T * sin (t) ≈ Christmas tree

by adamnemecek • 13 years ago

321 26 13 years ago

Same formula on Quake's Railgun

icefox• 13 years ago

Got a link? Google found this Quake2 railgun, but it doesn't look to be the same on first glance https://github.com/id-Software/Quake-2/blob/master/ctf/g_wea...

angersock• 13 years ago

That's the game attack logic, not the rendering logic. You want this instead:

https://github.com/id-Software/Quake-2/blob/master/client/cl...

coherentpony• 13 years ago

Yeah it's a helix.

swamp40• 13 years ago

I really like the simplicity.

Can you reverse the direction of one of the spirals?

Or maybe slow down one to half-speed?

(Maybe it would look better, maybe not.)

thejacenxpress• 13 years ago

Nice job

marcosscriven• 13 years ago

Really like that - beautiful and elegant.

adamnemecek• 13 years ago

Someone also reimplemented it in Mathematica

http://community.wolfram.com/groups/-/m/t/175891

chippy• 13 years ago

Very merry cleverness

sheetjs• 13 years ago

Original reddit post: http://www.reddit.com/r/programming/comments/1tswai/t_sin_t_...

zafka• 13 years ago

This reminds me of when I first started programming in Turbo Pascal. I made a Christmas tree using graphic mode and trig functions. I also only used if-then statements so i ended up with about a thousand lines :) Looking at this more elegant tree reminds me of why I went into this career.

CodeWithCoffee• 13 years ago

It seems awfully appropriate 'starring' this repository.

jwmerrill• 13 years ago

Quick reimplementation in the desmos graphing calculator: https://www.desmos.com/calculator/brjshfkaof

Press play next to t_0 to animate.

kevining• 13 years ago

Link to github.io page for the lazy: http://anvaka.github.io/atree/

elwell3• 13 years ago

with dynamic alpha, and mouse orient around x-axis: http://jsfiddle.net/rYa5d/1/

elwell3• 13 years ago

Actually it's a little better when more spaced out: http://jsfiddle.net/rYa5d/8/

coverband• 13 years ago

Very nice and not complicated at all -- good work!

mamadou• 13 years ago

Thanks for sharing!

callmevlad• 13 years ago

Extra credit to anyone who can implement this in HTML/CSS without using the canvas element. Since CSS transformations are hardware accelerated, I bet it can be made to look as smooth as the reference GIF.

elwell3• 13 years ago

Still canvas, but is that any smoother?: http://jsfiddle.net/rYa5d/8/

karanbhangui• 13 years ago

Nice touch with the subtle parallax!

britta• 13 years ago

Several years ago I made a very silly simple Christmas tree in HTML/CSS, with <blink>ing lights and Unicode ornaments, and my friend made a way to place your own choice of "ornaments": http://unicodexmas.com/

Not as stylish, but in the spirit!

prafulrana• 13 years ago

http://runnable.com/Ur4mzpVUigJbAALD/christmas-tree-%5Bt-*-s...

GeorgeKangas• 13 years ago

May I suggest t * sin( k * ln(t) ), for some constant k? That makes the path self similar about the (0, 0) point. Maybe you'd like that.

gky2• 13 years ago

Oh god staring at this just motivates me to work. Thanks a lot for sharing, as well as all the commenters showing the different implementations of it.

c3d• 13 years ago

Yet another entry. The Christmas tree in Tao Presentations is less than 30 lines of code, with a star at the top and blinking lights. Code here: http://www.taodyne.com/shop/dev/en/blog/275-a-christmas-tree....

T * sin (t) ≈ Christmas tree

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