POV-Ray : Newsgroups : povray.unofficial.patches : Direct Ray Tracing of Displacement Mapped Triangles : Re: Direct Ray Tracing of Displacement Mapped Triangles Server Time
3 Jul 2024 03:05:52 EDT (-0400)
  Re: Direct Ray Tracing of Displacement Mapped Triangles  
From: Wolfgang Wieser
Date: 1 May 2003 04:46:14
Message: <3eb0ded5@news.povray.org>
Thorsten Froehlich wrote:

> In article <3eac5446@news.povray.org> , Wolfgang Wieser <wwi### [at] gmxde>
> wrote:
> 
>> I cannot imagine that.
>> I have to wait >4 minutes to get 1 million triangles parsed
>> on a 1.4 GHz box.
>>
>> Furthermore, you must have more than 4Gb of virtual memory.
> 
> No, that just implies there is something wrong with the data you have.
> Could you show a few pieces of the data here?
> 
No Problem.

It's a simple mesh (not mesh2 which eliminates the need for hash lookups 
and thus parses faster). 

triangle { <0.0145291,-0.00082502,3.33516>,
<0.0145319,-0.000761583,3.33501>, <0,-0,3.33654> }
triangle { <0.0145319,-0.000761583,3.33501>, <0,-0,3.33654>, <0,-0,3.33663>
}
triangle { <0.0145319,-0.000761583,3.33501>,
<0.0145352,-0.000698175,3.33504>, <0,-0,3.33663> }
triangle { <0.0145352,-0.000698175,3.33504>, <0,-0,3.33663>, <0,-0,3.3369> }
triangle { <0.0145352,-0.000698175,3.33504>,
<0.0145391,-0.000634792,3.33528>, <0,-0,3.3369> }
triangle { <0.0145391,-0.000634792,3.33528>, <0,-0,3.3369>, <0,-0,3.33684> }
triangle { <0.0145391,-0.000634792,3.33528>,
<0.0145406,-0.000571301,3.33501>, <0,-0,3.33684> }
triangle { <0.0145406,-0.000571301,3.33501>, <0,-0,3.33684>, <0,-0,3.33669>
}
triangle { <0.0145406,-0.000571301,3.33501>,
<0.0145429,-0.000507851,3.33501>, <0,-0,3.33669> }
triangle { <0.0145429,-0.000507851,3.33501>, <0,-0,3.33669>, <0,-0,3.33666>
}
triangle { <0.0145429,-0.000507851,3.33501>,
<0.0145449,-0.000444387,3.33498>, <0,-0,3.33666> }
triangle { <0.0145449,-0.000444387,3.33498>, <0,-0,3.33666>, <0,-0,3.33687>
}

Anything wrong with the data? :)

Parse time could be increased by using mesh2 but mem usage?

Wolfgang


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