Jim Campbell wrote: > The modelling of a generalised rigid body with six degrees of > freedom in a rotating frame of reference should max out anyones and > everyones CPU!
People were doing that in real time with VAX 11/780's in 1981. :) Seriously, no: the FDM takes up comparatively little CPU. Of the two main ones, YASim is the slowest, because it breaks the fuselage down into a bunch of discrete units that need to be individually handled. The last time I looked at this YASim took up about 5-7% of so of the total CPU budget for the flight model I was looking at. I honestly forget when this was, on what computer, or what plane I was using. Sorry, but the 3D graphics are the lions share of the performance budget, and always will be. > Of course any model is only as good as the approximations used so we > apply symmetry to an aircraft (what happens if an engine drops off!) > and various other restrictions. YASim is perfectly happy with asymmetric aircraft, FWIW. Andy _______________________________________________ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
