[Therion] Scaling issues with .3d files

[Olly Betts]

On Tue, Mar 14, 2006 at 08:19:36PM -0500, Philip Schuchardt wrote:
> 10> Vertical range = 42949672.68m (from 20 at 42949672.68m to 21 at 0.00m)
> 11> North-South range = 42949672.86m (from 495 at 42949672.86m to 21 at 0.00m)
> 12> East-West range = 42949672.91m (from 15 at 42949672.91m to 21 at 0.00m)

This looks like some weird coordinate wrap-around, since 42949672.91m is
0xfffffffb cm, which is -5cm if interpreted as a signed value.

I think the problem must be in the data being fed into Survex, since
Survex itself doesn't store coordinates in integer cm until after this
point (they're used to store coordinates in the .3d file).

Cheers,
    Olly