New #heavy dweets

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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nburn42

remix of d/19043 by u/nburn42

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(j=t%8e6,m=x.getImageData(0,0,2e3,1e3),g=m.data;j<8e6;j+=5+t)g[~~j]=255-g[~~j]
x.putImageData(m,0,0)

Jun 5 2020 3:02 AM UTC

}// 127/140

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Turns on the fans on my laptop

u/joeytwiddle

#heavy

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henrosaurus

function u(t) {

c.width|=0
with(x)for(i=999;i--;fill())fillStyle=R(255*T(i)*S(t),0,t),beginPath(),arc(960+S(i+t)*i,540+T(i)*S(t)*i,i*Math.abs(C(t))+i,0,6)

Aug 16 2019 10:46 PM UTC

}// 138/140

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burning temple

u/hope4tg

also burning my pc
u/joeytwiddle

Interesting #fire #heavy

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joeytwiddle

remix of d/12994 by u/KilledByAPixel

function u(t) {

x.textAlign='center';for(X=W=300;X--;)x.font=W*(1+S(X+t))+"px'",x.fillStyle=R(99*(1+S(X*X+t*(X%5))),0,0,1),x.fillText("♥",X%16*150,99*X/16)

Apr 6 2019 8:17 AM UTC

}// 139/140

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Love comes and goes 💕

u/joeytwiddle

#heavy Performs ok in Firefox if you wait for font sizes to cache
u/KilledByAPixel

awesome, much better then the original!

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yonatan

remix of d/10850 by u/yonatan

function u(t) {

for(c.width=i=w=200,x.font='9em"',x.strokeText(u,-t*w,310);i--;x.drawImage(c,0,w,w,w,i,i,s=w-i*2,s))x.filter='invert('+i/99+1

Nov 7 2018 3:41 PM UTC

}// 125/140

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just some #text fx

u/sharpaxe

#lag welp
u/joeytwiddle

These run ok on Firefox, but terribly on Chrome. #heavy
u/joeytwiddle

But another epic #quine effect anyway! #perspective
u/prplz

weird, it runs better on chrome than firefox for me
u/yonatan

for me too

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yonatan

remix of d/10704 by u/yonatan

function u(t) {

eval(unescape(escape`挮楮湥版呍䰽怼獶朾㱦楬瑥爠楤㵦㸼晥呵牢畬敮捥⁢慳敆牥煵敮捹㴮〰ㄠ湵浏捴慶敳㴵 㸼晥䑩獰污捥浥湴䵡瀠獣慬攽⑻匨琩⨹㤹紾总砮晩汬呥硴⡸⹦楬瑥爽≵牬⠣昩∬〬〩`.replace(/u(..)/g,"$1%")))

Oct 26 2018 12:31 PM UTC

}// 124/140

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#waitforit (unless you just see a blank canvas, then it's broken)

u/joeytwiddle

Wow that's beautiful! But #heavy on some machines #plasma #cloud #oil #oil_spill

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rbong

remix of d/697 by u/p01

function u(t) {

for(n=210;n-=1/64;x.fillStyle=`hsl(${k*22},99%,50%)`,x.fillRect(n%3*666,n*5,16,16))for(r=C(t),i=S(t),k=28;--k/r;i=j)j=r*i-n/99,r=r*r-i*i-n%3

Oct 20 2018 5:53 PM UTC

}// 140/140

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Rainbow Fractal Slice

u/rbong

#fractal #rainbow
u/prplz

#heavy
u/rbong

Looks a bit heavier than the original because I had to slow it down, but it's the same intensity. I would like to make a faster Mandelbrot/Julia set. This is closer to the original effect:
u/rbong

c.width|=0;for(n=200;n-=1/64;x.fillStyle=hsl(${k*22},99%,50%),x.fillRect(n%3*666,n*5,16,16))for(r=C(t*3),i=S(t*4),k=28;--k/r;i=j)j=2*r*i+1-n/99,r=r*r-i*i+1-n%3
u/rbong

Insert backticks where the style changes in that comment, I can't edit it

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firegodjr

remix of d/9058 by u/firegodjr

function u(t) {

l=10
for(j=200;j--;)for(y=100;y--;)x.fillStyle=`hsl(${(S(t)*(j-99)+C(t)*(y-50)^S(t)*(y-50)-C(t)*(j-99))},99%,50%`,x.fillRect(j*l,y*l,l,l)

Aug 2 2018 1:25 PM UTC

}// 137/140

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#heavy

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joeytwiddle

remix of d/8414 by u/joeytwiddle

function u(t) {

t=9+t/5e2;for(c.width|=0,i=4e3;i--;x.beginPath())x.globalAlpha=.05,x.arc(S(i*i/1e4*t)*i/3+960,C(i*i/1e4*t)*i/4+540,i/30+2,0,7),x.fill()

Aug 1 2018 2:30 AM UTC

}// 135/140

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Eye of the storm #heavy

Show more comments…
u/aleamb

wow!
u/iverjo

This is so cool! Also, in fullscreen it looks like the innermost part of the storm is slowly rotating clockwise #opticalillusion
u/katkip

#storm #clouds
u/magna

This is nuts!
u/Xen

Love It!
u/lionleaf

Times out on my phone. We should increase the timeout limit somewhat
u/joeytwiddle

In the end, we did!
u/joeytwiddle

Many of the start points exhibit patterns, e.g. t=98.99+t/2e2
u/vain

WTF? Amazing!
u/joeytwiddle

This was a happy accident. I was drawing a spiral, and thought "What if the arms rotate with i*i instead of i?" Of course, this makes the outer points spin faster, and distributes the points semi-randomly.

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New_Core

remix of d/3510 by u/New_Core

function u(t) {

for(a=c.width|=i=9;i--;x.fillRect(740+650*S(t*.9+i*4),350+280*C(t+i),400,400))x.filter='blur(100px)',x.globalCompositeOperation="lighter"

Dec 30 2017 10:16 AM UTC

}// 138/140

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u/joeytwiddle

This is very heavy on my laptop! Remixed here: #4841
u/joeytwiddle

Very nice though. It plays tricks on my eyes, seems to be always growing.
u/New_Core

Sometimes dwitts gets heavy here also scrolling down the list.. most times it help to copy the share link and look at it alone, but yea this one can be heavy, running lots of filters and "gCO"'s
u/13thptr

#heavy #metaballs -like effect

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joeytwiddle

remix of d/2737 by u/nystrand

function u(t) {

c.width|=p=(S,D=20,X=2*S,Y=X,k=_=>p(S*.79,D-1,X+2*S*r()-S,Y-S*r()/2))=>D&&x.fillRect(X,Y,S,S,k(k(x.globalAlpha=.01)));t?p(500):r=Math.random

May 24 2017 5:26 AM UTC

}// 140/140

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Rain cloud slideshow

u/joeytwiddle

Thanks to golfing tricks from nystrand, I could create a gallery
u/iverjo

Neat!
u/hollo47

This is some next level shit, I don't even know where it starts!
u/joeytwiddle

We can save 7 chars by removing D entirely and using S>7
u/joeytwiddle

#clouds #heavy Set D=18 for faster rendering

You've reached the end.

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