Any ideas how to fix problem when running genapts?

I am a programmer and multiengine/instrument pilot, have been working
with FlightGear for many months, and would like to contribute improved
scenery for some airports in the US. I have already modeled some
objects using AC3D and successfully placed them, but I now find that I
need to add/move taxiways and otherwise make the type of changes such
that I must obviously run terragear to regenerate scenery to complete
my project.

I'm seeing the following error when I run genapts:

Internal error in segmentintersection():
  Topological inconsistency after splitting a segment.
  Please report this bug to [email protected]
  Include the message above, your input data set, and the exact
    command line you used to run Triangle.

The last full screen worth of data leading up to the error is enclosed,
below. It appears that genapts is choking on something to do with the
airport KAID. Changing the longitude/latitude bounding box to genapts
does not help, I still get the error on KAID no matter what bounding
box I choose.

I sent a bug report to the address requested by the error message, and
have not heard anything back from the author regarding this problem.

I took the CVS snapshot of terragear source as of July 1 2006. The OS
I'm using is FreeBSD 6.0-RELEASE. I have GPC and newmat installed, and
have removed -O2 optimization from the TriangleJRS directory and
applied a patch to SimGear's newbucket.hxx as recommended by:

http://wiki.flightgear.org/flightgear_wiki/index.php?title=Building_Terragear

FYI, I have FlightGear 0.9.10 and SimGear 0.3.10 installed and working.

The invocation I used for genapts (using extracted DEM-30 data) was:

$ genapts --input=apt.dat.gz --work=../../work/ --min-lon=-100 --max-lon=-80 --min-lat=30 --max-lat=40

My main interest is presently for the scenery tiles w100n30 & w090n30.

Has anybody tried putting together a script that does a complete
scenery build from scratch? If so, I could perhaps use such a script to
partition my problem to a potentially incorrect build versus something
I might not have done quite right during extraction/setup of the data
files before running genapts.

I am willing to switch to using cygwin, if anybody has been successful
generating scenery with terragear on windows using cygwin. I have also
accumulated a list of things which I had do different from the
published procedure to get terragear to build on FreeBSD.

If anybody has been successful building scenery using the current code
from CVS, it would be very helpful to see even a command line history
dump of the commands you ran to successfully produce any scenery tiles.

Any and all pointers would be greatly appreciated,

...Marc...

------------------------------------------------------------------------

Next airport = KAND 782
Building KAID
Runway count = 2
Taxiway count = 10
w090n40/w086n40/1548417
18  40.109305 -085.613890 1 Light beacon
19  40.112441 -085.622635 1 Windsock
19  40.105175 -085.605755 1 Windsock
19  40.112976 -085.610562 1 Windsock
19  40.103643 -085.611613 1 Windsock
Building runway = 12x
Runway 12x is not long enough (5386) for precision markings!
Reverse displaced threshold = 88
Runway num = '12x'
Forward displaced threshold = 301
Reverse displaced threshold = 298
Runway num = '18x'
gen reil 12x
length hdg = 115 left heading = 25.1
gen vasi 12x
gen vasi 12x
gen ALSF/SALS lights 12x
length hdg = 295 left heading = 205
rwylt1 = 3 app1 = 1
threshold lights for forward direction
gen threshold 12x
length hdg = 115 left heading = 25.1
rwylt2 = 2 app2 = 3
gen papi 18x
length hdg = 180 left heading = 89.9
rwylt1 = 2 app1 = 1
threshold lights for forward direction
gen threshold 18x
length hdg = 180 left heading = 89.9
rwylt2 = 2 app2 = 1
threshold lights for reverse direction
gen threshold 18x
length hdg = 360 left heading = 270
Internal error in segmentintersection():
  Topological inconsistency after splitting a segment.
  Please report this bug to [email protected]
  Include the message above, your input data set, and the exact
    command line you used to run Triangle.


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