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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lionleaf

remix of d/127 by u/iverjo

function u(t) {

c.width=1920;for(i=0;i<999;i++)x.fillStyle=R(i/3,0,255),x.fillRect(100+S(i*(S(t)+3)/90)*2000,100+i,90*C(t),90)

Apr 14 2016 4:33 PM UTC

}// 110/140

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Xen

function u(t) {

for(c.width|=i=150;i--;)x.stroke(),x.beginPath(),
x.arc(860+200*S(t+i/2),S(9*i),t*i/2,0,7)

Jun 17 2018 9:52 PM UTC

}// 90/140

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lonestar108

function u(t) {

eval(unescape(escape`景爨椽〻椼ㅥ㐻椫⬩砮晩汬剥捴⡷㴹㘰⭩⼲〪匨椯㔰⬵⩴⤫匨椯㤹⤪椯㤬㔴〫椯㈰⩃⡩⼵〫㌪琩⭃⡩⼷㜩⩩⼸ⰳⰳ⤬砮晩汬却祬攽恨獬⠤筩⼵〫琪㤹紬㤹┬⑻㔰⬲㔪匨椯㌰〩紥⥠`.replace(/u([^D].)/g,'$1%')))

Mar 21 2024 5:09 AM UTC

}// 129/140

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tendrils

u/Joaozin003

Don't do this

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hirth27

function u(t) {

for(c.width=i=2000;i--;x.fillRect(970+r*C(a),550+r*S(a),8,1))j=i>>9,a=i/1+S(j+t),r=(j*1+t*22)%900*(1+S(a*8+j*t)/3),x.fillStyle=R(r/1,9,j*27)

Jul 5 2026 2:23 AM UTC

}// 140/140

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joeytwiddle

remix of d/531 by u/BriSeven

function u(t) {

for(i=600;i--;x.fillRect(X=X+400+c*600>>1,Y=Y+1076*(1-c&1)>>1,4,4),H=H+400*(c+t)>>2)c=(i*t^i)%3,t?x.fillStyle=`hsl(${H},50%,50%)`:X=Y=H=0

Aug 21 2017 4:02 PM UTC

}// 137/140

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Sierpinksbow

Show more comments…
u/joeytwiddle

i*t^i is a poor but short PRNG
u/sigveseb

Upvote for the colors
u/BriSeven

fantastic
u/joeytwiddle

I forgot to brighten the dull colors. Try 90%,60%
u/donbright

my new favorite sierpinski
u/joeytwiddle

Big brother: https://www.dwitter.net/d/3458
u/joeytwiddle

Another with colour: d/2668
u/iverjo

#sierpinski
u/CocoMeister

#fractal
u/joeytwiddle

#rainbow

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username

remix of d/3234 by u/artfarnaa

function u(t) {

for(i=(w=c.width=1e3),x.fillRect(0,0,w,w);i--;)x.clearRect(w/2+S(p=(q=Math.sqrt(i*2)*9)/(2+(v=T(t**2/i))/30)+v)*q,290+C(p)*q,4,4)

Jun 1 2019 7:51 PM UTC

}// 129/140

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#randomremix nr. 1 - watch the chaos unfold from the center

u/Xen

nice

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Xen

remix of d/17403 by u/rodrigo.siqueira

function u(t) {

for(i=1e3;i--;x.fillStyle=R(Y+Z,Y,X,.01))t<i&&x.fillRect(X=C(z=S(t*i**8)*7+4)*i**1.5,Y=300+S(z/2)*i*t,Z=i*S(t),Z),x.strokeRect(X,Y,Z,Z)

Jan 29 2020 10:56 PM UTC

}// 135/140

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Bleek #art

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greentec

function u(t) {

a=255;for(i=0;i<1920;i+=5)for(j=0;j<1080;j+=5)r=(a*C(.0174*i))%255,g=(a*S(.0174*j))%255,b=(r*g)%255,x.fillStyle=R(r,g,b),x.fillRect(i,j,5,5)

Jul 20 2016 11:49 AM UTC

}// 140/140

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u/iverjo

Here's a version that draws only once: if(!t){a=255;for(i=0;i<1920;i+=5)for(j=0;j<1080;j+=5)x.fillStyle=R(r=(a*C(.0174*i))%a,g=(a*S(.0174*j))%a,r*g%a),x.fillRect(i,j,5,5)}
u/greentec

Oh, Thanks! It was very helpful.

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@noel

function u(t) {

eval(unescape(escape`󩭯󬬨󪬽󛜱󞽪󟌨󭼽󜬵󝜩󞽩󚼫󚝦󫽲󚍹󟜭󜜫󜬪󪬫󚼯󭼬󪜽󛜱󞽩󟍷󞽩󚼫󚝻󪼽󛜱󚼲󚭩󛽷󒭤󟝍󨝴󪌮󬽱󬭴󚍫󚭫󚽹󚭹󚜊󨜽󣝡󭍨󛭡󭍡󫬲󚍹󛍫󚜊󮬽󭼪󠼨󨜩󛽤󚽴󚭷󧬨󭼪󤼨󨜩󛽤󚽴󚭷󚜊󮌮󩭩󫍬󤽴󮝬󩜽󤬨󩌬󮬦󭼬󮬦󭼩󒭸󛭦󪝬󫍒󩝣󭌨󪜬󪬬󜜬󜜩󯜻`.replace(/u../g,'')))

Jun 1 2023 6:02 PM UTC

}// 133/140

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Stereographic Projection

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u/@noel

My first dwitter. I reduced the drawn area, but it still runs very slow
u/@noel

for(j=-1;j<(w=255);i++)for(y=-1+2*j++/w,i=-1;i<w;i++){k=-1+2*i/w d=Math.sqrt(k*k+y*y) a=Math.atan2(y,k) z=w*C(a)/d+t*w^(w*S(a)/d+t*w) x.fillStyle=R(d,z&w,z&w) x.fillRect(i,j,1,1)}
u/@noel

In java this runs smoothly.
u/@noel

A bit of a disappointment. I am going to try to do this with bigger rectangles now.
u/Xen

nicely done! welcome to the dwitter family
u/KilledByAPixel

fillStyle can be slow when called this often (60,000+ times per frame), you can make a faster/smaller version in grayscale by removing the fillStyle and doing this x.fillRect(i,j,1,(z&w)/w)
u/danny@hille.dk

uncompressed using grayscale and some other golfing tricks ->c.width=w=255;for(m=4e4;m--;x.fillRect(i,j,((C(a=Math.atan2(y,k))*w/d+t*w^S(a)*w/d+t*w)&w)/w,1))i=m%w,j=m/w,d=Math.hypot(k=i/w-.5,y=j/w-.3)
u/danny@hille.dk

Great first Dweet, by the way :-)
u/@noel

u/danny@hille.dk Thank you. Your solution is really nice. I am playing right now with it.

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rodrigo.siqueira

remix of d/20957 by u/KilledByAPixel

function u(t) {

for(k=c.width|=w=60;n=k--/w|0;x.fillRect(S(n**(k%w)),k%w/5|x.rotate(S(t*5)-2),1,1))x.setTransform(k%2?(v=n%9):-v,0,0,v,n*w,(n*n+t)*360%2e3)

Dec 11 2020 6:39 PM UTC

}// 139/140

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Flock of flying birds (remix of "snow fall").