[ODE] visibility detemination?

[Adam D. Moss]

gl wrote:
> BTW, what is ODE's hash space internally - is it an octree?

I gave it a cursory look recently.  AFAICT from a quick terrified
glance it's similar to an octree (didn't notice whether each
subresolution is offset -- I don't think it is, which might be an
opportunity for future optimization) but its sparse cells are hashed
by location and resolution instead of being kept in a strict
hierarchy, so there's little need to walk up and down recursively
or know the realistic extents of the tree (neat).

-- 
Adam D. Moss   . ,,^^   adam@gimp.org   http://www.foxbox.org/   co:3
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