Re: speed question

[Frank C <li...@si...>]

On 13-Jul-04, at 12:57 PM, Keith Wiley wrote:

> I found the constants for texture filtering:
>
> typedef enum TQ3TextureFilter {
>     kQATextureFilter_Fast                       = 0,
>     kQATextureFilter_Mid                        = 1,
>     kQATextureFilter_Best                       = 2,
>     kQATextureFilter_Size32                     = 0xFFFFFFFF
> } TQ3TextureFilter;
>
> but I'm unsure how to use them.  I have only found two functions so far
> that seem related to this:
>
> Q3InteractiveRenderer_GetRAVETextureFilter
> Q3InteractiveRenderer_SetRAVETextureFilter

That's them...

> The problem is, I can't figure out where in Queeg or in Qut I get 
> access
> to a TQ3RendererObject, which is required by both functions.

Hmmm, I've never actually used Queeg/Qut but perhaps they should wrap 
texturefilter control internally so you don't have to dig for 
pointers... sorry I can't be of much help here.

> Are these the functions I'm supposed to use to set texture filtering?
> They're both RAVE.  I thought perhaps I was supposed to be looking for 
> a
> generic solution...whatever generic means.

Yes these are a bit of a sticky point with Quesa and a result of it's 
QD3D roots, but that's how it's done. It may make sense to use a more 
generic API nowadays, and it would also make sense if textureshaders 
could override the global settings, since filtering happens per-texture 
anyway (or perhaps a new TextureFilterStyle object is in order?), but 
for the moment the RAVE filters are all we got.

> I successfully switched my code from mipmaps to pixmaps (new to me 
> since I
> haven't used pixmaps before), but the program doesn't appear to be 
> using
> lower res textures in the distance, so I think the default value is to 
> not
> filter, "fast" I think, which is what the docs say is the default, so
> that makes sense.

The default should be mid (unless Queeg/Qut are changing it behind your 
back). Note that auto-mipmapping was introduced after the last official 
release so it will currently only work if you compile Quesa from the 
CVS source.

Frank.