POV-Ray : Newsgroups : povray.beta-test : Clock precision wrong? : Re: Clock precision wrong? Server Time
28 Sep 2024 12:45:55 EDT (-0400)
  Re: Clock precision wrong?  
From: Warp
Date: 29 Jun 2011 15:59:21
Message: <4e0b8419@news.povray.org>
Thorsten Froehlich <tho### [at] trfde> wrote:
> On 27.06.11 08:14, Warp wrote:
> >    The difference is subtle, but exists.

> Yes, at that point there will also be a difference in the computation. It 
> will be noticeable above 10 million frames (10**7), which is 46 hours for a 
> 60 fps animation. This is due to the clock value being transmitted as 32-bit 
> float while the computation is done with 64-bit floats. Thus, to see the 
> error, you need to exceed the precision limit of the 64-bit float, which is 
> about eight decimal digits greater than that of a 32-bit float.

  Nope. All you need to do to get a noticeable rounding error is to see
if the clock value in the final frame is 1.0.

  Is not using the more accurate method a matter of principle or something?

-- 
                                                          - Warp


Post a reply to this message

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