Hi Chris, thanks for your input.

1.
Thanks for your preload idea, but I had a unpleasant dicussion with robert 
(http://forum.openscenegraph.org/viewtopic.php?t=8538), because the term 
"preloading" is often named, but there is no information what this is in detail.

Can you help me and give a short overview how to preload a plugin? 
Additionally, do I have to "open" my loader to all file extensions? I tried it 
but that does not work, all subtiles are loaded then with the native .ive 
loader and not with my modification loader.

In the Constructor of the loader I have these calls to allow all file endings:

Code:

supportsExtension( "terrainmod", "Terrain modification pseudo loader");
supportsExtension( "*", "Terrain modification pseudo loader");




but then the plugin is not longer used, even the old behavior with he 
pseudoloader extension ( calling "osgviewer terrain.ive.terrainmod" ) does not 
work any longer.

2.
Yes, keeping the original data with meta data system looks feasible.

3.
To sum up what I havbe understood: Applying a visitor while data is displayed 
is only allowed during the update phase. Do I have to mark data as dynamic? The 
work of the visistor will stall the rendering process till its finished, right?

Because stalling the rendering process should be avoided, wouldn't it be better 
to reload the affected tiles by the database pager, and then replace the tiles 
if they are loaded? This also unifies the modification process because only 
modification-by-loading is done.

I thought the cleanest solution would be that all affected tiles are marked as 
dirty, so the database pager wuold reload the tiles.

My question is: Is there a mechanism in the databasepager to mark tiles as 
"dirty/to-reload ? 

Sorry for all that questions, but I'm still in a phase where reading sourcecode 
does  not clarify things, and I'm struggling wiht OSG's documentation....
 

Thank you!

Cheers,
Torben

------------------
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http://forum.openscenegraph.org/viewtopic.php?p=40546#40546





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