POV-Ray : Newsgroups : povray.binaries.animations : Mysterious vanishing isosurface : Re: Mysterious vanishing isosurface Server Time
7 Jul 2022 03:59:12 EDT (-0400)
  Re: Mysterious vanishing isosurface  
From: clipka
Date: 11 Dec 2016 22:27:24
Message: <584e191c@news.povray.org>
Am 12.12.2016 um 04:09 schrieb Mike Horvath:
> On 12/8/2016 9:36 PM, Mike Horvath wrote:
>> If I rotate the camera 90 degrees around the x axis, the isosurface
>> disappears.
>>
>> Mike
> 
> I'm not sure why, but increasing the contained_by box fixed the problem.
> I used:
> 
>     contained_by
>     {
>         box {-1,1}
>     }
> 
> instead of:
> 
>     contained_by
>     {
>         box {0,1}
>     }

Maybe your functions have numeric instabilities near x=0, y=0 or z=0;
choosing a bounding box that does not coincide with these values would
drastically reduce the chance of the isosurface alhorithm hitting those
locations exactly, and it might now just skip over that ditch.


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