POV-Ray : Newsgroups : povray.binaries.images : Ringworld re-re-revisited : Re: Ringworld re-re-revisited Server Time
29 Apr 2024 16:42:58 EDT (-0400)
  Re: Ringworld re-re-revisited  
From: David Buck
Date: 29 Oct 2005 09:55:24
Message: <43637f4c$1@news.povray.org>
David Buck wrote:

>> Would more scaling down help? My model has currently a radius of 
>> 95,000 pov
>> units, but also translated 95,000 units to keep the camera near the 
>> origin.
>> It is possible to scale everything down more of course, without 
>> changing the
>> aspect of the scene...
>>
>> Thomas
>>
> 
> That's one possibility but it might not work.  The problem may be the 
> relative scales of the scene.  If you scale it down to 95,000 pov units 
> you'll want scale the camera position as well which may cause the same 
> problems in calculations.  I suspect the problem is having a camera so 
> close to a relatively huge object no matter what the scale is.  You may 
> have the same problem with an ordinary scene and moving the camera to 
> 0.00000001 pov units from an object.
> 
> Keep in mind, this is educated speculation since I haven't actually 
> tested this particular scenario, but I suspect it's causing a problem. 
> Try scaling down the world and see what happens, but I suspect you'll 
> have the same problem.  Changing EPSILON may be the only realistic answer.
> 
> David Buck

I just tried it - scaling the scene has no effect on the problem.

David


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