"jr" <cre### [at] gmailcom> wrote:

> nice.  the colour changes are good, difficult to tell whether change is solely
> due to crossing a stave, even having split the mp4 into frames (I think they're
> not).

They're not. The color changes are solely dependent upon the pattern defined in
the media functions.
Bozo is a sort of smoothly changing noise function, AFAIK.
http://www.f-lohmueller.de/pov_tut/tex/tex_755e.htm
I tried playing around with other functions, and I saw that a real problem with
trying to change colors using RGb is that you get a lot of --- washed out
gray/cyan type colors, which is why I wanted full saturation HSV


> never used 'bozo'.  have read the docs and still find it difficult to relate to
> what we're seeing.  there's also a remark about a default colour_map which only
> confused things (for me) further.

Use POV-Ray's drop-down insert menu, go to Patterns1 and then select bozo
I rendered a test box with the default bozo pigment (attached)

> in a previous post you write "..define different functions based upon the
> "space" the notes are traveling through".
>
> that sounds a good idea.  how would that work?  have an object, which has the
> user_defined {} construct and is not visible, travel across various function
> "spaces"?  can this be discussed without descending into maths??  :-)

Yes, which is exactly what is going on in the animation - though as you point
out, the execution kinda sucks.

I'll render another quick animation to see if I can better illustrate it.

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