[GEM-dev] vertex_array branch

[guenter geiger]

On Thu, 26 Aug 2004, IOhannes m zmoelnig wrote:

> guenter geiger wrote:
> > I had done that 4 years ago with the (original?) sig2pix external that I
> > wrote. It was fast. It was not very general though ...
>
> the sig2pix hasn't changed much since (at least i don't think that
> performance has decreased)

Ah, sorry then. I have to admit that I haven't used that for a long time,
and I could vaguely remember that in order to get a waterfall display
with the new pix2sig you had to use a large blocksize with overlap, which
in theory should reduce the performance "overlap" times.
But maybe I am talking nonsense here.

Guenter

> i haven't done any profiling, but i think a lot of CPU-power is wasted
> while casting from float to int and back again, and when getting the
> luminance of the image to map to vertices.
> performance isn't *that* bad, bit i thought it could be better.
>
> i don't think that conversion to pixes and then to vertices is optimal.
>
> > Just found it amusing ... back to lurker state.
>
> mfg.asr
> IOhannes
>
>
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