RE: [Algorithms] Terrain performance comparrisons

[Jon W. <hp...@mi...>]

> what are the major contending algorithms for modern systems?
> the three I've decided to try out are ChunkedLOD, Roam 2.0 and=20
> Geomipmapping.
> Are there any others which have feature sets drastically=20
> different from these=20
> three?

You could look into the article series on general geometry LOD which=20
Jon Blow just finished in Game Developer (it's a five-part series).

> If I want to maintain backwards compatibility with older systems=20
> should I use=20
> an older algorithm (original roam) or do the newer ones still=20
> work even if you=20
> can't assume there's a fast GPU?

In the end, you have to transform the verts somewhere. The difference=20
between algorithms is in their assumptions about what the cost of a=20
vertex is, and what the appropriate vertex count vs work trade-off is.=20
Still, touching memory means touching memory; examine a million verts=20
to find the optimal 7000 might be much slower than examining a few=20
tree nodes and drawing 9000. YMMV.

Cheers,

			/ h+