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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magna

remix of d/22374 by u/magna

function u(t) {

for(i=3e3;i--;x[`${t&1?'clear':'fill'}Rect`](-s/2,-s/2,s,s))X=i&63,Y=i>>6,s=S((X&Y)%t+t)*20,x.setTransform(k=C(A=.79),z=S(A),-z,k,X*30,Y*30)

Apr 6 2021 9:53 PM UTC

}// 140/140

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kimeiga

remix of d/16584 by u/f8f82804

function u(t) {

t?s=(c.width^=onmousemove=_=>b=_.x)/4:a=b=1.57;for(q=r=a;(q-=1/s)>-a;x.lineTo(C(q+b/99)*S(r-t)*s+2*s,(C(t+=1/s)*C(r-t))*s+s))r+=a;x.stroke()

Mar 22 2021 11:05 PM UTC

}// 140/140

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I would love to be able to understand this but I sincerely don't. #interactive #mouse #remix

u/f8f82804

Great golfing!

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KilledByAPixel

function u(t) {

A=_=>T=S(T*7)||1
B=_=>R=(R*9||.9)%1
for(i=2e3;i--;)x.fillRect(i,t*60,i-960?i<960?A():B():9,1)

Oct 18 2023 4:26 PM UTC

}// 93/140

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Two Randoms - demo of two tiny ways to generate random numbers

Show more comments…
u/danny@hille.dk

Cool, but both A and B uses a global method (tan or rgb), besides B is the same length as D=_=>Math.random()
u/rodrigo.siqueira

I understand that in this case, A and B are short methods used to obtain predictable (deterministic) results from a pseudo-random number generator (PRNG), unlike the Math.random() method.
u/KilledByAPixel

A uses Math.sin to get values between -1 and 1, B just uses % and returns between 0 and 1. Both have some artifacts but are random enough for many things.
u/KilledByAPixel

danny, you can't control the seed to Math.random() that makes it unusable for many applications. These do use dwitter defines but also can work just as well without, especially method B.
u/Joachim

Interesting... the left seems too uniform while the right looks slightly horizontaly biased. I think B() will be the most helpful for me, thanks!
u/danny@hille.dk

ooooh nice! Thanks for breaking that down 4 me :-)
u/rodrigo.siqueira

Warning: R=0.5; R=(R*9||.9)%1; // In this seed case (R=0.5), the result will always be 0.5 (it's fixed point, "a value that does not change under a given transformation").
u/cantelope

#RNG

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vinca

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㴰ⱪ㴷攳㭪ⴭ㬩筦潲⡶慲⁘㵪⼷ぼ〬夽樥㜰Ɱ㵲㴰Ⱪ㵓⡴⤻渼ㄹ☦爪爫椪椼㐻渫⬩愽爪爭椪椫⡘ⴷ〩⼲㔬戽㈪爪椫⡙ⴳ㔩⼳㔬爽愬椽戻砮牥捴⠲攳⩘⼱〰ⰱ攳⩙⼷〬㌪測㌪温絸⹳瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Apr 30 2019 2:11 PM UTC

}// 136/140

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u/Jezza

Wow!
u/13thptr

#mandelbrot

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KilledByAPixel

remix of d/27935 by u/danny@hille.dk

function u(t) {

for(c.width=A=99;A;)(t+R*A/50-R^R)%5?R+=.1:x.fillRect(A,28-S/R,S++<20||(S=-20,--A,R=1),.3)

Jun 9 2023 4:56 PM UTC

}// 90/140

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Smol Wolf 🏌️🐺

u/Joachim

Impressive!
u/tomxor

So smol!
u/magna

wow

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fervour

function u(t) {

e=16;d="쀃老蟠࿰ᆈῸᆈ鷙禞妚忺렝찳";for(i=0;i<e;++i)for(j=0;j<e;++j){a=i+j*e;if(((d.charCodeAt(~~(a/e)%e)>>(a%e))&1)!=1)x.fillRect(i*68,j*68,68,68)}

Mar 28 2018 10:30 AM UTC

}// 138/140

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Odog8

function u(t) {

t?x.fillStyle=R(r=Math.random,150*r(X=r(Y=r()*99)*500)):c.width=500
for(i=4e4;i--;x.fillRect(X+=6*r()-3,Y+=6*r()-3,t<3,3-t));

Oct 27 2022 12:54 AM UTC

}// 125/140

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A Fractal Forest

u/Odog8

aghhh little white gaps still appear occasionally

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katkip

function u(t) {

for(c.width=i=800;i--;x.fillStyle=`hsl(${i+t*50},99%,50%`)x.fillRect(S(i/99+t/1)+1/(z=i/200)-(w=z*400)/2,(99+S(i/50-t)*60)/z+200,w,t/z);

Jul 30 2018 10:34 AM UTC

}// 136/140

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The magic carpet

u/d0n.key

That's a pretty gay carpet you got there. ( I like it though :D )
u/katkip

XD
u/lionleaf

#rainbow #carpet
u/username

#best dweet for me definitely
u/username

#music

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neimad

remix of d/17705 by u/neimad

function u(t) {

for(c.width|=k=i=540;i--;x.strokeRect(960-i*2,k-i,i*4,i*2))n=i/7,x.setLineDash((t*k+1e5/i)%50>C(t/i)*100?[C(t/i)*n,n,0]:[S(t/n)*i,0,n])

Feb 22 2020 11:52 PM UTC

}// 135/140

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numbers are funny

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rodrigo.siqueira

remix of d/29603 by u/taupelink

function u(t) {

f=(u,v,m=16)=>(m?f(u,v,m>>1)-m:u%v-v/2)**2/5;g=n=>f(X,n)+f(Y-3,n)&5;for(i=1e4;i--;x.fillRect(83*X+212,80*Y-416,g(18),t<4))X=i*t%18,Y=X*i%24

Mar 4 2024 1:09 PM UTC

}// 139/140

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Symmetric wave overlap interference