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I just released mini-fract 0.6, the mostly standalone version of fract. This is a minor update to make it use ZPNG, the supported successor to salza-png that I was previously using. Adam Majewski wrote some introductory notes on how to get started for someone with very little experience with the Common Lisp programming environment. Enjoy!
Fract was recently mentioned in a review of cl-pdf. This reminded me that I had promised something: a static gallery of the most popular regions. Enjoy!
update: I just uploaded a bunch of fractal movies.
One problem with a really stable system is that you don't notice when your init scripts are broken. Fract have been down for the last few days. It happened that it wasn't properly restarting after a power cycle... It should be OK now but don't hesitate to annoy me by email if things aren't working as expected.
Now lets talk about music. Most music today is complete crap. Musicians stick to "the formula", always the same playtime, the same instruments, the same verse/chorus alternation, the same... The best artists can produce excellent stuff but for some reason they won't refrain from publishing the crap too, and they publish a lot of it... Take Wumpscut as an example, Draussen and Totmacher is among the most brilliant music since Beethoven but if you are dumb enough to just drop the CD in your player and push play you'll fall on crap like Wolf and Mortal Highway. Worst, there is plenty of random noisish padding like Phase Shifter and Beleive in Me. Am I suppose to care that you recorded the sound test of your latest reverb pedal? This guy must be smart, can he really not tell what is crap and what is good?
The Mandelbrot Set is the index of the parameters for which there is
a connected Julia Set. Seeing how the two are related is quite
interesting. Especially with animations. And if you like the
little sample, there is a torrent full of them.
The complete source code is included, of course. The walks along the main cardioid and the main bulb are pretty neat. From this we can guess that a walk along some secondary bulb would especially nice. Now, I have to ask for help on that one. The point of intersection of the secondary bulbs are know, they are
(/ (- 1 (expt (- (exp (* 2 #c(0 1) pi (/ p q))) 1) 2)) 4)
The main bulb is p=1 and q=2. The first person who tell me how to find center of the secondary bulbs will win a custom rendered movie! Isn't it a good deal?
update: the torrent is gone. Bittorrent is great for large files with flash popularity. Without it hosting large files like that would have been really difficult. The catch is that you need seeds and you can't hold on them forever. The movie pack was downloaded 75 times for a total of 19 gigs. Wow! Thanks to all the seeds! I'll pay you back with more fractal stuff soon.
I had to opportunity to have a chat with David Steuber, a truly dedicated fractaler. David have been rendering frames for his new fractal movie for the last few months. After I watched his first movie, I wanted more so I added the movie support to Fract. It's basically the same thing as the zoom trail but with many times more frames and a file numbering that helps the encoder. The Fract generated fractal zooming movies are from spots in the scoreboard, I may add automatic movie rendering for the top rated regions in the future.
I added anti-aliasing to Fract. For regular images,
anti-aliasing is best done by averaging a grid of sub-pixels.
For the Mandelbrot Set, dividing a pixel into sub-pixels
actually increase the probability of falling into a punctually
detailed region. A solution
found by SunCode on sci.fractals is to keep only the minimal
escape value of all the sub-pixels. The result is great! Unfortunately a 3x3
sub-pixels grid is 9 times slower to compute so I'm not likely
to add anti-aliasing to the Web interface unless I receive some
hardware donations.
; )
In the mean time someone called Lahvak decided to take over the top 10. In the last few days he submitted several great regions. Many of them made it to the top 10. Lahvak now rules more than half of the top slots. Congratulations Lahvak!
With the trail feature, I could notice a trend. Many of the best regions originate from the tail or somewhere behind a random cardioid. Also, most of the top 10 is dominated by the funky-2 color map. This either means that this one is particularly great or that all the other maps are really ugly. I fear the later case so I'll try to make a few other maps.
