Geographical Texture Data

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Martin Roth (roth++at++ifi.unizh.ch)
Mon, 12 Dec 1994 18:18:00 +0100

Hi folks,

we are working on a GIS project. Yet, we are able to virtually fly through
Switzerland. The necessary (big amount of) scene data is prevented in realtime
by an object-oriented database through an Ethernet network. In order to increase
the reality of the rendering we are trying to implement a texture mapping of
satellite data on the polygon surface. As you can imagine texture data is
considerably increasing the amount of data to transfer.

At the time we are dealing with three levels of detail. We are working on a
4 Mbyte texture RAM Onyx. In order not to run out of texture RAM it probably
will be inevitable to introduce the concept of LODs into the texturing, too.

Is there an easy (and RAM saving) way to realise texture LODs, eventually
preventing the possibility of incrementally loading higher LODs?

In order to realise the incremental loading is it possible to expand the actual
texture bitmap in a fast way and then add details to the expanded texels?

Thanks for your suggestions... ;-)

Martin Roth
_______________________________________________________________________________
 /| /|) S. H. Martin Roth
/ |/ |\OTH Student in Computer Science

ETHZ, Swiss Federal Institute of Technology Zuerich email: sroth++at++iiic.ethz.ch
UniZh, University of Zuerich email: roth++at++ifi.unizh.ch

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