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.

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taupelink

remix of d/15380 by u/taupelink

function u(t) {

g=(a,b)=>b?g(b,a%b):a;f=()=>Math.random()*1e7|0;t||(m=n=0);n++;g(f(),f())-1||m++;x.fillRect(n%1920,1080*(1-m/n),1,1);throw m/n

Aug 11 2019 4:25 AM UTC

}// 126/140

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If you take two random integers of at most 7 digits each, what is the probability that they are relatively prime? This simulation suggests somewhere around 60%

u/taupelink

In the graph, the x-axis shows number of trials, modulo 1920 (i.e. with wraparound). The y-axis shows % of trials with GCD 1, with 0% at bottom and 100% at top.
u/taupelink

After a little Web searching: Under more general conditions, the precise answer appears to be 6/π^2, or about .608. See, e.g., https://www.cut-the-knot.org/m/Probability/T…
u/aleamb

#math

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Joachim

function u(t) {

eval(unescape(escape`󩭯󬬨󮍛󩬽󙽦󪝬󫍒󩝣󭌧󧜨󪜽󜌬󜌬󮬽󨼮󭽩󩍴󪌽󜼱󞜬󮬩󞽩󟍺󚬹󞜻󪜫󚼩󮌮󩭩󫍬󤽴󮝬󩜽󤬨󢜽󪜥󚍺󚬲󚜬󫬽󪜭󢜬󤼨󩌽󭌫󮬯󢜩󚭺󛍉󚬽󛬰󜬩󛍸󦽦󧜨󜜵󜌫󠼨󭌫󩌪󞜩󚭉󚬴󚽮󚭉󛽺󛝉󚬵󜌬󝼰󚽉󚬱󜼫󠼨󩌪󝬫󫬩󚭃󚍮󚜪󢜪󞜬󢜯󞜬󢜯󞜩`.replace(/u../g,'')))

Jun 22 2022 1:08 PM UTC

}// 129/140

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u/vain

Very nice and stylish. love the depth fx too
u/taupelink

cool!
u/jellyedwards

Wow that's amazing

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sukkamehu

function u(t) {

x['globalAlpha']=0.05,x['beginPath'](),x[l='lineTo'](400,100),x[l](10,800),x[l](800,800),x['closePath'],x['fill'](),x['rotate'](t);

Jun 5 2018 10:35 PM UTC

}// 131/140

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ximavus

function u(t) {

for(X=60;X--;)for(Y=60;Y--;){x.fillStyle=R(d=S(t+X*Y)*127+127,d,d);x.fillRect(X*32,Y*18,32,18)}

Dec 4 2025 3:26 PM UTC

}// 95/140

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Multiplication grid

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katkip

function u(t) {

c.width^=0;f=(X,Y,d)=>{if(d>30)x.arc(X,Y,d,0,7),f(X-d*C(d+t),Y,d/2),f(X,Y-d*S(d+t),d/2),x.stroke()}
f(960,540,300)

Dec 30 2018 12:21 PM UTC

}// 114/140

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Perfectly moving circles inside a circle #recursive

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mxfh

remix of d/2181 by u/veubeke

function u(t) {

t?v=Math.random()*8:x.scale(8,8,_=[])
x.clearRect(e=_[i=~~v]?_[i]+=v%.1:_[i]=1,$=i*16,990,15)
x.fillText(e>170?'🐌finished':'🐌'+~v,e,$+14)

Mar 18 2017 2:57 AM UTC

}// 137/140

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taking bets now ;)

u/veubeke

Amazing! and finally a good use for clearRect
u/sfz

had to e*=33 for my a.d.d... very cool!
u/iverjo

#random

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eruonna

remix of d/2511 by u/eruonna

function u(t) {

a=[0,-1,0,1,0]
if(t){if(i>=0){d=(p[i--]+1)%4;p.push(d);j++;b+=a[d];c-=a[d+1];x.lineTo(b,c);x.stroke()}else i=j}else{p=[0];i=j=0;b=380;c=830}

Apr 17 2017 9:30 PM UTC

}// 140/140

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denser version

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jellyedwards

function u(t) {

c.width=400;for(i=5;i--;x.fillRect(0,100+i*10,400,1))x.font='25px A';for(m=t*5|0;m--;x.fillText('🎵',-t*99+m*25,100+10*(m%9>4?n:4-n)))n=m%5

Mar 28 2020 7:30 PM UTC

}// 138/140

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Philip #glass

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katkip

remix of d/14792 by u/Xen

function u(t) {

t*=2;for(i=999;i--;)x.fillStyle=R(256-i%t*i),x.fillRect(i,i^i*t,6,6)

Jun 28 2019 6:00 PM UTC

}// 68/140

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recursive

function u(t) {

t*=256
for(X=120;X--;)
for(Y=68;Y--;x.fillRect(X<<4,Y<<4,16,16))a=Math.atan2(Y-34,X-60)*326,x.fillStyle=R(a+t&255,a-t&255,(X*X+Y*Y)*5-t&255)

Mar 1 2017 10:33 PM UTC

}// 140/140

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u/sigveseb

nice!
u/iverjo

This looks like a combination of 2-3 effects. I'm impressed!