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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Xen

remix of d/19924 by u/masang

function u(t) {

for(c.width|=i=2e3;i--;x.fillStyle=`hsl(${t*i},99%,40%)`)
x.fillRect(i*2+t*t%9,0,1,2e3)

Sep 12 2020 8:27 PM UTC

}// 87/140

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golf and play

u/masang

sugoku sugoi desune! owesome!

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joeytwiddle

remix of d/3598 by u/joeytwiddle

function u(t) {

r=Math.random;if(t%2<.7){c.width=199
for(X=55;X<137;X++)~X&64||r()<.5?x.fillRect(X,9,1,78):0
x.fillText(Object.keys(this)[r()*215|0],55,99)}

Jan 22 2022 2:11 PM UTC

}// 140/140

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Little #barcode remix

u/joeytwiddle

2024/11/18: Object.keys(window).length === 256 on Firefox (249 in Chrome)

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anishasl

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 */

Feb 23 2017 3:59 AM UTC

}// 122/140

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ximavus

function u(t) {

t?n&1?(n*=3,n++):n/=2:x.fillText(n=~~(Math.random()*99+1),250,40,c.width=568,x.font='1cm a')
n==1?n=0:x.lineTo(t*400,320-n)
x.stroke()

Mar 15 2026 12:18 PM UTC

}// 134/140

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Collatz graph (the n variable is the seed)

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katkip

remix of d/21013 by u/Steckerleiste

function u(t) {

for(z=4*t,v=99*(C(z/4)+1),x.fillStyle=`${R(v,v,v)}`,j=0;j++<509;)i=j/7<<6,n=z/9+j%7*.9+i/250,x.fillRect(S(n)*i*t+960,C(n)*i*t+540,j/t,j/t)

Dec 16 2020 2:57 PM UTC

}// 138/140

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cantelope

function u(t) {

eval(unescape(escape`𪀽𨰮𭱩𩁴𪀽𞐹𛁐👴🱐𛡭𨑰𚀨𭠬𪐬𨐩🐾𮱶𙠦𮀮𩡩𫁬𤡥𨱴𚁘👩𙑨𛁙👩𛱨𯀰𛀱𛀱𚐻𬡥𭁵𬡮𚀨𭠫𚁡𦱩🡨🱩𛑨𞡷𛑨𚱩𧐫𨑛𪐼𭰭𪀿𪐫𪀺𪐭𭰫𪁝𚱡𦱩🱩𛐱𞡷𛐱𧐫𨑛𪐫𜑝𚐯𜐮𝐩𯀰𚐥𜡽𚐺𠑲𬡡𮐨𭰽𝐵𜐳𚐮𩡩𫁬𚀩𛡭𨑰𚀨𭠬𪐩🐾𚀨𪐪𚠲𛠵𚑼𜀩𙐲𚐻`.replace(/u../g,'')))

Jun 10 2020 6:17 AM UTC

}// 140/140

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https://codegolf.dweet.net/a/447

u/nburn42

Awesome

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pavel

remix of d/20898 by u/cantelope

function u(t) {

for(c.width=i=640;i--;T=!T&&!x.beginPath(x.stroke()))j=i/16-T*i&30,r=(j+4)/12<<6,x.arc(320+r*C(a=j/1.91+t),180+r*S(a),i&30?0:32,0,7)

Dec 4 2020 3:01 AM UTC

}// 132/140

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Metatron's Cube

Show more comments…
u/pavel

Golfed this one a little bit :) #symmetry
u/pavel

i=[4 bits for start circle index][4 bits for end circle index offset from start circle][1 bit to decide start vs end]
u/pavel

That's 2**9=512 which is too small for power-of-two circle sizes but start clicle index wraps around so larger i is only redundant.
u/pavel

end-circle-offset == 0 is easy to check and means start and end are same circle, so draw that circle.
u/pavel

Otherwise draw the current circle with radius 0 which is same as lineTo.
u/pavel

T=!T&&!x.beginPath(x.stroke()) starts/strokes the path every two circles.
u/pavel

Here is a version before all the bit hacking for(c.width=640,i=16;i--;)for(j=16;j--;x.beginPath(x.stroke()))for(k=2;k--;)q=(i+j*k)%16,r=((q+2)/6|0)*64,x.arc(320+r*C(a=Math.PI/3*q+t),180+r*S(a),!j*32,0,7)

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KilledByAPixel

function u(t) {

for(X=j=2e3;--j;x.fillRect(X*1500+1250,Y*800+240,.5,1))X=X*S--?X*X-Y*Y+(Y=2*X*Y+.5,A):A=T(Y=B=T(S=1e3,T=Math.random)*4-2)*3-2

Apr 12 2020 7:02 AM UTC

}// 125/140

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Pseudo Mandelbrot Creature

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lurifax

function u(t) {

t?0:W=[540];for(i=w=c.width|=0;i--;i>1&&t?W[i]=W[i-i*2/w|0]:W[i]=W[(1+i)%w]+Math.random()*18-9,x.fillRect(i*4%w,W[i],4,2e3))x.globalAlpha=.1

Oct 20 2017 8:06 PM UTC

}// 140/140

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Cloudy mountains?

u/lurifax

First attempt at some parallax landscape, not quite right.

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Xen

remix of d/6352 by u/BackendForth

function u(t) {

for(c.width|=i=96;i--;)for(j=54;j--;x.fillRect(i*20,j*19,g,g))g=9+9*S(((i-t)**2+(j-49)**2)**.3+S(t)*j*Math.atan2(j*t,i-t)+t*29)

Jan 23 2018 5:05 PM UTC

}// 127/140

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