Re: speed question

[Keith W. <kw...@cs...>]

On Tue, 13 Jul 2004, Frank C wrote:

> Depending on your needs this may indeed be faster than letting
> Quesa/OpenGL handle it, since you can control exactly how many textures
> to use whereas Quesa always uses a full set. I'm actually very
> surprised you see a speed up when using more textures rather than just
> using one, but maybe your full-size texture is a little much for your
> hardware, or it's being uploaded more often than it needs to be.

Another reason it helps is that I have a lot of tiles active, and at their
highest resolution I doubt they would all fit in VRAM.  Using much much
smaller textures for most of the tiles cuts down the VRAM requirements by
a huge factor, since I drop off the texture resolution exponentially with
distance while at the same time there are a larger number of tile far away
than close by (proportional to the circumfrance of the circle at a given
radius).

________________________________________________________________________
Keith Wiley                                kw...@cs...
http://www.unm.edu/~keithw                 http://www.mp3.com/KeithWiley

"Yet mark his perfect self-contentment, and hence learn his lesson,
that to be self-contented is to be vile and ignorant, and that to
aspire is better than to be blindly and impotently happy."
                                           --  Edwin A. Abbott, Flatland
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