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Author Topic: Not so impressive video..but why so few colors?  (Read 1296 times)
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mrrgu
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« on: January 08, 2010, 01:39:57 AM »

Hello

I did this rendering through the Mandelbulb, slice by slice 600 iterations per slice and displaying result every 10th iteration.
Displayed the result with colors r g b mapping directly to (x, y, z) from the iterations.

Question is why so few colors and no blue??
Do this mean the vectors are escaping only in certain directions ?

Flickering at least I can explain that is orbits that do not settle.


Video is kind of slow..so you should move forward..

http://www.youtube.com/user/mrrgu#p/a/u/0/W01jyg3sBTc


« Last Edit: January 08, 2010, 02:54:52 PM by mrrgu » Logged
mrrgu
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« Reply #1 on: January 08, 2010, 07:24:38 PM »

Can no one explain this ?
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gaston3d
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« Reply #2 on: January 08, 2010, 09:43:19 PM »

Displayed the result with colors r g b mapping directly to (x, y, z) from the iterations.
Question is why so few colors and no blue??

assuming you get last iteration point for color mapping, try:
(r,g,b) = (kx*abs(x), ky*abs(y), kz*abs(z)), where k ~0.1 ~0.01 ? maybe some shift?
abs for situation if z values are always negative. i don't know if it's possible, but thats probably yields no blue.
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Buddhi
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« Reply #3 on: January 08, 2010, 09:57:12 PM »

I made the same experiment but I have completely another result. Please look at attached picture. There are all 3 colours (R=x, G=y, B = z), also blue. Colours are smooth - it means that vectors are escaping in every direction (not quantised). I think you have some bug in program and colours are clipped.


* XYZ.jpg (194.43 KB, 810x810 - viewed 289 times.)
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bib
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100008697663777 @bib993
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« Reply #4 on: January 08, 2010, 10:14:40 PM »

Nice picture Buddhi smiley
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Between order and disorder reigns a delicious moment. (Paul ValÚry)
mrrgu
Guest
« Reply #5 on: January 09, 2010, 12:45:21 AM »

Ok sorry!! My mistake had alpha blending turned on! it made the colors dissapear!

Now it kind of matches Buddi but in lower resolution.



To the right is (theta,phi,z) for debugging..

note temperature outside to the top right..must keep Computer working to get a good temperature in the apartment..bad insulation smiley
« Last Edit: January 09, 2010, 01:36:46 AM by mrrgu » Logged
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