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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Current theme challenge: #Food

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Xen

function u(t) {

t?X.push([Date.now()/t%2e3,0]):X=[];for(i=X.length;i--;x.fill())x.beginPath(x.fillStyle=R(X[i][1]/6)),x.arc(X[i][0]-=T(i),X[i][1]+=5,99,0,7)

Sep 25 2017 8:42 PM UTC

}// 140/140

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Somewhere between blood cells and a lava lamp :-) Shoutz to Alien.

u/alien

bloooooooooood
u/Xen

#blood

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rodrigo.siqueira

remix of d/12959 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(var i=4e3;i=i-1;){
X=S(i)+S(K=i*.88)/2+2*S(F=2*i+t)
Y=C(i)+C(K)/2-2*C(F)
x.clearRect(960+X*130,550+Y*130,6,6)
}

Apr 6 2019 2:00 AM UTC

}// 139/140

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The Trefoil Knot. Created using a parametric equation from knot theory.

u/Qwitter

I like how the projected crossings allow you to view the height ambiguously: then, I can see this knot as not being knotted at whim.

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384.cz

function u(t) {

for(j=2e3;j--;x.fillStyle=`#${j%9}73`)x.fillRect(t=S(t)*j,t=S(t)*j,99,99)

Dec 16 2023 6:47 PM UTC

}// 73/140

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#wild #noiser

u/384.cz

#noise

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rodrigo.siqueira

remix of d/28722 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()`
for(a=b=t,i=5e4;i--;b=b/1.15-C(a*3),a+=(i/b&i%2)*3.1-b*S(a/1.8)/7-a*a/4.2)x.fillRect(2600-a*3e3,410-b*270,.1,t<1)

Oct 19 2023 9:36 PM UTC

}// 139/140

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Volumetric texture #spiral

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rodrigo.siqueira

remix of d/28757 by u/rodrigo.siqueira

function u(t) {

for(a=b=t,i=8e4;i--;a+=(r=i/b&i%2)*3.4-b*S(a*2.1)/8-a*a/4.21,b=b/1.3-C(a*3))x.fillRect(b*600+1600,2400-a*3000+b*330,.1,t<2)

Oct 30 2023 2:26 PM UTC

}// 123/140

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Fractal dome #spiral

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iverjo

function u(t) {

a=Math.abs;w=c.width=64;for(i=-1;i++<2304;)d=a(i%w-32)+a(i/w-19),z=d*6-t*3,x.fillStyle=R(i*S(z),i*S(z-2),i*S(z-4)),x.fillRect(i%w,0|i/w,1,1)

Sep 5 2016 12:49 PM UTC

}// 140/140

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#codercolors

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andrea270872

remix of d/12771 by u/andrea270872

function u(t) {

c.width|=K=1e3
A=[(t*97%11-5)*K,(t*89%13-6)*K,0]
P=t?P.map(([i,j,z,v])=>[i,j,(z+1)%99,x.fillRect(K+i/z,500+j/z,z,z)]):[A]
P[K]||P.push(A)

Mar 15 2019 7:44 PM UTC

}// 137/140

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Build-up!

Show more comments…
u/Xen

love it
u/pavel

103 for(c.width|=K=k=1e3;k--;z>0&&x.fillRect(K+(k*97/60%11-5)*K/z,500+(k*89/60%13-6)*K/z,z,z))z=(60*t-k)%99
u/pavel

Looks like the code you started with used Math.random at each step which made the ultimate position of each square at time 't' impossible to determine directly. Switching to instead use any function of just t makes it quite simple so there is no need to initialize stuff at time 0 and keep it updated.
u/pavel

I learned that in d/11421 to save chars and make d/11424
u/andrea270872

great. thanks very much
u/andrea270872

In my head I was thinking also that t*97%11 is a pseudo-random generator...
u/katkip

Satisfying

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katkip

remix of d/9872 by u/katkip

function u(t) {

if(!t)p=0;{for(i=0;i<3;i++)x.lineTo(-540+i*2+S(p)*540+p*1,540+C(p)*540+C(p));x.stroke();p+=9}

Sep 16 2018 8:55 AM UTC

}// 93/140

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ciaccodavide

remix of d/20674 by u/ciaccodavide

function u(t) {

c.width|=1
for(i=0;i<19;i++)
x.moveTo(960+C(t*i/10)*39*i,530+S(t*i/10)*19*i),
x.arc(960+C(t*i/10)*39*i,530+S(t*i/10)*19*i,3*i,0,9)
x.fill()

Nov 18 2020 9:45 AM UTC

}// 139/140

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Voidcentrism

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Agnes

remix of d/22826 by u/Agnes

function u(t) {

P=p=>p+C(t)+t%6.3;[...Array(2e3).keys()].map(e=>e).sort(e=>C(P(e))).map(e=>{x.fillStyle='#'+e;x.fillRect(860+200*S(P(e)),e,50*C(P(e)),-99)})

May 20 2021 10:00 AM UTC

}// 140/140

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Slightly more interesting depth-sorted spinning tower

u/Agnes

I just realised there's literally no reason to do mod 2*pi at the end of the P function, wow
u/Agnes

And there's a map(e=>e) in there! Must have been asleep when I programmed this.