--- David Megginson <[EMAIL PROTECTED]> wrote: > Jim Wilson writes: > > > 2). On a fixed wing aircraft, if origin is anywhere but between > the > > wings the external model views that follow along with the aircraft > > (e.g. chase view) will not look correct. The camera is tied to > the > > origin. If the origin is at the nose or tail then the plane > > "looks" like it's wagging when it pitches. And if the origin is > > too high or too low again the model can "appear" to be swinging > > like a pendulum or sliding when it should simply be rolling. > > OK, finally I understand the problem. What we need to do, then, is > apply the euler angles to the CG rather than the origin when rotating > the 3D model. We need only two steps: > > 1. have the FDMs report the current CG relative to the origin (if > they > don't already); and > > 2. add a couple of transforms to acmodel.cxx so that we use the CG as > the centre of rotation. > > This will be especially nice for modelling out-of-balance situations > (like 500lb of baggage in the back of a 172) -- everything will come > out looking right. It will also be valuable for aircraft that have > massive balance shifts, like a military aircraft dropping ordnance. > I > don't expect that this will be a big job. What does everyone else > think? >
Since this makes the 3D modeler's choice independent of the FDM modeler's choice, it seems the most sensible to me. > > 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 > > __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
