-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ralf Gerlich schrieb: > > I'm not sure how important giving back to Robin's DB is for "the > FlightGear community" but in the OpenSource manner I'd say we should try > to find a way of not doing things twice in two communities. >
We should try to scratch only our own itch. Robin's DB is a great start, but when it limits us it's not good enough anymore. BUT, of course, Robin should be able to use our data as well, when he likes to. So we could offer an DB enhancement and Robin can follow if he wants to. >> Polylines should be sufficient (as long as you don't need things like >> bridges, i.e. stay 2D). >> To find out if you are outside (e.g. on grass) you do a line walk. I.e. >> you start on the outside (e.g. from far far away) and walk on a line to >> the desired position. On that walk you cound how often you've crossed a >> polyline. Each time you cross it you change from outside to inside (or >> the other way round). > > > You are probably talking about planar partitioning, where different > faces are defined by separating lines. (The only links I can find in a > quick google search on "topological maps", "planar maps" or "DCEL" > (doubly connected edge lists) are from the CGAL-manual or > non-introductory papers) > > [SNIP] > >> Doesn't TaxiDraw already use CGAL? With CGAL you've got all that you >> need for that. > > > TaxiDraw doesn't use CGAL currently. Sorry, I mixed the CGAL useage up with the FlightGear scenery designer. But that doesn't change the perfect fit of a constrained delauney triangulation for this case... CU, Chrisitan -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) iD8DBQFDUrCalhWtxOxWNFcRArU9AKC1Suw2+bCDm66pfbiecGmH0kph5wCfV4hl O9GFJRhGjS9/2XlxzpUvoMc= =xeZk -----END PGP SIGNATURE----- _______________________________________________ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
