Dweets awesomed by u/KilledByAPixel

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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pavel

function u(t) {

for(x.globalAlpha=.01,x.fillRect(p=2.1,q=C(t%p+p),i=2e3,i);i--;x.clearRect(960+f(C),640+f(S),9,9))f=g=>400*(i?-q:.5/q)*g(t+1.57)+i*S(i)*g(t)

Feb 9 2020 8:25 PM UTC

}// 140/140

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Geometric Algebra - Point on a triangle and its dual line

u/pavel

Inspired by https://youtu.be/tX4H_ctggYo?t=2362
u/pavel

Yikes this lags on my phone bad
u/Qwitter

Legendred!

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KilledByAPixel

function u(t) {

eval(unescape(escape`𨐽𙰧𒡦𫱲𚁩🐲𜀰𞱩🠲𞰩𨐫👠𙁻𪐭𜠰𜀿𙰬𙰺𙰼𩁩𭠠𬱴𮑬𩐽𘡷𪑤𭁨𞠲𜁥𫐻𪁥𪑧𪁴𞠲𜁥𫐻𨡡𨱫𩱲𫱵𫡤𞠧𯑬𪑮𩑡𬠭𩱲𨑤𪑥𫡴𚀱𜰵𩁥𩰬𘱆𡡆𘀵𜀥𛀠𘰰𜀰𜀠𜀩𜀠𜀯𙁻𪐯🐲𯐥𙁻𪑽𙑠𒡴🰰𞡣𛡯𭑴𩑲𢁔𣑌👡𚰧𞱢𨑣𪱧𬡯𭑮𩀭𨱯𫁯𬠺𘰰𜀰𘠾𙰻`.replace(/u../g,'')))

Feb 9 2020 6:07 PM UTC

}// 138/140

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Yuanchuan's single div Sierpinski https://yuanchuan.dev/single-div-sierpinski-…

u/KilledByAPixel

Inspect the canvas and you will see that it is actually a div!

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tomxor

function u(t) {

R?w=128:c.width=w
for(T=S,S=C,C=T,n=0,i=2e4;j=--i/w|i%w*w;n+=~S[i+5]-~S[i-6])x.fillRect(i%w,j%w,R=frame&1,C[j]=R?n>33&n<59?n<46|C[j]:j&!t:n)

Feb 9 2020 1:38 PM UTC

}// 140/140

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#LargerThanLife #Automata Bugs Rule

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u/tomxor

The Larger Than Life "Bugs" rule R5,C0,M1,S34..58,B34..45,NM. You can introduce more entropy by adding spaces to the code (to restart) which causes i&1 to be combined with existing state in the rule's dead space.
u/tomxor

This uses a sliding window to efficiently compute the sum of arbitrary radi Moore neighbourhoods (i.e box blur kernels). It naturally wraps to the next line giving it a kind of twisted toroidal space, which takes less code and is more efficient since it is only necessary to initialise the sliding window once per dimension: O(2n+2r). The FPS is half of what is displayed since every other frame is used to sum the transposed sum of x.
u/tomxor

Other sized w must be a power of 2 and i must be at least w**2+r+1 (r=neighbourhood radius) to allow the sliding window to correctly initialise, otherwise a bad sum will propagate throughout the grid usually causing everything to die.
u/KilledByAPixel

👍 Thanks for the explanation!
u/tomxor

hmm the larger than necessary i seems to be introducing artifacts... change to i=w*w+6 if you want to see the pure rule.
u/katkip

Woow! I remember it from the The Powder Toy game

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angelnm

function u(t) {

with(x){for(n=7;n--;translate(-j*9,j))for(d=9;d--;){translate(j=216,0)
k=t*d
r=j/2*S(n*10*k)
fillRect(r*C(k),r*S(k),3,3)}translate(0,-j*7)}

Feb 9 2020 12:45 PM UTC

}// 140/140

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angelnm

function u(t) {

r=()=>(~~(Math.random()*3)-1)*9
f=(V,Q,W)=>{x.fillStyle=R(V,-V),x.fillText(8,Q,W)}
t?f(a=255,X+=r(),Y+=r()):X=Y=O=P=540
f(-a,O+=r(),P+=r())

Feb 9 2020 3:07 AM UTC

}// 139/140

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pavel

function u(t) {

for(i=36;--i;x.fillRect(m?Math.abs(9*t%53-26)<<6:i*60-210,m*i*327,60<<2*m,m?99:2e3))m=i<3,x.fillStyle=m?i%2?'#ff0':'#00a':i%2&t/4?R():'#eee'

Feb 9 2020 1:50 AM UTC

}// 140/140

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Stepping feet #illusion

u/katkip

#opticalillusion
u/veubeke

@pavel Sorry, I didn’t see your dweet. I deleted mine and will do a better job searching next time.
u/pavel

I was just cross-posting mine as they were on the same topic without a clear keyword. You should have kept yours, it was clearly different.

