Title: Period 18 Julia (periodic bailout) Post by: David Makin on March 12, 2009, 02:09:08 AM Period 18 Julia (periodic bailout)
(http://www.fractalforums.com/gallery/0/141_12_03_09_2_09_07.jpg) http://www.fractalforums.com/index.php?action=gallery;sa=view;id=491 Hi, this is a period 18 Julia Set rendered by bailing out when the period is discovered and coloured using a mixture of smooth iterations and the real value of z at bailout. Normal divergent bailout was also used but that area is just coloured black. Just one layer - the colouring formula used was mmf3:Extended Cilia and max. iterations was set to 10000 with a convergent bailout test value of 1e-8 and a divergent bailout of 65536. Note that because this is a Julia Set with only one period involved no extra iterations were required beyond the initial bailout. It was rendered to disk at 3840*2880 without AA and took about 11mins on a (heat challenged) 3GHz P4HT. The fractal formula used is still WIP but I hope to finish it this week :) Title: Re: Period 18 Julia (periodic bailout) Post by: Adam Majewski on April 06, 2012, 11:08:29 PM Great image. Can you show source code ? You use a divergent bailout of 65536 ? Why not 2 if you are making exterior all black ?
Title: Re: Period 18 Julia (periodic bailout) Post by: David Makin on December 15, 2015, 12:27:49 PM I realise this is a little late......all code included in the UPR.
Using 65536 is just habit from using colourings that require higher bailouts for accuracy. Title: Re: Period 18 Julia (periodic bailout) Post by: Adam Majewski on June 24, 2017, 12:38:40 PM Thx. It is 3500 lines of code Probably your own program in c should be shorter. :) |