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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ArthurThuczsec

remix of d/25702 by u/Salko75

function u(t) {

eval(unescape(escape`𨰮𫱮𨱬𪑣𪰽𩐽🡻𨐽𫡥𭰠𠑵𩁩𫱃𫱮𭁥𮁴𚀩𞱯👡𛡣𬡥𨑴𩑏𬱣𪑬𫁡𭁯𬠨𚐻𫰮𨱯𫡮𩑣𭀨𨐮𩁥𬱴𪑮𨑴𪑯𫠩𞱯𛡦𬡥𬑵𩑮𨱹𛡶𨑬𭑥👴𧡥𛡸𞱯𛡤𩑴𭑮𩐮𭡡𫁵𩐽𭁞𩐮𮐻𫰮𬱴𨑲𭀨𚐻𫰮𬱴𫱰𚀱𚐻𫰮𭁹𬁥🐧𬱡𭱴𫱯𭁨𙱽`.replace(/u../g,'')))

Jun 24 2022 4:28 PM UTC

}// 126/140

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click canvas, X=frequency, Y=detune

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maple3142

function u(t) {

c.width=1920
for(i=0;i<9*(S(t/2)+1);i++)
x.fillRect(600*(C(t*2)+1)+i*100+(S(t*7)+1)*300,400*(S(t*5)+1),50,200*C(t*3))

Oct 15 2018 3:56 PM UTC

}// 117/140

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tomxor

remix of d/21783 by u/tomxor

function u(t) {

A=t?A.map(a=>(s=u[a>>4]^=1,x[s?'fillRect':'clearRect'](a>>6,a&1008,16,16),a=a+2*s+1&~4,a+=a&1?a%4-2<<10:a%4-1<<4)):[54675,69010,69233,54896]

Mar 2 2021 11:27 PM UTC

}// 140/140

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Multi #langton's #ant

u/tomxor

Squashed each ant into a 16bit bit field, [X,Y,D] = 0b 111111 111111 0111. These ants were generated with: X=7,Y=7,D=0,[[-X,-Y,3+D],[+Y,-X,2+D],[+X,+Y,1+D],[-Y,+X,0+D]].map(([X,Y,D])=>X+60<<10|Y+32<<4|D%4<<0)
u/mark1626

This is incredible. Just one question, how does s = u[a >> 4] ^= 1 work?
u/tomxor

Thanks :) a>>4 is the cell index of a 64x64 grid. the lower 4 bits are for the ant's direction so shifting them off to the right leaves only the 12 X and Y bits (see above). u is just an object, so all of these indicies will be undefined initially, but undefined is falsey and bitwise operators coerce falsey into 0, i.e undefined ^ 1 == 0 ^ 1 == 1, in otherwords XOR just treats all of the initial cell values as 0. Using the assignment version ^= means we toggle each cell between 0 and 1 each time an ant passes through it (which is part of the langton ant rules).

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Xen

function u(t) {

for(c.width=a=99;--a;x.arc(47+C(a+t*9),25+S(a+t*8),a,-t,0));x.fill('evenodd')

Dec 31 2017 6:43 PM UTC

}// 77/140

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spirally wavey something...spavey? wiral? i'll just call it fred or something till you pick a better name

u/joeytwiddle

spwirgle

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taupelink

remix of d/19451 by u/taupelink

function u(t) {

f=(x,y=1)=>S(x)<y?C(x)*f(x+.1,y*.7):y;for(i=z=1e3;i--;)X=(r=Math.random)()*21,Y=r()*16,x.fillRect(X*90,Y*70,f(X&Y)*f(z/X/Y)<f(X|Y)*f(X%Y),1)

Jul 20 2020 9:36 PM UTC

}// 140/140

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d/19466

u/rep_movsd

Amazing

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rodrigo.siqueira

remix of d/23332 by u/rodrigo.siqueira

function u(t) {

t=S(t*3)*8
for(X=c.width=99;X--;)for(Y=99;Y--;x.fillRect(Y,55-X,1,1))o=255-X*Math.hypot(X-45+t*t,Y-48+t*6),s=C(t)/9-.4,x.fillStyle=R(-o/s,o)

Jul 16 2021 12:11 PM UTC

}// 140/140

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Bouncing Ball #bounce #ball

u/Xen

nice!!
u/donbright

funny

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danny@hille.dk

remix of d/23879 by u/danny@hille.dk

function u(t) {

eval(unescape(escape`󮬽󨼮󭽩󩍴󪌽󭼽󜜸󜌬󮌮󩭩󫍬󤽴󮝬󩜽󙽮󨝶󮜧󞽦󫽲󚍭󟜲󩜴󞽭󛜭󞽲󟜨󨜽󦌯󞜰󛜱󚜪󨜫󚍢󟝙󛼹󜌭󜜮󝌩󚭢󛍤󟜭󛬱󛍺󟝓󚍡󛽤󚭲󚽴󚬴󚜭󠼨󨬯󩌫󭌪󝼩󚝸󛭦󪝬󫍒󩝣󭌨󦌽󫜥󭼬󦜽󫜯󭼬󠼨󦌯󞜭󤼨󦜯󜼹󛝴󚬳󚝞󦜯󞜭󠼨󦌯󜼳󚽴󚬴󚜫󭌪󜼩󛽺󚼱󛍺󚬮󝌩󒬻`.replace(/u../g,'')))

Sep 25 2021 2:16 PM UTC

}// 135/140

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composite water ripple + refraction effect remix

u/danny@hille.dk

z=c.width=w=180,x.fillStyle='navy';for(m=2e4;m--;r=(a=X/90-1)*a+(b=Y/90-1.4)*b,d=-.1,z=S(a/d*r+t*4)-C(b/d+t*7))x.fillRect(X=m%w,Y=m/w,C(X/9-S(Y/39-t*3)^Y/9-C(X/33+t*4)+t*3)/z+1,z*.4)
u/Odog8

Looks like a snes demoscene-to-be!
u/danny@hille.dk

#water

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46uuuu

function u(t) {

for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200)
// #default

May 20 2026 7:04 PM UTC

}// 70/140

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Default but without clearing cv #default

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Xen

remix of d/28165 by u/danny@hille.dk

function u(t) {

for(X=c.width=128;X--;)for(Y=72;Y--;x.fillStyle="#"+(t*57|0))x.fillRect(X,Y,.8,(X-64+S(t-Y/32+S(t+X/64))*16+Y-36+C(t+X/32*C(t+Y/16))*24)/16)

Jul 23 2023 1:28 PM UTC

}// 140/140

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quick play

u/katur

nice!!
u/Xen

thank you 🥰

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Jezza

function u(t) {

c.width=1920;d=-2.1;e=1.9;for(i=l=j=t;i<9e3;i++)k=S(d*l)+C(t)*C(j*d),m=S(e*j)+S(t)*C(l*e),j=k,l=m,x.fillRect(960+j*400,540+l*250,2,2)

Dec 30 2017 5:02 AM UTC

}// 133/140

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Newbie here. Would have loved to add some alpha but no room :)

Show more comments…
u/Jezza

Heavily inspired by: http://paulbourke.net/fractals/clifford/
u/sigveseb

A trick for alpha is to fillrect with a width < 1 ;)
u/joeytwiddle

You can save 3 chars with: c.width|=e=1.9 (doesn't seem for work for negative d)
u/joeytwiddle

I did you a low-res remix: https://www.dwitter.net/d/4842
u/Jezza

Thanks for the tips and this remix!
u/joeytwiddle

jonathan_b has also done a remix: d/5348