D Luff writes: > Yes, that's basically what I'm planning to do. I keep forgetting > you're a driving sim guy and probably have some very relevant > expertise here. What co-ordinate systems are you using?
That's not a trivial question to answer, why don't I say we are using the MN state plane coordinate system which maps into X, Y, Z with Z being up, X being in the longitude direction, and Y being in the latitude direction. > At airport level lat/lon spherical co-ordinates are really overkill > for whats basically a planar problem. I was considering assuming > that for a limited area (a few miles each way) one could assume that > lines of lat and lon were straight and parallel, and possibly map > the lat/lon to x/y depending on latitude to get the x and y axis > subdivisions equal. > This would be a lot cheaper that doing proper spherical -> planar > projection. The logical network would be defined in terms of these > x,y and the airplanes lat/lon quickly and cheaply converted. > Comments? For doing 2d positions near the airport that might be ok, but when you calculate which heading you want to travel to go from point A to point B, you might be a fair bit off if you don't use spherical or wgs-84 coordinates. This could result in the autonomous airport traffic taxing off the edge of a long taxiway, or getting pushed off the edge of a long runway, or doing other odd stuff. Regards, Curt. -- Curtis Olson IVLab / HumanFIRST Program FlightGear Project Twin Cities [EMAIL PROTECTED] [EMAIL PROTECTED] Minnesota http://www.menet.umn.edu/~curt http://www.flightgear.org _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
