concave data

[vkulikov@mit.edu]

hi,

i have concave-patches data available. you can find .rooms and .portals files
at:

/scratch/vkulikov/WALKTHRU/walkthru/mit/src/basemapv4.0/Data/basemap.ug.*

the size of the .rooms and .portals files is 7MB and 11.5MB resectively, which
is a big improvement. for performance reasons i have to limit the size of each
patch. currently, each patch is at most 32 triangles. i am going to optimize the
code to reach the limit of 100 triangles per patch or even more, though my tests
show that this isn't likely to decrease the total size of the output by a lot.

vitaly