Random dweets | Dwitter

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.

Theme challenge of the month: #pumpkin

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scottglz

function u(t) {

for(X=71;X--;)for(Y=39;Y--;)x.fillStyle=X<24&Y<21?Y%2|(X-Y)%4|!Y|!X|Y>18?'#00f':'#fff':~~(Y/3)%2?'#fff':'red',x.fillRect(X*25,Y*25+X,25,25)

Mar 17 2017 8:04 PM UTC

}// 139/140

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Needs more golfing to add an animated wave

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u/magna

~~(Y/3)%2 can be shortened to Y/3&1
u/magna

(X-Y)%4 can be shortened to X-Y&3
u/magna

Added some waves (not so nice): https://www.dwitter.net/d/2188
u/scottglz

I had figured out Y/3%2 before I saw your comment, but X-Y&3 eluded me. Thanks!
u/recursive

I added some different waves. https://www.dwitter.net/d/2196
u/iverjo

#flag

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katkip

function u(t) {

if(!t){c.width=500;x.translate(244,140)};for(i=9;i--;)x.fillRect(i*10,(5*t)%20,5,20);x.rotate(1)

Apr 23 2020 1:11 PM UTC

}// 96/140

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#circlechallenge made by default

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trancor

function u(t) {

w=(c.width=999)/2;h=w/2;p=[];t/=8
for(j=12;j--;p.map((k,i)=>{x.moveTo(...z);x.lineTo(...k)}))
p.push(z=[S(t+j*4)*w+w,C(t+j)*h+h])
x.stroke()

Apr 27 2018 5:32 PM UTC

}// 140/140

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Thanks u/prplz for your golfing help to visualize bell numbers!

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WasifBoomz

function u(t) {

x.beginPath()
x.lineWidth=1
x.moveTo(50, 20)
x.quadraticCurveTo(Math.random()*t*50, Math.random()*t*30, t*50, t*80)
x.stroke()

Sep 9 2019 4:03 PM UTC

}// 126/140

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alech

function u(t) {

c.width=1920;for(i=0;i<7;i++){x.fillStyle=R(0,255*T(t*i*0.1),i*128*C(t));x.fillRect((i+1%2)*0.1*(400+i*150+S(t)*300),400+100*S(t*i),90,90)}

Mar 21 2017 11:32 PM UTC

}// 139/140

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Hedgehog

function u(t) {

x.strokeStyle = R(Math.random()*255, Math.random()*255, Math.random()*255)
x.strokeRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:16 PM UTC

}// 134/140

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Hmmmm

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taupelink

function u(t) {

t||(c.width=162,r=X=4567,s=Y=89,h=l=n=1,i=k=0)
r&&x.fillText(h+`x${X}+(${k})x${Y}=`+r,0,n++*9),q=r/s|0,[h,k,r,i,l,s]=[i,l,s,h-q*i,k-q*l,r%s]

Jul 1 2019 4:45 AM UTC

}// 140/140

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Extended Euclidean algorithm, to find h, k such that hX+kY=gcd(X,Y) #math #numbertheory

u/durian-favored-monster

i remember this in high school it was very cool! good job! this is the best text one i've seen
u/geb

EEA is so cool!

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username

remix of d/16821 by u/username

function u(t) {

d=960;c.width=2*d;for(i=0;i<333;i++)x.fillStyle=R(i%300,i%255,i%320,.4),x.beginPath(),x.fill(x.arc(d+300*S(i+t),540+300*S(i)+T(t-i),19,0,7))

Dec 10 2019 6:31 PM UTC

}// 140/140

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What way does it even rotate? Changes all the time for me personally.

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h6q

function u(t) {

i=new Image
    i.src='//具.pw'
    x.drawImage(i,0,0)

Feb 8 2018 5:30 PM UTC

}// 53/140

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!h6q: please link https://i.imgur.com/Sexr5xC.jpg

u/katkip

#external

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jylikangas

function u(t) {

for(c.width|=i=9,x.translate(960,540),x.rotate(S(t)*3);i--;x.fillRect((F=e=>--e*q*(D>1?D:1)-q/2)(i%3),F(i/3|0),q,q))D=t%2*6-i,q=400/(t%2-3)

Sep 16 2018 6:02 AM UTC

}// 139/140

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Block party

Show more comments…
u/BalintCsala

But....how?
u/katkip

wow
u/katkip

wow
u/katkip

wow
u/katkip

wow x952
u/lionleaf

Now that's impressive! #infinite #zoom
u/DataMeta

Brilliant.
u/joeytwiddle

Superb!
u/katkip

#beesandbombs
u/Cloud

Cooool!!!!

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