Re: [Algorithms] VIPM on a machine with DMA :)

[Jamie F. <j.f...@re...>]

Tom Forsyth wrote:

> The 12 bytes per vertex may be worth it if it means you can draw many
> instances at once without any extra indices being DMA'd in for each one.
> Hmmm... actually, that may not be true - it's total memory that is a problem
> as well - once DMA bandwidth is below a certain level (which it probably
> will be for indices), it ceases to be the bottleneck. You're right - do the
> expand/collapses on the CPU.

There's a whole load of balancing to do, and being in the first wave means noone
has any real idea of where the balance should be struck. Hohum :)

I may actually get round to reading the papers this time :)

>
>
> I'm sure you must be able to get indices fast. Vertex reuse (_after_ the T&L
> is done) will be a fairly big timesaver - it certainly is in the PC/DX
> world.

We're not sure whether it would be a win or not, as the degree of vertex reuse
is currently unclear. Then we'll see :)

Jamie