Dweets awesomed 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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veubeke

function u(t) {

c.width^=0
for(i=3;i--;)
$=i<2,s=16+$*(S(t/2)*(10-i*20)),x.font=s+'em"',
x.fillText(['🌷','🌻','🌧️'][i],1260-600*($?i:C(t/2)<0)-8*s,$?900:400)

Feb 10 2020 12:49 PM UTC

}// 140/140

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#growth

u/tomxor

#cute :D

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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) {

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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angelnm

function u(t) {

w=40
z=(x)=>Math.floor(x/48)*w
f=(x)=>(z(i)+x)%255
for(i=0;i<1296;i++)
x.fillStyle=R(f(0),0,f(128)),
x.fillRect(i%48*w,z(i)+C(i+10*t)*9,w,w)

Feb 9 2020 1:43 AM UTC

}// 140/140

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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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katkip

function u(t) {

f=(x,y)=>C(x)*S(y)<0?f(y-2,x-1):S(x)+C(y*9);for(i=2999;i--;)X=(r=Math.random)()*213,Y=r()*122,f(X/7,Y/7)<0?x.fillRect(X*9,Y*9,4,4):t

Feb 8 2020 5:23 PM UTC

}// 132/140

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#recursive #waitforit

u/Xen

love it

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rodrigo.siqueira

remix of d/17508 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert(1'
for(X=Y=i=1e4*(t<6);i--;x.fillRect(960+900*X,560+300*Y,.1,1)){if(i%99==0)X=S(t*i**8)
Y=S(X)*+C(Y*2.4)*1.4}

Feb 8 2020 12:38 AM UTC

}// 132/140

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Link of Symmetry #bifurcation (Period-halving bifurcations leading to order, followed by period doubling bifurcations leading to chaos)

u/Xen

love it!

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DepressoEspresso

function u(t) {

c.width=566// clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*900,200,50,400) // draw 500x200 rects

Feb 8 2020 12:16 AM UTC

}// 111/140

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i dont relly know what i did i was just typing in random stuff

u/Xen

have a play with any dweet and do a remix, soon learn ;-)
u/lionleaf

Welcome to dwitter! :)

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