POV-Ray : Newsgroups : povray.pov4.discussion.general : Ideas. New f_distribution inbuilt function. f_hash usage. (povr branch). : Re: Ideas. New f_distribution inbuilt function. f_hash usage. (povrbranch). Server Time
18 Oct 2021 23:00:44 EDT (-0400)
  Re: Ideas. New f_distribution inbuilt function. f_hash usage. (povrbranch).  
From: William F Pokorny
Date: 15 Aug 2021 10:51:13
Message: <611929e1$1@news.povray.org>
On 8/15/21 10:42 AM, William F Pokorny wrote:
> 
> An image is attached showing four of the implemented distributions of 
> f_distribution as patterns. Using a cylindrical gradient into f_hash() 
> as the initial seed(s) to the stream(s) required.
> 
...
The image attached shows the binomial distribution in the top row and 
the geometric in the bottom row. The left column represents the 
distributions without AA, but otherwise matching the previously posted 
image for those two distributions.

In the right column showing the effects of AA - because it's interesting 
to look at AA this way :-).

Normal (povr am2 random jitter) AA with the binomial in the upper right.

Povr's big jitter (well outside pixel, per pixel random sampling) with 
the geometric distribution in the lower left. With this one there are 
'harmonics' starting to show up as bumps between the usual discrete values.

Bill P.


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Attachments:
Download 'binomialgeometrichist.jpg' (18 KB)

Preview of image 'binomialgeometrichist.jpg'
binomialgeometrichist.jpg


 

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