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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tomxor

function u(t) {

c.width=w=120
for(i=w*33;i--;x.fillRect(i%w,i/w*2,1,2))f=i%w+t*60,n=T(0|(i/w+f^f-i/w)/(t**.7+6)),x.fillStyle=R((n&1)*i/n/8,n**n,(n&3)*i/n/4)

Nov 3 2018 5:53 PM UTC

}// 140/140

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#retro #fractal #game

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u/tomxor

For the lazy game designer... Just add chip tunes and a player :D
u/tomxor

#crt #degauss #sidescroller
u/magna

Awesome!
u/magna

I had a RGB CRT setup, but I hadn't been able to fit any interesting patterns: d/7512
u/tomxor

I had a look at yours magna, they are true crt, much more realistic i think. The scan lines on this are just a sideeffect I exploited and it was easy to add colour distortion in the R().
u/magna

Here we go: d/10843
u/C010011012

is it a cellular automata?
u/tomxor

Yes and no, it's a fractal n=T(0|(i/w+f^f-i/w)/(t**.7+6)) which is just a more elaborate variation of serpinsky triangles to produce more interesting patterns. Some fractals are automata, but not all automata are fractals, see here: https://en.wikipedia.org/wiki/Rule_90
u/tomxor

The implication is serpinsky triangles are computationally reducable, meaning it does not have to be computed in the same way as a cellular automata i.e state can be computed at step t directly without traversing intermidiate steps.

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h3rmanj

function u(t) {

c.width=568,c.onmousemove=e=>{v=e.x,y=e.y}
for(i=88;i--;x.moveTo(300+S(t+i)*200,150+C(t)*C(i)*150),x.lineTo(v,y),x.stroke())x.beginPath()

Mar 27 2018 12:53 PM UTC

}// 137/140

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works after hovering it

u/h3rmanj

probably don't work in older browsers either
u/BirdsTweetCodersDweet

It doesn't work till you hover on it, because v and y have no default values
u/BirdsTweetCodersDweet

c.width=568 t?0:(v=0,y=0) c.onmousemove=e=>{v=e.x,y=e.y} x.beginPath() for(i=88;i--;x.moveTo(300+S(t+i)*200,150+C(t)*C(i)*150),x.lineTo(v,y)) x.stroke() is too long, but fixes the hover issue - maybe you can golf it ;)

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Xen

function u(t) {

with(x)font="19em'",fillText(z="5k Awesomes",99,599),strokeText(z,99,599),fillStyle=`hsl(${Z=t**t},99%,50%,.1)`,drawImage(c,C(Z)*19,S(Z)*19)

Jan 14 2021 2:59 PM UTC

}// 140/140

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5k Awesomes, thank you Dwitter family!

u/ciaccodavide

5k +1 :P
u/Qwitter

Congratulations & thanks for all the cool Dweets!
u/magna

Dwitter Xentifies
u/codingsilver

WOAHHH
u/danny@hille.dk

Congrats on 5k 🥳🥳🥳🥳 you are a machine 🤖 Dweet machine 🤖

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jamespwilliams

function u(t) {

c.width|=0; /* clear the canvas */
for(i=0;i<100;i++){
x.fillStyle=R(225,255-i*2.55,i*2.55);
x.fillRect(i*20, 400+S(i*t/10)*300, 10, 200);
}

Dec 28 2017 1:17 PM UTC

}// 140/140

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u/Bendoman

Nice

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ArthurThuczsec

remix of d/12236 by u/butcherfly

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(i=99;i--;x.fill(x.arc(960+C(i+t)*9,540+S(i+t)*9,5*i,0,9)))x.beginPath(x.fillStyle=R(S(t*i)*255,0,i,.6))

Aug 11 2021 10:20 PM UTC

}// 131/140

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Niklas

remix of d/1934 by u/Niklas

function u(t) {

for(c.width|=0,a=200,C(t/2)<0&&(a*=-1),i=0;i<6.28;i+=.01)x.lineTo(960+1200*S(t/2)+a*C(i)-a*Math.pow(S(i),2)/1.4,540+a*C(i)*S(i));x.stroke();

Mar 7 2017 4:33 PM UTC

}// 140/140

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Jezza

remix of d/13814 by u/Jezza

function u(t) {

A=M=(Y=frame)/120-4.5;for(X=1919;X--;){B=N=X/120-8;for(i=9;i--;)[A,B]=[C(A-B)+M,S(A+B)+N];x.fillStyle=R(Z=A*B*9+99,Z,Z);x.fillRect(X,Y,1,1)}

May 14 2019 2:08 AM UTC

}// 140/140

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u/username

wow holy fuck, this actually looks like a photo
u/13thptr

übercool
u/magna

How in...
u/katkip

#slowrender
u/d0n.key

No clue what it is, but it looks realistic :D
u/iverjo

Wow! How does this work?

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katkip

remix of d/20435 by u/yonatan

function u(t) {

c.style.filter=`invert(`
t/=4
x.globalAlpha=t*t/9
x.beginPath();
x.arc(960+t*216,540+t*216,500-t*339,0,7)
x.fill()

Oct 31 2020 4:04 PM UTC

}// 114/140

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i tried to copy it

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tzador

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀠𯀽𜀊𡠽𚁪𚐽🡻𒡩𩠨𪠼𞐹𞐩𮱸𛡳𨑶𩐨𚐊𮀮𭁲𨑮𬱬𨑴𩐨𤰨𪠪𞐹𜰩𚠲𩐳𛁓𚁪𚠸𞀸𚐪𜑥𜰩𒡸𛡲𫱴𨑴𩐨𪠪𞐩𒡸𛡳𨱡𫁥𚀮𞐹𚠪𪠬𛠹𞐪𚡪𚐊𩡯𬠨𪐽𞐻𪐭𛐻𚑸𛡦𪑬𫁒𩑣𭀨𪐪𞐹𚱓𚁴𚱪𚠹𜰩𚠳𜀰𛀰𛀵𜀬𜠰𜀩𒡸𛡲𩑳𭁯𬡥𚀩𒡆𚁪𚰱𚑽𯐊𡠨𜀩`.replace(/uD./g,"")))

Feb 23 2025 10:29 PM UTC

}// 140/140

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#default

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rodrigo.siqueira

remix of d/28300 by u/rodrigo.siqueira

function u(t) {

f=n=>Math.abs(n+~n+.5)
for(c.width%=W=X=2e3;X--;)for(Y=1,k=8;k--;x.fillRect(X,Y*(W-9/t/t)-999,C(Y+4.5),W))Y-=Math.abs(f(3**k*X/W)-.3)/3**k

Aug 17 2023 1:47 AM UTC

}// 138/140

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Highest mountain #fractal

u/jdspugh

Borobudur