--- Norman Vine <[EMAIL PROTECTED]> wrote: > David Megginson writes: > > > 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 is exactly why there was, and I think still is, a > cg == center of geometry > and a > CG == Center of Gravity > > Both are needed and both are 'aptly' named > > Can we decide which one gets the UPPER CASE > once and for all now ?
No matter the case, cg will always be center of gravity to me ... > > Norman > > > _______________________________________________ > 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
