Dweets awesomed by u/sfz

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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magna

remix of d/2370 by u/magna

function u(t) {

c.width|=0;for(i=9;i--;x.fillRect(400+i*100+S(t)*300,400,50,200));with(c.style)background=`linear-gradient(${S(t)}turn,#ccc,#fff,#ccc)`;

Apr 1 2017 6:03 AM UTC

}// 136/140

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More thinking outside the box

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u/sigveseb

This is cool
u/donbright

haha best remix of default
u/magna

Heh, thanks! Though, I'd argue that techniques like these are probably "illegal" due to use/abuse of things external to the canvas. And dweets like these are bound to eventually break as the Dwitter runtime is updated. But, hell, this is fun!
u/nonce

I think this is Kosher. You are manipulating the canvases style after all. Also you don't need the with c.style.background= is 5 char shorter
u/magna

Ah dang. That's a vestige of trying to add more effects to this :)
u/magna

#default
u/fujimotos

#light

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magna

function u(t) {

c.width=1920;for(i=9;i--;x.fillRect(400+i*100+S(t)*300,400,50,200));with(c.style)transform=`perspective(200px)rotate3d(1,1,1,${S(t/9)}turn`

Apr 1 2017 4:43 AM UTC

}// 139/140

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Thinking outside the box.

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u/sigveseb

:D
u/lionleaf

haha, amazing
u/aemkei

Super fun! It's the perfect demo for April Fool's day.
u/magna

:D
u/magna

#default
u/katkip

#d3

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magna

remix of d/2352 by u/sfz

function u(t) {

c.width=w=512
with(x)filter='sepia(1',fillRect(0,h=240,w,w),font='9em a',fillText('🚃',w-(t*w&1023),h+(t&4)),fillRect(Math.random()*w,0,1,w)

Apr 1 2017 2:09 AM UTC

}// 139/140

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u/cantelope

all aboard the steampunk trolly!
u/nonce

ahahaha
u/magna

Challenge: Add vignette, film grain and random scratches.
u/magna

#film

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codeslaw

function u(t) {

m=400
x.fillRect(0,0,c.width|=i=m*5,i)
x.globalCompositeOperation='screen'
while(i--)x.fillText('💙❤️💚',990+S(t/i**.1)*m,550+S(i/t**.02)*m)

Mar 31 2017 8:50 PM UTC

}// 138/140

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Analog

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u/magna

OMFG
u/nonce

oh my, this is great.
u/nonce

I feel like this might open the floodgates with people making use of the globalCompositeOperation setting... if only it was shoter :-p
u/codeslaw

You take a 30-40 char hit depending on which mode, but there's still room for fun :D
u/donbright

doesnt seem to work on linux chrome or linux firefox
u/codeslaw

Ah bummer

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z3vin

function u(t) {

r=(n)=>Math.random()*n;w=i=1920;while(i--)x.fillRect(q=r(i),r(T(t)*i),r(z=4),r(z)),x.clearRect(q,q+S(t)*i/1.5,r(1)/6,w/8),x.globalAlpha=.6

Mar 31 2017 8:27 PM UTC

}// 139/140

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u/donbright

fascinating

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Jenky

function u(t) {

w=c.width|=0
for(i=0;++i<99;)z=50+~~(i**2/80),x.font=z+`px a`,x.fillText(['🌲','🌳'][i%2],(S(i)*w+t*z*4)%(w+z)-z,z*5)

Mar 31 2017 11:58 AM UTC

}// 115/140

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Trees to go along with https://www.dwitter.net/d/2352 :D

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u/Jenky

I challenge someone to combine the two, golfing that is gonna be a doozy
u/z3vin

i love this can you explain: z=50+~~(i**2/80), specifically ~~ and **
u/nonce

~~ is Math.floor() and ** is Math.pow(), I do not understand why you need to floor? Why do you need an integer z? Also i*i is 1 char shorter than i**2 so you could shorten it to: z=50+i*i/80 am I missing something?
u/nonce

FWIW you can have a non integer font size
u/nonce

Golfed a bit, removed the pines (they are evergreen) and added a season: https://www.dwitter.net/d/2361 (autumn)
u/Jenky

Totally missed that, and didn't realise fonts could have floating px. Nice remix, too :D
u/sfz

floating px makes the rendering much slower but it's doable with a reasonable amount of entities
u/nonce

@sfz what about floating em? What is the perf like for that?
u/aemkei

Nice one! Really love the style.
u/aemkei

You can save ~9 bytes:
u/aemkei

for(w=c.width|=i=0;++i<99;)z=50+(i**2/80),x.font=z+px a,x.fillText(i%2?'🌲':'🌳',(i**7+t*z*4)%(w+z)-z,z*5)
u/tapgiles

Very nice!
u/Polyducks

omg haha are these emoji!? That's so smart!!!
u/joeytwiddle

#landscape #parallax #trees
u/micahcowan

#emoji
u/katkip

#perspective

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sfz

function u(t) {

c.width|=F=I=69
O=C(t/3)
for(i=F;i--;)I=S(t-i+I*I-O*O),X=i%3*(O-I)+4*I,Y=i/3%3*(I+O)+2*I,Z=i/9*(2-I+O),s=F/Z,x.fillRect(F*i+X*s,9*i+Y*s,s,s)

Mar 31 2017 5:43 AM UTC

}// 140/140

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Perspective thingy

u/cantelope

nice golfing
u/Qwitter

thumbs up :)

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sfz

remix of d/2351 by u/nonce

function u(t) {

c.width=w=512
with(x)fillRect(0,h=240,w,w),clearRect(t*999%w-31,h+7,93,9),font='9em a',fillText(['🚗','🚃','🚙'][~~(t/2)%3],w-(t*w&1023),h)

Mar 31 2017 4:25 AM UTC

}// 136/140

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nonce

function u(t) {

c.width=600
x.font='9em a'
x.fillText(['🚗','🚃','🚙','🚚','🚌'][(_=~~(t/2))%5],620-(t*512&1023),250)
c.style.filter=`hue-rotate(${_*60}deg`

Mar 31 2017 3:41 AM UTC

}// 135/140

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Traffic

u/nonce

(count the colors)
u/cantelope

i think i saw my car!

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donbright

remix of d/2333 by u/Jenky

function u(t) {

r=Math.random
t?(p=s[d%2]+=(d/2<1?4:-4),s[d%2]=p>800?0:p<0?800:p,x.fillRect(...s,8,8),d=((~~(C(t)*4)))%4):(s=[96,96],d=0)

Mar 31 2017 2:07 AM UTC

}// 121/140

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based on Jenky's brilliant drawing program in dwitter, i removed the human element and substituted cosine. I like the simple pattern it makes and the way it slowly, hesitantigly draws it. The squares don't overlap for several minutes. Thanks @Jenky

u/cantelope

seems like you could remove r=Math.random :3
u/donbright

lol oops
u/alien

wow

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