On 2 Oct 2011, at 19:00, J. Holden wrote:

> Still, as a scenery developer and not a programmer, I'm still wondering what 
> the limit is before the "swirlies" start floating around. Is it vertices? 
> Fans? Triangles?

It's 65536 vertices per BTG, in total. Strictly, this isn't true - the BTG 
format already supports 2^32 vertices / normals / colors in the file, but any 
object (tri / strip / fan) can only specify any index from 0..65535, so the 
higher vertices can't be used in any meaningful way.

The good news is, I have the code to read a newer version basically done, which 
will make all the indices 32-bit, while of course keeping compatibility with 
existing BTG files of the current versions.

Bad news is, we also need to update the writer code, and then measure how much 
the file size increases, after gzip compression. 

James


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