In article <kurtzlepirate-285173.17130230122011@news.povray.org>,
 kurtz le pirate <kur### [at] yahoofr> wrote:

> Hello,
> 
> I have some difficulties to orient objects.
> [snip]
> How to properly orient my torus depending on the normal vector ?

I found my mistakes :

first :
 my rect_to_polar routine return the 'azimuth' with a wrong sign. 


second :
  rotations around y then around z is different from rotation around  z
  then around y.




Now that this issue is resolved, I can continue...

-- 
klp

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