Doh.  Looks like I solved this one already by setting the switch-in
distances on my filenames to infinity.  Guess I should have thought of
that before.  Thanks anyway....
- Terry

Message: 26
Date: Tue, 19 Dec 2006 11:15:47 -0800
From: "Terry Welsh" <[EMAIL PROTECTED]>
Subject: Re: [osg-users] Metaflight loader
To: [email protected]
Message-ID:
        <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Thanks Murray.  I'll be sure you get you a copy when the loader is
ready for stress-testing.

Now I have a little logic question for anyone who has done terrain
paging.  I want terrain tiles at level 1 to be replaced by multiple
tiles level 2 simultaneously.  But if each tile has its own LOD center
then level 2 tiles pop in at different times as you approach them, and
this causes holes to appear in the terrain.

I can fix this problem between levels 1 and 2 by setting the same
center on all these tiles.  However, this center is inappropriate for
the level 3 children of a level 2 tile.  What I really need is for
each tile to have have a separate switch-in center and switch-out
center.

My scene graph is set up in units that look like this.  A PagedLOD has
multiple child PagedLODs and one filename representing the tile at
that level.  Each of those child PagedLODs contains multiple PagedLODs
and a filename just like this one.

PagedLOD ---  PagedLOD
                        PagedLOD
                        PagedLOD
                        PagedLOD
                        FileName

Does this explanation of my problem make sense?  Is there a better way
to set up the graph to solve this problem?
- Terry

> Hi Terry,
>
> I'd be interested in supporting your effort to create a (partial) MetaFlight
> loader in any way that I can.  My lab uses both OSG and Vega Prime (w/
> LADBM) on a regular basis and would welcome the addition of this capability
> to OSG.  I can't promise months of programming support, but we have several
> bright programming sparks in the lab and would be happy to support testing,
> etc., if it would be of help.
>
> Cheers,
>
> Murray
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