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DaSpider

function u(t) {

eval(unescape(escape`𩐽𦱝𒡩𩠨𘑴𚑦𫱲𚁣🐴𝀬𨠽𦱩👣𚡣𧐻𪐭𛐻𚑢𦱩𧐽𪐥𝰥𜠊𩡯𬠨𪐽𨰪𨰻𪐭𛐻𚑦𫱲𚁮🐰𛁦🐹𞱦𛐭𞱮𚰽𨡛𚁾勺𪐯𨰩𚱣𚱦𙐳𛐱𚐥𨰪𨰫𚁩𚱣𚱾勺𩠯𜰩𛐱𚐥𨱝𛁥𦱩𧐽𫠽🐳𯁮𛑢𦱩𧐽🐳𛁸𛡦𪑬𫁓𭁹𫁥👒𚁢𦱩𧐪𪐩𚑸𛡦𪑬𫁒𩑣𭀨𪐥𨰪𨰬𪐬𨰬𨰩𒡢👥`.replace(/u../g,'')))

Feb 9 2020 1:05 AM UTC

}// 139/140

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Modelling #bacteria #algae #coronavirus #growth with John Conway's #GameOfLife - special thanks to u/rodrigo.siqueira for the code slashing support!

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u/tomxor

Nice! beat me to it, although i'm doing something slightly different... progressing at a rate of -4 chars per day :P
u/rodrigo.siqueira

This grid takes about 850 generations to stabilize between 2 states! "Theoretically, Conway's Life has the power of a universal Turing machine: anything that can be computed algorithmically can be computed within Life."
u/DaSpider

Clicking tags I realized the sheer number of cool #gameoflife dweets of times yore. 😲
u/tomxor

Yup, some of the oldest ones from 2017 are quite impressive and completely ucompressed, although that tag is a bit polluted with serpinski triangles later on.
u/rodrigo.siqueira

Code with 185 characters:
u/rodrigo.siqueira

for(w=44,i=w*w;i--;)T[i*!t]=i%7%2 for(e=[i=w*w];i--;)for(n=0,f=9;f--;n+=T[(~~(i/w)+w+f%3-1)%w*w+(i+w+~~(f/3)-1)%w],e[i]=n==3|n-T[i]==3,x.fillStyle=R(T[i]*i),x.fillRect(i%w*w,i,w,w));T=e
u/rodrigo.siqueira

Code with 185 characteres (previous code not working because comment removed a new line): for(w=44,i=w*w;i--;)T[i*!t]=i%7%2;for(e=[i=w*w];i--;)for(n=0,f=9;f--;n+=T[(~~(i/w)+w+f%3-1)%w*w+(i+w+~~(f/3)-1)%w],e[i]=n==3|n-T[i]==3,x.fillStyle=R(T[i]*i),x.fillRect(i%w*w,i,w,w));T=e

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angelnm

function u(t) {

c.width=1920
for(i=0;i<9;i++)
a=25*C(t),
b=200*C(t),
x.fillRect(560+i*100-a,540-b,2*a,2*b),
x.fillRect(960-b,140+i*100-a,2*b,2*a)

Feb 9 2020 12:28 AM UTC

}// 129/140

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First One!

u/tomxor

Welcome :)
u/Xen

nice!

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rodrigo.siqueira

remix of d/17516 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert(1'
for(a=b=0,i=1e4;i--;x.fillStyle=R(0,b*199,i/50),x.fillRect(a*600+960,b*490+540,.2,1))a=b*C(a*3),b=S(i/99+t)

Feb 8 2020 6:00 PM UTC

}// 133/140

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Color #bifurcation symmetry

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iznax

remix of d/17503 by u/iznax

function u(t) {

eval(unescape(escape`𩡯𬠨𪐽𜀻𬀽𚁫👩𙠶𜰩𛰲𜀬𣰽𚁪👩🠾𝠩𛰱𝀬𨐽𚁪𚱴𚠲𝐩𙠱𜠷𛀫𚱩🀲𞀰𜀻𮀮𩡩𫁬𤡥𨱴𚀹𝠰𛑃𚁏𚐪𤰨𬀩𚠵𜀰𛀵𝀰𚱃𚁰𚐪𝐰𜀬𝀹𛀲𝀩𚑸𛡦𪑬𫁓𭁹𫁥👒𚁧👓𚁡𙡫𚐪𞀰𚠨𜠮𞀭𣰩𚠨𚁡𛐴𜠩𚠪𜠫𚁫𛐴𜠩𚠪𜠼𝐶🰮𜠺𜐩𛁧𛁧𛀮𝐩`.replace(/u../g,'')))//iznax

Feb 8 2020 4:23 AM UTC

}// 140/140

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Star-Killer-Alpha

dwitter.net | KilledByAPixel (69401)