I had a similar idea, but the trouble is to fade in a different isosurface 
on the foamy sections you need to know where those foamy sections are, i.e. 
you need to modulate it by the wave function, and a smooth function 
modulated by a function with hard edges is going to have hard edges. As far 
as I can see this paradox is inescapable.

-- 
Tek
http://evilsuperbrain.com

"Kenneth" <kdw### [at] earthlinknet> wrote in message 
news:web.455d57fe7adb74e76135df7c0@news.povray.org...
> "Tek" <tek### [at] evilsuperbraincom> wrote:
>>
>>
>> ...but foam shouldn't be able to have sharp edges.
>>
>> I can't really think of a way to smooth off ridges in a ridged fractal, 
>> so
>> I'll just try to cover it up with some mist/spray effects!
>>
>
> I'm just enthralled with your water.  It is *so* inspiring, and presents 
> (to
> me) a *new level* of the power of POV-Ray.
>
> I've been doing a great deal of isosurface experimentation lately, 
> learning
> lots of new things, and there might be a way to alter those crests. The 
> idea
> involves "fading" one isosurface function into another, over a certain
> distance.
>
> What I'm thinking is this:
> Fading in an f_noise3d function in the +y-direction, somewhere near the 
> top
> of the crests--to actually break them up with "bits" of tiny noise blobs, 
> to
> simulate spray. I *think* (but am not sure) that your water-wave 
> function(s)
> could be used IN the noise function, to actually vary the height at which
> the noise comes into play (so that the noise doesn't just show up at a set
> y-height.) I've gotten this trick to work on some isosurfaces of my
> own...though not of the complexity of your waves.
>
> My ideas are a bit tricky mathematically...and difficult to explain...but 
> I
> now have a methodology of sorts that seems to work, and that "makes sense"
> to me.
>
> I'll definitely take a look at your code--which I'm absolutely overjoyed
> that you've posted--and see if I can do what I've mentioned. If 
> successful,
> I'll post an image.
>
> Meanwhile, I'll work up a simple --VERY simple!--demonstration code 
> example
> (or two) and post it here.
>
> Ken W.
>
>
>
>
>

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