Santa's production line

re: Santa's production line

CGomez — Sat, 12 Apr 2008 16:53:17 GMT

Your hard work, advice, and knowledge that you share in these posts are nothing short of a public service to hobbyists. I know you and the other hard working bloggers on the XNA team have work to do, but thank you for the time and effort to share your experience.

re: Santa's production line

Ultrahead — Sat, 12 Apr 2008 22:18:20 GMT

Great post. Just a few minor things, if I may:

"The texture fetch unit looks up any textures that were requested by the pixel shader". From shader model 3 and on, this can also be used by the vertex shader (know as "Vertex Texture Fetch").

"Try running your game in a tiny resolution, say 100x50". But still on fullscreen, otherwise you'll be also moving from "swapping" to "copying" the backbuffer (the former is faster, of course).

My five, sir.

re: Santa's production line

fn2000 — Thu, 17 Sep 2009 01:01:47 GMT

What are actual downsides of using vertex data compression? I assume we lost vertex data precision but how it really impacts real-life applications?

Thanks,

fn2000

re: Santa's production line

ShawnHargreaves — Mon, 21 Sep 2009 19:49:48 GMT

> What are actual downsides of using vertex data compression? I assume we lost vertex data precision but how it really impacts real-life applications?

If your app is bound by vertex fetch memory bandwidth, reducing the size of the vertex data could give a big speed boost.

If your app is bound by some other part of the GPU, this will make no difference to performancce (but will still obviously save memory).