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

[Vallevand, M. K <Mar...@UN...>]

Thanks.  I've tried to make this work with limited success.
But, the comment about transition ranges is my likely
culprit.  I think I'm off by some factor.  I get some
really funny fragments displayed as I move over the
terrain.  

Regards.
Mark K Vallevand   ma...@rs...
Outside of a dog, a book is man's best friend.
 Inside of a dog, its too dark to read.  - Groucho


> -----Original Message-----
> From: Steve Baker [mailto:sjb...@ai...]
> Sent: Friday, April 21, 2000 12:36 AM
> To: pli...@li...
> Subject: Re: [Plib-devel] Can LOD selector branches be nested?
> 
> 
> "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.
> 
> 
> -- 
> Steve Baker                  http://web2.airmail.net/sjbaker1
> sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
> sj...@ht...      (work)
> 
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