abram wrote:
> So is this a function that you have defined within povray for the isosurface or
> are you using a df3 file?
> 
> Instead of fiddling with user-definable functions within povray I added a new
> function to povray's fnintern.cpp which allowed me to render mandelbulbs with
> povray.
> 
> The patch:
> http://softwareprocess.es/x/x/mandelbulb/fnintern.cpp.patch
> 
> How I call it:
> http://softwareprocess.es/x/x/mandelbulb/mandelbulb.pov
> 
> And a description of how I got here:
> http://softwareprocess.us/index.cgi/Mandelbulb
> 
> I really think the functional approach is superior to the voxel approach since
> getting 1000x1000x1000 voxels is time consuming and space consuming.
> 
> But if you did define your own function in isosurface I'd love to see it.
> 
> abram
> 
> 
> ------------------------------------------------------------------------
> 
Very nice!

I was hoping that someone would take that approach, I looked into the 
source but didn't understand it quite well enough to make my own patch.

On that note, I wonder if it would be feasible to add some sort of 
user-defined recursive function to the fractal class (z=z^n+c for this, 
but replace that ^n part with whatever you want), much like 
julia_fractal takes the function name as a parameter. It would make POV 
into a very usable fractal generator, since the raytracing side of it is 
so well defined already, and most of the other fractal tracers are 
homebrew contraptions that are struggling to get good shading but have 
the math down.

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