Dynamically loading (paging) a large database

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Bernard Leclerc (bleclerc++at++cae.ca)
Wed, 24 Aug 1994 09:20:19 -0400 (EDT)


Hi Performer fans,

I'm fairly new to Performer but I've been in the real time simulation domain
for a while. After reading part I of the IRIS Performer Programming Guide, I
have full of questions to ask. Here is the first one.

Our application requires very large databases - one covers 1100 km by 900 km.
It's clearly not possible to load the entire database in memory at init time.
Our approach consist in having a separate loader whose task is to monitor the
viewpoint and to load the surrounding tiles. At every iteration, the whole
Performer hierarchy is rebuilt from the loaded tiles. Is there a better way of
approaching the problem? How can the Performer hierarchy be updated at run time
with new terrain data and how can we remove old data from it?

-- 
Bernard Leclerc
CAE Electronics Ltd.
tel.: +1 514 341 2000, local 2275
e-mail: bleclerc++at++cae.ca

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