Planetside Software Forums

General => Open Discussion => Topic started by: j meyer on May 28, 2013, 11:05:24 AM

Title: Simple Fractal Trees
Post by: j meyer on May 28, 2013, 11:05:24 AM
Have been playing with fractal trees lately and these by-products so to say.
Anybody interested in stuff like that?

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Title: Re: Simple Fractal Trees
Post by: Walli on May 28, 2013, 12:58:49 PM
I like it ;-) What system/tools did you use? Is it fractlas, or l-systems?
Title: Re: Simple Fractal Trees
Post by: j meyer on May 28, 2013, 01:47:50 PM
Done 'manually' with Wings3d.
They are based on regular polygons and/or polyhedra.
I guess mathematicians would classify these under L-systems.
Title: Re: Simple Fractal Trees
Post by: Walli on May 28, 2013, 01:58:17 PM
ah, now I understand! And then you added a subdivision thingy on top to smooth the shape. I like it.
Title: Re: Simple Fractal Trees
Post by: TheBadger on May 28, 2013, 09:14:46 PM
Strange  :o

If you could get some gnarly displacement for bark, they could be quite interesting.
Title: Re: Simple Fractal Trees
Post by: j meyer on May 29, 2013, 11:19:38 AM
Walli - exactly  :)

The Badger - you can easily displace them with PFs.
Title: Re: Simple Fractal Trees
Post by: j meyer on May 29, 2013, 01:29:27 PM
Not exactly trees,but since that type of fractals is called tree fractals .... who cares anyway.

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Title: Re: Simple Fractal Trees
Post by: Tangled-Universe on June 03, 2013, 10:48:55 AM
I'm getting more interested in doing this kind of stuff every day since I have begun digging into Houdini's background and possibilities.

There's a great site with papers about research on plant growth.
Your first example shows a very nice and simple subdivision algorithm where each iteration bifurcates at a set angle when the distance is half of its previous distance.

Logically this simple algorithm has evolved into more complicated algorithms, but which give much more realstic and visually appealing results.
Here, for instance:
http://algorithmicbotany.org/papers/selforg.sig2009.small.pdf
Title: Re: Simple Fractal Trees
Post by: efflux on June 03, 2013, 10:51:49 AM
These are cool.
Title: Re: Simple Fractal Trees
Post by: j meyer on June 03, 2013, 11:18:15 AM
Quote from: Tangled-Universe on June 03, 2013, 10:48:55 AM
.....
Your first example shows a very nice and simple subdivision algorithm where each iteration bifurcates at a set angle when the distance is half of its previous distance.

Logically this simple algorithm has evolved into more complicated algorithms, but which give much more realstic and visually appealing results.
....

The first example has an other ratio than that.Based on an octagon.sorry, a square
of course.
I have made two more versions of that with different rotations and one looks a bit
more organic,but that is not my goal.As I said before these are by-products rather.
I've seen things like the pdf you linked to,but I don't understand these formulas.

Thanks to both of you for your interest.
Title: Re: Simple Fractal Trees
Post by: TheBadger on June 03, 2013, 08:37:28 PM
T-U
Hope you will dive in! Not just walk around the edges. Just dont forget about TG2. We need you here.

J
Interesting objects in the last set of posts. Keep playing and posting when you can.