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.

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Current theme challenge: #Opposites

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veubeke

function u(t) {

t?_[Math.random(B=c.width^=0)*6|0]++:_=[0,0,0,0,0]
x.font='100px O'
_.map((v,i)=>x.fillText('🐌',110+v,$=200+i*179,x.fillRect(0,$-130,B,4)))

Mar 17 2017 10:17 PM UTC

}// 139/140

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Show more comments…
u/sigveseb

Lol!
u/veubeke

Fun hack: using *6 instead of *5 for the index adds a 6th element containing NaN. The 6th line is visible but not the snail because drawing the snail involves the NaN value.
u/gabrielsroka

neat, but are the snails going backwards?
u/innovati

you're too silly :3
u/tapgiles

What's with the _?
u/veubeke

@gabrielsroka: if you have an emoji font with a snail looking left then they’re going backwards, yes
u/lionleaf

Going backwards on my phone, but forwards on my laptop. This should be part of the snail emoji spec!!
u/veubeke

I’ll bring it up at the next snail emoji consortium meeting.
u/gabrielsroka

lol, they're soooo slow, they're going backwards. and yes, mine look left
u/gabrielsroka

according to http://emojipedia.org/snail/ Apple is in the minority, and Windows 8.1 looks left
u/magna

On my computer, the best snail always wins.
u/ilSilvano

Great idea! :-D
u/iverjo

#random
u/micahcowan

#emoji #snailrace

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magna

function u(t) {

x.fillRect(960+960*C(t*3)-1,540+540*S(t*5)-1,2,2);x.filter='sepia(100%) invert(100%)';x.drawImage(c,10,10,1900,1060,0,0,1920,1080);

Mar 17 2017 8:18 PM UTC

}// 131/140

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#waitforit

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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%n,Y=i/n,b=S(X/Y+t*t),x.fillRect(X/n*w,Y/m*h,b*s,b*s));

Mar 17 2017 7:16 PM UTC

}// 111/140

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u/recursive

like a corn field from the drivers' seat

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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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sfz

remix of d/2158 by u/sfz

function u(t) {

c.width=w=480;x.fillRect(0,0,w,w);t*=3;for(i=99;i--;t+=i)for(j=7;j>0;x.fillText((u+'')[~~t*j%137],t%w,t*i%w-i*j--))x.fillStyle=R(0,i?w:0)

Mar 17 2017 5:15 AM UTC

}// 137/140

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Metamatrix

u/donbright

i wonder if there is a way to mix this with Kalanchoe's technique from https://www.dwitter.net/d/1395
u/donbright

something like this r=Math.random t?o.push({X:480*r(),c:~~(r()*99),Y:0,ẏ:1}):(o=[]) c.width=480 o.map(a=>(x.fillText(String.fromCharCode(a.c++),a.X,a.Y+=a.ẏ)))
u/sfz

well, if you change the for loop to something like for(i=99;i>18;t+=i--) it gets rid of the clumpy crap on the left side, but I didn't figure that out until afte posting.
u/scottglz

The clumpy crap is my favorite part
u/joeytwiddle

#matrix

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jczimm

function u(t) {

b=t+4.5;t<2.5&&(x.beginPath(x.fill()),x.fillStyle=R(S(b*-23)*127+127,0,10),x.arc(960+50*T(b*10),540+30*S(b/2),b*30,15*b-1,15*b))

Mar 16 2017 11:48 PM UTC

}// 128/140

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u/tapgiles

Beautiful!

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mxfh

remix of d/2142 by u/mxfh

function u(t) {

c.width|=r=480
for(λ=φ=a=Math.PI;φ>-a;)x.arc((C(t+=a/r)*S(φ-=a/r)+C(λ))*r+960,S(φ)*S(t-λ)*r+r,1,s=a*S(λ+=a),s-a*2)
x.fill()

Mar 16 2017 9:46 PM UTC

}// 123/140

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#arc

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metaphalanges

function u(t) {

d=12;for(i=1;i<161;i++){for(j=1;j<91;j++){v=255-T(t+S(i+80)*t+C(j+45)*t)*125;x.fillStyle=R(v*S(t),v*C(t),v*T(t));x.fillRect(i*d,j*d,d,d);}}

Mar 16 2017 4:13 PM UTC

}// 139/140

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u/donbright

excellent colors

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hjroh0315

function u(t) {

c.width=1920; /* clear the canvas */
  for(i=0;i<10;i++)
  x.fillRect(960+S(t-i*10)*S(t)*200, 600+C(t-i*10)*C(t)*200, 50, 50)

Mar 16 2017 8:49 AM UTC

}// 125/140

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

c.width^=0
t?o.push({X:1e3,Y:500,U:S(t*t),V:C(t*t)}):o=[]
o.map(a=>{a.X+=a.U,a.Y+=a.V,x.fillRect(a.X,a.Y,9,9)})

Mar 16 2017 7:25 AM UTC

}// 111/140

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inspired by Todd Hopkinson http://codegolf.stackexchange.com/questions/…

dwitter.net | sfz (8520)