[Papervision3D] Optimizing performance: anything else I can do?

[Ralph Hauwert]

Evidence :
http://www.kaourantin.net/2007/06/mip-map-what.html

Ralph.

On May 9, 2009, at 6:04 PM, Alan Pinstein wrote:

>> Flash stores those textures (power of 2 textyres) in the l2 cache  
>> so they are faster to retrieve.  If you use  
>> BitmapMaterial.MIP_MAPPING = true (or whatever the command is) then  
>> it should do it for you automatically.  It is not mip-mapping in  
>> the typical meaning of 3d.   I think this is only done up to a  
>> certain texture size, but i'm not sure what it is.
>
> What evidence do you have for this? I have searched the web and the  
> Adobe site for information on this and find none. I don't mean to be  
> skeptical, but I find that often online people give advice that is  
> unfounded in reality and after wasting many hours previously chasing  
> ghosts I now require references before I fully believe these things.
>
> Have you got code, links, presentations etc where you learned this  
> information?
>
> Besides, my images are ~34MB in memory which clearly won't fit in an  
> L2 cache. Even if I change this to 512x512 textures these are still  
> 1MB in memory. My machine has only 4MB of L2 cache and could only  
> keep 4 of these, which covers only 1024x1024 pixels. On a 1900x1200  
> screen, it would seem that cache thrashing alone would make this  
> approach useless in helping performance. (These are kinda rough  
> guess calculations, so please tell me if I am making any incorrect  
> assumptions).
>
> Alan
>
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