Dwitter - javascript demos in 140 characters

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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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: #Food

show FPS hide FPS share fullscreen

firegodjr

remix of d/8775 by u/yokljo

function u(t) {

with(x)for(k=2154;k--;beginPath(strokeStyle=R((S(t*2)+2)*50)))arc(540,540,k/4,v=k%4*1.57+S(t*3-k/280)+t,v+.2),stroke()
x.drawImage(c,5,0)

Jun 28 2018 6:14 PM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Red Velvet Rose

show FPS hide FPS share 1 remix fullscreen

magna

function u(t) {

x.fillRect(0,0,c.width=w=255,w)
for(i=99;i--;x.fill(x.arc((t*b*i+i*i)%w,99+b,5+b/5,!x.beginPath(),7)))b=i&1?1:-1,x.fillStyle=R(w,b*w,b*w,.2)

Jun 26 2018 3:22 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Highway at night #bokeh

u/lionleaf

I like it! #traffic
u/magna

2 chars shorter, yellow headlights: with(x)for(i=fillRect(0,0,c.width=w=255,w)|99;i--;fill(arc((t*b+i)*i%w,99+b,5+b/5,!beginPath(),7)))b=i&1?1:-1,fillStyle=R(w,b*w,b*w*.8,.2)
u/aleamb

absolutely beautiful, magna
u/joeytwiddle

Love it. Reminds me of Mercury - The Timeless. Would be great to get some z-axis going.
u/magna

Thanks folks!

show FPS hide FPS share fullscreen

micahcowan

function u(t) {

c.width|=0
for(i=10;--i;)h=1+i+Math.abs(1-t%2)*6,m=d=>(h/d%2*128),x.fillStyle=R(m(4),m(2),m(1)),x.fillRect(h*100,400-100*S(h),50,200);

Jun 30 2018 5:00 AM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Multi-color inchworm #default

show FPS hide FPS share fullscreen

Agnes

remix of d/8761 by u/magna

function u(t) {

c.width=240
with(x)font='6em"',fillText('👌',110,110),rect(0,0,160,1e4),clip(),setTransform(0,1,-1,0,160,30),fillText('☝️',0,100+30*S(t*4))

Jun 27 2018 8:06 PM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Proof of concept. Christ, what am I doing with my life #sex

Show more comments…
u/Agnes

(You may have to tweak the numbers to get it to line up with your emoji set, it looks all right for me on Windows/Chrome)
u/micahcowan

Fixed for Mac/Chrome: c.width=240 with(x)font='6em"',fillText('👌',107,110),rect(0,0,160,1e4),clip(),setTransform(0,-1,-1,0,0,140),fillText('☝️',0,-65+30*S(t*4))
u/micahcowan

(I was thinking it would look better with a clip() when I saw u/magna's. Nice!)
u/katkip

ew
u/Purpzie

no thanks
u/f8f82804

#emoji

show FPS hide FPS share fullscreen

firegodjr

remix of d/8739 by u/firegodjr

function u(t) {

with(x)for(k=2e3;k--;)arc(960,540,j=k/4|0,v=k%4*1.57+S(s=t+j/50)*T(s)+S(t),v+.2),stroke(),beginPath(strokeStyle=`hsla(${j+t*80},90%,50%,.3`)

Jun 27 2018 4:37 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Psychedelicacy 👌

show FPS hide FPS share 2 remixes fullscreen

magna

function u(t) {

c.width=240
with(x)font='6em"',fillText('👌',110,110),scale(-1,1),translate(-160,30),rotate(-1.57),fillText('☝️',-110,100+S(t*4)*10)

Jun 27 2018 2:57 PM UTC

}// 131/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

NSFW #nsfw #sorry

u/micahcowan

#emoji
u/Agnes

You could use clipping to have the pointing hand disappear into the OK hand if you placed the clip rectangle just right. I don't know how you would save up the characters though, maybe by using a for loop to only have one fillText call (but that would also eat characters with all the ?: statements you'd have instead).
u/magna

Yeah, clipping would make it awesome! Let's see if this can be golfed down significantly to open up space for some clipping.
u/Agnes

I posted a clipping remix. You can do scaling, translation and rotation in a single call to setTransform.

show FPS hide FPS share fullscreen

magna

remix of d/8757 by u/micahcowan

function u(t) {

c.width|=D=C(r=3*S(t))
x.setTransform(1+9*D,U=S(r)*5,0,9+D,825-40*U,99*D)
for(i=9;--i;x.fillRect(-52.5+i*10,40,5,20))x.fillStyle=R(D<0&&255)

Jun 27 2018 5:38 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Show more comments…
u/micahcowan

😍
u/micahcowan

Very useful shortcuts, I'll have to use them in future. ...I'm thinking like a C programmer - in the C standard the order in which arguments are evaluated is unspecified; apparently the ES standard strictly defines order-of eval to be the intuitive left-to-right order. Good to know!
u/micahcowan

Ha, it feels "wrong" to set fillStyle 9 times in a row. But a great way to eliminate that last little character!
u/micahcowan

#default
u/magna

When you're out of characters you can shave "legally", you have to start compromising and enter the "wrong" and/or "meh, it's just a good approximation" territory :)
u/magna

Like Math.PI * 2 === 7
u/micahcowan

Heh, totally. :D
u/pythech

hack to save 2 chars: x.fillStyle=R(-D*9e7)
u/pythech

I guess that's "meh" territory
u/magna

@pythech nice!

show FPS hide FPS share 3 remixes fullscreen

firegodjr

function u(t) {

with(x)for(fillRect(p=3.14,0,Y=2e3,Y),k=Y;k--;)arc(960,540,j=k/4|0,v=k%4*p/2+S(t*3-j/70)+t,v+200/j),stroke(),beginPath(fillStyle="#fff1")

Jun 26 2018 1:32 AM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

The Orb

u/magna

Whoa!
u/Xen

nice style
u/firegodjr

Thanks guys ^^

show FPS hide FPS share fullscreen

Xen

function u(t) {

for(i=9;i--;x.strokeStyle=`hsl(${t*i*t},99%,40%)`)x.strokeRect(400+i*99+S(t)*300,400,50,200)
x.drawImage(c,C(t/4),S(t/4))

Jun 27 2018 7:18 PM UTC

}// 121/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#default

u/DataMeta

Totally cool

show FPS hide FPS share fullscreen

yokljo

function u(t) {

c.width|=0
x.font="900px A"
x.fillText("🏢",g=700,g)
x.font="90px A"
for(i=0;i<9;i++)n=(t+i)*90%350,x.fillText("🚹",g+n/2+i*17,1160-n)

Jun 27 2018 12:55 PM UTC

}// 132/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/micahcowan

Damn! Worked on Chrome on my Android, but not Chrome on my Mac (weird). The building isn't visible. #emoji
u/joeytwiddle

256px is the highest you can go on Mac Chrome, 324px on Mac Firefox. To work around, scale down the canvas.
u/BirdsTweetCodersDweet

Works fine on Chrome on Linux