Andy Ross writes: > Look at the wind over ground at the current location. Calculate > the up- or down-slope of the ground in that direction. Figure out > an up or downdraft based on the amount of air that must be > vertically displaced.
I thought of looking at the surface normal, but we'd have to sample over a wider area to know if we're looking at a ridge or just a little bump. All the best, David -- David Megginson, [EMAIL PROTECTED], http://www.megginson.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
