On Wed, 3 Apr 2002 20:47:57 -0000 "Jim Wilson" <[EMAIL PROTECTED]> wrote:
> If there is something that I need to use that comes >from the FDM let me know what it is and how to use it. > But I'm not going to be setting the eyepoint with FDM data (other than >offseting it from the available origin value). Because, as I said > before, the eyepoint is not necessarily the pilot's eye. I'm not sure I understand what you are saying, here. I will say, however, that if there is a viewpoint given for pilot eyepoint in a JSBSim config file it would be good to reference it somehow (even if you copy it into an aircraft 3d model file) because it will be accurate information for the *pilot* eyepoint, if nothing else. >It looks like most of the 3D models have the "origin" on >the firewall. I think that is what JSBsim is using too. Actually, that is not necessarily the case. Tony created the coordinate frame there and its just as good as anything else. For us FDM guys, for the most part, it is the relative locations of various items that is most important. However, the X-15 and Space Shuttle, etc. models use various other conventions for structural frame origin. >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? FWIW, the CG location can/will change as fuel is burned off and external stores (if present) are dropped. Jon _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
