POV-Ray : Newsgroups : povray.binaries.images : Strange Artifacts : Re: Strange Artifacts Server Time
30 Jul 2024 18:16:30 EDT (-0400)
  Re: Strange Artifacts  
From: Jörg 'Yadgar' Bleimann
Date: 2 Oct 2011 16:43:13
Message: <4e88cce1@news.povray.org>
High!

Am 02.10.2011 13:13, schrieb clipka:

>
>> cylinder
>> {
>> <2.1+cp, sh+2*rfh/(mr+1), 4.1>, <4.9, sh+2*rfh/(mr+1), 4.1>, or
> ~~~
> Note that this does /not/ coincide with the sphere's center. You need to
> apply the small correction here as well to fix this...

Yes, that's obvious...

>> <-(3.6+or+df), -(or+2*df), -(3.6+or+2*df)>, <3.6+or+2*df, or+2*df, 0>
>> rotate <0, degrees(atan(0.1/3.5)), 0>
> ~~~~ ~~~
> ... and here you're miscalculating the angle, using both the wrong
> values (should be 0.1/3.6 rather than 0.1/3.5) and the wrong formula
> (should be asin rather than atan).

Oh...

After your suggested corrections, it looks almost perfect... but there 
are still those parallel rows of dots, just like there were 
coincindental surfaces!

See you in Khyberspace!

Yadgar


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