POV-Ray : Newsgroups : povray.beta-test : intersection tests : Re: intersection tests Server Time
29 Jul 2024 00:37:53 EDT (-0400)
  Re: intersection tests  
From: Thorsten Froehlich
Date: 22 Sep 2007 20:57:25
Message: <46f5b9f5$1@news.povray.org>
Grassblade wrote:
> "Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
>> Warp <war### [at] tagpovrayorg> wrote:
>>> Bruno Cabasson <bru### [at] alcatelaleniaspacefr> wrote:
>>>> I am aware of that, of course. But what happens in our scenes? Does every
>>>> pixel concern a different object? Certainly not.
>>>   But how can the program know that without actually testing for it?
>>>
>>> --
>>>                                                           - Warp
>> As a first embryonic try for this idea, it might be enough to try to
>> intersect the previous object that was hit. If success, then time is saved;
>> if fail, go back to normal process, and no significant time was lost. I
>> think that statistically (I insist heavily on that word), we can gain
>> something because most of objects occupy an entire area of the scene, more
>> or less, even if they are plenty of them.
>>
>> Bruno.
> 
> I know nothing of how a ray-tracer works internally, so I may be spouting
> nonsense,

No, he is not on to something. Warp already pointed out that his idea makes
no sense.

	Thorsten, POV-Team


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