traffic peak on dwitter last year
u/iverjo

Besides, it's an awesome dweet :D
u/iverjo

https://www.youtube.com/watch?v=vFdDOcDLXt4
u/iverjo

#recursive
u/vain

Very cool checkerboard parallax fx
u/fentbiggesthater

decent

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iverjo

function u(t) {

for(i=0;i<2400;i++)x.beginPath(),x.arc(960+i*C(i/20),540+i*S(i/20)/3,29+i*i/2e4,0,7),x.fillStyle='#'+['000','A0E','FFF','9F0'][i%4],x.fill()

Jan 28 2017 10:00 PM UTC

}// 140/140

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Optical illusion: Go fullscreen and glance at the different parts of the image. As you move your eyes, it may seem like other parts of the image moves slightly.

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u/iverjo

This needs a large and bright display to work
u/donbright

lol i kept looking for 't' in your code, not there!
u/iverjo

Haha!
u/CliffJonesJr

I love these illusion dweets. Nice!
u/iverjo

Thanks :)
u/iverjo

#opticalillusion

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iverjo

remix of d/553 by u/iverjo

function u(t) {

a=13;for(i=0;i++<1e3;)s=45/(9-(t+i/99)%9),x.fillStyle=R((d=i*119)%256,d/1.4%256,d/7%256),x.fillRect(960+5*s*C(h=i*a+t),540+5*s*S(h),s,s)

Dec 23 2016 1:35 PM UTC

}// 136/140

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Play with the a variable

u/joeytwiddle

I did ask you asked! https://www.dwitter.net/d/3600

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iverjo

function u(t) {

c.width=2e3;n=900;for(i=9;i<n;i+=2)s=3/(9.2-(t/2+i/99)%9),x.beginPath(),x.lineWidth=s*s*4,x.arc(n,540+500*S(t),s*119,j=i*9,j+.6),x.stroke()

Aug 11 2016 11:34 PM UTC

}// 139/140

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u/sigveseb

this tunnel looks so clean!
u/iverjo

Thanks :) My aim was to create a vertical camera tilt effect. I ended up just moving everything up and down. Kinda resembles tilt ^^
u/iverjo

#tunnel

dwitter.net | RomanW (4170)