T * sin (t)' ≈ Ornamented Christmas Tree (2013)

[ryeguy_24]

Merry Christmas HN. Ever year, the original T * sin(t) Christmas tree gets posted. This year, I wanted to call out my favorite modification by Silvia Hao. It’s beautiful. One year, I’ll try to add to its beauty. But for now, I’ll just appreciate it. She posted it here: https://community.wolfram.com/groups/-/m/t/175891

[JadeNB]

I checked the post, but it's from someone who's far more comfortable with Mathematica than I am, so I hope you won't mind my asking about the maths.

First, the T vs. t in T * sin(t) doesn't mean anything, right? Second, the ' in the title T * sin(t)' doesn't belong, right?

Then I think that this is graphing essentially (t * sin(t), t * cos(t), t + something), which is a cone if the something is constant, which I believe it is—and that certainly matches the graph. And the rest is about choosing an aesthetically pleasing step size and accomplishing the lovely twinkling and colors, right?

[Arnavion]

Silvia Hao's version is the one submitted here to HN, actually.

[jll29]

That's a beautiful animation (and useful maths ;-).

In the spirit of minimalism, Merry Christmas to all HNers with this little but time-tested command:

  $ xmastree 5 9 2024`
                                *
                               ***
                              *****
                             *******
                                *
                               ***
                              *****
                             *******
                                *
                               ***
                              *****
                             *******
                                *
                               ***
                              *****
                             *******
                               ***                              
                               ***                              
                               ***                              
                               *** 

Source: https://github.com/jochenleidner/ltools/blob/main/src/bin/xm...

[Lerc]

I made this Bauble dweet as a Christmas themed exercise in 2020 https://www.dwitter.net/d/20993

    function u(t) { 
        t||(c.width/=6)  // shrink canvas to 1/6 at t==0
        M=a=>x.filter=a?"none":"blur(1px)brightness(90%"
        M();x.drawImage(c,0,0)
        for(i=n=90;--i;)
          x.fillRect(
           160-S(X=i+t*4)*(1-(v=C(i*n))*v)*n,
           v*n+n,
           4,
           2,
           x.fillStyle="#F"+(i+10),M(C(X)<0))    
    }

with u(t) is called 60 times per second. t: elapsed time in seconds. c: A 1920x1080 canvas. x: A 2D context for that canvas. S: Math.sin C: Math.cos

[foobar1962]

My first time seeing it. Thanks for posting, and thanks to HN for being the kind of place that stuff like this gets posted.

[leeoniya]

https://github.com/anvaka/atree

https://js1k.com/2010-xmas/demo/856

http://www.romancortes.com/blog/how-i-did-the-1kb-christmas-...

[matsemann]

Here's variants using 140 characters of Javascript: https://www.dwitter.net/h/christmas

[theodpHN]

GIF Xmas Tree, GIF Xmas Tree... https://communities.sas.com/t5/Graphics-Programming/Fun-with...

[belter]

Happy Festive Season! A nice one from Desmos: https://www.desmos.com/calculator/wgunyn2yd0

[bazzargh]

Here's one I did for the bbcmicrobot using a Chaos Game approach

https://bbcmic.ro/?t=8W1n6

[noduerme]

I went to Hopscotch in Portland with some friends tonight, tried out the "quantum trampoline" [0]... spent most of my time in socks wondering if that was written in plain ol' javascript or p5. Happy Holidays, folks.

[0] https://www.behance.net/kuflex?locale=en_US#

[capitainenemo]

Well, they do have a github.. https://github.com/kuflex

Looks like it was written in C++

[theodpHN]

A 'Traveling Santa Tour' Through U.S. Capital Cities https://communities.sas.com/t5/New-SAS-User/Fun-With-SAS-ODS...

[theodpHN]

Damped Oscillation Xmas Tree https://communities.sas.com/t5/Graphics-Programming/Fun-With...

[Alifatisk]

I think this would be perfect on openprocessing.org, I just don't know how to implement that.

[BobbyTables2]

Now make 30% of the bulbs randomly burn out :)

[hippich]

Randomly wouldn't be that bad. But whole segments - way more noticable!

[layer8]

Or a drill.

[block_dagger]

This is not a drill. It really is Christmas.