-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 James Turner schrieb: > (following from my recent discovery that Point3D is archeology at > best...) > > What is the 'best' type to be using in new code for Cartesian co- > ordinates? Not for rendering related things, where I assume osg::Vec3 > is the way to go, but for other numerical work. In my case, fast > distance comparisons of FGPositioned. > > SGVec3<double> seems like the obvious candidate, but it's a very > Spartan class - not much syntactic sugar to help with manipulating it. > I could submit patches to extend it, but I want to check that it's the > right class, and the right approach, before going down that path. > > Maybe osg::Vec3 is also the way to go for all Cartesian coords?
FGFS is a mess when it comes to vector libraries. Back in my coding times there were classes for it in use. They came from: PLIB, SimGear and JSBSim. Now it seems OSG brings another lib as well... My suggestion it totally different: I've looked at the development of Eigen2 (http://eigen.tuxfamily.org/) for a while. It has a very clear API, powerful linear algebra functions and is extremely fast. As it uses expression templates it even has the potential to be faster than any ordinary library. => My suggestion is to port all vector stuff to Eigen2 (a smooth transition should be possible) and use it exclusively. (Eigen2 doesn't have polar coordinates yet and doesn't offer our advanced geographic calculations yet, but those should be easy to add... Hey, if there's a consensus to port FGFS I offer to extend Eigen2 by this functionality :) CU, Christian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEAREIAAYFAkk0Kr0ACgkQoWM1JLkHou1pUgCeK+iIdXE+IbOf3hVjLkz0yLwc ax8AnREqJ0F7NSNJ+EMDYqTPWg6gDX6t =dx2A -----END PGP SIGNATURE----- ------------------------------------------------------------------------- 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
