In article <3A56E40F.9D11C7A1@gmx.de>, Christoph Hormann 
<chr### [at] gmxde> wrote:

> That's an interesting idea, although it would be somewhat slow when used
> with pigment functions (1 call to function -> 6 calls)

Also, the max slope may not be the best thing to use...you might want to 
average the three parts, or treat them as components of a vector and 
calculate it's length, or...
As for the speed, yes, it would be slow...but since you mentioned using 
it on functions with large-scale features, it probably would be bearable 
in many cases.
And if you restrict yourself to 2D, you cut it down to 4 calls...and you 
can probably do something with 4 calls in 3D and only 3 calls in 2D, but 
I'm not sure if POV functions can do that...you might have to implement 
it in C, as a patch.


> Thinking about your mentioning of displace warps, i developed another way
> for the 2d case, see p.b.i and p.t.s-f. for the implementation.

Now that is interesting...I had to look at the source to figure out how 
you did it.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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