Dweets by u/tomxor

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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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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tomxor

function u(t) {

t?S=u[X+u+Y]^=1:X=Y=D=64;D=D+2*S+1&3;D&1?X+=D-2:Y+=D-1
x.fillStyle=R(!S<<8);x.fillRect(X*8,Y*8,8,8)

Feb 27 2021 5:42 PM UTC

}// 99/140

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Micro #langton's #ant

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tomxor

remix of d/21734 by u/tomxor

function u(t) {

b='氀氀氀氀氀氀渀渀渀渀漀漀澀柀柠揸懿惿怿怏';eval(unescape(escape`𩡯𬠨𪐽𝠷𜠻𪐭𛐻𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱴𚠸𜀫𦐪𝱽𘀹𞐥𝐰𙑠𚑢𛡣𪁡𬡃𫱤𩑁𭀨𦐽𪐾🠵𚐾🠨𦀽𪐦𜐵𚐦𜐦𙡸𛡦𪑬𫁒𩑣𭀨𚁩𙠱𝠿𝀵𚱘𞠷𜰭𦀩🀼𝀬𜠴𚱙🀼𝀬𜐶𛀱𝠩`.replace(/u../g,'')))

Feb 21 2021 5:43 PM UTC

}// 133/140

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#retro #atari #GEM "Rainbow" #TOS 1.04 logo

u/tomxor

#pixelart
u/tomxor

Traced from a real TOS ROM running on Hatari to get the pixels right.
u/magna

Lovely!
u/New_Core

nice

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tomxor

function u(t) {

for(i=672;i--;)'氀氀氀氀氀氀渀渀渀渀漀漀澀柀柠揸懿惿怿怏'.charCodeAt(Y=i>>5)>>(X=i&15)&1&&x.fillRect((i&16?45+X:73-X)<<4,24+Y<<4,16,16)

Feb 21 2021 5:42 PM UTC

}// 115/140

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#retro #atari #GEM #TOS logo

u/tomxor

#pixelart

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tomxor

remix of d/21704 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𮁛𩠽𙱦𪑬𫁒𩑣𭀧𧐨𜀬𜀬𨰮𭱩𩁴𪀽𜐸𜀬𪐽𫀽𜐵𜰰𚐻𪐭𛐻𮁛𩡝𚁘𚠶𛁙𚠶𛀱𚱋𛀵𚐩𦀽𪐥𞐰𛰳𛁙👩𛰹𜀬𡠽𭀪𝐸𛑩𛱬𛁁👘𚰸𚡓𚁾𡠯𞐫𦐯𞐩𛁋👆𙐱𛰴𚰡𘐨𠐯𜐷𛐱𝠯𜐸𯁙𛰴𛐱𜀯𝑼𠐫𜠦𜠩𛰲𛁸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𪐪𜐲𜁽𘀹𞐥𙁻𢰪𞐹𯐥𨀻`.replace(/u../g,'')))

Feb 18 2021 2:32 PM UTC

}// 140/140

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#retro #crt #default @60Hz-ish

u/Odog8

Beautifulllll
u/Qwitter

cool!
u/neimad

This is amazing.
u/aleamb

superb!
u/magna

YES!!

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tomxor

remix of d/12335 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𮁛𩠽𙱦𪑬𫁒𩑣𭀧𧐨𜀬𜀬𨰮𭱩𩁴𪀽𜐸𜀬𪐽𫀽𜐵𜰰𚐻𪐭𛐻𮁛𩡝𚁘𚠶𛁙𚠶𛀱𚱋𛀵𚐩𦀽𪐥𞐰𛰳𛁙👩𛰹𜀬𡠽𜐫𭀪𭀭𪐯𫀬𠐽𦀫𞀪𤰨善𛰹𚱙𛰹𚐬𢰽𜐭𡠥𜐭𘐨𠐯𜐷𛐱𝠯𜐸𯁙𛰴𛐱𜀯𝑼𠐫𜠦𜠩𛰲𛁸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𪐪𜐲𜁽𘀹𞐥𙁻𢰪𞐹𯐥𨀻`.replace(/u../g,'')))

Feb 18 2021 2:10 PM UTC

}// 140/140

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#retro #crt #default

u/tomxor

With subpixel anti-aliasing :) ... ok that was an accident... but atand back and look at those cute RGB fringes!

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tomxor

function u(t) {

// Xorshift 32
R ^= R << 13
R ^= R >>> 17
R ^= R << 5

// U(0,1)
f = (R>>>0)*2**-32
// Plot
x.fillRect(f*2e6%2e3,f*1e3,9,9)
// Seed
R = R||1

Feb 13 2021 12:31 PM UTC

}// 140/140

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#Xorshift 32 #PRNG

u/tomxor

I felt that there are too many extremely unecessarily long examples of xorshift32 implementations out there, with lots of fluff around the outside. It's a very nice and simple little PRNG and this is all the code you need to turn it into a unit interval (i.e the type and range you get from Math.random()): (x>>>0) * 2**-32. This conversion method is far from perfect and results in some bias, but so does the PRNG itself...

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tomxor

remix of d/21621 by u/tomxor

function u(t) {

for(c.width&=m=i=8320;i--;x.fillRect(X=i&127,Y=i>>7,1,f(X/m+.01,Y/m)))f=(x,y,n=42)=>--n&&y/C(x+n/2+t)<2?f(x*x-y*y-1.5,2*x*y,n):n/16

Feb 8 2021 3:43 AM UTC

}// 131/140

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Something #creepy #fractal :/

Show more comments…
u/tomxor

I find this really unsettling for some reason !
u/katkip

amazing
u/DataMeta

whoa
u/Qwitter

its too good
u/iverjo

This somehow reminds me of the flesh-eating plant (The Angostura) in Moomin
u/sigveseb

So many tentacles!

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tomxor

remix of d/21620 by u/tomxor

function u(t) {

for(c.width&=m=i=8320;i--;x.fillRect(X=i&127,Y=i>>7,1,f(X/m+.01,Y/m)))f=(x,y,n=42)=>--n&&y/(1.1+S(2*C(n+2*t)))<7?f(x*x-y*y-1.5,2*x*y,n):n/16

Feb 8 2021 3:37 AM UTC

}// 140/140

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#bubbley #coral #fractal

u/DataMeta

cute #organic

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tomxor

remix of d/21610 by u/rodrigo.siqueira

function u(t) {

for(c.width&=m=i=8320;i--;x.fillRect(X=i&127,Y=i>>7,1,f(X/m+.01,Y/m)))f=(x,y,n=42)=>--n&&y/(1.1+S(x+2*S(n+t)))<5?f(x*x-y*y-1.5,2*x*y,n):n/16

Feb 8 2021 3:29 AM UTC

}// 140/140

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#wavey #plant #fractal

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