Re: [osg-users] PagedLOD and DatabasePager problems.

Rafa Gaitan Wed, 31 May 2006 13:59:08 -0700

Well, we are not experimented in the use of DatabasePager... but I thought that could be necessary to have the PagedLOD files previously on disk. If we create tiles during navigation.. and textures could change in any moment, or even elevation maps.. then is not possible to have geometry tiles on disk, is more easy to have tiles in memory.. but unloading those less used, and regenerate the tile if is necessary view it. But if you have any other suggestion, I'm very open minded! :).

I'm also thinking to implement something similar to this:
http://www.opengl.org/news/permalink/ovplanet_planetary_terrain_renderer_renders_high_detail_textures_using_the/

Sorry direct link is not working for me now :(

but by now I prefer to continue the current development, because is not clear to me in a unique generated earth mesh.. apply height fields and texture tiles.

Rafa.

On 5/31/06, Chris Hanson <[EMAIL PROTECTED]> wrote:

Rafa Gaitan wrote:
> Well, our own tiles.. are an extension of PagedLOD (TilePagedLOD), they
> incorporates a tile identification inside... The idea is make all system
> dynamic, to support variable layers and in general support GIS datasets.
> I know that PagedLOD.. and DatabasePager is not made to support this
> architecture, and we are extending functionality to do it.
> By now the system creates tiles on demand .. and requestTexture and
> HeightFields to a data acces layer. The problem is the continuous
> increment of memory, and we want to use (or extend) the databasePager to
> unload those tiles less used. If is necessary create those tiles
> again..it's ok.. we create and request data again. We have a disk cache
> of texture and HF tiles, so it's quickly to reload it.
> Any suggestion about the implementation of the DatabasePager?

   I do all this already, without having modified DatabasePager at all.

   What part do you think DatabasePager is missing?

> Thanks.
> Rafa.

--
Chris 'Xenon' Hanson aka Eric Hammil | http://www.3DNature.com/ eric at logrus
  "I set the wheels in motion, turn up all the machines, activate the programs,
   and run behind the scenes. I set the clouds in motion, turn up light and sound,
   activate the window, and watch the world go 'round." -Prime Mover, Rush.
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Re: [osg-users] PagedLOD and DatabasePager problems.

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