osgHello,

I was trying to import a single large OBJ file of size 749 MB. This
has upward of 3 million polygons. I tried using the "10loading"
tutorial program to import it, but that was a disaster and used up too
much of my time. I lost patience there and wrote a script to split the
model up into smaller files. This resulted in 3247 OBJ files.
Naturally, I had to modify 10loading to load multiple files. I used a
Group core & made every loaded file a child of the group.

After this change, I was able to load all the 3247 OBJ files in 384
seconds. The total size of these files is about 666 MB.

Next, I thought of speeding up the loading process. I modified the
program again to save an OSB file after loading everything. The result
OSB file was about 240 MB.

Next, I used 10loading to load the OSB file. The load time I'm seeing
is 750 seconds - which is about two times the time needed to load the
original OBJ files !

Can anybody explain why the OSB file could be taking more time to load ?

The OSB file is a binary format, and I expect it to load faster than
the OBJ files. Loading the OBJ files involves parsing, creating the
mesh, reindexing, etc.

Thanks
-- Shree
http://www.shreekumar.in/

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