POV-Ray : Newsgroups : povray.advanced-users : truncated spheres : Re: truncated spheres Server Time
4 Oct 2024 23:17:19 EDT (-0400)
  Re: truncated spheres  
From: Alain
Date: 20 Mar 2007 18:41:09
Message: <46007115$1@news.povray.org>
Tim Attwood nous apporta ses lumieres en ce 20-03-2007 04:11:
>> You'd think that a double precision float would be able to handle more 
>> than this, since the difference between the two is only 20 bits, but 
>> apparently this is the limit.

> Oh yeah, I guess it uses doubles in there too, maybe 3.7 will be more
> accurate? (probably not though... but maybe the 64 bit version
> eventually?)


Version 3.7 use double precision the same way as version 3.6, 3.1 and previous. 
64 bits processors still use the 64 (80 internal = double and half precision) 
bits FPU used in previous 32 bits CPU, even 16 bits BPU used, then external, 64 
bits FPU.
You need 128 bits FPU (quad precision) to realy exeed actual precision limitations.

-- 
Alain
-------------------------------------------------
Getting the job done is no excuse for not following the rules.


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