Re: [Fractint] FOTD 20-04-11 (Fractal Evaporation [7])
Recently I showed an image of the FOTD for April 15th rendered by Fracton. You can read Mike Frazer's comments about this here: http://www.fracton.org/fotdtesting.html Here is a rendering by Fracton of today's FOTD: http://linuxenvy.com/bprentice/Fracton/Fractal%20Evaporation.png As you can see it shows features similar to those of the earlier image (Something From Nothing). Do you have any comments on this matter Jim Muth? Does any other reader of this list use Fracton? Brian Prentice
On Wed, Apr 20, 2011 at 10:17 AM, Brian Prentice <bprentice@webenet.net>wrote:
Recently I showed an image of the FOTD for April 15th rendered by Fracton. As you can see it shows features similar to those of the earlier image (Something From Nothing). Do you have any comments on this matter
I am just guessing that this might be a math precision issue. Fracton uses 64 bit double precision floating point calculations for all arithmetic. I think the DOS version of FractInt uses the slightly higher precision 80 bit floating point for some intermediate calculations before it gets rounded back to 64 bit floating point. Fracton seems to draw a slightly different image in fractals with numbers raised to large powers, near the maximum resolution, and whenever Jim says that a very slight change in parameters causes the image to evaporate. -- Mike Frazier www.fracton.org
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Brian Prentice -
Mike Frazier