In article <402b0c90@news.povray.org>,
 "Maurya Shah" <mau### [at] hotmailcom> wrote:

> 1) Hermite interpolation - its better because it gives smoother
> interpolation and uses more information

Interpolation of what? Is this some kind of spline-based integration for 
media, like Simpson's rule, or is it a new spline type? Or something 
else?


> 2) Given a density mass, the user can specify a threshold and an 
> epsilon, so that all the values below threshold-epsilon are clamped 
> to zero and and those between threshold to threshold-epsilon are 
> smoothly interpolated towards zero. This is basically to get  
> different shapes with the same density volume without getting any 
> artifiacts due to truncation by a threshold.

I'm not sure of what use this is. It sounds fairly trivial to do with a 
function pattern.


> 3)  Use of temperature instead of density to specify the color of the media.

How is this different from just using a density pattern and density map? 
Sounds like just a multiplier for the density color...


> Adding perlin noise to the color values to simulate the details.

Could you explain further? Are you adjusting the final computed values, 
some kind of 2D modulation of the media?


> I am new to the open source community and not quite sure of the 
> procudures involved in here. But surely if these features are useful 
> to others I will be glad to clean them up first and share it with 
> others.

Well, first, POV isn't open source. ;-)
The source code is available, and it is allowed for you to distribute 
modified versions, but there are more restrictions than what you get in 
a "true Open Source" license.
Just clearly mark the locations of your changes/additions, and 
distribute the modified files, or if the patch is simple enough, the 
modified portions and instructions on where to put them. It'd be a good 
idea to follow the MegaPOV conventions...that's about as standard as it 
gets. More info here:
http://megapov.inetart.net/manual/internals.html

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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