POV-Ray : Newsgroups : povray.advanced-users : Extracting information from an existing color_map : Re: Extracting information from an existing color_map Server Time
19 Jun 2024 18:35:32 EDT (-0400)
  Re: Extracting information from an existing color_map  
From: Bald Eagle
Date: 15 Feb 2023 19:45:00
Message: <web.63ed7b7d1908580e1f9dae3025979125@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:
> With regard to the recent discussions about color_maps,  I was wondering if it
> were possible to somehow extract the number, or even the values of the entries
> in a color_map.

Apparently it was a lot easier than I thought.
Here's a plot of the color map as it gets interpolated through HSV space.
The graph is one of the more successful (and simplest) of several functions I've
been inventing to look for "nodes" in the color_map definition.

> I'm also wondering if there is a color_map that exceeds the valid 0-1 span, if
> it were possible to access those invalid entries using the same sort of hacking
> strategy.

Unfortunately, I haven't brainstormed any way to do this part - that's probably
going to have to be a source-code level change.


- BW


Post a reply to this message


Attachments:
Download 'colormapanalysis.png' (49 KB)

Preview of image 'colormapanalysis.png'
colormapanalysis.png


 

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.