Le 15-06-28 03:58, clipka a écrit :
> Overhauling the POV-Ray codebase, I've stumbled across something
> surprising (to me) in the implementation of the fractal currently
> implemented via the `HypercomplexFunctionFractalRules` type. Can someone
> with a bit of "fractal fu" please help me and test this out?
>
> In SDL parlance, that should be any fractal using:
>
>      julia_fractal {
>        ...
>        hypercomplex FUNCTION
>        ...
>      }
>
> where FUNCTION is any of:
>
>      acos
>      acosh
>      asin
>      asinh
>      atan
>      atanh
>      cosh
>      cos
>      exp
>      ln
>      pwr(FLOAT,FLOAT)
>      sin
>      sinh
>      tan
>      tanh
>
> Please tell me whether you think the results are ok or bogus.
>

The oddity may explain the strange results I got a while back when 
testing those functions.
I got missmatched dirrect image, shadows and reflection.
Often, it looked as is I was looking at the inside surfaces.
The self shadowing was often just plain wrong.

I still have the images and code and may post them if asked.


Alain

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