Re: [Plib-devel] Can LOD selector branches be nested?

[Steve B. <sjb...@ai...>]

"Vallevand, Mark K" wrote:
> 
> Can LOD selector branches be nested?

Yep - certainly.  You can nest arbitary glBranch derivitives to
arbitary depth in any old order.

If you put a LOD within a LOD then the node nearest the root
of the scene graph will be evaluated - and one of it's kids
selected for rendering depending on range.  If that child node
(or one of it's descendents) is a LOD node then it will then
be evaluated and so on down the tree.

Obviously it doesn't make much sense to have the first of
those nodes having a transition range of (say) 0 to 100meters
and the child LOD node having a 'wider' range (say) 0 to 150meters
since the latter will always pass (unless there's a transform
node inbetween or something).

Generally, the child nodes would always have transition ranges
that lie *within* the transition range of the parent LOD node.

But there is nothing to stop you ignoring that advice if you
have good reason.


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