Hi! Ralf Gerlich wrote: > While it seems to me that the workaround should work, due to previous > experience with TerraGear and its subtleties I would not want to bet on it.
...and I see that I was right not to bet: The workaround doesn't work. TerraGear failed on the first try building the EDDF-area. > The actual problem lies within TriangleJRS, the triangulation code of > TerraGear, which - as several checks have shown - is not as robust as > advertised regarding computational geometry predicates. The > "point-in-triangle"-detection-code does seem to have problems if the > respective point is pretty near to the contour of the triangle. While > the point is perfectly inside the triangle, TriangleJRS cannot detect that. Nope, that's not it... I have just checked once more and found that triangles for the extremely small triangle parts simply do not exist. They are not generated by TriangleJRS. This could have one of two reasons: 1) TerraGear does some specific edge-splitting when preparing the list of nodes and constrained edges for TriangleJRS. This is sensible, but may move the nodes of the slivers in a co-linear fashion, i.e. the sliver parts completely vanish. 2) TriangleJRS removes the triangles for these parts as it thinks they are too small. After some checking it seems that 1) is the case. I'm at it and I hope to still be able to do a rebuild as announced with a new solution. However, don't count on it. The call for submissions to the static scenery objects database is left as is ;-) Cheers, Ralf ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
