Dweets awesomed by u/interSrc

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: #ScaryMovies

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mxfh

remix of d/2180 by u/aemkei

function u(t) {

for(i=W=c.width=2e3;i--;x.beginPath(),x.arc(W*(T(i/9)+s*t)%W,540+540*S(s*W),s*30,0,7),x.fill())s=149/(i*3+199)

Mar 18 2017 3:05 AM UTC

}// 110/140

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arc all the things

u/iverjo

#parallax #dots
u/mxfh

#arc

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magna

remix of d/2172 by u/magna

function u(t) {

c.width=w=1920;h=1080;n=128;m=72;s=w/n;for(i=n*m;i--;X=((i+t/9)%(m*n))%n,Y=i/n,b=S(X*Y)**.5,x.fillRect(X/n*w,Y/m*h,b*s,b*s));

Mar 17 2017 5:52 PM UTC

}// 125/140

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interSrc

remix of d/1749 by u/interSrc

function u(t) {

a=S(t)
x.fillStyle=`hsl(${t*99},99%,${50+a*50}%)`
t||x.translate(960,540)
for(i=0;i<48;i++)x.rotate(.2),x.fillRect(X=i*9+a*500,X,s=i*9,s)

Mar 2 2017 8:28 AM UTC

}// 137/140

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u/FireFly

Sweet! I love colourful demos
u/5Mixer

Looks awesome. Reminds me of really old windows media player 'visualisations', form like, Win XP, if you remember them. Nice :)

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interSrc

function u(t) {

a=S(t)
x.fillStyle=`hsl(${t*99%360},99%,${50+a*50}%)`
t||x.translate(960,540)
for(i=0;i<9;i++)x.rotate(.2),x.fillRect(X=i*9+a*500,X,s=i*9,s)

Mar 2 2017 8:16 AM UTC

}// 140/140

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puckipedia

function u(t) {

c.width+=0,c.onmousemove=d=>a=d.clientX*3;z=(t?z:Array(f=1e3).fill([a=f,0])).map(([w,e],i)=>(x.fillRect(w,i,9,9),[w+e*i/f+e/9,(e*6+a-w)/9]))

Mar 1 2017 7:29 PM UTC

}// 140/140

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Just a wobbly line.

Show more comments…
u/sfz

was staring at this waiting for something to happen longer than I like to admit XD
u/lionleaf

Amazing. Love these interactive ones
u/iverjo

+1 for the physics :D
u/iverjo

mildly entertaining to play with
u/hamptonio

nice!
u/recursive

I learned something new! Destructuring assignment!
u/iverjo

#interactive
u/katkip

#physics

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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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donbright

function u(t) {

c.width=900;半=450;for(i=0.0;i<360;i+=1){x.lineTo(半+C(i*t/10)*i,半*9/16+S(i*t/10)*i)};x.stroke();

Feb 22 2017 2:31 AM UTC

}// 95/140

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u/lionleaf

Starts off nice looking and becomes extremely trippy and hypnotic!
u/inviso

mesmerizing
u/ilSilvano

wow that escalated quickly.
u/elanimus

someone tell me how to run this please
u/Xen

Golfed and tweeked, #2909 ;-)
u/sparr

This is a browser glitch, right? It only looks cool because the browser starts using too few segments to draw the spiral. Would be boring in a fixed browser.
u/Haabilo

@sparr Not really a glitch. The code uses lineTo as means to straw the lines. It also sets the maximum amount 5
u/Haabilo

...of the segments. Damn, I didn't think mistapping backspace on mobile would send the comment as-is...
u/ArtsyBiker1

Awesome
u/blackvitriol

welcome to time travels :)
u/hoppla1232

Sir Moire apprecetiates this
u/Freak

This is like one of those nightmares I have where everything keeps on getting faster and it scares me and I love it
u/joeytwiddle

This is for me the definitive dwitter dweet #spiral
u/geb

#background

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mxfh

function u(t) {

d=x.getImageData(0,0,w=c.width=256,h=144);for(i=0;i<h;i++)for(j=0;j<w;j++)d.data[(i*w+j)*4+3]=(i-j&j+i)*t%w;x.putImageData(d,0,0)

Feb 20 2017 3:43 AM UTC

}// 129/140

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u/jim

This is my favorite demo on Dwitter so far
u/mxfh

first draft on documenting the more obvious parts: https://news.ycombinator.com/item?id=13712558
u/hamptonio

pretty sick
u/mxfh

drone audiosoundtrack paste this:
u/mxfh

;new Audio("data:audio/wav;base64,"+window.btoa('RIFF$WAVEfmt data'+x.getImageData(0,128,c.width,32).data.reduce((data,byte)=>data+String.fromCharCode(byte),''))).play()
u/mxfh

//safer encoding: ;new Audio("data:audio/wav;base64,UklGRiQAAgBXQVZFZm10IBAAAAABAAIAAIAAAAAAAgAEABAAZGF0YQAA"+window.btoa(x.getImageData(0,128,c.width,32).data.reduce((data,byte)=>data+String.fromCharCode(byte),''))).play()
u/Xaviaro

Breathtaking!
u/lionleaf

#fractal #recursive
u/Galaxtone

Of you let it run long enough it returns to the original image but sort of pixelated and a little more and it'll return to the original image

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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)

Jul 21 2016 8:08 PM UTC

}// 136/140

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u/iverjo

Nice remake of https://youtu.be/sQNcIKAIBF0?t=4m6s :D
u/iverjo

1/Z*4e3 can be replaced with 4e3/Z
u/sigveseb

Right you are! I thought I had already done that :3
u/Ameo

Holy s*** that's absolutly amazing.
u/sebbert

TiTAAAAAN

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icecuber

function u(t) {

c.width=192;A=Math.abs;Y=A(t*99%176-88);X=A(t*139%376-188);x.F=x.fillRect;x.F(X,Y+7,3,3);x.F(187,Y+C(X/39)*29,5,20);x.F(0,Y-S(X/29)*22,5,20)

Apr 24 2016 12:39 PM UTC

}// 140/140

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u/lionleaf

I'd love a blog post explaining how you approached creating this one!
u/iverjo

+1
u/SpecialAgent

+1
u/FireFly

I love this one—the movement doesn't really feel all that artificial despite being so. Hats off for figuring out how to get the pads to that :)
u/dh7

+1 very well done !!!
u/joeytwiddle

Amazing. Looks so real. Some handy techniques in here too :)
u/donbright

genius
u/TheGreatRambler

How do you do that under 140 chars?
u/lionleaf

#pong
u/lionleaf

#game
u/joeytwiddle

#tribute
u/Lazy1337

#witchcraft
u/vain

incredible - great work

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