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Welcome to Fractal Forums > Fractal Math, Chaos Theory & Research > (new) Theories & Research > a new coloring method for the buddhabrot
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Author Topic: a new coloring method for the buddhabrot  (Read 749 times)
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ker2x
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« on: July 19, 2010, 12:03:09 AM »
Just a test, i was wondering what the result could be.
I define the colour by the position of the startinig point (the "c" point).

i tried it on a old buddhabrot code in purebasic.

easy to read even of you don't know purebasic :
Code:
  originX = Int(screenSize * (x0 + 2.25) / 3.5)
  originY = Int(screenSize * (y0 + 1.5) / 3.0)
  cR = originX / (screenSize)
  cB = originY / (screenSize)
  cG = (originX + originY) / (screenSize*2)
  
...
  exposure(pos)\R = exposure(pos)\R + cR
  exposure(pos)\G = exposure(pos)\G + cG
  exposure(pos)\B = exposure(pos)\B + cB


The result, of course, is always the same... But it could be a starting point for new ideas
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often times... there are other approaches which are kinda crappy until you put them in the context of parallel machines
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ker2x
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« Reply #1 on: July 19, 2010, 12:17:03 AM »
same method with 10k iteration :
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often times... there are other approaches which are kinda crappy until you put them in the context of parallel machines
(en) http://www.blog-gpgpu.com/ , (fr) http://www.keru.org/ ,
Sysadmin & DBA @ http://www.over-blog.com/
cbuchner1
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« Reply #2 on: July 19, 2010, 01:14:00 AM »
Quote from: ker2x on July 19, 2010, 12:03:09 AM
Just a test, i was wondering what the result could be.
I define the colour by the position of the startinig point (the "c" point).

But "c" only has 2 spatial dimensions (real and imaginary). Color has 3 dimensions (red, green
and blue). I suggest the following variation.

Sample the RGB color from an appropriately scaled color image, e.g a photography,
at the coordinate given by starting point "c". The colors that appear in the photo will
therefore influence the outcome of the coloring process.

Things could be made more interesting by using a movie as source for the coloration.
The same buddhabrot could be then rendered as an animation - frame by frame.  Its
colors and local intensities would be influenced by the corresponding frames in the movie.
« Last Edit: July 19, 2010, 11:00:48 AM by cbuchner1 » Logged
richardrosenman
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« Reply #3 on: August 07, 2010, 09:17:59 AM »
Hi Ker2x;

This is a very nice look!

I am attempting a test based on your technique:



One thing that I'm not understanding is if you go by the c point, it will increase horizontally and vertically (ie. left side of screen = 0 exposures, right side of screen = screen res exposures). This means that the image will always be darker on the left side and brighter on the right. Likewise, it will always be darker on the top side and brighter on the bottom. This is exactly what is happening in my test, yet I do not see it in yours. I think it would look nicer like you have it - only brighter where densities occur. How come?

-Richard
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Richard Rosenman
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kram1032
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« Reply #4 on: August 07, 2010, 11:55:10 AM »
Oh, someone changed the Buddhabrot page of Wikipedia... Because that technique already was presented there...

Very nice though smiley
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ker2x
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« Reply #5 on: August 07, 2010, 02:59:13 PM »
Quote from: richardrosenman on August 07, 2010, 09:17:59 AM

One thing that I'm not understanding is if you go by the c point, it will increase horizontally and vertically (ie. left side of screen = 0 exposures, right side of screen = screen res exposures). This means that the image will always be darker on the left side and brighter on the right. Likewise, it will always be darker on the top side and brighter on the bottom. This is exactly what is happening in my test, yet I do not see it in yours. I think it would look nicer like you have it - only brighter where densities occur. How come?

Ermmm....
Good question ! Thanks for asking it !  embarrass
I ... i don't know ?
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often times... there are other approaches which are kinda crappy until you put them in the context of parallel machines
(en) http://www.blog-gpgpu.com/ , (fr) http://www.keru.org/ ,
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richardrosenman
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« Reply #6 on: August 07, 2010, 07:28:47 PM »
Quote from: kram1032 on August 07, 2010, 11:55:10 AM
Oh, someone changed the Buddhabrot page of Wikipedia... Because that technique already was presented there...

Very nice though smiley

Hi Kram1032;

Can you provide a link? I didn't see it in the Wikipedia page and would like to.

-Richard
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Richard Rosenman
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kram1032
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Posts: 1863
« Reply #7 on: August 08, 2010, 11:02:38 AM »
That's what I meant with someone changed it.
It used to be there but it's gone...
(Or I looked at the wrong spot^^ - Stay tuned.
It was just a mere screenshot with description though. No implementation details)

Edit: Nope, it's definitely gone. It was either on the German Wiki about the Mandelbrot set or on the English Wiki about the Buddhabrot set.. Now it's not found in either...
« Last Edit: August 08, 2010, 11:05:45 AM by kram1032 » Logged
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