[osg-users] What happens to the Low-res data of a PagedLod whenthe hi-res data has been paged in ?

Gordon Tomlinson gordon.tomlinson at sensor.com
Thu Jul 3 08:58:47 PDT 2008


Hi Robert 

Thanks for quick reply, its as I expected and understood

Our use case unfortunately will require us to remove the previous level
geom. and page it back if require later for various reasons



-----Original Message-----
From: osg-users-bounces at lists.openscenegraph.org
[mailto:osg-users-bounces at lists.openscenegraph.org] On Behalf Of Robert
Osfield
Sent: Thursday, July 03, 2008 11:43 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] What happens to the Low-res data of a PagedLod
whenthe hi-res data has been paged in ?

On Thu, Jul 3, 2008 at 4:35 PM, Gordon Tomlinson
<gordon.tomlinson at sensor.com> wrote:
> What happens to the Low-res data of a PagedLod when the hi-res data 
> has been paged in ?
>
> Is the low-res data released once the hi-res is children are in or is 
> it retained, rather than having to page it back in ?

The low-rest children are always kept around whilst the high res versions of
them remain actively used.

Once the high res children got out of view they will get removed after the
expiry delay and their OpenGL objects will be recycled.  The expiry happens
from high res levels down to low res levels.

Robert.
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