Dweets awesomed by u/ssg

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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Current theme challenge: #Food

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magna

remix of d/1289 by u/magna

function u(t) {

e=1e4;(i=new Image).src=c.toDataURL('image/jpeg',q=.8).replace(eval(`/(.{${t%e+e}})./`),'$1a');x.globalAlpha=q;x.drawImage(i,0,3,1920,1070);

Feb 25 2017 2:58 PM UTC

}// 140/140

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Island at Night (wait until it stabilizes - works only on Chrome)

u/sigveseb

this is an excellent idea!

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Pyrofoux

function u(t) {

x[f="font"]=g="140px A",n=Array(9).join(0/0);7-(t=~~t%8+1)?x[h="fillText"](n,0,t<<8)+(5-t||x[h]("🦇",874,560,c.width^=0,x[f]=g)):c.width^=0

Feb 25 2017 2:41 PM UTC

}// 138/140

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Show more comments…
u/iverjo

Haha, I believe this is a reference to "wat" ^^
u/andres

Is this broken because of the emoji?
u/kaicarver

NaNNaN NaNNaN NaNNaN NaNNaN BATMAN!! :-) https://youtu.be/EtoMN_xi-AM
u/iverjo

3:31 in this video: https://www.destroyallsoftware.com/talks/wat
u/sigveseb

:D
u/Kalanchoe

Haha, nice reference! For those who see boxes, it's supposed to be a bat emoji (U+1F987)
u/d0n.key

I actually wanted to type "BATMAAAAN!!!" in the comments, but jokes on me...

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magna

function u(t) {

e=1e4;(i=new Image()).src=c.toDataURL('image/jpeg').replace(eval(`/(.{${t%e+e}})./`),'$1a');x.globalAlpha=.8;x.drawImage(i,0,0);

Feb 25 2017 4:46 AM UTC

}// 128/140

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Urban Pollution

u/SpecialAgent

This is a very nice effect, my browser ran out of memory after a short while though. ;)
u/iverjo

Haven't seen this technique before. How does it work?
u/magna

@iverjo: I keep exporting the canvas as base-64 JPEG and randomly screwing up with the data at a particular range that gives this effect while keeping the JPEG intact. Prior art: https://github.com/snorpey/jpg-glitch

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aemkei

function u(t) {

c.width^=0;t||(I=140,p=[]);for(p[I++*I%41+
3178]=i=599;i++<3230;
)x.fillRect(i%70*20,i/70*20,p[
i]=p[i]+p[i+1]+p[i+69]+p[i+70]>>2,12);

Feb 24 2017 10:18 PM UTC

}// 134/140

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Fire and smoke

Show more comments…
u/iverjo

Neat!
u/donbright

dang this is cool.
u/sigveseb

can we add colors? :D
u/Kalanchoe

This is quite pretty!
u/Beginner

Needs colors :D
u/Xen

Color added: #3002
u/joeytwiddle

#fire

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iverjo

remix of d/89 by u/iverjo

function u(t) {

c.width^=0;for(i=5e3;i--;)p=3*t+S(t/2)*i/3e3+i%4/.637,d=C(p)-S(p),d>0&&x.fillRect(960+199*S(p)+249*S(t/.7+i/6e3),i/4-2,199*d,1/(d+1))

Feb 24 2017 6:50 PM UTC

}// 133/140

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u/SpecialAgent

nicely done!
u/Kalanchoe

Flawless!
u/donbright

oh wow, the shading!
u/sigveseb

Good twister! Can we add color?
u/iverjo

Color would be awesome :) Feel free to try to add it
u/sigveseb

https://www.dwitter.net/d/1267 red
u/iverjo

Here's a purple version. Had to make some compromises. https://www.dwitter.net/d/1278
u/donbright

i attempted a rainbow version https://www.dwitter.net/d/1282
u/iverjo

#twister
u/vain

nice twister

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iverjo

remix of d/104 by u/iverjo

function u(t) {

c.width^=0;for(i=9;i<2e3;i+=2)s=3/(9.1-(t+i/99)%9),x.beginPath(),j=i*7+S(i*4+t+S(t)),x.lineWidth=s*s,x.arc(960,540,s*49,j,j+.6),x.stroke()

Feb 24 2017 6:47 PM UTC

}// 138/140

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Show more comments…
u/SpecialAgent

my hat goes off to you sir!
u/Kalanchoe

That's unbelievable
u/iverjo

Try this one in fullscreen for a more immersive experience
u/Niklas

impressive!
u/donbright

:)
u/aendrew

This is incredible.
u/vonzo

reminds me to Gescom <3
u/hvge

http://www.pouet.net/prod.php?which=3397 ❤️
u/badthai

How did you come up with this?
u/iverjo

@badthai: First I made a classic tunnel effect (like this: https://www.dwitter.net/d/205). Then I made several remixes of it by tweaking parameters. This was one of the results. See also https://www.dwitter.net/d/106
u/iverjo

#tunnel
u/vain

cool segmented tunnel fly

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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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p01

function u(t) {

for(d=2e3;d--;x.fillRect(960+d*C(a),540+d*S(a),24,24))a=Math.random()*6.3,x.fillStyle=R(e=255*C(t-1e3/d*S(t-a-C(a*99/d))),99*S(a-e/d),6e4/d)

Feb 22 2017 11:45 PM UTC

}// 140/140

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u/sigveseb

Nice!
u/ninerdelta

wow!
u/p01

Thanks :)
u/ArtsyBiker1

Awesome!
u/TheGreatRambler

Messing with my brain!
u/lionleaf

#tunnel

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ssg

function u(t) {

x.fillStyle="#816";x.fillRect(0,0,1920,1080);x.font="1400px impact";
x.fillStyle="#fea";x.fillText("arteffect",S(t)*1920-1800,1200+C(t)*400)

Feb 22 2017 7:11 PM UTC

}// 140/140

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u/sigveseb

141 characters? :O
u/sigveseb

What, now it says 140. Must be a bug in dwitter o.O
u/ssg

@sigveseb yeah it says 141 to me too now :)
u/c64skate

probably caused by \r\n, typical :)

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iverjo

remix of d/123 by u/icecuber

function u(t) {

i=frame;for(j=1080;j--;){a=b=0;for(k=35;k--&&a*a+b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillStyle=R(k,j,i);x.fillRect(i,j,1,S(k/9))}

Feb 22 2017 6:10 PM UTC

}// 140/140

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Color version, a minified version of myJS's suggestion

Show more comments…
u/bakkot

golf'd slightly harder on general principles: i=frame;for(j=1080;j--;x.fillRect(i,j,1,S(k/9),x.fillStyle=R(k,j,i)))for(a=b=0,k=35;k--&&a*a+b*b<4;a=c)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1
u/donbright

niiiice
u/Krachwumm

This is freaking amazing. Even if it would have taken you 1000 characters
u/iverjo

Thanks bakkot! I golfed your version even further down to 134 characters: for(j=1080;j--;x.fillRect(i=frame,j,1,S(k/9),x.fillStyle=R(k,j,i)))for(a=b=0,k=35;k--&&a*a+b*b<4;a=c)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1
u/iverjo

Feel free to play with the colors! There's room for improvement
u/hamptonio

That's a work of art man
u/SpecialAgent

I must commend you! Did my research and got a working mandelbrot, but to golf it to 140 and get the speed is very very difficult! Wow. I will study your dweet now :)
u/iverjo

#fractal
u/iverjo

#mandelbrot
u/iverjo

#slow_render
u/f8f82804

#scanline

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