[Radiance-dev] Mesh Rendering Performance

[Greg Ward]

P.S.  Actually, you're right.  I should have counted the two  
multiplications by the same reciprocal as a single divide.

Sorry.
-Greg

> From: Greg Ward <gregoryjward at gmail.com>
> Date: February 27, 2006 5:06:43 PM PST
>
> Hi Marcus,
>
> I believe the version with one division is when you have stored the  
> surface normal, which is fine for normal polygons in Radiance, but  
> not for the mesh code.  For the mesh code, I would be using the  
> original version, which doesn't require any additional storage.
>
> -Greg
>
>> From: "Marcus Jacobs" <marcdevon at hotmail.com>
>> Date: February 27, 2006 4:54:01 PM PST
>>
>> Greg,
>>
>> You mentioned that the Moller-Trumbore method required two  
>> divisions.  For the code that I implemented,  I only needed one  
>> division at the end to determine the ray length. Here is the page  
>> for various versions of the source code.
>>
>> http://www.cs.lth.se/home/Tomas_Akenine_Moller/raytri/raytri.c
>>
>> I used the one without early division. If I am correct, this code  
>> without early division supports two sided objects.
>>
>>
>> Regards,
>>
>> Marcus