Jim Wilson wrote: > Andy Ross wrote: > > The FDMs already take the c.g. into consideration. If a stopped > > aircraft rotates (about the c.g, of couse), you will see the > > coordinate origin moving. > > Well this might be useful to the 3D model. The effect probably isn't > all that noticable compared to what we have now, but a real plane > would pitch and roll about it's cg rather than the fixed "origin" as > defined in a 3D model, wouldn't it?
It would indeed. And it already does. Again, the rigid body magic required to move the coordinate origin appropriately for a given rotation about the center of gravity is the FDM's job. They already do this; all the rest of the system has to do is draw the origin at the right place. Once more: there's no error. Things are taken care of for you by the physics code in the FDMs. Andy -- Andrew J. Ross NextBus Information Systems Senior Software Engineer Emeryville, CA [EMAIL PROTECTED] http://www.nextbus.com "Men go crazy in conflagrations. They only get better one by one." - Sting (misquoted) _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
