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tlopes's avatar
tlopes
Honored Guest
12 years ago

Dev Feedback on OVR SDK 0.3.1 Preview

Hey guys, it looks like you're cramming a whole lot of features in to this release! Here's my first impressions with the new Distortion Renderer code in the new SDK: (Disclaimer: I mostly looked at...
kojack's avatar
kojack
MVP
12 years ago
"tlopes" wrote:
Even if you have to use degenerate triangles it's much more efficient to use a strip than a list:

It's true the list version will have more indices. However a well optimised triangle list will use the vertex cache far better than a strip, resulting in less vertex shader calls.

Here's an article on grid rendering: http://www.ludicon.com/castano/blog/2009/02/optimal-grid-rendering
From there:
Method          ACMR    ATVR
Scanline        1.062   1.882
NVTriStrip      0.818   1.450
Morton          0.719   1.273
K-Cache-Reorder	0.711   1.260
Hilbert         0.699   1.239
Forsyth         0.666   1.180
Tipsy           0.658   1.166
Optimal         0.564   1.000

The Forsyth method on there (third best) is by Tom Forsyth, who works at Oculus now. :)
http://home.comcast.net/~tom_forsyth/papers/fast_vert_cache_opt.html