POV-Ray : Newsgroups : povray.binaries.images : Isosurface planet: strange artifacts! : Re: Isosurface planet: strange artifacts! Server Time
2 Nov 2024 18:48:06 EDT (-0400)
  Re: Isosurface planet: strange artifacts!  
From: Jörg 'Yadgar' Bleimann
Date: 11 May 2010 16:57:28
Message: <4be9c4b8$1@news.povray.org>
High!

On 05/08/2010 08:19 AM, clipka wrote:

> If this should be the cause of your artifacts, it might help to modify
> the functions so that the function values increase in absolute
> magnitude, e.g.:
>
> 0.00000000001[235]
> 0.00000000042[260]
> 0.00000000073[450]
> -0.00000000003[345]
>
> Then again, maybe the rounding happens somewhere else in the function.
> In that case you might need to get a clear picture of where exactly you
> lose precision in there.
>
> (The most "precision-eating" operations in floating-point math are sums
> (or differences) of values with very different orders of magnitude.)

So, scaling the whole isosurface one or two orders of magnitude larger 
would solve the problem? Or do I have to add some "micro-noise" to the 
function?

See you in Khyberspace!

Yadgar


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.